EXHIBIT 2.2

                                 EXECUTION COPY

                            STOCK PURCHASE AGREEMENT

                                  BY AND AMONG

                             AMKOR TECHNOLOGY, INC.

                                       AND

                    UNITIVE SEMICONDUCTOR TAIWAN CORPORATION

                                       AND

                             CERTAIN SHAREHOLDERS OF

                    UNITIVE SEMICONDUCTOR TAIWAN CORPORATION

                                  JUNE 3, 2004




                                TABLE OF CONTENTS


                                                                                          
ARTICLE I             SALE AND TRANSFER OF SHARES; CLOSING                                       1
     Section 1.1      Definitions                                                                1
     Section 1.2      Basic Transaction                                                          1
     Section 1.3      Purchase Price                                                             2
     Section 1.4      Closing                                                                    2
     Section 1.5      Closing Obligations                                                        2
     Section 1.6      Option to Purchase Remaining Shares                                        3

ARTICLE II            REPRESENTATION AND WARRANTIES                                              5
     Section 2.1      Representations and Warranties Regarding the Company                       5
     Section 2.2      Representations and Warranties Regarding the Shares                        5
     Section 2.3      Representations and Warranties Regarding the Purchaser                     5

ARTICLE III           CONDITIONS PRECEDENT TO THE CLOSING                                        5
     Section 3.1      Conditions Precedent to the Purchaser's Obligation to Close                5
     Section 3.2      Conditions Precedent to the Company's and Seller' Obligation to Close      5

ARTICLE IV            POST-CLOSING AGREEMENTS OF THE SELLERS AND THE COMPANY                     6
     Section 4.1      Election of New Directors and Supervisors                                  6
     Section 4.2      Transition Matters                                                         6

ARTICLE V             TERMINATION                                                                6
     Section 5.1      Termination Events                                                         6
     Section 5.2      Effect of Termination                                                      7

ARTICLE VI            INDEMNIFICATION; REMEDIES                                                  7
     Section 6.1      Survival; Right to Indemnification Not Affected by Knowledge               7
     Section 6.2      Indemnification and Payment of Damages by Sellers                          7
     Section 6.3      Indemnification and Payment of Damages by the Purchaser                    8
     Section 6.4      Time Limitations                                                           8
     Section 6.5      Limitation on Amount; Escrow of Portion of Remaining Shares                9
     Section 6.6      Procedure for Indemnification-Third Party Claims                          10
     Section 6.7      Procedure for Indemnification-Other Claims                                12

ARTICLE VII           GENERAL PROVISIONS                                                        12
     Section 7.1      General Provisions                                                        12


                             SCHEDULES AND EXHIBITS
SCHEDULES

A.    List of Sellers

B.    Definitions





C.    Representations and Warranties Regarding The Company

D.    Representations and Warranties Regarding The Shares

E.    Representations and Warranties of The Purchaser

F.    Conditions Precedent to The Purchaser's Obligation to Close

G.    Conditions Precedent to The Company's and The Sellers' Obligation to Close

H.    General Provisions

I.    Pre-Closing Covenants of the Company

J.    Company Disclosure Schedule

K.    Sellers' Disclosure Schedule

L.    Purchaser Disclosure Schedule

EXHIBITS

Exhibit A         Amended Joint Venture Agreement

Exhibit F.4(a)    Main Points  of Opinion of Counsel to Company

Exhibit G.4(a)    Main Points of Opinion of Counsel to the Purchaser



                            STOCK PURCHASE AGREEMENT

            This Stock Purchase Agreement ("Agreement") is entered into as of
this 3rd day of June, 2004, by and among UNITIVE SEMICONDUCTOR TAIWAN
CORPORATION, a company limited by shares organized pursuant to the laws of the
Republic of China (the "Company"), certain of the shareholders of the Company as
listed in Schedule A (the "Sellers"), represented by RAY C. CHANG and DANIEL
TENG, jointly or singly, each as a duly appointed Attorney-in-fact of the
Sellers (each a "Sellers' Representative"), and AMKOR TECHNOLOGY INC., a
Delaware, U.S.A. corporation (the "Purchaser"). The Company, the Sellers and the
Purchaser are sometimes singularly referred to herein as a "Party," and
collectively as the "Parties."

                                    RECITALS

            WHEREAS, the Company is a world-class wafer-level packaging foundry
service house located in Taiwan;

            WHEREAS, the Sellers desire to sell to the Purchaser, and the
Purchaser desires to purchase from the Sellers, (a) Fifty-four Million One
Hundred Twenty-eight Thousand (54,128,000) shares of common stock, par value
NT$10 per share of the Company (the "Shares") (representing 51% of all of the
Shares of the Company held by the Sellers collectively and equivalent to 41.64%
of the issued and outstanding Shares of the Company) if Unitive International
Limited ("UIL") sells all of its Shares to the Purchaser or (b) Sixty-six
Million Three Hundred Thousand (66,300,000) Shares (representing 62.47% of all
of the Shares of the Company held by the Sellers collectively and equivalent to
51% of the issued and outstanding Shares of the Company), if UIL does not sell
all of its Shares to the Purchaser, for the consideration and on the terms set
forth in this Agreement;

            WHEREAS, the Company, the Sellers and the Purchaser desire to
promote their mutual interests by entering into this Agreement;

            NOW, THEREFORE, in consideration of the foregoing premises and the
mutual promises, covenants, representations and warranties made herein, the
Parties agree as follows:

                                    ARTICLE I
                      SALE AND TRANSFER OF SHARES; CLOSING

SECTION 1.1 DEFINITIONS. The terms defined in Schedule B hereto are
            incorporated by reference herein and constitute part of this
            Agreement.

SECTION 1.2 BASIC TRANSACTION. On and subject to the terms and conditions of
            this Agreement, at the Closing, (a) the Purchaser agrees to purchase
            from each Seller and each Seller agrees to sell to the Purchaser the
            number of Shares specified by each Seller's name in Schedule A free
            and clear of all Encumbrances (the "Basic Transaction") and (b) each
            Seller further grants to the Purchaser an option to purchase its
            remaining Shares on the terms specified in Section 1.6 of this
            Agreement (the "Option"). The exact number of Shares to be purchased
            shall be determined immediately prior to the Closing. If UIL sells
            all of its Shares to the Purchaser, then the Purchaser shall
            purchase a total of Fifty-four Million One Hundred Twenty-eight
            Thousand (54,128,000) Shares (representing 51% of all of the Shares
            of the Company held by the Sellers collectively and equivalent to
            41.64% of the issued and outstanding Shares of the Company) from the
            Sellers at the Closing; otherwise, if UIL does not sell all of its

                                                                             -1-


            Shares to the Purchaser, the Purchaser shall purchase a total of
            Sixty-six Million Three Hundred Thousand (66,300,000) Shares
            (representing 62.47% of all of the Shares of the Company held by the
            Sellers collectively and equivalent to 51% of the issued and
            outstanding Shares of the Company) from the Sellers at the Closing.

SECTION 1.3 PURCHASE PRICE. The purchase price will be Eleven and one-half
            New Taiwan Dollars (NT$ 11.50) per Share (the "Purchase Price"), to
            be paid in cash and to be delivered by the Purchaser to the Sellers
            pursuant to Section 1.5(b)(ii) at the Closing.

SECTION 1.4 CLOSING. The closing of the Basic Transaction (the "Closing")
            shall take place at the offices of the Company on June 18, 2004 or
            at such other time and place as the Parties may agree, but in no
            event later than July 2, 2004 (U.S. west coast time); provided,
            however, that if a Force Majeur prevents the Parties from holding
            the Closing by such date, this date shall be automatically extended
            by ten (10) days. Subject to the provisions of Article V, failure to
            consummate the purchase and sale provided for in this Agreement on
            the date and time and at the place determined pursuant to this
            Section 1.4 will not result in the termination of this Agreement and
            will not relieve any Party of any obligation under this Agreement.

SECTION 1.5 CLOSING OBLIGATIONS. At the Closing,

            (a)   The Sellers' Representative will deliver to the Purchaser:

                  (i)   subject to Section F.5, all of the Share Certificates
                        owned by each Seller, duly and properly chopped and
                        endorsed for transfer to the Purchaser (depending on
                        whether UIL sells all of its Shares to the Purchaser,
                        41.64% or 62.47% of which shall be transferred to the
                        Purchaser at the Closing, a portion to be held in escrow
                        in accordance with Section 6.5 and the remainder to be
                        held in escrow pending the Purchaser's exercise of
                        Option); and

                  (ii)  the various opinions, certificates, instruments and
                        other documents referred to in Schedule F to this
                        Agreement; and

            (b)   The Purchaser will deliver to the Sellers:

                  (i)   cash in the amount of the Purchase Price (the "Cash
                        Payment") in immediately available funds by wire
                        transfer to the following escrow account to be
                        administered by the Escrow Agent:

                             Bank Name:       The Farmers Bank of China Foreign
                                              Department
                             Account Number:  08009131312
                             Account Name:    Pamir Law Firm
                             Bank Address:    85 Nanking East Road, Section 2,
                                              Taipei 104, Taiwan
                             Telephone No.:   +886-2-2100-3456
                             Swift Code:      FBOCTWTP
                             Through:         JPMorgan Chase Bank, New York
                                              (CHASUS33)
                                              Farmers Bank Account No.
                                              0011863263
                        and

                  (ii)  the various certificates, instruments and other
                        documents referred to in Schedule G to this Agreement.

                                                                             -2-



            (c)   The Escrow Agent shall pay all applicable securities
                  transaction taxes out of the Cash Payment not later than one
                  (1) business day after the Closing Date and provide the
                  appropriate tax payment receipts to the applicable parties as
                  soon as practicable thereafter. The Escrow Agent shall also
                  pay all Sellers' Transaction Fees out of the Cash Payment.
                  After such payments are made, the Escrow Agent shall pay to
                  each Seller his/her/its portion of the Cash Payment (minus
                  applicable securities transaction taxes and his/her/its pro
                  rata portion of the Sellers' Transaction Fees) to the bank
                  accounts designated by each Seller in his/her/its Seller POA.

            (d)   If on the Closing Date, less than all of the shareholders of
                  the Company have become parties to this Agreement (for failure
                  to return a properly executed Seller POAs), the Purchaser
                  shall deposit into an escrow account an amount of cash in the
                  amount necessary to pay the Purchase Price to these
                  shareholders. As soon as practicable after properly executed
                  Seller POAs are received, upon the instruction of the
                  Purchaser after the Purchaser has obtained requisite foreign
                  investment approval, the Purchaser, the Company and the Escrow
                  Agent shall distribute the Purchase Price to such shareholders
                  in accordance with Section 1.5(c).

SECTION 1.6 OPTION TO PURCHASE REMAINING SHARES. Each Seller hereby grants to
            the Purchaser an option to purchase all, but not less than all, of
            its remaining Shares it holds in the Company immediately prior to
            the Closing (collectively hereinafter referred to as the "Remaining
            Shares") pursuant to the terms and conditions set forth herein. At
            the Closing, each Seller shall have delivered Share Certificates
            representing the Remaining Shares, duly and properly chopped and
            endorsed for transfer to the Purchaser, which Share Certificates
            shall be deposited into escrow in accordance with Section 6.5 and
            the remainder to be held in escrow pending the Purchaser's exercise
            of Option.

            (a)   The Purchaser may exercise the Option any time before the date
                  eighteen (18) calendar months after the Closing Date (the
                  "Exercise Period") at its sole discretion, provided, however,
                  that the Purchaser shall provide to the Sellers'
                  Representative written notice of its intention to exercise the
                  Option five (5) business days prior to the Exercise Date, and
                  the Sellers' Representative shall so inform each Seller; and
                  the Purchaser must exercise the Option within the Exercise
                  Period upon the earliest of:

                  (i)   The date not later than sixty (60) days after the
                        Purchaser's receipt of an audited quarterly financial
                        report prepared by the Company Accountants showing that
                        the Company has positive or break-even operating income
                        for two (2) consecutive quarters in accordance with
                        R.O.C. GAAP; or

                  (ii)  When both of the following events have occurred: (A) the
                        Company has successfully been qualified by IBM for
                        production and (B) for two (2) consecutive calendar
                        months, 2.25x + y >= 8,000 wafers per month, where x
                        represents the number of twelve-inch wafers serviced by
                        the Company during one calendar month and y represents
                        the number of eight-inch wafers serviced by the Company
                        during one calendar month.

            (b)   The price per Share at which the Purchaser shall exercise the
                  Option (the "Exercise Price") shall be comprised of a price
                  per Share and an earn-out payment, both calculated as follows:

                  (i)   The price per Share component of the Exercise Price (the
                        "Exercise Price Per Share") shall be according to the
                        following chart:

                                                                             -3-





  Option Indebtedness of the
 Company at Time of Exercise
     (in Millions NTD)
- ----------------------------            Exercise Price Per Share
   Minimum        Maximum                        (NTD)
- --------------------------------------------------------------------------------
                        
      0            1,250                      11.75
- --------------------------------------------------------------------------------
 Over 1,250                            Reduction of NTD 0.37
                                           from NTD 11.75
                                      for every NTD 34 million
                              of Option Indebtedness above NTD 1,250,000,000
- --------------------------------------------------------------------------------


            and

                  (ii)  The earn-out component of the Exercise Price (the
                        "Exercise Earn-out") shall equal 14% of the Company's
                        EBTDA one (1) calendar year after the first day of the
                        next calendar month after the date the Purchaser
                        exercises the Option (the "Exercise Date").

            (c)   The Purchaser shall exercise the Option by providing notice in
                  writing to the Sellers' Representative of its intention to
                  exercise the Option not later than five (5) business days
                  prior to the Exercise Date and after the Purchaser has
                  obtained requisite foreign investment approval, and the
                  Sellers' Representative shall so inform each Seller.
                  Thereafter, the Sellers' Representative shall promptly use
                  Reasonable Efforts to take all necessary actions to allow the
                  Purchaser to complete its exercise of the Option.

            (d)   On the Exercise Date, after the Purchaser has taken possession
                  of the Share Certificates representing the Remaining Shares,
                  in accordance with the escrow arrangements mutually agreed
                  upon with the Escrow Agent, and has completed all necessary
                  share transfer procedures, the Purchaser shall authorize the
                  Escrow Agent to distribute the Exercise Price Per Share to the
                  Sellers, subject to withholdings and deductions specified
                  below.

            (e)   The Company Accountants shall calculate the Option
                  Indebtedness and resulting Exercise Price Per Share based on
                  the closing balance sheet of the month prior to the Exercise
                  Date (which balance sheet shall have been certified by the
                  Company Accountants). The Exercise Price Per Share shall be
                  payable to the Sellers on the Exercise Date, minus (A) any
                  Sellers' Transaction Fees associated with the Purchaser's
                  exercise of the Option, (B) the applicable securities
                  transaction tax payable in connection with the transfer of the
                  Remaining Shares, calculated on the Exercise Price Per Share
                  and the Purchaser's good faith estimate of the Exercise
                  Earn-out, and (C) tax liabilities incurred by the Company as a
                  result of any of the items listed in Section C.12(e), if any
                  (provided that with respect to any deductions for such tax
                  liabilities, the Parties have agreed that such deductions
                  shall be considered Damages subject to the Indemnification
                  Limit, but the Purchaser may make such deductions directly
                  without following the procedures specified in Article 6).

            (f)   The Company Accountants shall have thirty (30) days to
                  calculate and certify the Exercise Earn-out after the date one
                  year after the Exercise Date. The Exercise Earn-out shall be
                  paid to the Sellers not later than fifteen (15) calendar days
                  after the Company Accountants certify the calculation of the
                  Exercise Earn-out, at which time

                                                                             -4-



                  each Seller shall be paid its pro rata portion (based on the
                  number of Remaining Shares it sold to the Purchaser on the
                  Exercise Date) of the Exercise Earn-out (less (A) any Sellers'
                  Transaction Fees then applicable, (B) any withholdings in
                  accordance with applicable Legal Requirements and (C) tax
                  liabilities incurred by the Company as a result of any of the
                  items listed in Section C.12(e), if any (provided that with
                  respect to any deductions for such tax liabilities, the
                  Parties have agreed that such deductions shall be considered
                  Damages subject to the Indemnification Limit, but the
                  Purchaser may make such deductions directly without following
                  the procedures specified in Article 6)).

            (g)   In the event that the Purchaser does not exercise the Option
                  within the Option Period, the Purchaser shall cause the Escrow
                  Agent to release from escrow all the Share Certificates
                  representing the Remaining Shares back to the Sellers, who may
                  then cancel their endorsements for transfer on the back of
                  each Share Certificate; provided, however, that any Share
                  Certificates representing Remaining Shares held in escrow
                  pursuant to Section 6.5 shall remain in escrow subject to the
                  provisions of Section 6.5 until the date two (2) years from
                  the Closing Date.

                                   ARTICLE II
                          REPRESENTATION AND WARRANTIES

SECTION 2.1 REPRESENTATIONS AND WARRANTIES REGARDING THE COMPANY. The Company
            and the Sellers' make the representations and warranties regarding
            the Company set forth in Schedule C hereto, all of which are
            incorporated by reference herein and constitute part of this
            Agreement.

SECTION 2.2 REPRESENTATIONS AND WARRANTIES REGARDING THE SHARES. Each of the
            Sellers makes the representations and warranties regarding the
            Shares set forth in Schedule D hereto, all of which are incorporated
            herein by reference and constitute part of this Agreement.

SECTION 2.3 REPRESENTATIONS AND WARRANTIES REGARDING THE PURCHASER. The
            Purchaser makes the representations and warranties set forth in
            Schedule E hereto, all of which are incorporated herein by reference
            and constitute part of this Agreement.

                                   ARTICLE III
                       CONDITIONS PRECEDENT TO THE CLOSING

SECTION 3.1 CONDITIONS PRECEDENT TO THE PURCHASER'S OBLIGATION TO CLOSE. The
            obligations of the Purchaser to purchase the Shares and consummate
            the Basic Transaction are set forth in Schedule F hereto, all of
            which are incorporated herein by reference and constitute part of
            this Agreement, and the Company and the Sellers shall have complied
            with the pre-closing covenants set forth in Schedule I hereto, all
            of which are incorporated herein by reference and constitute part of
            this Agreement.

SECTION 3.2 CONDITIONS PRECEDENT TO THE COMPANY'S AND SELLER' OBLIGATION TO
            CLOSE. The obligations of the Company and the Sellers to sell the
            Shares and consummate the Basic Transaction are set forth in
            Schedule G hereto, all of which are incorporated herein by reference
            and constitute part of this Agreement.

                                                                             -5-



                                   ARTICLE IV
             POST-CLOSING AGREEMENTS OF THE SELLERS AND THE COMPANY

            The Company and the Sellers covenant and agree with the Purchaser
that, following the Closing of the Basic Transaction, the Company will comply
with all the covenants and agreements of this Article IV, except to the extent
(i) the Purchaser may otherwise consent in writing or (ii) otherwise required by
applicable Legal Requirements.

SECTION 4.1 ELECTION OF NEW DIRECTORS AND SUPERVISORS. Not later than the first
            (1st) business day after the Closing Date, the Chairman of the
            Company shall send a notice to each director of the Company to
            convene a Board of Directors meeting for the purpose of convening a
            meeting as of shareholders of the Company to re-elect the directors
            and supervisors of the Company in accordance with the Amended Joint
            Venture Agreement. Such notice shall have been prepared and approved
            by the Purchaser before the Closing Date.

SECTION 4.2 TRANSITION MATTERS. The Company and the Sellers who comprise of
            management of the Company shall, as soon as practicable after the
            Closing, cooperate with the Purchaser to complete all necessary
            amendments to the Company's registration and records with
            Governmental Bodies, changes to the signatures and chops used on the
            Company's bank accounts and any other transition matters deemed
            necessary by the Purchaser arising as a result of the Basic
            Transaction and the obligations set forth in the Amended Joint
            Venture Agreement, including authorizing the use of all necessary
            chops used by the Company immediately prior to the Closing.

                                    ARTICLE V
                                   TERMINATION

Section 5.1 TERMINATION EVENTS. This Agreement may be terminated at any time
            prior to Closing:

            (a)   by the Purchaser, the Sellers' Representative and the Company
                  by mutual written consent at any time prior to the Closing;

            (b)   by the Purchaser, the Sellers' Representative or the Company
                  if the Closing shall not have been consummated on or before
                  July 2, 2004 (U.S. west coast time); provided, however, that
                  if a Force Majeur prevents the Parties from holding the
                  Closing by such date, this date shall be automatically
                  extended by ten (10) days;

            (c)   by the Company, the Sellers' Representative or the Purchaser
                  if there shall be any law or regulation that makes
                  consummation of the Basic Transaction or the exercise of the
                  Option illegal or otherwise prohibited or if consummation of
                  the Basic Transaction or the exercise of the Option would
                  violate any nonappealable final order, decree or judgment of
                  any court or governmental body having competent jurisdiction;

            (d)   by the Purchaser by giving written notice to the Company at
                  any time prior to the Closing (i) in the event the Company has
                  breached any representation, warranty, or covenant contained
                  in this Agreement in any material respect, the Purchaser has
                  notified the Company of the breach, and the breach has
                  continued without cure for a period of thirty (30) days after
                  the notice of breach or (ii) if events occur which render
                  impossible compliance with one or more conditions set forth in
                  Schedule F and such conditions are not waived by the
                  Purchaser; provided that such events did not result from any
                  action or omission by the Purchaser which was within its
                  control and which

                                                                             -6-



                  the Purchaser was not expressly permitted to take or omit by
                  the terms of this Agreement; and

            (e)   by the Company by giving written notice to the Purchaser at
                  any time prior to the Closing (i) in the event the Purchaser
                  has breached any representation, warranty, or covenant
                  contained in this Agreement in any material respect, the
                  Company has notified the Purchaser of the breach, and the
                  breach has continued without cure for a period of (thirty) 30
                  days after the notice of breach or (ii) if events occur which
                  render impossible compliance with one or more conditions set
                  forth in Schedule G, and such conditions are not waived by the
                  Company; provided that such events did not result from any
                  action or omission by the Company which was within the control
                  of the Company and which the Company was not expressly
                  permitted to take or omit by the terms of this Agreement.

Section 5.2 EFFECT OF TERMINATION. Each Party's right of termination under
            Section 5.1 is in addition to any other rights it may have under
            this Agreement or otherwise, and the exercise of a right of
            termination will not be an election of remedies. If this Agreement
            is terminated pursuant to Section 5.1, all further obligations of
            the Parties under this Agreement will terminate, except that the
            obligations in Section H.3 will survive; provided, however, that if
            this Agreement is terminated by a party because of the Breach of
            this Agreement by the other party or because one or more of the
            conditions to the terminating party's obligations under this
            Agreement is not satisfied as a result of the other party's failure
            to comply with its obligations under this Agreement, the terminating
            party's right to pursue all legal remedies will survive such
            termination unimpaired.

                                   ARTICLE VI
                            INDEMNIFICATION; REMEDIES

Section 6.1 SURVIVAL; RIGHT TO INDEMNIFICATION. The representations, warranties,
            covenants, and obligations of the Company and the Sellers in this
            Agreement, the Company Disclosure Schedule, the Sellers' Disclosure
            Schedule, the supplements to the Company Disclosure Schedule and the
            Sellers' Disclosure Schedule and any other certificate or document
            delivered by the Company and the Sellers pursuant to this Agreement
            will survive the Closing. The Purchaser's right to indemnification,
            payment of Damages or other remedy based on such representations,
            warranties, covenants, and obligations shall be limited to the
            extent that the Purchaser had any Actual Knowledge prior to the
            execution and delivery of this Agreement or the Closing Date, with
            respect to the accuracy or inaccuracy of or compliance with, any
            such representation, warranty, covenant, or obligation. The written
            waiver by the Purchaser of any condition based on the accuracy of
            any representation or warranty, or on the performance of or
            compliance with any covenant or obligation, will be deemed to limit
            the Purchaser's right to indemnification, payment of Damages, or
            other remedy based on the specific representations, warranties,
            covenants, and obligations so waived.

Section 6.2 INDEMNIFICATION AND PAYMENT OF DAMAGES BY THE SELLERS. The Sellers
            will, jointly and severally, indemnify and hold harmless the
            Purchaser and its Representatives, stockholders, controlling
            persons, and affiliates (collectively, the "Indemnified Persons")
            for, and will pay to the Indemnified Persons the amount of, any
            loss, liability, claim, damage (including incidental and
            consequential damages), expense (including costs of investigation
            and defense and reasonable attorneys' fees) or diminution of value,
            whether or not involving a

                                                                             -7-



            third-party claim (collectively, "Damages") (to the extent that the
            Company's existing insurance policies do not cover such Damages),
            arising, directly or indirectly, from or in connection with:

            (a)   any Breach of any representation or warranty or covenant or
                  obligation made by the Company or the Sellers in this
                  Agreement, the Company Disclosure Schedule, or any other
                  certificate or document delivered by the Company pursuant to
                  this Agreement, except as specifically covered in subsections
                  (b), (c) and (d) below;

            (b)   any Tax in excess of amounts accrued on the Balance Sheet or
                  disclosed in Section C.12(a) of the Company Disclosure
                  Schedule (without giving effect to any supplement to the
                  Company Disclosure Schedule), any and all liabilities,
                  interest and penalties resulting from Tax matters arising
                  before the Closing Date and any breach of the representation
                  and warranty set forth in Section C.12;

            (c)   any claim brought against the Company or the Purchaser arising
                  in connection with the operations of the Company prior to the
                  Closing Date, including but not limited to the matters covered
                  by Sections C.8, C.11, C.14, C.15, C.16, C.17, C.18, C.20,
                  C.21 and C.25;

            (d)   any claim by any Person for brokerage or finder's fees or
                  commissions or similar payments other than as provided in
                  Section C.23 of the Company Disclosure Schedule based upon any
                  agreement or understanding alleged to have been made by any
                  such Person with the Company (or any Person acting on their
                  behalf) in connection with the Basic Transaction.

            The remedies provided in this Section 6.2 will not be exclusive of
            or limit any other remedies that may be available to the Purchaser
            or the other Indemnified Persons.

Section 6.3 INDEMNIFICATION AND PAYMENT OF DAMAGES BY THE PURCHASER. The
            Purchaser will indemnify and hold harmless the Sellers, and will pay
            to the Sellers the amount of any Damages arising, directly or
            indirectly, from or in connection with (a) any Breach of any
            representation or warranty made by the Purchaser in this Agreement
            or in any certificate delivered by the Purchaser pursuant to this
            Agreement, (b) any Breach by the Purchaser of any covenant or
            obligation of the Purchaser in this Agreement, or (c) any claim by
            any Person for brokerage or finder's fees or commissions or similar
            payments based upon any agreement or understanding alleged to have
            been made by such Person with the Purchaser (or any Person acting on
            its behalf) in connection with the Basic Transaction.

            The remedies provided in this Section 6.3 will not be exclusive of
            or limit any other remedies that may be available to the Sellers.

SECTION 6.4 TIME LIMITATIONS.

            (a)   If the Closing occurs, in order for the Sellers to have any
                  liability (for indemnification or otherwise) with respect to
                  any representation or warranty, or covenant or obligation to
                  be performed and complied with prior to the Closing Date
                  (excepting those in Sections C.3, C.4, C.7 and C.14), the
                  Purchaser must notify the Company of a claim specifying the
                  factual basis of that claim in reasonable detail to the extent
                  then known by the Purchaser on or before the following
                  limitations periods (each, a "Time Limitation Period"):

                                                                             -8-



                  (i)   With respect to claims under Section 6.2(a), not later
                        than one (1) year after the Closing Date;

                  (ii)  With respect to claims under Section 6.2(b), not later
                        than last day of that a Governmental Body may pursue the
                        Company for such matters under applicable Legal
                        Requirements;

                  (iii) With respect to claims under Section 6.2(c), not later
                        than two (2) years after the Closing Date; and

                  (iv)  With respect to claims under Section 6.2(d), not later
                        than six (6) months after the Closing Date.

            (b)   There shall be no such notification requirement as to any
                  claim with respect to Sections C.3, C.4, C.7 and C.14, or as
                  to any claim for indemnification or reimbursement based on a
                  covenant or agreement to be performed by the Company after the
                  Closing Date.

            (c)   If the Closing occurs, in order for the Purchaser to have any
                  liability (for indemnification or otherwise) with respect to
                  any representation or warranty, or covenant or obligation to
                  be performed and complied with prior to the Closing Date, the
                  Sellers must notify the Purchaser of a claim specifying the
                  factual basis of the claim in reasonable detail to the extent
                  then known by the Sellers on or before the first (1st)
                  anniversary following the Closing Date, with respect to claims
                  under Sections 6.3(a) and 6.3(b), and on or before the date
                  six (6) months from the Closing Date, with respect to claims
                  under Section 6.3(c).

SECTION 6.5 LIMITATION ON AMOUNT; ESCROW OF PORTION OF REMAINING SHARES.

            (a)   The indemnifying party will have no liability (for
                  indemnification or otherwise) with respect to the matters
                  described in this Article VI until the total of all Damages
                  with respect to such matters exceeds NT$15,000,000 (the
                  "Indemnification Basket"), and then only for the amount by
                  which such Damages exceed the Indemnification Basket. However,
                  the Indemnification Basket will not apply to (i) any Breach of
                  the indemnifying persons' representations and warranties of
                  which either the indemnifying person had Actual Knowledge at
                  any time prior to the date on which such representation or
                  warranty is made, (ii) any intentional Breach by the
                  indemnifying party of any covenant or obligation, or (iii) a
                  breach of the representations and warranties contained in
                  Section C.12(e), and in such cases, the party seeking
                  indemnification may seek indemnification without satisfying
                  the Indemnification Basket.

            (b)   In no event shall the indemnifying party's aggregate total
                  liability (for indemnification or otherwise) under this
                  Section 6 exceed US$7 million (the "Indemnification Limit").
                  Each Seller agrees to allow the Purchaser to deposit a number
                  of Share Certificates representing his/her/its Remaining
                  Shares equal to such Seller's pro rata portion of the total
                  number of Shares equal to the Indemnification Limit
                  (calculated using the Purchase Price as defined in Section 1.3
                  hereof as the value of such Remaining Shares) into an escrow
                  account designated by the Purchaser and agreed by the Sellers
                  pursuant to Section F6 to be used to pay any Damages to which
                  the Indemnified Persons may be entitled under this Article 6.
                  Such Share Certificates shall remain in the escrow account
                  until the date two (2) years from the Closing Date. In the
                  event that the Purchaser exercises the Option prior to such
                  date, the Sellers agree that the Purchaser

                                                                             -9-



                  may withhold from the Exercise Price an amount equal to the
                  Indemnification Limit to be deposited into an escrow account
                  until the date two (2) years from the Closing Date. In the
                  event that any Damages are to be deducted from the Remaining
                  Shares or the withheld Exercise Price, they shall be deducted
                  from each Seller pro rata (and in the case of Share
                  Certificates, as close to pro rata as reasonably possible).

            (c)   In the event that the Purchaser does not exercise the Option
                  within the Option Period, the Purchaser shall cause the Escrow
                  Agent to release from escrow all the Share Certificates
                  representing the Remaining Shares back to the Sellers, who may
                  then cancel their endorsements for transfer on the back of
                  each Share Certificate; provided, however, that any Share
                  Certificates representing Remaining Shares held in escrow for
                  purpose of securing the Indemnification Limit pursuant to
                  Section 6.5(b) shall remain in escrow subject to the
                  provisions of Section 6.5(b) until the date two (2) years from
                  the Closing Date.

            (d)   After the date two (2) years from the Closing Date, if there
                  are any Share Certificates remaining in said escrow account
                  (or any portion of the withheld Exercise Price remaining in
                  said escrow account), they will be returned to the Sellers;
                  provided, however, that if the date two (2) years from the
                  Closing Date has past and there is still an amount of Damages
                  that is the subject of an indemnification claim that has not
                  yet been conclusively resolved, none of the Share Certificates
                  (or no portion of the withheld Exercise Price) shall be
                  returned until the Purchaser is satisfied that all
                  indemnification claims have been paid and any disputes with
                  respect thereto have been conclusively resolved.

SECTION 6.6 PROCEDURE FOR INDEMNIFICATION-THIRD PARTY CLAIMS. Subject to the
            provisions of Sections 6.4 and 6.5 hereof:

            (a)   Promptly after receipt by an indemnified party under Section
                  6.2 or 6.3 of notice of the commencement of any Proceeding
                  against it by a third party, such indemnified party will, if a
                  claim is to be made against an indemnifying party under such
                  Section, give notice to the indemnifying party of the
                  commencement of such claim, but the failure to notify the
                  indemnifying party will not relieve the indemnifying party of
                  any liability that it may have to any indemnified party,
                  except to the extent that the indemnifying party demonstrates
                  that the defense of such action is prejudiced by the
                  indemnifying party's failure to give such notice; provided,
                  however, that if the indemnified party intentionally failed to
                  give such notice, the indemnifying party will be deemed to
                  have been prejudiced by the amount of attorneys' fees incurred
                  with respect thereto through the date notice is received by
                  the indemnifying party and the indemnifying party will not be
                  required to indemnify the indemnified party for such
                  attorneys' fees.

            (b)   If any Proceeding referred to in Section 6.6(a) is brought
                  against an indemnified party and it gives notice to the
                  indemnifying party of the commencement of such Proceeding, the
                  indemnifying party will be entitled to participate in such
                  Proceeding and, to the extent that it wishes (unless (i) the
                  indemnifying party is also a party to such Proceeding and the
                  indemnified party determines in good faith that joint
                  representation would be inappropriate, or (ii) the
                  indemnifying party fails to provide reasonable assurance to
                  the indemnified party of its financial capacity to defend such
                  Proceeding and provide indemnification with respect to such
                  Proceeding), to assume the defense of such Proceeding with
                  counsel reasonably satisfactory to the indemnified party and,
                  after notice from the indemnifying party to the indemnified
                  party of its election to assume

                                                                            -10-



                  the defense of such Proceeding, the indemnifying party will
                  not, as long as it diligently conducts such defense, be liable
                  to the indemnified party under this Article VI for any fees of
                  other counsel or any other expenses with respect to the
                  defense of such Proceeding, in each case subsequently incurred
                  by the indemnified party in connection with the defense of
                  such Proceeding, other than reasonable costs of investigation
                  and monitoring of defense of such Proceeding. If the
                  indemnifying party assumes the defense of a Proceeding, (i) it
                  will be conclusively established for purposes of this
                  Agreement that the claims made in that Proceeding are within
                  the scope of and subject to indemnification; (ii) no
                  compromise or settlement of such claims may be effected by the
                  indemnifying party without the indemnified party's consent
                  unless (A) there is no finding or admission of any violation
                  of Legal Requirements or any violation of the rights of any
                  Person and no effect on any other claims that may be made
                  against the indemnified party, and (B) the sole relief
                  provided is monetary damages that are paid in full by the
                  indemnifying party; and (iii) the indemnified party will have
                  no liability with respect to any compromise or settlement of
                  such claims effected without its consent. If notice is given
                  to an indemnifying party of the commencement of any Proceeding
                  and the indemnifying party does not, within ten (10) days
                  after the indemnified party's notice is given, give notice to
                  the indemnified party of its election to assume the defense of
                  such Proceeding, the indemnifying party will be bound by any
                  determination made in such Proceeding or any compromise or
                  settlement effected by the indemnified party.

            (c)   Notwithstanding the foregoing, if an indemnified party
                  determines in good faith that there is a reasonable
                  probability that a Proceeding may adversely affect it or its
                  Affiliates other than as a result of monetary damages for
                  which it would be entitled to indemnification under this
                  Agreement, the indemnified party may, by notice to the
                  indemnifying party, assume the exclusive right to defend,
                  compromise, or settle such Proceeding, but the indemnifying
                  party will not be bound by any determination of a Proceeding
                  so defended or any compromise or settlement effected without
                  its consent (which may not be unreasonably withheld).

            (d)   The Sellers hereby consent to the non-exclusive jurisdiction
                  of any court in which a Proceeding is brought against any
                  Indemnified Person for purposes of any claim that an
                  Indemnified Person may have under this Agreement with respect
                  to such Proceeding or the matters alleged therein, and agrees
                  that process may be served on it with respect to such a claim
                  anywhere in the world.

            (e)   After such a Proceeding brought by a third party has concluded
                  and one Party seeks to claim indemnification from the other
                  Party, the Party seeking indemnification shall notify the
                  other Party of the claim in writing. After the notice is
                  given, the Parties shall discuss in good faith or otherwise
                  resolve the claim. If after thirty (30) days, the Parties are
                  not able to resolve the claim, either Party may submit the
                  claim for final and binding arbitration pursuant to Section
                  H.5. Where the Purchaser is the Party seeking indemnification,
                  if the Parties reach a resolution or the Purchaser prevails in
                  arbitration, the Purchaser shall be entitled to satisfy its
                  claim for Damages from the Share Certificates representing
                  Remaining Shares (calculated using the Purchase Price as the
                  value of such Remaining Shares), or the withheld Exercise
                  Price, in accordance with Section 6.5 by taking possession of
                  the appropriate number of Share Certificates representing
                  Remaining Shares or cash from the withheld Exercise Price, as
                  the case may be. If the Sellers are the Party seeking
                  indemnification, if the Parties reach a resolution or the
                  Sellers prevail in arbitration, the Sellers shall be entitled
                  to satisfy

                                                                            -11-



                  their claim for Damages as agreed by the Parties or as decided
                  by the Tribunal, as the case may be.

Section 6.7 PROCEDURE FOR INDEMNIFICATION-OTHER CLAIMS. A claim for
            indemnification for any matter not involving a third-party claim may
            be asserted by notice to the Party from whom indemnification is
            sought. The notice must specify the factual basis of the claim in
            reasonable detail to the extent known by the Party seeking
            indemnification. After the notice is given, the Parties shall
            discuss in good faith or otherwise resolve the claim. If after
            thirty (30) days, the Parties are not able to resolve the claim,
            either Party may submit the claim for final and binding arbitration
            pursuant to Section H.5. Where the Purchaser is the Party seeking
            indemnification, if the Parties reach a resolution or the Purchaser
            prevails in arbitration, the Purchaser shall be entitled to satisfy
            its claim for Damages from the Share Certificates representing
            Remaining Shares (calculated using the Purchase Price as the value
            of such Remaining Shares), or the withheld Exercise Price, in
            accordance with Section 6.5 by taking possession of the appropriate
            number of Share Certificates representing Remaining Shares or cash
            from the withheld Exercise Price, as the case may be. If the Sellers
            are the Party seeking indemnification, if the Parties reach a
            resolution or the Sellers prevail in arbitration, the Sellers shall
            be entitled to satisfy their claim for Damages as agreed by the
            Parties or as decided by the Tribunal, as the case may be.

                                   ARTICLE VII
                               GENERAL PROVISIONS

SECTION 7.1 GENERAL PROVISIONS. The general provisions set forth in Schedule G
            hereto are incorporated herein by reference and constitute part of
            this Agreement

               [REMAINDER OF THIS PAGE INTENTIONALLY LEFT BLANK.]

                                                                            -12-



      IN WITNESS WHEREOF, the Parties have executed and delivered this Stock
Purchase Agreement as of the date first written above.

                                        COMPANY:
                                        UNITIVE SEMICONDUCTOR TAIWAN CORPORATION

                                        By: /s/ Ray C. Chang 6/3 2004
                                            -----------------------------------
                                            Name: Ray C. Chang
                                            Its: Chairman

                                        PURCHASER:
                                        AMKOR TECHNOLOGY, INC.

                                        By: /s/ O.  Khaykin
                                            ------------------------------------
                                            Name: Oleg Khaykin
                                            Its: Executive Vice President

                                        SELLERS' REPRESENTATIVES
                                        ON BEHALF OF EACH SELLER:

                                        By: /s/ Ray C. Chang
                                            ------------------------------------
                                            Name: Ray. C. Chang
                                            Their: Attorney-in-fact

                                        By: /s/ Daniel Teng 6/3/04
                                            ------------------------------------
                                            Name: Daniel Teng
                                            Their: Attorney-in-fact

                                                                            -13-

                                   SCHEDULE B

                                   DEFINITIONS

      For purposes of this Agreement, the following terms have the meanings
specified or referred to in this Schedule B:

      "Affiliate" shall mean a Person that directly, or indirectly, through one
or more intermediaries, controls or is controlled by, or is under common control
with any Person or Persons.

      "Actual Knowledge" shall mean with respect to a particular fact or matter,
(a) in the case of an individual, that such individual is actually aware of such
fact or matter; or, (b) in the case of a Person that is not an individual, that
an individual who is serving, or who has at any time served, as a director,
officer or partner of such Person (or in any similar capacity), or as an
employee having responsibility for such facts or matters, has, or at any time
had, actual knowledge of such fact or matter.

      "Amended Joint Venture Agreement" shall mean the Amended Joint Venture
Agreement in a form attached hereto as Exhibit A to be executed and delivered by
the Company, the Sellers, other Company shareholders (as required) and the
Purchaser pursuant to the terms of this Agreement, which amends the Original
Joint Venture Agreement entered into in April 2002 by and among the Company and
certain Stockholders.

      "Applicable Contract" shall mean any material Contract (a) by which the
Company or any Company Subsidiary has or may acquire any rights, (b) by which
the Company or any Company Subsidiary has or may become subject to any
obligation or liability, or (c) by which the Company or any Company Subsidiary
or any of the properties or assets owned or used by them is or may become bound.

      "Balance Sheet" shall mean the audited balance sheet of the Company for
the year ended December 31, 2003 included in the Financial Statements.

      "Basic Transaction" shall have the meaning set forth in Section 1.2.

      "Breach" shall mean a breach of a representation, warranty, covenant,
obligation, or other provision of this Agreement or any written instrument
delivered pursuant to this Agreement, which breach will be deemed to have
occurred if there is or has been (a) any inaccuracy in or breach of, or any
failure to perform or comply with, such representation, warranty, covenant,
obligation, or other written provision, or (b) any claim (by any Person) or
other occurrence or circumstance that is or was inconsistent with such
representation, warranty, covenant, obligation, or other written provision.

      "Cash Payment" has the meaning set forth in Section 1.5(b)(i).

      "Closing" has the meaning set forth in Section 1.4.

      "Closing Date" shall mean the date and time as of which the Closing
actually takes place.

      "Company" has the meaning set forth in the first paragraph of this
Agreement.

                                                                            -14-


      "Company Closing Documents" has the meaning set forth in Section C.2(a).

      "Company Disclosure Schedule" shall mean the disclosure schedule delivered
by the Company to the Purchaser concurrently with the execution and delivery of
this Agreement.

      "Company Securities" has the meaning set forth in Section C.3(b).

      "Company Subsidiary" shall mean all Subsidiaries of the Company in
existence as of the date of this Agreement or subsequently organized.

      "Company's Accountants" shall mean PricewaterhouseCoopers or such other
firm of independent public accountants appointed by the Purchaser.

      "Consent" shall mean any approval, consent, ratification, waiver, or other
authorization (including any Governmental Authorization).

      "Contract" shall mean any agreement, contract, lease, license, instrument,
obligation, promise, undertaking or other arrangement (whether written or oral
and whether express or implied) that is legally binding and any amendment,
supplement and modification (whether written or oral) thereto.

      "Damages" shall have the meaning set forth in Section 6.2.

      "Earn-out" shall have the meaning set forth in Section 1.6(f).

      "EBTDA" shall mean the Company's earnings (after interest) before income
taxes with depreciation added for assets of the Company. Any assets financed,
consigned or otherwise provided to the Company by the Purchaser after the
Closing Date shall be treated as expense in accordance with ROC GAAP, and such
expense shall be equal or equivalent to the depreciation incurred by any of such
assets purchased or financed by the Purchaser or its Affiliate after the Closing
Date. Such expense, unless classified as depreciation expense, will be a
reduction of EBTDA. For the avoidance of doubt, depreciation for assets
purchased or financed by the Purchaser shall not be included in the depreciation
added back to the Company's earnings (after interest) before income taxes to
arrive at EBTDA.

      "Encumbrance" shall mean any charge, claim, condition, equitable interest,
lien, option, pledge, security interest, right of first refusal, or restriction
of any kind, including any restriction on use, transfer, receipt of income, or
exercise of any other attribute of ownership.

      "Environmental, Health and Safety Requirements" shall mean all applicable
Legal Requirements and all contractual obligations concerning public health and
safety, worker health and safety, and pollution or protection of the
environment, including without limitation all those relating to the presence,
use, production, generation, handling, transportation, treatment, storage,
disposal, distribution, labeling, testing, processing, discharge, release,
threatened release, control, or cleanup of any hazardous materials, substances
or wastes, chemical substances or mixtures, pesticides, pollutants,
contaminants, toxic chemicals, petroleum products or byproducts, asbestos,
polychlorinated biphenyls, noise or radiation, each as amended and as now or
hereafter in effect.

      "Escrow Agent" shall mean the escrow agent engaged by the Purchaser to
facilitate the escrow arrangements with respect to the Purchase Price set aside
for shareholders of the Company who have not become Sellers as of the Closing
Date, the Share Certificates

                                                                           -15-


representing the Remaining Shares, the Share Certificates (or cash) held in
accordance with Section 6.5, and the distribution to the Sellers of the proceeds
of the Basic Transaction and the Purchaser's exercise of the Option.

      "Escrow Fees and Expenses" shall have the meaning set forth in Section
F.6.

      "Exercise Date" shall have the meaning set forth in Section 1.6(b).

      "Exercise Earn-out" shall have the meaning set forth in Section 1.6(b).

      "Exercise Price" shall have the meaning set forth in Section 1.6(b).

      "Exercise Price Per Share" shall have the meaning set forth in Section
1.6(b).

      "Financial Information" shall mean collectively the Financial Statements,
Selected Financial Information, and Most Recent Financial Information.

      "Financial Statements" shall mean the audited non-consolidated financial
statements of the Company as at and for the years ended December 31, 2002 and
2003, together with reports on such year-end statements by the Company's
Accountants, including in each case a balance sheet, statements of income and
cash flows and changes in stockholders' equity and accompanying notes.

      "Force Majeur" shall mean a cause beyond the reasonable control of either
Party, including, without limitation, acts of God, war, civil disturbance,
earthquake, epidemic and failure of public utilities or common carriers.

      "Governmental Authorization" shall mean any Consent, license, permit or
other authorization issued, granted, given, or otherwise made available by or
under the authority of any Governmental Body or pursuant to any Legal
Requirement.

      "Governmental Body" shall mean any:

      (a)   nation, county, state, city, district, or other jurisdiction of any
            nature;

      (b)   national, state, local, municipal, foreign, or other government;

      (c)   governmental or quasi-governmental authority of any nature
            (including any governmental agency, branch, department, board,
            commission official, or other entity and any court or other
            tribunal);

      (d)   body exercising, or entitled to exercise, any administrative,
            executive, judicial, legislative, police, regulatory, or taxing
            authority or power of any nature.

      "Inception Date" shall mean June 30, 1999, the date the company license
was issued to the Company.

      "Indebtedness" shall mean as applied to any Person: (i) all obligations of
that Person to repay or pay money borrowed from another Person or the deferred
portion of the purchase price of services or assets; (ii) all obligations of
that Person under bankers acceptances or letters of credit; (iii) obligations of
others which that Person has directly or indirectly guaranteed, endorsed
(otherwise than for collection or deposit in the Ordinary Course of Business),
discounted or sold with recourse or agreed (contingently or otherwise) to
purchase or repurchase or otherwise acquire, or in respect of which that Person
has agreed to supply or advance funds (whether by

                                                                            -16-


way of loan, stock purchase, capital contribution or otherwise) or otherwise to
become directly or indirectly liable; (iv) all obligations evidenced or secured
by any mortgage, pledge, lien or conditional sale or other title retention
agreement to which any property or asset owned or held by that Person is
subject, whether or not the obligation evidenced or secured thereby shall have
been assumed; and (v) all other items (except items of capital stock, capital
surplus, general contingency reserves, deferred income taxes, retained earnings
and amounts attributable to minority interest, if any) which in accordance with
ROC GAAP would be included in determining total liabilities as shown on the
liability side of a balance sheet of that Person as of the date Indebtedness is
to be determined, including obligations of that Person properly treated as
capital lease obligations or their equivalent under ROC GAAP.

      "Indemnification Basket" has the meaning set forth in Section 6.5.

      "Indemnification Limit" has the meaning set forth in Section 6.5.

      "Indemnified Persons" has the meaning set forth in Section 6.2.

      "Intellectual Property" shall mean all trademarks, patents, tradenames,
material trade secrets, material copyrights, domain names, service marks,
licenses, all registrations and applications for any of the foregoing, and other
intellectual property and proprietary rights and know-how (whether or not
subject to statutory registration or protection) owned or used by the Company or
in which the Company has an interest (whether licensed to or by the Company).

      "Legal Requirement" shall mean all applicable provisions of all (i)
constitutions, treaties, statutes, laws, codes, rules, regulations, ordinances
or orders of any Governmental Body and (ii) orders, decisions, injunctions,
judgments, awards and decrees of or agreements with any Governmental Body.

      "Minute Books" shall mean the record of actions taken by the Company's
shareholders and board of directors.

      "Most Recent Financial Information" shall mean the financial information
of the Company for the three-month period ended March 31, 2004 prepared and
reviewed by the Company's Accountants, including, selected profit and loss
information items (through earnings before interest, depreciation, taxes and
amortization) and selected balance sheet items.

      "Most Recent Month End" shall mean the month ended in the Most Recent
Financial Information.

      "NTD" or "NT$" shall mean New Taiwan Dollars, the official currency of the
ROC.

      "Option" shall have the meaning set forth in Section 1.6.

      "Option Indebtedness" shall mean Indebtedness incurred by the Company
during the Exercise Period (based on the closing balance sheet of the month
prior to the Exercise Date (certified by the Company Accountants), expressly
including (a) the Company's existing Indebtedness as of the date of Closing, (b)
payments for twelve-inch (12") wafer equipment installed at the Company's
premises which have not yet been paid as of the date of Closing (approximately
NT$420 million), and (c) loans from the Purchaser or an Affiliate of the
Purchaser used by the Company for working capital requirements, but excluding
(x) future capital expansion investments made by the Purchaser or an Affiliate
of the Purchaser, the depreciation of which is charged to the Purchaser or an
Affiliate of the Purchaser and (y) loans

                                                                            -17-


incurred by the Company at the Purchaser's request to finance equipment, and
deducting (z) the current assets of the Company reflected on such closing
balance sheet (but excluding from current assets any cash on hand in connection
with loans excluded pursuant to (x) and (y) or a capital contribution by the
Purchaser).

      "Order" shall mean any award, decision, injunction, judgment, order,
ruling, subpoena, or verdict entered, issued, made, or rendered by any court,
administrative agency, or other Governmental Body or by any arbitrator.

      "Ordinary Course of Business" shall mean an action taken by a Person that
is:

      (a)   consistent with the past practices of such Person and is taken in
            the ordinary course of the normal day-to-day operations of such
            Person;

      (b)   not required to be authorized by the shareholders or board of
            directors of such Person (or by any Person or group of Persons
            exercising similar authority) and is not required to be specifically
            authorized by the parent company (if any) of such Person; and

      (c)   similar in nature and magnitude to actions customarily taken,
            without any authorization by the board of directors (or by any
            Person or group of Persons exercising similar authority), in the
            ordinary course of the normal day-to-day operations of other Persons
            that are in the same line of business as such Person.

      "Organizational Documents" shall mean as to a Person (a) its certificate,
memorandum or articles of association or incorporation, by-laws or other
analogous documents adopted or filed in connection with the creation, formation
or organization of a Person, and (b) any amendment thereto.

      "Original Joint Venture Agreement" shall mean the Joint Venture Agreement
dated as of June 15, 1999 by and among the Company and certain shareholders of
the Company.

      "Party" and "Parties" has the meaning set forth in the first paragraph of
this Agreement.

      "Person" shall mean any individual, corporation, general or limited
partnership, limited liability company, joint venture, estate, trust,
association, organization, labor union, or other entity or Governmental Body.

      "Proceeding" shall mean any action, arbitration, audit, hearing,
investigation, litigation, or suit (whether civil, criminal, administrative,
investigative, or informal) commenced, brought, conducted, or heard by or
before, or otherwise involving, any Governmental Body or arbitrator.

      "Purchaser" has the meaning set forth in the first paragraph of this
Agreement.

      "Purchaser Closing Documents" has the meaning set forth in Section E.2(a).

      "Purchaser Disclosure Schedule" shall mean the disclosure schedule
delivered by Purchaser to the Company concurrently with the execution and
delivery of this Agreement.

      "Reasonable Efforts" shall mean the efforts that a reasonable Person
desirous of achieving a result would use in similar circumstances to ensure that
such result is achieved as expeditiously as reasonably possible.

                                                                            -18-


      "Reasonable Knowledge" shall mean with respect to a particular fact or
matter, (a) in the case of an individual, that a reasonable individual should
have or should have had Actual Knowledge of such fact or matter or could be
expected to discover or otherwise become aware of such fact or other matter in
the course of conducting a reasonable inquiry concerning the existence of such
fact or other matter, or (b) in the case of a Person that is not an individual,
that a reasonable individual who is serving, or who has at any time served, as a
director, officer or partner of such Person (or in any similar capacity), or as
an employee having responsibility for such facts or matters should have or
should have had Actual Knowledge of such fact or matter or could be expected to
discover or otherwise become aware of such fact or other matter in the course of
conducting a reasonable inquiry concerning the existence of such fact or other
matter

      "Related Person" shall mean a director, Supervisor, Officers, employee or
shareholder, or an Affiliate of the foregoing.

      "Remaining Shares" shall have the meaning set forth in Section 1.6.

      "Representative" shall mean with respect to a particular Person, any
director, officer, employee, agent, consultant, advisor, or other representative
of such Person, including legal counsel, accountants, and financial advisors.

      "ROC" shall mean the Republic of China or Taiwan.

      "ROC Company Law" shall mean the Company Law of the Republic of China.

      "ROC GAAP" shall mean generally accepted ROC accounting principles,
applied on a consistent basis.

      "Seller POA" shall mean the duly and properly executed or chopped power of
attorney authorizing the Sellers' Representative to act on behalf of each Seller
in all aspects with respect to the Basic Transaction, the sale of his/her/its
Remaining Shares to the Purchaser in connection with the Purchaser's exercise of
the Option and otherwise with respect to the transactions contemplated by this
Agreement in the form approved by the Purchaser's counsel.

      "Sellers" has the meaning set forth in the first paragraph of this
Agreement.

      "Sellers Closing Documents" has the meaning set forth in Section D.2.

      "Sellers Disclosure Schedule" shall mean the disclosure schedule delivered
by the Sellers to the Purchaser concurrently with the execution and delivery of
this Agreement.

      "Sellers' Representative" has the meaning set forth in the first paragraph
of this Agreement.

      "Sellers' Transaction Fees" shall mean all advisory, legal and consulting
fees incurred by the Company and the Sellers in connection with the negotiation
of this Agreement, the consummation of the Basic Transaction and the Purchaser's
exercise of the Option which were not paid before the Closing or the closing of
the exercise of the Option, all of which have been notified to the Purchaser in
writing not later than three (3) days prior to the Closing Date or prior to the
Closing of the Purchaser's exercise of the Option, and the fees of the Escrow
Agent and expenses associated with the escrow arrangements that exceed
US$25,000.

                                                                            -19-


      "Selected Financial Information" shall mean the following selected
financial information prepared and reviewed by the Company's Accountants (i) the
unaudited pro forma consolidated profit and loss statement of the Company for
the year ended December 31, 2003 and (ii) the unaudited combined balance sheet
for the Company at December 31, 2003 and delivered to Purchaser by the Company.

      "Share Certificates" shall mean official certificates issued by the
Company representing the Shares.

      "Shares" has the meaning set forth in the Recitals of this Agreement.

      "Subsidiary" shall mean with respect to any Person (the "Owner"), any
corporation or other Person of which securities or other interests having the
power to elect a majority of that corporation's or other Person's board of
directors or similar governing body, or otherwise having the power to direct the
business and policies of that corporation or other Person are held by the Owner
or one or more of its Subsidiaries or Affiliates.

      "Tax" shall mean any tax (including, but not limited to, any income tax,
capital gains tax, value-added tax, sales or use tax, employment tax, excise
tax, gross receipts tax, property tax, gift tax, or estate tax), levy,
assessment, tariff, duty (including any customs duty), deficiency, or other fee,
and any related charge or amount (including any fine, penalty, interest, or
addition to tax), imposed, assessed, or collected by or under the authority of
any Governmental Body or payable pursuant to any tax-sharing agreement or any
other Contract relating to the sharing or payment of any such tax, levy,
assessment, tariff, duty, deficiency, or fee.

      "Tax Return" shall mean any return (including any information return),
report, statement, schedule, notice, form, or other document or information
filed with or submitted to, or required to be filed with or submitted to, any
Governmental Body in connection with the determination, assessment, collection,
or payment of any Tax or in connection with the administration, implementation,
or enforcement of or compliance with any Legal Requirement relating to any Tax.

      "Time Limitation Period" has the meaning set forth in Section 6.4.

      "Trade Secrets" shall mean all know-how trade secrets, confidential
information, customer lists, software, technical information, data, process
technology, plans, drawings and other proprietary rights owned, used or held for
use, or licensed by the Company.

      "Tribunal" shall have the meaning set forth in Section H.5(d).

      "UIL" has the meaning set forth in the Recitals of this Agreement.

                                                                            -20-


                                   SCHEDULE C

              REPRESENTATIONS AND WARRANTIES REGARDING THE COMPANY

            The Company and each Seller represent and warrant to the Purchaser
that the statements contained in this Schedule C are correct and complete as of
the date of this Agreement and will be correct and complete as of the Closing
Date (as though made then and as though the Closing Date were substituted for
the date of this Agreement throughout this Schedule C). Such representations and
warranties are made and given subject to the disclosures in the Company
Disclosure Schedule accompanying this Agreement executed, delivered and
certified by the Company.

Section C.1 ORGANIZATION AND GOOD STANDING.

            (a)   The Company is a company limited by shares duly organized and
                  validly existing pursuant to the laws of the Republic of
                  China, with full corporate power and authority to conduct its
                  business as it is now being conducted, to own or use the
                  properties and assets that it purports to own or use, and to
                  perform all its obligations under Applicable Contracts.

            (b)   The Company has delivered to the Purchaser copies of the
                  Organizational Documents of the Company, as currently in full
                  force and effect. The Company is not in violation of any of
                  the provisions of its Organizational Documents.

SECTION C.2 AUTHORITY; NO CONFLICT.

            (a)   This Agreement constitutes the legal, valid, and binding
                  obligation of the Company enforceable against it in accordance
                  with its terms. Upon the execution and delivery by the Company
                  of this Agreement and any other document or agreement required
                  to be executed and delivered by the Company pursuant to the
                  terms of this Agreement (collectively, the "Company Closing
                  Documents"), the Agreement and the Company Closing Documents
                  will constitute the legal, valid, and binding obligations of
                  the Company, enforceable against it in accordance with their
                  respective terms. The Company has the absolute and
                  unrestricted right, power, authority, and capacity to execute
                  and deliver this Agreement and the Company Closing Documents
                  and to perform its obligations under this Agreement and the
                  Company Closing Documents.

            (b)   Except as set forth in Section C.2(b) of the Company
                  Disclosure Schedule, neither the execution and delivery of
                  this Agreement and the Company Closing Documents nor the
                  consummation or performance of the Basic Transaction or the
                  Purchaser's exercise of the Option will, directly or
                  indirectly (with or without notice or lapse of time):

                  (i)   contravene, conflict with, or result in a violation of
                        (A) any provision of the Organizational Documents of the
                        Company, (B) any resolution adopted by the board of
                        directors or the stockholders of the Company; or (C) any
                        Legal Requirement or Order applicable to the Company;

                  (ii)  contravene, conflict with, or result in a violation of,
                        or give any Governmental Body or other Person the right
                        to challenge the Basic Transaction or the Purchaser's
                        exercise of the Option or to exercise any remedy or
                        obtain any relief

                                                                            -21-


                        under, any Legal Requirement or any Order to which the
                        Company, or any of the assets owned or used by the
                        Company, may be subject;

                  (iii) contravene, conflict with, or result in a violation of
                        any of the terms or requirements of, or give any
                        Governmental Body the right to revoke, withdraw,
                        suspend, cancel, terminate, or modify, any Governmental
                        Authorization that is held by the Company or that
                        otherwise relates to the business of, or any of the
                        assets owned or used by the Company;

                  (iv)  alter or violate or impair any license, franchise,
                        permit or other similar authorization held by the
                        Company;

                  (v)   require any consent or other action by any Person under,
                        conflict with, result in a breach of, constitute a
                        default under, or give rise (A) to any right of
                        termination, cancellation or acceleration of any right
                        or obligation of the Company under any Applicable
                        Contract, or (B) to a loss of any benefit to which the
                        Company is entitled under any Applicable Contract; or

                  (vi)  result in the imposition or creation of any Encumbrance
                        upon or with respect to any of the assets owned or used
                        by the Company.

            (c)   Except as set forth in Section C.2(c) of the Company
                  Disclosure Schedule, the Company is not, and will not be,
                  required to give any notice to or obtain any Consent from any
                  Person in connection with the execution and delivery of this
                  Agreement or the consummation or performance of the Basic
                  Transaction or the Purchaser's exercise of the Option.

            (d)   For the purposes of consummating the Basic Transaction and the
                  Purchaser's exercise of the Option, the Company has waived any
                  and all transfer restrictions, if any, on the Shares sought to
                  be transferred by the Sellers to the Purchaser and has
                  obtained the waivers from each party to the Stockholders
                  Agreement dated as of April 2002 by and among the Company and
                  certain shareholders of the Company regarding any rights of
                  first refusal that any shareholder of the Company may have
                  with respect to the transfer of the Shares to the Purchaser.
                  The Company has provided all such waivers to the Purchaser for
                  review.

SECTION C.3 CAPITALIZATION.

            (a)   The authorized capital stock of the Company consists of
                  140,000,000 shares of common stock, par value NT$10 per share,
                  of which 130,000,000 shares are issued and outstanding as of
                  the date hereof. All issued and outstanding Company Shares
                  have been or will be upon issuance duly authorized and validly
                  issued, fully paid and non-assessable. Section C.3(a) of the
                  Company Disclosure Schedule sets forth the names of the
                  holders of the Company Shares and the number and percentage of
                  the Company Shares held by each such holder.

            (b)   Except as set forth in Section C.3(b) of the Company
                  Disclosure Schedule, there are no outstanding (i) shares of
                  capital stock or voting securities of the Company other than
                  the Company Shares, (ii) securities of the Company convertible
                  into or exchangeable for shares of capital stock or voting
                  securities or ownership interests in the Company or (iii)
                  options or other rights to securities or ownership interests
                  in or securities convertible into or exchangeable for capital
                  stock or voting securities or ownership interests in the
                  Company (the items in clauses (i), (ii), and (iii) being
                  referred to

                                                                            -22-



                  collectively as "Company Securities"). The Company has no
                  outstanding bonds, debentures, notes or other obligations the
                  holders of which have the right to vote (or are convertible
                  into or exercisable for securities having the right to vote)
                  with the stockholders of the Company on any matter.

            (c)   None of the outstanding Company Shares or other securities of
                  the Company were issued in violation of any Legal Requirement.

            (d)   Except as set forth in Section C.3(d) of the Company
                  Disclosure Schedule, no holder of Company Securities possesses
                  any right relative to the ownership of such Company Securities
                  other than as set forth in the Company's Organizational
                  Documents.

SECTION C.4 TITLE TO SHARES. The delivery of the Share Certificates to the
            Purchaser provided in Section 1.5(a)(i) above will result in the
            Purchaser's immediate acquisition of record and beneficial ownership
            of the Shares free and clear of all Encumbrances.

SECTION C.5 SUBSIDIARIES. There are no Subsidiaries or branches of the
            Company located anywhere.

SECTION C.6 FINANCIAL INFORMATION. The Company has delivered to the
            Purchaser complete and correct copies of the Financial Statements,
            the Selected Financial Information and the Most Recent Financial
            Information. The Financial Statements are complete and correct in
            all material respects, have been derived from the respective
            accounting books and records of the Company, and have been prepared
            in accordance with R.O.C. GAAP applied on a consistent basis
            throughout the periods presented in the Financial Statements. The
            balance sheets included in the Financial Statements present fairly
            the respective financial position of the Company as at the
            respective dates thereof, and the statements of income and
            statements of cash flows included in the Financial Statements
            present fairly the respective results of operations, cash flows and
            changes in stockholders' equity of the Company for the respective
            periods indicated all in accordance with R.O.C. GAAP. The Selected
            Financial Information is correct in all material respects and has
            been derived from the Financial Statements. The selected financial
            and operating data included in the Selected Financial Information
            present fairly the financial condition and results of operations of
            the Company for the period, and as of the date indicated. The Most
            Recent Financial Information is correct in all material respects and
            has been derived from the unaudited management accounts of the
            Company. The selected financial and operating data included in the
            Most Recent Financial Information present fairly the financial
            condition and results of operations of the Company for the period
            ended, and as of, the Most Recent Month End.

SECTION C.7 BOOKS AND RECORDS. The books of account, stock record books,
            and other records of the Company (specifically excluding the Minute
            Books), all of which have been made available to the Purchaser, are
            complete and correct and have been maintained in accordance with
            sound business practices, including the maintenance of an adequate
            system of internal controls, and accurately reflect all material
            transactions. The Minute Books of the Company are materially
            complete and correct and have been prepared and maintained in
            accordance with ROC Company Law. The Company will not be adversely
            affected by the manner in which the Minute Books have been
            maintained or by the actions taken by the stockholders, the board of
            directors, and the committees of the board of directors of the
            Company which are not fully reflected in the Minute Books.

                                                                            -23-


SECTION C.8  TITLE TO PROPERTIES; ENCUMBRANCES.

             (a)   Except as set forth in Section C.8 (a) of the Company
                   Disclosure Schedule, the Company owns (with good and
                   marketable title in the case of real property, subject only
                   to the matters permitted by the following sentence) all the
                   material properties and assets (whether real, personal, or
                   mixed and whether tangible or intangible) that they purport
                   to own located in the facilities owned or operated by the
                   Company or reflected as owned in the books and records of the
                   Company, including all of the properties and assets reflected
                   in the Financial Statements, and all of the material
                   properties and assets purchased or otherwise acquired by the
                   Company since the Most Recent Month End, which subsequently
                   purchased or acquired material properties and assets are
                   listed in Section C.8(a) of the Company Disclosure Schedule.

             (b)   Except as provided in Section C.8(b) of the Company
                   Disclosure Schedule, all material properties and assets
                   reflected in the Most Recent Financial Information are free
                   and clear of all Encumbrances and are not, in the case of
                   real property, subject to any rights of way, building use
                   restrictions, exceptions, variances, reservations, or
                   limitations of any nature.

SECTION C.9  CONDITION AND SUFFICIENCY OF ASSETS. To the Reasonable
             Knowledge of the Company, the buildings, plants, structures,
             equipment and other material assets of the Company are structurally
             sound. The buildings, plants, structures, equipment and other
             material assets of the Company are in good operating condition and
             repair (subject to normal wear and tear), and are adequate for the
             uses to which they are being put, and none of such buildings,
             plants, structures, equipment or other material assets is in need
             of maintenance or repairs except for ordinary, routine maintenance
             and repairs that are not material in nature or cost. The building,
             plants, structures, equipment and other material assets of the
             Company are sufficient for the continued conduct of their
             respective business after the Closing in substantially the same
             manner as conducted prior to the Closing.

SECTION C.10 ACCOUNTS RECEIVABLE. All accounts receivable of the Company
             that are reflected in the Most Recent Financial Information or on
             the accounting records of the Company as of the Closing Date
             represent or will represent valid obligations arising from sales
             actually made or services actually performed in the Ordinary Course
             of Business.

SECTION C.11 NO UNDISCLOSED LIABILITIES.

             (a)   The Company has no material liabilities or obligations of any
                   nature, whether absolute, accrued, contingent or otherwise
                   and whether due or to become due, except (i) as set forth in
                   Section C.11 of the Company Disclosure Schedule, (ii) as and
                   to the extent disclosed or reserved against in the Balance
                   Sheet or specifically disclosed in the notes thereto and
                   (iii) for liabilities and obligations that (A) are incurred
                   after the date of the Balance Sheet in the Ordinary Course of
                   Business and are not prohibited by this Agreement and (B)
                   individually and in the aggregate, have or result in no
                   material adverse effect.

             (b)   Since the date of the Most Recent Month End, there has not
                   occurred or come to exist any material adverse effect or any
                   event, occurrence, fact, condition, change, development or
                   effect that, individually or in the aggregate, could result
                   in a material adverse effect.

                                                                            -24-


SECTION C.12 TAXES.

             (a)   The Company has prepared and filed or caused to be filed on a
                   timely basis all appropriate ROC governmental agency Tax
                   Returns and reports that are or were required to be filed by
                   it pursuant to applicable Legal Requirements. The Company has
                   delivered or made available to the Purchaser copies of, and
                   Section C.12(a) of the Company Disclosure Schedule contains a
                   complete and accurate list of, all Tax Returns filed by the
                   Company on or since the Inception Date.

             (b)   The Company has paid, or made provision for the payment of,
                   all Taxes that have or may have become due pursuant to any
                   Tax Return filed by, or on their behalf, pursuant to any
                   assessment deficiency or similar notice received by the
                   Company or otherwise.

             (c)   The relevant taxation bureau in the ROC has not audited any
                   tax returns of the Company for any year and (i) no
                   deficiencies have been proposed; (ii) no waivers of the
                   statute of limitations granted to the Company or any Company
                   Subsidiary are now outstanding; and (iii) there are no
                   agreements providing for the extension of time with respect
                   to the assessment of any tax deficiency.

             (d)   All Taxes that the Company is or was required by any Legal
                   Requirement to withhold or collect have been duly withheld or
                   collected and, to the extent required, have been paid to the
                   proper Governmental Body or other Person. There is no action,
                   suit, proceeding, investigation, audit, or claim now pending
                   or threatened by any taxing authority related to the Company
                   or any Company Subsidiary. No claim has ever been made by any
                   taxing authority in a jurisdiction where the Company does not
                   file Tax Returns that the Company is subject to taxation in
                   such jurisdiction.

             (e)   The Company has paid, or has withheld, all Taxes required by
                   any applicable Legal Requirement to be paid or withheld,
                   including but not limited to the following situations in
                   connection with which the Sellers agree to indemnify the
                   Purchaser for Damages pursuant to Section 6.2(b):

                   (i)   All taxes on service fee and license payments;

                   (ii)  Customs duties, value-added taxes and any other Taxes
                         on the SECAP loan equipment; and

                   (iii) any research and development Tax credits claimed on
                         filed Tax Returns for years 1999-2003 which are
                         subsequently denied by the relevant taxation bureau
                         under audit.

Section C.13 NO MATERIAL ADVERSE CHANGE. Since December 31, 2003, there has
             not been any material adverse change in the business, operations,
             properties, prospects, assets, or condition of the Company and no
             event has occurred or circumstance exists that may result in such a
             material adverse change.

SECTION C.14 COMPLIANCE WITH LEGAL REQUIREMENTS. Except as set forth in
             Section C.14 of the Company Disclosure Schedule,

             (a)   the Company and at all times since the Inception Date has
                   been, in full compliance, except where such non compliance
                   would not have a material adverse effect on the Company, with
                   each Legal Requirement that is or was applicable to (i) it,
                   (ii) the

                                                                            -25-


                   conduct or operation of its businesses, or (iii) the
                   ownership or use of any of their respective assets or the
                   issuance;

             (b)   the Company is and at all times since the Inception Date has
                   been, in full compliance with each Legal Requirement that is
                   or was applicable to the issuance, sale and trading of the
                   Company.

             (c)   no event has occurred or circumstance exists that (with or
                   without notice or lapse of time) (i) may constitute or result
                   in a violation by the Company of, or a failure on the part of
                   the Company to comply with, any Legal Requirement, which
                   violation or failure to comply would have a material adverse
                   effect on the Company, or (ii) may give rise to any
                   obligation on the part of the Company to undertake, or to
                   bear all or any portion of the cost of, any remedial action
                   of any nature, which obligation could have a material adverse
                   effect on the Company; and

             (d)   the Company has not received, at any time, any notice or
                   other communication (whether oral or written) from any
                   Governmental Body or any other Person regarding (i) any
                   actual, alleged, possible, or potential violation of, or
                   failure to comply with, any Legal Requirement, which
                   violation or failure to comply would have a material adverse
                   effect on the Company, or (ii) any actual, alleged, possible,
                   or potential obligation on the part of the Company to
                   undertake, or to bear all or any portion of the cost of, any
                   remedial action of any nature, which obligation could have a
                   material adverse effect on the Company.

SECTION C.15 GOVERNMENT AUTHORIZATIONS.

             (a)   The Company holds all Governmental Authorizations necessary
                   to permit the Company to lawfully conduct and operate its
                   businesses in the manner it currently conducts and operates
                   such businesses and to permit the Company to own and use its
                   respective assets in the manner in which it currently owns
                   and uses such assets. All such Governmental Authorizations
                   are valid and in full force and effect.

             (b)   Except as set forth in Section C.15(b) of the Company
                   Disclosure Schedule:

                   (i)   the Company is, and at all times since the Inception
                         Date has been, in full compliance with all of the terms
                         and requirements of each Governmental Authorization
                         held by the Company;

                   (ii)  no event has occurred or circumstance exists that may
                         (with or without notice or lapse of time) (A)
                         constitute or result directly or indirectly in a
                         violation of or a failure to comply with any term or
                         requirement of any Governmental Authorization held by
                         the Company, or (B) result directly or indirectly in
                         the revocation, withdrawal, suspension, cancellation,
                         or termination of, or any modification to, any
                         Governmental Authorization held by the Company;

                   (iii) the Company has not received any notice or other
                         communication (whether oral or written) from any
                         Governmental Body or any other Person regarding (A) any
                         actual, alleged, possible, or potential violation of or
                         failure to comply with any term or requirement of any
                         Governmental Authorization, or (B) any actual,
                         proposed, possible, or potential revocation,
                         withdrawal, suspension, cancellation, termination of,
                         or modification to any Governmental Authorization; and

                                                                            -26-


                   (iv)  all applications required to have been filed for the
                         renewal of the Governmental Authorizations held by the
                         Company have been duly filed on a timely basis with the
                         appropriate Governmental Bodies, and all other filings
                         required to have been made with respect to such
                         Governmental Authorizations have been duly made on a
                         timely basis with the appropriate Governmental Bodies.

Section C.16 LEGAL PROCEEDINGS; ORDERS.

             (a)   Section C.16(a) of the Company Disclosure Schedule contains a
                   complete and correct list of each Proceeding by or against
                   the Company that is currently pending, has been pending at
                   any time since the Inception Date, or to the Reasonable
                   Knowledge of the Company is threatened, and that:

                   (i)   may affect the business of, or any of the assets owned
                         or used by the Company; or

                   (ii)  may have the effect of preventing, delaying, making
                         illegal, or otherwise interfering with, the Basic
                         Transaction or the Purchaser's exercise of the Option.


                         In addition, (1) no event has occurred or, to the
                         Reasonable Knowledge of the Company, no circumstance
                         exists that may give rise to or serve as a basis for
                         the commencement of any Proceeding by or against the
                         Company and (2) no Proceeding has been settled since
                         the Inception Date, for an amount greater than
                         NT$1,000,000. The Company has delivered to the
                         Purchaser copies of all pleadings, correspondence, and
                         other documents relating to each Proceeding (if any)
                         listed in Section C.16(a) of the Company Disclosure
                         Schedule. The Proceedings listed in Section C.16(a) of
                         the Company Disclosure Schedule will not have a
                         material adverse effect on the business, operations,
                         assets, conditions, or prospects of the Company.

             (b)   Except as set forth in Section C.16(b) of the Company
                   Disclosure Schedule,

                   (i)   the Company is not subject to any Order that relates to
                         the business of, or any of the assets owned or used by,
                         the Company;

                   (ii)  no officer or director of the Company is subject to any
                         Order that prohibits such officer or director from
                         engaging in or continuing any conduct, activity, or
                         practice relating to the business of the Company; and

                   (iii) to the Reasonable Knowledge of the Company, no agent or
                         employee of the Company is subject to any Order that
                         prohibits such agent or employee from engaging in or
                         continuing any conduct, activity, or practice relating
                         to the business of the Company;

             (c)   Except as set forth in Section C.16(c) of the Company
                   Disclosure Schedule,

                   (i)   the Company is, and at all times since the Inception
                         Date has been, in full compliance with all of the terms
                         and requirements of each Order to which it, or any of
                         the assets owned or used by it, is or has been subject;

                   (ii)  no event has occurred or circumstance exists that may
                         constitute or result in (with or without notice or
                         lapse of time) a violation of or failure to comply with
                         any term or requirement of any Order to which the
                         Company, or any of the assets owned or used by the
                         Company is subject; and

                   (iii) the Company has not received, at any time, any notice
                         or other communication (whether oral or written) from
                         any Governmental Body or any other Person

                                                                            -27-


                         regarding any actual, alleged, possible, or potential
                         violation of, or failure to comply with, any term or
                         requirement of any Order to which the Company, or any
                         of the assets owned or used by the Company, is or has
                         been subject.

Section C.17 ABSENCE OF CERTAIN CHANGES AND EVENTS. Except as set forth in
             Section C.17 of the Company Disclosure Schedule, since December 31,
             2003, the Company has conducted its business only in the Ordinary
             Course of Business and there has not been any:

             (a)   event, occurrence, development or state of circumstances or
                   facts which has had or is reasonably expected to have a
                   material adverse effect, other than those resulting from
                   changes in general conditions (including laws and
                   regulations) applicable to the industry, or general economic
                   conditions;

             (b)   payment or increase by the Company of any bonuses, salaries,
                   or other compensation or benefits to any stockholder,
                   director, or except in the Ordinary Course of Business
                   officer or employee;

             (c)   entry into any employment, severance, or similar Contract
                   with any director, officer, or employee (other than in the
                   case of an employee in the Ordinary Course of Business), or
                   debt issued or advances made to any stockholder, director,
                   officer, or employee (other than in the case of an employee
                   in the Ordinary Course of Business);

             (d)   damage to or destruction or loss of any asset or property of
                   the Company, whether or not covered by insurance, which
                   damage, destruction or loss has materially and adversely
                   affected the properties, assets, business, financial
                   condition, or prospects of the Company, taken as a whole;

             (e)   sale, lease, transfer or other disposition (other than in the
                   Ordinary Course of Business) of any asset or property of the
                   Company in excess of NT$10,000,000;

             (f)   repayment of any debt other than debt disclosed in the
                   Financial Statements or incurred in the Ordinary Course of
                   Business;

             (g)   material change in the accounting methods used by the
                   Company;

             (h)   any occurrence, assumption or guarantee by the Company of any
                   Indebtedness (other than in the Ordinary Course of Business)
                   in excess of NT$20,000,000 or increase in the aggregate
                   Indebtedness (other than in the Ordinary Course of Business
                   including capital expenditures) of the Company in excess of
                   NT$20,000,000;

             (i)   failure on the part of the Company to make accruals in
                   amounts sufficient to cover the Company's obligations under
                   its pension plan and performance pay or other incentive
                   plans; or

             (j)   any other agreement to do any of the foregoing, whether oral
                   or written, or event or condition of any nature that might
                   materially and adversely affect the assets properties,
                   financial condition, operating results or business of the
                   Company.

                                                                            -28-


Section C.18 CONTRACTS; NO DEFAULTS.

             (a)   Section C.18(a) of the Company Disclosure Schedule contains a
                   complete and accurate list, if any, and the Company has
                   delivered to the Purchaser true and complete copies, of each
                   Applicable Contract involving an amount or value in excess of
                   NT$3,000,000.

             (b)   Except as set forth in Section C.18(b) of the Company
                   Disclosure Schedule, no officer, director, agent, employee,
                   consultant, or contractor of the Company is bound by any
                   Contract that purports to limit the ability of such officer,
                   director, agent, employee, consultant, or contractor to (A)
                   engage in or continue any conduct, activity, or practice
                   relating to the business of the Company, or (B) assign to the
                   Company or to any other Person any rights to any invention,
                   improvement, or discovery.

             (c)   Except as set forth in Section C.18(c) of the Company
                   Disclosure Schedule, each Applicable Contract identified or
                   required to be identified in Section C.18(a) of the Company
                   Disclosure Schedule is in full force and effect and is valid
                   and enforceable in accordance with its terms.

             (d)   Except as set forth in Section C.18(d) of the Company
                   Disclosure Schedule,

                   (i)   the Company is, and at all times since the Inception
                         Date has been, in substantial compliance with all
                         applicable terms and requirements of each Applicable
                         Contract;

                   (ii)  to the Reasonable Knowledge of the Company, each other
                         Person that has or had any obligation or liability
                         under any Applicable Contract under which the Company
                         has or had any rights is, and at all times has been, in
                         full compliance with all applicable terms and
                         requirements of such Contract;

                   (iii) no event has occurred or circumstance exists that (with
                         or without notice or lapse of time) may contravene,
                         conflict with, or result in a violation or breach of,
                         or give the Company or, to the Reasonable Knowledge of
                         the Company, any other Person the right to declare a
                         default or exercise any remedy under, or to accelerate
                         the maturity or performance of, or to cancel,
                         terminate, or modify, the Applicable Contract; and

                   (iv)  the Company has not given to or received from any other
                         Person, at any time any notice or other communication
                         (whether oral or written) regarding any actual,
                         alleged, possible, or potential violation or breach of,
                         or default under, any Applicable Contract.

             (e)   There are no renegotiations of, attempts to renegotiate, or
                   outstanding rights to renegotiate any material amounts paid
                   or payable to the Company under current or completed
                   Applicable Contracts with any Person and, to the Reasonable
                   knowledge of the Company no such Person has made written
                   demand for such renegotiation.

             (f)   The Applicable Contracts listed in Section C.18(a) of the
                   Company Disclosure Schedule have not been entered into in
                   violation of any Legal Requirement.

Section C.19 INSURANCE.

             (a)   All policies to which the Company is or was a party or that
                   provide coverage to either the Company, or any director or
                   officer of the Company:

                                                                            -29-


                   (i)   are or were valid, outstanding, and enforceable;

                   (ii)  to the Reasonable Knowledge of the Company, are or were
                         issued by an insurer that is financially sound and
                         reputable;

                   (iii) to the Reasonable Knowledge of the Company, provide or
                         provided adequate insurance coverage for the assets and
                         the operations of the Company for all risks normally
                         insured against by a Person carrying on the same
                         business or businesses in the ROC as the Company;

                   (iv)  to the Reasonable Knowledge of the Company, are or were
                         sufficient for compliance with all Legal Requirements
                         and Contracts to which the Company is a party or by
                         which any of them is bound; and

                   (v)   will continue in full force and effect following the
                         consummation of the Basic Transaction and the
                         Purchaser's exercise of the Option.

             (b)   The Company has not received (i) any refusal of coverage or
                   any notice that a defense will be afforded with reservation
                   of rights, or (ii) any notice of cancellation or any other
                   indication that any insurance policy is no longer in full
                   force or effect or will not be renewed or that the issuer of
                   any policy is not willing or able to perform its obligations
                   thereunder.

             (c)   The Company has paid all premiums due, and has otherwise
                   performed all of its obligations, under each policy to which
                   the Company is a party or that provides coverage to the
                   Company or any director thereof.

             (d)   The Company has given notice to the insurer of all claims
                   that may be insured thereby.

SECTION C.20 EMPLOYMENT MATTERS.

             (a)   The Company has made all accruals necessary to fund its
                   obligations under its pension plan and performance pay or
                   other incentive plans. The Company is not liable for any
                   unpaid wages, vacation pay, bonuses, benefit payments,
                   pension fund contributions or commissions, or for any
                   material tax, penalty, assessment, or forfeiture for failure
                   to comply with any employer/employee matter.

             (b)   The Company is not in violation of any Legal Requirement
                   governing employment and labor matters where the failure to
                   be in compliance would have a material adverse effect on the
                   Company or its business.

             (c)   The employees of the Company are not represented by a labor
                   organization, no union claims to represent any such employees
                   and, to the Reasonable Knowledge of the Company, no union
                   organizing effort is or within the last two (2) years has
                   been underway involving employees of the Company. There are
                   no strikes, lockouts, work stoppages, slowdowns,
                   jurisdictional disputes, material grievances, material
                   arbitrations or organizing activities occurring or threatened
                   with respect to the Company.

SECTION C.21 INTELLECTUAL PROPERTY. To the Company's Reasonable Knowledge,
             after due inquiry: (a) all of the Intellectual Property is valid
             and is owned or legally used by the Company, free and clear of all
             Encumbrances; (b) no further licenses or authorizations are

                                                                            -30-


             required to be obtained in order for the Company to legitimately
             use the Intellectual Property to operate the Company's business in
             the ordinary course; (c) none of the Company's rights in or use of
             such Intellectual Property infringes on the rights of others or has
             been, or is currently being, or threatened to be, challenged; (d)
             all of the Intellectual Property registrations have been duly
             issued and have not been canceled, abandoned, or otherwise
             terminated; (e) all of the Intellectual Property applications have
             been duly filed with the appropriate authorities; (f) no consents
             or approvals of any Person owning Intellectual Property are
             necessary for the Company to participate in the Basic Transaction
             or the Purchaser's exercise of the Option or to enter into this
             Agreement or any Company Closing Document; and (g) the execution of
             this Agreement and the Company Closing Documents and consummation
             of the Basic Transaction or the Purchaser's exercise of the Option
             will not conflict with or impair such Intellectual Property. The
             Company owns or has the right to use all of the Intellectual
             Property necessary to conduct its operations and business. To the
             Reasonable Knowledge of the Company, there are no claims, or any
             basis for any claims, by third parties that it has infringed any
             intellectual property of any other Person or that any other Person
             has infringed any of the Intellectual Property of the Company.
             Except as set forth in Section C.21 of the Company Disclosure
             Schedule, no third party has been permitted or licensed to use any
             of the Intellectual Property or been granted any option thereto,
             and no royalties or other fees are payable to any third party with
             respect to any of the Intellectual Property.

SECTION C.22 RELATIONSHIPS WITH RELATED PERSONS.

             (a)   Except as set forth in Section C.22(a) of the Company
                   Disclosure Schedule, neither the Company nor any Related
                   Person of the Company has since the Inception Date, has had,
                   any interest in any property (whether real, personal, or
                   mixed and whether tangible or intangible), used in or
                   pertaining to the business of the Company. Neither the
                   Company, nor any Related Person of the Company is, or since
                   the Inception Date, has owned (of record or as a beneficial
                   owner) an equity interest or any other financial or profit
                   interest in, a Person that has (i) had business dealings or a
                   material financial interest in any transaction with the
                   Company, or (ii) engaged in competition with the Company with
                   respect to any line of the products or services of the
                   Company in any market presently served by the Company.

             (b)   Except as set forth in Section C.22(b) of the Company
                   Disclosure Schedule or in the Financial Statements, neither
                   the Company nor any Related Person of the Company is, or
                   since the Inception Date, was, a party to any Contract with,
                   or has or had any claim or right against, the Company.

             (c)   Section C.22(c) of the Company Disclosure Schedule contains a
                   list of all Indebtedness between the Company and a Related
                   Person of the Company including the amount thereof and the
                   payment obligations thereunder.

SECTION C.23 BROKERS OR FINDERS. Except as set forth in Section C.23 of
             the Company Disclosure Schedule, neither the Company, nor its
             agents have incurred any obligation or liability, contingent or
             otherwise, for brokerage or finders' fees or agents' commissions or
             other similar payment in connection with this Agreement.

                                                                            -31-


SECTION C.24 DISCLOSURE.

             (a)   No representation or warranty of the Company in this
                   Agreement and no statement in the Company Disclosure Schedule
                   omits to state a material fact necessary to make the
                   statements herein or therein, in light of the circumstances
                   in which they were made, not misleading.

             (b)   The Financial Information does not contain any untrue
                   statement of a material fact or omit to state a material fact
                   required to be stated therein or necessary in order to make
                   the statements therein, in light of the circumstances under
                   which they are made, not misleading.

             (c)   There is no fact known to the Company that has specific
                   application to the Company (other than general economic or
                   industry conditions) and that materially adversely affects
                   or, as far as the Company can reasonably foresee, materially
                   threatens, the assets, businesses, prospects, financial
                   condition, or results of operations of the Company
                   (separately or on a consolidated basis) that has not been set
                   forth in this Agreement or the Company Disclosure Schedule.

SECTION C.25 ENVIRONMENTAL, HEALTH AND SAFETY MATTERS.

             (a)   The Company has complied and is in compliance with all
                   Environmental, Health, and Safety Requirements.

             (b)   Without limiting the generality of the foregoing, the Company
                   has obtained and complied with, and is in compliance with,
                   all permits, licenses and other authorizations that are
                   required pursuant to Environmental, Health, and Safety
                   Requirements for the occupation of its facilities and the
                   operation of its business.

             (c)   The Company has not received any written or verbal notice,
                   report or other information regarding any actual or alleged
                   violation of Environmental, Health, and Safety Requirements,
                   or any liabilities or potential liabilities (whether accrued,
                   absolute, contingent, unliquidated or otherwise), including
                   any investigatory, remedial or corrective obligations,
                   relating to any of them or its facilities arising under
                   Environmental, Health, and Safety Requirements.

             (d)   None of the following exists at any property or facility
                   owned or operated by the Company: (i) underground storage
                   tanks, (ii) asbestos-containing material in any form or
                   condition, (iii) materials or equipment containing
                   polychlorinated biphenyls, or (iv) landfills, surface
                   impoundments, or disposal areas.

             (e)   The Company has not treated, stored, disposed of, arranged
                   for or permitted the disposal of, transported, handled, or
                   released any substance, including without limitation any
                   hazardous substance, or owned or operated any property or
                   facility (and no such property or facility is contaminated by
                   any such substance) in a manner that has given or would give
                   rise to liabilities, including any liability for response
                   costs, corrective action costs, personal injury, property
                   damage, natural resources damages or attorney fees, pursuant
                   to any Environmental, Health, and Safety Requirements.

                                                                            -32-


             (f)   Neither this Agreement nor the consummation of the Basic
                   Transaction or the Purchaser's exercise of the Option will
                   result in any obligations for site investigation or cleanup,
                   or notification to or consent of any Government Body or third
                   parties.

             (g)   The Company has not, either expressly or by operation of law,
                   assumed or undertaken any liability, including without
                   limitation any obligation for corrective or remedial action,
                   of any other Person relating to Environmental, Health, and
                   Safety Requirements.

             (h)   No facts, events or conditions relating to the past or
                   present facilities, properties or operations of the Company
                   will prevent, hinder or limit continued compliance with
                   Environmental, Health, and Safety Requirements, give rise to
                   any investigatory, remedial or corrective obligations
                   pursuant to Environmental, Health, and Safety Requirements,
                   or give rise to any other liabilities (whether accrued,
                   absolute, contingent, unliquidated or otherwise) pursuant to
                   Environmental, Health, and Safety Requirements, including
                   without limitation any relating to onsite or offsite releases
                   or threatened releases of hazardous materials, substances or
                   wastes, personal injury, property damage or natural resources
                   damage.

SECTION C.26 WAIVER OF TRANSFER RESTRICTIONS. The Company hereby waives all
             stock transfer restrictions contained in the various agreements
             between the Company and each of the Sellers with respect to each of
             the Seller's sale of Shares and Remaining Shares to the Purchaser
             pursuant to this Agreement.

                                                                            -33-



                                   SCHEDULE D

               REPRESENTATIONS AND WARRANTIES REGARDING THE SHARES

            Each of the Sellers, severally, represents and warrants to the
Purchaser that the statements contained in this Schedule D are correct and
complete as of the date of this Agreement and will be correct and complete as of
the Closing Date and the Exercise Date (as though made then and as though the
Closing Date or the Exercise Date, as the case may be, were substituted for the
date of this Agreement throughout this Schedule D). Such representations and
warranties are made and given subject to the disclosures in the Sellers'
Disclosure Schedule accompanying this Agreement executed, delivered and
certified by the Sellers.

SECTION D.1 OWNERSHIP. The Shares set forth by each Seller's name in Schedule A
            are duly authorized, validly issued, fully paid, and non-assessable.
            Each Seller owns its Shares free and clear of all Encumbrances. Each
            Seller has the right, power, and authority to sell, assign, transfer
            and convey it Shares as provided herein, and upon such sale, the
            Purchaser will receive good and valid title to all of its Shares,
            free and clear of all Encumbrances. The Share Certificates for each
            Seller's Shares will be, when delivered to the Purchaser, in proper
            form for transfer.

SECTION D.2 AUTHORITY. This Agreement constitutes the legal, valid, and binding
            obligation of each Seller enforceable against it in accordance with
            its terms. Upon the execution and delivery by the Seller's Attorney
            of this Agreement and any other document or agreement required to be
            executed and delivered by each Seller pursuant to the terms of this
            Agreement (including the Seller POA) (collectively, the "Sellers
            Closing Documents"), the Agreement and the Sellers Closing Documents
            will constitute the legal, valid, and binding obligations of each
            Seller, enforceable against each Seller in accordance with their
            respective terms. Each Seller has properly granted to the Seller's
            Attorney the absolute and unrestricted right, power, authority, and
            capacity to execute and deliver this Agreement and the Sellers
            Closing Documents on its behalf and each Seller has the absolute and
            unrestricted right, power, authority, and capacity to perform its
            obligations under this Agreement and the Sellers Closing Documents.
            The execution, delivery, and performance of this Agreement and the
            Sellers Closing Documents and the consummation of the Basic
            Transaction and the Purchaser's exercise of the Option have been
            duly authorized by all requisite action on the part of each of the
            Sellers, and no other proceeding, authorization or approval on the
            part of any of the Sellers is necessary to authorize the execution
            and delivery of this Agreement or any of the Sellers Closing
            Documents or the performance by any of the Sellers of the Basic
            Transaction or the Purchaser's exercise of the Option.

SECTION D.3 NO VIOLATION. Neither the execution, delivery or performance of this
            Agreement nor the consummation of the Basic Transaction or the
            Purchaser's exercise of the Option (i) will violate or conflict with
            the Organizational Documents of any Seller, (ii) will conflict with
            or result in any breach of or default under any provision of any
            contract or agreement of any kind to which a Seller is a party or by
            which a Seller is bound, (iii) is prohibited by or requires a Seller
            to obtain or make any consent, authorization, approval, registration
            or filing under any Legal Requirement or Order of any Governmental
            Body or of any other Person, (iv) will cause any acceleration of the
            maturity of any note, instrument or other obligation to which a
            Seller is a party or by which a Seller is bound or with respect to
            which a Seller is an obligor or guarantor or (v) will result in the
            creation or imposition of any Encumbrance upon or give to any

                                                                            -34-



            other Person any interest or right (including any right of
            termination or cancellation) in or with respect to any of the
            properties, assets, business, agreements or contracts of a Seller.

SECTION D.4 BROKERS OR FINDERS. Except as set forth in Section D.4 of the
            Sellers' Disclosure Schedule, none of the Sellers nor any of their
            agents have incurred any obligation or liability, contingent or
            otherwise, for brokerage or finders' fees or agents' commissions or
            other similar payment in connection with this Agreement.

SECTION D.5 RELEASE OF CLAIMS AGAINST PURCHASER AND PURCHASER'S REPRESENTATIVES.
            Each Seller agrees that upon receipt of Purchase Price after the
            consummation of the Basic Transaction, he/she/it shall be deemed to
            thereupon release and forever discharge the Purchaser, its
            Affiliates and its Representatives from any and all claims, causes
            of action, obligations, damages and liabilities relating to the
            Basic Transaction, the Purchaser Closing Documents and this
            Agreement, except for the Purchaser's obligations with respect to
            the Option and under Article 6. Each Seller further agrees that upon
            receipt of the Exercise Price after the consummation of the
            Purchaser's exercise of the Option, he/she/it shall be deemed to
            thereupon release and forever discharge the Purchaser, its
            Affiliates and its Representatives from any and all claims, causes
            of action, obligations, damages and liabilities relating to the
            Purchaser's exercise of the Option, this Agreement and otherwise
            with respect to the transactions contemplated by this Agreement.

SECTION D.6 APPROVAL OF PURCHASE OF ALL SHARES OF UIL BY THE PURCHASER. Each
            Seller has been notified that, as a condition precedent to the Basic
            Transaction and contemporaneous with the Closing, the Purchaser
            shall purchase all the Shares held by UIL and hereby agrees to the
            terms thereof. Each Seller hereby releases and forever discharges
            the Purchaser and all of its directors, officers, employees,
            shareholders, agents, representatives, affiliates, successors and
            assigns, and each of them, separately and collectively, from any and
            all claims, obligations, damages and liabilities, in connection with
            the purchase by the Purchaser of all the Shares of UIL.

SECTION D.7 WAIVER OF RIGHT OF FIRST REFUSAL. Each Seller hereby waives its
            right of first refusal pursuant to the Stockholders' Agreement dated
            as of April 2002 by and among the Company and certain shareholders
            of the Company with respect to the Basic Transaction and the
            Purchaser's exercise of the Option.

                                                                            -35-



                                   SCHEDULE E

                 REPRESENTATIONS AND WARRANTIES OF THE PURCHASER

            The Purchaser represents and warrants to Company and the Sellers
that the statements contained in this Schedule E are correct and complete as of
the date of this Agreement and will be correct and complete as of the Closing
Date (as though made then and as though the Closing Date were substituted for
the date of this Agreement throughout this Schedule E). Such representations and
warranties are made and given subject to the disclosures in the Purchaser's
schedules accompanying this Agreement executed, delivered and certified by the
Purchaser.

Section E.1 ORGANIZATION AND GOOD STANDING. The Purchaser is corporation duly
            organized, validly existing and in good standing under the laws of
            the State of Delaware, U.S.A.

Section E.2 AUTHORITY; NO CONFLICT

            (a)   This Agreement constitutes the legal, valid, and binding
                  obligation of the Purchaser, enforceable against it in
                  accordance with its terms. Upon execution and delivery by the
                  Purchaser of this Agreement and any other document or
                  agreement required to be executed and delivered by the
                  Purchaser pursuant to the terms of this Agreement
                  (collectively, the "Purchaser Closing Documents"), the
                  Agreement and Purchaser Closing Documents will constitute the
                  legal, valid and binding obligations of the Purchaser,
                  enforceable against it in accordance with their respective
                  terms. The Purchaser has the absolute and unrestricted right,
                  power, and authority to execute and deliver this Agreement and
                  Purchaser Closing Documents and to perform its respective
                  obligations under this Agreement and Purchaser Closing
                  Documents.

            (b)   Except as set forth in Section E.2(b) of Purchaser Disclosure
                  Schedule, neither the execution and delivery of this Agreement
                  and Purchaser Closing Documents by the Purchaser nor the
                  consummation or performance of the Basic Transaction or the
                  exercise of the Option by the Purchaser will give any Person
                  the right to prevent, delay, or otherwise interfere with the
                  Basic Transaction or the Purchaser's exercise of the Option
                  pursuant to:

                  (i)   any provision of the Purchaser's Organizational
                        Documents;

                  (ii)  any resolution adopted by the board of directors of the
                        Purchaser;

                  (iii) any Legal Requirement or Order to which the Purchaser
                        may be subject; or

                  (iv)  any Contract to which the Purchaser is a party or by
                        which the Purchaser may be bound.

            (c)   Except as set forth in Section E.2(c) of Purchaser Disclosure
                  Schedule, the Purchaser is not, or will not be, required to
                  obtain any Consent from any Person in connection with the
                  execution and delivery of this Agreement or the consummation
                  or performance of the Basic Transaction or the Purchaser's
                  exercise of the Option.

Section E.3 CERTAIN PROCEEDINGS. No Proceeding has been commenced or, to the
            Reasonable Knowledge of the Purchaser, threatened against the
            Purchaser that challenges, or may

                                                                            -36-



            have the effect of preventing, delaying, making illegal, or
            otherwise interfering with, the Basic Transaction or the Purchaser's
            exercise of the Option.

SECTION E.4 BROKERS OR FINDERS. Except as disclosed in Section E.4 of the
            Purchaser Disclosure Schedule, the Purchaser and its respective
            directors, officers and agents have incurred no obligation or
            liability, contingent or otherwise, for brokerage or finders' fees
            or agents' commissions or other similar payments in connection with
            this Agreement.

                                                                            -37-



                                   SCHEDULE F

           CONDITIONS PRECEDENT TO THE PURCHASER'S OBLIGATION TO CLOSE

            The obligation of the Purchaser to purchase the Shares and to take
the other actions required to be taken by the Purchaser at the Closing is
subject to the satisfaction, at or prior to the Closing, of each of the
following conditions (any of which may be waived by the Purchaser, in whole or
in part if it executes a writing so stating at or prior to Closing):

Section F.1 ACCURACY OF REPRESENTATIONS. All of the representations and
            warranties of the Company and the Sellers in this Agreement
            (considered collectively), and each of these representations and
            warranties (considered individually), must have been accurate in all
            material respects as of the date of this Agreement, and must be
            accurate in all material respects at and as of the Closing Date, as
            if made at and as of the Closing Date; provided however that the
            representations and warranties set forth in Section C.3 and Section
            C.4 must be accurate in all respects.

Section F.2 THE COMPANY'S PERFORMANCE.

            (a)   Except as set forth in Section F.2(b) below, all of the
                  covenants and obligations that the Company is required to
                  perform or to comply with pursuant to this Agreement at or
                  prior to the Closing, including those listed in Schedule I,
                  (considered collectively), and each of these covenants and
                  obligations (considered individually), must have been duly
                  performed and complied with in all material respects.

            (b)   Each document or other delivery required to be delivered
                  pursuant to Section 1.5(a) must have been delivered.

Section F.3 CONSENTS. All Consents required in Section C.2 of the Company
            Disclosure Schedule must have been obtained and must be in full
            force and effect. Complete and correct copies of all such Consents
            shall have been delivered to the Purchaser.

Section F.4 ADDITIONAL DOCUMENTS. The Company must have caused the following
            documents to be delivered to the Purchaser:

            (a)   properly chopped and endorsed Share Certificates and duly
                  completed and executed or chopped applications and other
                  documentation necessary for the transfer of the Shares to the
                  Purchaser in the Basic Transaction;

            (b)   properly chopped and endorsed Share Certificates and duly
                  completed and executed or chopped applications and other
                  documentation necessary for the transfer of the Remaining
                  Shares to the Purchaser when the Purchaser exercises the
                  Option, such Share Certificates to be held in escrow in
                  accordance with Section 6.5 and pending the Purchaser's
                  exercise of the Option.

            (c)   the Amended Joint Venture Agreement executed by the Company
                  and the Sellers' Representative on behalf of each Seller;

            (d)   the opinion of THY Taiwan International Law Offices, dated the
                  Closing Date, covering the points set forth in Exhibit F.4 (a)
                  in a form acceptable to the Purchaser;

                                                                            -38-



            (e)   such other documents as the Purchaser may reasonably request
                  for the purpose of enabling their counsel to provide the
                  opinion referred to in Section G.4(a) below;

            (f)   subject to Section F.5 hereof, a fully executed or chopped
                  original Seller POA from each Seller;

            (g)   the notices to all of the directors of the Company to convene
                  a meeting of the Company's Board of Directors in accordance
                  with Section 4.1, previously approved by the Purchaser and
                  ready to be sent on the first business day after the Closing
                  Date;

            (h)   Attachment C.12(a) to the Company Disclosure Schedule; and

            (i)   such other documents as the Purchaser may reasonably request
                  for the purpose of facilitating the consummation or
                  performance of the Basic Transaction.

SECTION F.5 MINIMUM PARTICIPATION OF SHAREHOLDERS. The shareholders of the
            Company participating in the Basic Transaction as Sellers (i.e.,
            those who have returned duly and properly executed or chopped Seller
            POAs) must represent at least 90% of the outstanding Shares,
            excluding the Shares held by UIL (i.e., 74% of the total outstanding
            Shares of the Company).

SECTION F.6 ESCROW. Prior to the Closing Date, the Purchaser, the Sellers
            (represented by the Sellers' Representative) and the Escrow Agent
            shall enter into a mutually acceptable escrow agreement to govern
            the escrow arrangements with respect to the Purchase Price set aside
            for shareholders of the Company who have not become Sellers as of
            the Closing Date, the Share Certificates representing the Remaining
            Shares, the Share Certificates (or cash) held in accordance with
            Section 6.5, and the distribution to the Sellers of the proceeds of
            the Basic Transaction and the Purchaser's exercise of the Option,
            provided, however, that the fees of the Escrow Agent and expenses
            associated with the escrow arrangements (the "Escrow Fees and
            Expenses") shall be borne by the Purchaser to the extent not
            exceeding (including) US$25,000 and the Escrow Fees and Expenses
            exceeding US$25,000 shall be equally borne by the Sellers and the
            Purchaser (on a 50%/50% basis). Such escrow agreement shall set
            forth clear instructions with respect to the release of the Share
            Certificates or cash, provided, however, that the Purchaser shall
            indemnify the Sellers for any damages resulting from breaches of the
            escrow agreement not attributable to the Sellers, unless otherwise
            provided by such escrow agreement.

SECTION F.7 NO PROCEEDINGS. Since the date of this Agreement, there must not
            have been commenced or threatened against the Purchaser, or against
            any Person affiliated with the Purchaser, any Proceeding (a)
            involving any challenge to, or seeking damages or other relief in
            connection with, any of the transactions contemplated hereby, or (b)
            that may have the effect of preventing, delaying, making illegal, or
            otherwise interfering with any of the transactions contemplated
            hereby.

SECTION F.8 NO PROHIBITION. Neither the consummation nor the performance of any
            of the transactions contemplated hereby will, directly or indirectly
            (with or without notice or lapse of time), materially contravene, or
            conflict with, or result in a material violation of, or cause the
            Purchaser or any Person affiliated with the Purchaser to suffer any
            material adverse consequence under, (a) any applicable Legal
            Requirement or Order, or (b) any Legal Requirement or Order that has
            been published, introduced, or otherwise proposed by or before any
            Governmental Body.

                                                                            -39-



Section F.9  THE PURCHASER'S APPROVALS. To the extent noT previously
             authorized by the Board of Directors of the Purchaser, the
             Purchaser shall have obtained any other required corporate approval
             or authorization, including foreign investment approval of the
             Investment Commission of the Ministry of Economic Affairs of the
             Republic of China. The Purchaser shall pursue satisfaction of this
             condition in good faith.

Section F.10 PARTICIPATION OF UIL. The Purchaser shall have reached
             agreement with and shall have signed a binding agreement with UIL
             regarding (a) a modified Sublicense Agreement and modified
             Collaborative Services Agreement or (b) a transaction that provides
             the same effect for the Purchaser. For the avoidance of doubt, this
             condition shall be deemed fully satisfied at such time that such a
             binding agreement has been signed by the Purchaser and UIL,
             irrespective of whether the closing for any transaction
             contemplated by such agreement has occurred.

                                                                            -40-



                                   SCHEDULE G

             CONDITIONS PRECEDENT TO THE COMPANY'S AND THE SELLERS'
                              OBLIGATION TO CLOSE

            The obligation of the Sellers to sell the Shares and the Sellers and
the Company to take the other actions required to be taken by them at the
Closing is subject to the satisfaction, at or prior to the Closing, of each of
the following conditions (any of which may be waived by the Company, in whole or
in part if executes a writing so stating at or prior to Closing):

Section G.1 ACCURACY OF REPRESENTATIONS. All of the Purchaser's representations
            and warranties in this Agreement (considered collectively), and each
            of these representations and warranties (considered individually),
            must have been accurate in all material respects as of the date of
            this Agreement and must be accurate in all material respects as of
            the Closing Date as if made on the Closing Date, except for those
            representations and warranties made of a specified date.

Section G.2 THE PURCHASER'S PERFORMANCE. The Purchaser must have delivered each
            of the documents and other deliveries required to be delivered by
            the Purchaser pursuant to Section 1.5(b) and must have made the Cash
            Payment required to be made by the Purchaser the pursuant to Section
            1.5(b)(i).

Section G.3 CONSENTS. All Consents required in Section E.2 of the Purchaser
            Disclosure Schedule must have been obtained and must be in full
            force and effect. Complete and correct copies of all such Consents
            shall have been delivered to the Company.

SECTION G.4 ADDITIONAL DOCUMENTS. The Purchaser must have caused the following
            documents to be delivered to Company and/or the

            (a)   an opinion of counsel to the Purchaser, dated the Closing
                  Date, covering the points set forth in Exhibit G.4(a) and in a
                  form acceptable to the Sellers; and

            (b)   such other documents as Company may reasonably request for the
                  purpose of enabling its counsel to provide the opinions
                  referred to in Section G.4(a) above;

            (c)   the Amended Joint Venture Agreement, executed by the
                  Purchaser; and

            (d)   such other documents as the Company may reasonably request for
                  the purposes of otherwise facilitating the consummation of the
                  Basic Transaction.

Section G.5 NO PROHIBITION. There must not be in effect any Legal Requirement or
            Order that (i) prohibits the sale of the Shares of the Sellers to
            the Purchaser or (ii) materially contravenes or conflicts with the
            Company's or the Sellers' performance of the Basic Transaction.

                                                                            -41-



                                   SCHEDULE H

                               GENERAL PROVISIONS

Section H.1 EXPENSES. Each party will be responsible for its own expenses in
            connection with the preparation, execution, and performance of this
            Agreement and the Basic Transaction and the Purchaser's exercise of
            the Option, including, without limitation, all travel and
            accommodation expenses of its Representatives and all third party
            professional expenses. The Sellers understand and agree that any
            Sellers' Transaction Fees incurred in connection with the
            Purchaser's exercise of the Option shall be deducted pro rata from
            the proceeds of the Exercise Price paid to each Seller.

Section H.2 PUBLIC ANNOUNCEMENTS. Any public announcement or similar publicity
            to be issued by the Purchaser, the Company or any of the Sellers
            with respect to this Agreement or the Basic Transaction or the
            Purchaser's exercise of the Option will be issued, if at all, at
            such time and in such manner as the Purchaser and the Company shall
            mutually agree. Unless consented to by the Company or the Purchaser
            in advance or required by Legal Requirements, each Party (including
            each Seller) shall keep this Agreement strictly confidential and may
            not make any disclosure of this Agreement to any Person; provided,
            however, that if applicable Legal Requirements require the Company,
            the Purchaser or a Seller to disclose this Agreement or the terms
            hereof, such party shall provide the Company and the Purchaser with
            five (5) business days' prior written notice of such disclosure and
            a copy of such disclosure. The Parties will consult with each other
            concerning the means by which the employees, customers, and
            suppliers of the Company and others having dealings with the Company
            will be informed of the Basic Transaction or the Purchaser's
            exercise of the Option, and the Purchaser will have the right to be
            present for any such communication.

Section H.3 CONFIDENTIALITY. The Nondisclosure Agreement, dated September 15,
            2003, entered into by the Company and the Purchaser is incorporated
            herein by this reference and shall remain in full force and effect
            by its terms.

Section H.4 NOTICES. All notices, consents, waivers, and other communications
            under this Agreement must be in writing and will be deemed to have
            been duly given when (a) delivered by hand (with written
            confirmation of receipt), (b) sent by telecopier (with written
            confirmation of receipt), provided that a copy is mailed by
            registered mail, return receipt requested, or (c) when received by
            the addressee, if sent by an internationally recognized overnight
            delivery service (receipt requested), in each case to the
            appropriate addresses and telecopier numbers set forth below (or to
            such other addresses and telecopier numbers as a Party may designate
            by notice to the other Party):

            Company:          Unitive Semiconductor Taiwan Corporation
                              39 Kuang-Fu North Road
                              Hsin Chu Hsien, Taiwan, ROC
                              Attention: Daniel Teng, President
                              Telephone: +886-3-5972777 Ext.7000
                              Facsimile: +886-3-5972888

                                                                            -42-



            The Sellers:      Unitive Semiconductor Taiwan Corporation
                              39 Kuang-Fu North Road
                              Hsin Chu Hsien, Taiwan, ROC
                              Attention: Ray C. Chang and/or Daniel Teng
                              Attorneys-in-Fact for the Sellers
                              Telephone: +886-3-5972777 Ext.7000
                              Facsimile: +886-3-5972888

            The Purchaser:    Amkor Technology, Inc.
                              1345 Enterprise Drive
                              West Chester, PA 19380, U.S.A.
                              Attention: General Counsel
                              Telephone: +1-610-431-9600
                              Facsimile: +1-610-431-7189

            With a copy to:   The Pamir Law Group
                              14/F, 116 Nanking East Road, Sec. 2
                              Taipei 104, Taiwan
                              Attention: Michael D. Lee
                              Telephone: (886-2) 2531-5816
                              Facsimile: (886-2) 2531-5814

Section H.5 RESOLUTION OF DISPUTES.

            (a)   Amicable Settlement. All disputes in connection with the
                  interpretation or implementation of this Agreement, or the
                  breach, termination or invalidity hereof, so far as is
                  reasonably possible, shall be settled amicably through
                  friendly consultation by the Parties.

            (b)   Arbitration. In the event that the Parties are unable to
                  settle any such dispute within thirty (30) days of its
                  submission in writing by one of the Parties, any such disputes
                  shall be settled by final and binding arbitration in
                  accordance with the R.O.C. Arbitration Law. The first arbitral
                  proceeding shall take place within one hundred twenty (120)
                  days after the due constitution of the Tribunal.

            (c)   Place of Arbitration. The place of arbitration shall be in
                  Taipei, Taiwan.

            (d)   Dispute Resolution. The arbitration shall be heard and
                  determined by a tribunal consisting of three (3) arbitrators
                  (the "Tribunal"). Each Party shall appoint one arbitrator, and
                  the Party-appointed arbitrators shall jointly appoint a third
                  arbitrator who shall be the presiding arbitrator.

            (e)   Binding Effect. The decision made by the Tribunal shall be
                  final and binding on all Parties, and all Parties shall act
                  accordingly.

            (f)   Costs and Awards. The cost of arbitration shall be equally
                  borne by the Parties, unless otherwise decided by the
                  Tribunal, and each Party shall bear its own legal fees in
                  connection with the arbitration proceeding. The award shall be
                  made and shall be payable in U.S. dollars free of any tax or
                  any other deduction. The award shall include interest from the
                  date of any breach or other violation of this

                                                                            -43-



                  Agreement. The Tribunal shall also fix an appropriate rate of
                  interest from the date of the breach or other violation to the
                  date when the award is paid in full.

            (g)   Language. The English language shall be the prevailing
                  language in the arbitral proceeding, and if testimony,
                  evidence or other material presented at the arbitral
                  proceeding is in a language other than English, the
                  translation thereof into English shall prevail. All hearing
                  pleadings, statements of claim or defense, awards and the
                  reasons supporting them shall be written in English.

            (h)   Continuing Performance. During such consultation or
                  arbitration, the Parties shall, with the exception of matters
                  in dispute, continue to perform their respective obligations
                  pursuant to the provisions of this Agreement.

Section H.6 FURTHER ASSURANCES.

            (a)   The Parties agree (i) to furnish upon request to each other
                  such further information, (ii) to execute and deliver to each
                  other such other documents, and (iii) to do such other acts
                  and things, all as the other Party may reasonably request for
                  the purpose of carrying out the intent of this Agreement and
                  the documents referred to in this Agreement.

            (b)   In the event and for so long as any Party actively is
                  contesting or defending against any action, suit, proceeding,
                  hearing, investigation, charge, complaint, claim, or demand in
                  connection with (i) the Basic Transaction, (ii) the
                  Purchaser's exercise of the Option or (iii) any fact,
                  situation, circumstance, status, condition, activity,
                  practice, plan, occurrence, event, incident, action, failure
                  to act, or transaction on or prior to the Closing Date
                  involving the Company, each of the other parties will
                  cooperate with it and its counsel in the contest or defense,
                  make available their personnel, and provide such testimony and
                  access to their books and records as shall be necessary in
                  connection with the contest or defense, all at the sole cost
                  and expense of the contesting or defending party (unless the
                  contesting or defending party is entitled to indemnification
                  therefor under Article VI above).

Section H.7 WAIVER. The rights and remedies of the Parties to this Agreement are
            cumulative and not alternative. Neither the failure nor any delay by
            any Party in exercising any right, power, or privilege under this
            Agreement or the documents referred to in this Agreement will
            operate as a waiver of such right, power, or privilege, and no
            single or partial exercise of any such right, power, or privilege
            will preclude any other or further exercise of such right, power, or
            privilege or the exercise of any other right, power, or privilege.
            To the maximum extent permitted by applicable law, (a) no claim or
            right arising out of this Agreement or the documents referred to in
            this Agreement can be discharged by one Party, in whole or in part,
            by a waiver or renunciation of the claim or right unless in writing
            signed by the other Party; (b) no waiver that may be given by a
            Party will be applicable except in the specific instance for which
            it is given; and (c) no notice to or demand on one party will be
            deemed to be a waiver of any obligation of such Party or of the
            right of the Party giving such notice or demand to take further
            action without notice or demand as provided in this Agreement or the
            documents referred to in this Agreement.

Section H.8 ENTIRE AGREEMENT AND MODIFICATION. This Agreement supersedes all
            prior agreements between the Parties with respect to its subject
            matter and constitutes (along with the documents referred to in this
            Agreement) a complete and exclusive statement of the terms

                                                                            -44-



             of the agreement between the Parties with respect to its subject
             matter. This Agreement may not be amended or modified except by a
             written agreement executed by the Party to be charged with the
             amendment or modification.

Section H.9  DISCLOSURE SCHEDULES.

             (a)   The disclosures in the Disclosure Schedules, and those in any
                   supplement thereto, must relate only to the representations
                   and warranties in the Section of the Agreement to which they
                   expressly relate and not to any other representation or
                   warranty in this Agreement.

             (b)   In the event of any inconsistency between the statements in
                   the body of this Agreement and those in the Disclosure
                   Schedules (other than an exception expressly set forth as
                   such in the Disclosure Schedules with respect to a
                   specifically identified representation or warranty), the
                   statements in the body of this Agreement will control.

Section H.10 ASSIGNMENTS, SUCCESSORS, AND NO THIRD-PARTY RIGHTS. None of
             the Parties may assign any of its rights under this Agreement
             without the prior consent of the other Parties, which will not be
             unreasonably withheld, except that the Purchaser may assign any of
             its rights under this Agreement to any Related Person of the
             Purchaser. Subject to the preceding sentence, this Agreement will
             apply to, be binding in all respects upon, and inure to the benefit
             of the successors and permitted assigns of the Parties. Nothing
             expressed or referred to in this Agreement will be construed to
             give any Person other than the Parties to this Agreement any legal
             or equitable right, remedy, or claim under or with respect to this
             Agreement or any provision of this Agreement. This Agreement and
             all of its provisions and conditions are for the sole and exclusive
             benefit of the Parties and their successors and assigns.

Section H.11 SEVERABILITY. If any provision of this Agreement is held
             invalid or unenforceable by any court of competent jurisdiction,
             the other provisions of this Agreement will remain in full force
             and effect. Any provision of this Agreement held invalid or
             unenforceable only in part or degree will remain in full force and
             effect to the extent not held invalid or unenforceable.

Section H.12 SECTION HEADINGS, CONSTRUCTION. The headings of sections in
             this Agreement are provided for convenience only and will not
             affect its construction or interpretation. All references to a
             section ("Section ") or sections ("Section ") refer to the
             corresponding section or sections of this Agreement. All words used
             in this Agreement will be construed to be of such gender or number
             as the circumstances require. Unless otherwise expressly provided,
             the word "including" does not limit the preceding words or terms.

Section H.13 TIME OF ESSENCE. With regard to all dates and time periods set
             forth or referred to in this Agreement, time is of the essence.

Section H.14 GOVERNING LAW. This Agreement will be governed by the laws of
             the Republic of China without regard to conflicts of laws
             principles.

Section H.15 COUNTERPARTS. This Agreement may be executed in one or more
             counterparts, each of which will be deemed to be an original copy
             of this Agreement and all of which, when taken together, will be
             deemed to constitute one and the same agreement.

                                                                            -45-



                                   SCHEDULE I

                      PRE-CLOSING COVENANTS OF THE COMPANY

            The Company covenants and agrees with the Purchaser that, at all
times after the date of execution of this Agreement and before the earlier of
the Closing Date or the termination of this Agreement, the Company shall comply
with all covenants and provisions of this Schedule I applicable to it, except to
the extent that the Purchaser may otherwise consent in writing.

SECTION I.1 ACCESS AND INVESTIGATION.

            (a)   Between the date of execution of this Agreement and the
                  Closing Date, the Company and its Representatives will (i)
                  afford the Purchaser and its Representatives reasonable access
                  to the Company's Representatives, properties, contracts, books
                  and records, and other documents and data, (ii) furnish the
                  Purchaser and Purchaser's Representatives with copies of all
                  such contracts, books and records, and other documents and
                  data as the Purchaser may reasonably request, (iii) furnish
                  the Purchaser and the Purchaser's Representatives with such
                  additional financial, operating, and other data and
                  information as the Purchaser may reasonably request, (iv)
                  instruct the Representatives of the Company to cooperate, to
                  the extent reasonable, with the Purchaser and its
                  Representatives in its investigation of the Company, and (v)
                  otherwise cooperate with the investigation by the Purchaser
                  and the Purchaser Representatives, and shall authorize
                  independent certified public accountants of the Company to
                  permit the Purchaser and Purchaser's Representatives to
                  examine all accounting records and working papers pertaining
                  to the Financial Information. The Purchaser and the Company
                  will coordinate such activities in a manner so as to eliminate
                  or reduce the disruption to the Company's businesses resulting
                  therefrom.

            (b)   No investigation pursuant to this Section I.1 shall affect or
                  be deemed to modify any representation or warranty made by the
                  Company or the Sellers.

SECTION I.2 OPERATION OF THE BUSINESS OF THE COMPANY. Between the date of the
            execution of this Agreement and the Closing Date, the Company will:

            (a)   conduct the business of the Company only in the Ordinary
                  Course of Business and otherwise refrain from any
                  extraordinary transactions;

            (b)   use its best efforts to preserve intact the current business
                  organizations of the Company, keep available the services of
                  the current officers, employees, and agents of the Company;
                  and maintain the relations and goodwill with suppliers,
                  customers, landlords, creditors, employees, agents, and others
                  having business relationships with the Company; and

            (c)   report periodically to the Purchaser concerning the status of
                  the business, operations, and finances of the Company.

SECTION I.3 NEGATIVE COVENANT. Except as otherwise expressly permitted by this
            Agreement, between the date of the execution of this Agreement and
            the Closing Date, the Company will not without the prior written
            consent of the Purchaser, take any affirmative action, or fail to

                                                                            -46-



            take any reasonable action as a result of which any of the changes
            or events listed in Section C.17 will occur.

SECTION I.4 REQUIRED APPROVALS; COOPERATION.

            (a)   As promptly as practicable after the date of this Agreement,
                  the Company will (i) make all filings and obtain all
                  approvals, authorizations, consents and clearances required by
                  Legal Requirements to be made by each of them in order to
                  consummate the Basic Transaction and (ii) obtain all approvals
                  and consents required of any Person to consummate the Basic
                  Transaction.

            (b)   Between the date of the execution of this Agreement and the
                  Closing Date, the Company will (i) cooperate with the
                  Purchaser with respect to all filings that the Purchaser
                  elects to make or are required by Legal Requirements to make
                  in connection with the Basic Transaction, and (ii) cooperate
                  with the Purchaser in obtaining all consents identified in
                  Section E.2 of the Purchaser Disclosure Schedule.

Section I.5 NOTIFICATION. The Company will notify the Purchaser promptly in
            writing of, and contemporaneously will provide the Purchaser with
            true and complete copies of any and all information or documents
            relating to, and will use best efforts to cure before the Closing
            Date, any event, transaction, or circumstance occurring after the
            date of the execution of this Agreement that causes or will cause
            any covenant or agreement of the Company under this Agreement to be
            breached, or that renders or will render untrue any representation
            or warranty of the Company and/or the Sellers contained in this
            Agreement as if the same were made on or as of the date of such
            event, transaction, or circumstance. The Company also will use Best
            Efforts to cure, before the Closing Date, any violation or breach of
            any representation, warranty, covenant, or agreement made by the
            Company and/or the Sellers in this Agreement, whether occurring or
            arising before or after the date of the execution of this Agreement.
            No disclosure by the Company and/or the Sellers pursuant to this
            Section I.5, however, shall be deemed to amend or supplement the
            Company Disclosure Schedule, or to prevent or cure any
            misrepresentation or breach of warranty, unless consented to in
            writing by the Purchaser.

SECTION I.6 FURTHER ASSURANCES. The Company will use its best efforts to take
            all action and to do all things reasonably necessary, proper or
            advisable in order to consummate the Basic Transaction (including
            satisfaction, but not waiver, of the closing conditions set forth in
            Schedules F and G).

                                                                            -47-


                             AMKOR TECHNOLOGY, INC.
                             1345 ENTERPRISE DRIVE
                         WEST CHESTER, PA 19380, U.S.A.

                                  July 9, 2004

Unitive Semiconductor Taiwan Corporation
39 Kuang-Fu North Road
Hsin Chu Hsien, Taiwan, ROC
Attn:   Ray C. Chang, as Chairman and Sellers' Representative

        RE:    Amendment to Stock Purchase Agreement and Loan Agreement

Dear Ray:

      This letter (this "Letter") is to confirm our understanding that Unitive
Semiconductor Taiwan Corporation ("UST") and the certain shareholders who have
authorized you to be the Seller's Representative (the "Sellers") have agreed to
the following matters with respect to the Loan Agreement dated as of June 3,
2004 by and between Amkor Technology, Inc. ("Amkor") and UST (the "Loan
Agreement") and the Stock Purchase Agreement dated as of June 3, 2004 by and
among Amkor, the Sellers and UST (the "SPA"). Terms not defined herein have the
meanings ascribed thereto in the SPA.

      UST, the Sellers and Amkor hereby agree as follows:

      1. Sections 1.4 and 5.1(b) of the SPA shall be amended to replace "July 2,
2004" with "August 20, 2004". Accordingly, Section 5 of the Loan Agreement shall
not come into effect, if at all, until August 20, 2004.

      2. Section 4.1 of the SPA shall be deleted in its entirety and shall be
replaced with the following text:

      "Not later than the Closing Date, the Company shall have called a
      shareholders meeting and have elected the directors and supervisors in
      accordance with the terms of the Amended Joint Venture Agreement. As soon
      as practicable after the Closing, the newly elected directors shall
      convene a meeting of the Board of Directors to elect one director
      representative of the Purchaser as Chairman of the Company."

      3. After the execution of this Letter and before the Closing, Amkor shall
in good faith work with UST and the banks with which UST has outstanding loan
obligations to investigate into and determine the most suitable form of
guarantee or substitute arrangement acceptable by Amkor and the banks to replace
Ray Chang's and Daniel Teng's existing personal guarantees. Substitute
arrangements may include, and are not limited to, indemnification of Ray Chang
and Daniel Teng and seeking alternative sources of financing to replace the
existing bank loans. As soon as practicable after the

                                       1



Closing, but no later than three (3) months after the Closing, Amkor shall put
such replacement guarantees or substitute arrangements into effect. During the
time between the Closing and the time that such replacement guarantees or
substitute arrangements are put into effect. Amkor shall indemnify Ray Chang and
Daniel Teng for claims from the banks arising out of their personal guarantees.
These indemnity obligations shall be set forth in a form of indemnity letter
with terms satisfactory to Amkor, Ray Chang and Daniel Teng which shall provide,
among other things, that no loan payments shall be made by UST, Ray Chang or
Daniel Teng without Amkor's approval.

      4. The Amended Joint Venture Agreement and Escrow Agreement shall be
executed on or before the Closing by UST, Amkor and the Sellers' Representatives
in substantially the form attached hereto.

      In the event of any conflict or inconsistency between the Loan Agreement
and this Letter or between the SPA and this Letter, this Letter shall prevail
and control. Except as amended hereby, each of the SPA and Loan Agreement
remains in full force and effect. This Letter may be executed simultaneously in
two or more counterparts and by different parties hereto on separate
counterparts, each of which shall be deemed an original, but all of which
together shall constitute one and the same instrument. This Letter shall be
governed by and construed under the laws of the Republic of China, and in the
event of a dispute, Section H.5 of the SPA (Resolution of Disputes) shall apply
to the parties hereto.

                                                Sincerely,

                                                AMKOR TECHNOLOGY, INC.

                                                By: /s/ Oleg Khaykin
                                                   --------------------------
                                                Name: OLEG  KHAYKIN
                                                Its: EVP, Corp. Dev.

   [Remainder of page intentionally left blank; Acknowledgement page follows.]

                                       2


AGREED AND ACCEPTED:

UNITIVE SEMICONDUCTOR                        SELLERS' REPRESENTATIVE
TAIWAN CORPORATION                           ON BEHALF OF EACH SELLER

BY: /s/ Ray C. Chang                         By: /s/ Ray C. Chang
   ---------------------                        -------------------------
Name: Ray C. Chang                           Name: Ray C. Chang
Its: Chairman  '                             Their: Attorney-in-Fact

                                       3