EXHIBIT 4.9aaaa

               TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LIMITED
                        2004 EMPLOYEE STOCK OPTIONS PLAN
                                  (TRANSLATION)


1.    PURPOSE

      The purpose of the 2004 Employee Stock Options Plan (the "Plan") of Taiwan
      Semiconductor Manufacturing Company Limited (the "Company") is to promote
      the interests of the Company and its shareholders by attracting and
      retaining the high-tech talents/professionals of the Company and its
      subsidiaries by means of incentives in the form of stock options.

2.    PERIOD OF GRANT

      The Company may grant the options in one or more tranches within one (1)
      year from the date of receipt of notice from the relevant authority
      ("Authority") indicating that the Company's filing of the Plan with the
      Authority has become effective. The actual dates of grant will be
      determined by the Chairman of the Board of Directors of the Company (the
      "Chairman").

3.    OPTIONEE

      Each optionee shall be a full-time employee of either the Company or any
      of its domestic or foreign subsidiaries, in which the Company's
      shareholding with voting rights, directly or indirectly, is more than
      fifty percent (50%). Whether an employee is entitled to receive options,
      and the number of options to be received, shall be reviewed and determined
      by the Chairman taking into consideration factors as relates to job grade,
      performance, contribution, special achievement and/or years of employment,
      subject to approval by the Compensation Committee of the Board of
      Directors of the Company. The number of options granted to any optionee in
      any tranche shall not exceed ten percent (10%) of the total number of
      options granted in that tranche, and the total number of options to be
      exercised by any optionee within each fiscal year shall not exceed one
      percent (1%) of the outstanding common shares of the Company at the
      year-end.

4.    TOTAL NUMBER OF OPTIONS TO BE GRANTED

      The total number of options authorized to be granted with respect to the
      Plan shall be 11,000,000 units, with one (1) unit entitled to subscribe
      one (1) common share of the Company. The total number of common shares of
      the Company to be reserved for granting the options shall be 11,000,000
      shares.

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5.    TERMS AND CONDITIONS

      (1)   Exercise Price
            The exercise price of the options shall be the closing price of the
            Company's common shares on the date that the options are granted.

      (2)   Vesting Schedule
            The options will not vest in the first two (2) years ("Waiting
            Period") and may be exercised in accordance with the following
            schedule. The options will be existent for ten (10) years and may
            not be transferred, except by inheritance.

 
 
            Number of Years after         Accumulated Percentage of
            the Date the Options are      Options Exercisable
            Granted
                                                    
                     2 years                            50%
                     3 years                            75%
                     4 years                           100%
 

      (3)   Type of Shares Underlying the Options
            The common shares of the Company shall be the underlying shares.

      (4)   After the Company grants options to an optionee, the Company shall
            have the right to revoke and cancel unvested options in the event
            that the optionee commits serious misconduct and violates the
            employment contract or policies of the Company.

      (5)   Termination of Employment
            If an optionee's employment with the Company is terminated, the
            optionee shall exercise options in accordance with the following
            provisions, subject to the ten-year limit set forth in Paragraph
            5(2) above:

            a.    Voluntary Termination or Terminated for Cause by the
                  Company in Accordance with Labor Law of ROC -- Options vested
                  in accordance with the schedule set forth in Paragraph 5(2)
                  above shall be exercised within three (3) months from the
                  employment termination date. Unvested options shall become
                  invalid on the employment termination date.

            b.    Retirement -- All options granted are exercisable subject to
                  the Waiting Period, regardless of the vesting schedule set
                  forth in Paragraph 5(2) above. Nevertheless, the optionee
                  shall exercise all options within one (1) year from the later
                  of: (x) the date of retirement; or, (y) the end of the Waiting
                  Period.

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            c.    Temporarily on Leave Without Pay --
                  In case the optionee is approved to be temporarily on leave
                  without pay, vested options shall be exercised within three
                  (3) months from the effective date of the temporary leave;
                  otherwise, the right to exercise options shall be deferred
                  until the optionee's reinstatement. For unvested options, the
                  accumulation of years of employment with respect to the
                  vesting schedule set forth in Paragraph 5(2) above shall
                  suspend during the period of the optionee's temporary leave
                  and shall resume after the optionee's reinstatement, subject
                  to the ten-year limit set forth in Paragraph 5(2) above.

            d.    Death --
                  Options vested in accordance with the schedule set forth in
                  Paragraph 5(2) above shall be exercised by the optionee's
                  inheritor within one (1) year from the death of the optionee.
                  Unvested options shall expire and become invalid upon the
                  death of the optionee.

            e.    Death or Disability Caused by Work Injury --

                  (a)    Regardless of the vesting schedule set forth in
                         Paragraph 5(2) above, all options granted are
                         exercisable upon the departure of the optionee from the
                         Company due to any disability caused by work injury,
                         subject only to the Waiting Period. Nevertheless, the
                         optionee shall exercise the options within one (1) year
                         from the later of: (x) the date of departure; or, (y)
                         the end of the Waiting Period.

                  (b)    Regardless of the vesting schedule set forth in
                         Paragraph 5(2) above, all options granted are
                         exercisable by the optionee's inheritor upon the death
                         of the optionee, which is caused by work injury,
                         subject only to the Waiting Period. Nevertheless, the
                         inheritor shall exercise the options within one (1)
                         year from the later of: (x) the death of the optionee;
                         or, (y) the end of the Waiting Period.

            f.    Transfer to Affiliates --
                  In case the optionee is transferred to an affiliate due to the
                  necessity of the operations of the Company, the rights and
                  obligations of the options granted shall not be affected by
                  such transfer.

            g.    Severance/Layoff in Accordance with Labor Law of ROC --
                  Options vested in accordance with the schedule set forth in
                  Paragraph 5(2) above shall be exercised within three (3)
                  months from the effective date of the severance/layoff (other
                  than situations set forth in Paragraph

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                  5(5) a above). Unvested options shall become invalid upon the
                  effective date of the severance/layoff; or, may be exercised
                  in accordance with a schedule determined by the Chairman based
                  on the schedule set forth in Paragraph 5(2) above, which shall
                  be subsequently approved by the Compensation Committee of the
                  Board of Directors of the Company.

            h.    If the optionee or his/her inheritor is unable to exercise the
                  options within the periods set forth above, the unexercised
                  options shall expire and become invalid.

      (6)   Invalidated Options

            Any invalidated options shall be cancelled.

6.    UNDERLYING SHARES

      The Company will issue new common shares of the Company as the underlying
      shares.

7.    ADJUSTMENTS OF THE EXERCISE PRICE

      (1)   The exercise price shall be subject to adjustment in accordance with
            the following formula, to be rounded to the tenth, upon the
            occurrence of changes in paid-in capital of the Company as a result
            of capitalization of retained earnings or capital reserves.

            NEP = OEP x [N/(N + n)]

            Where:      NEP =       the exercise price after such adjustment

                        OEP =       the exercise price before such adjustment

                        N =         the number of outstanding common shares
                                    (the number of treasury shares which have
                                    not been transferred or cancelled shall be
                                    deducted.)

                        n =         the number of new common shares arising from
                                    the capitalization of retained earnings or
                                    capital reserves

      The exercise price will not be adjusted in case of issuance of new common
      shares in connection with mergers.

      (2)   The exercise price shall be subject to adjustment in accordance with
            the following formula, to be rounded to the tenth, upon the
            occurrence of capital reduction except where such reduction occurs
            as a result of treasury stock cancellation.

            NEP = OEP x [((M-C)/M) x (N/n)]

            Where:      NEP =       the exercise price after such adjustment

                        OEP =       the exercise price before such adjustment

                        M =         the closing price as of the last trading day
                                    before the capital reduction

                        C =         the amount of cash distributed per common
                                    share, if any

                        N =         the number of outstanding common shares
                                    before the capital reduction

                        n =         the number of outstanding common shares
                                    after the capital reduction

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8.    ADJUSTMENTS OF NUMBER OF OPTIONS

      (1)   Upon the occurrence of the Company's capitalization of retained
            earnings or capital reserves, in addition to adjusting the exercise
            price in accordance with provisions set forth in Paragraph 7(1)
            above, the Company will issue additional options in proportion to
            the increase of paid-in capital (only integral options will be
            issued and any fractional options resulting therefrom will be
            disregarded) at the adjusted price to holders of existing unvested
            or unexercised options, provided that there are sufficient common
            shares reserved for granting the options as specified in the
            Articles of Incorporation of the Company.

      (2)   Upon the occurrence of the Company's capital reduction except where
            such reduction occurs as a result of treasury stock cancellation, in
            addition to adjusting the exercise price in accordance with the
            provisions set forth in Paragraph 7(2) above, the Company will
            reduce existing unvested or unexercised options in proportion to the
            increase of exercise price (any fractional options resulting
            therefrom will be disregarded).

9.    PROCEDURES FOR EXERCISING OPTIONS

      (1)   Except during a period in which the shareholders' book is closed in
            accordance with relevant laws; or, the period from three (3)
            business days prior to the date of public announcement to close
            shareholders' book for stock dividends, cash dividends, or rights
            offering filed by the Company with the Taiwan Stock Exchange
            Corporation to the record date, optionee may exercise options in
            accordance with the vesting schedule set forth in Paragraph 5(2)
            above by submitting a written notice (the "Exercise Notice") to the
            Company to purchase the newly issued common shares of the Company.

      (2)   The Company shall inform the optionee of the payment for exercising
            the options to a designated bank upon the receipt of the Exercise
            Notice. The Exercise Notice shall not be withdrawn once the payment
            has been made.

      (3)   The transfer agent of the Company shall register the optionee and
            his/her

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            shares in the shareholders record upon the Company's confirmation of
            the payment and shall book transfer common shares of the Company to
            the optionee within five (5) business days. The common shares so
            issued are tradable on the Taiwan Stock Exchange upon delivery to
            the optionee.

      (4)   The Company shall file the change in the paid-in capital with the
            relevant authority once each quarter.

10.   RIGHTS AND OBLIGATIONS AFTER EXERCISING OPTIONS

      The holders of common shares of the Company issued after options are
      exercised shall have the same rights, obligations and privileges as
      holders of common shares of the Company.

11.   MISCELLANEOUS

      (1)   The Plan shall become effective upon obtaining approval from the
            Board of Directors of the Company and the Authority. Prior to the
            grant of options, any amendments to the Plan shall become effective
            upon obtaining approval from the Board of Directors of the Company
            and reporting such amendments to the Authority.

      (2)   Any other matters not set forth in the Plan shall be dealt with in
            accordance with the applicable laws and regulations.

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