EXHIBIT 4.3

                            LAM RESEARCH CORPORATION

                        1984 EMPLOYEE STOCK PURCHASE PLAN




     The following constitute the provisions of the 1984 Employee Stock Purchase
Plan of Lam Research Corporation.

     1.   PURPOSE.  The purpose of the Plan is to provide employees of the
Company and its Designated Subsidiaries with an opportunity to purchase Common
Stock of the Company through accumulated payroll deductions.  It is the
intention of the Company to have the Plan qualify as an "Employee Stock Purchase
Plan" under Section 423 of the Internal Revenue Code of 1986, as amended.  The
provisions of the Plan shall, accordingly, be construed so as to extend and
limit participation in a manner consistent with the requirements of that section
of the Code.

     2.   DEFINITIONS.

          (a)  "BOARD" shall mean the Board of Directors of the Company.

          (b)  "CODE" shall mean the Internal Revenue Code of 1986, as amended.

          (c)  "COMMITTEE" shall mean the Committee appointed by the Board in
accordance with Section 13 of the Plan, if one is appointed.

          (d)  "COMMON STOCK" shall mean the Common Stock of the Company.

          (e)  "COMPANY" shall mean Lam Research Corporation, a Delaware
corporation.

          (f)  "COMPENSATION" shall mean all regular straight time gross
earnings, exclusive of payments for overtime, shift premium, incentive
compensation, incentive payments, bonuses, commissions or other compensation.

          (g)  "CONTINUOUS STATUS AS  AN EMPLOYEE"  shall  mean  the absence of
any interruption or termination of service as an Employee. Continuous Status as
an Employee shall not be considered interrupted in the case of a leave of
absence agreed to in writing by the Company, provided that such leave is for a
period of not more than 90 days or re-employment upon the expiration of such
leave is guaranteed by contract or statute.

          (h)  "DESIGNATED SUBSIDIARIES" shall mean the Subsidiaries which have
been designated by the Board from time to time in its sole discretion as
eligible to participate in the Plan.

          (i)  "EMPLOYEE" shall mean any person, including an officer, who is
customarily employed for at least twenty (20) hours per week and more than five
(5) months in a calendar year by the Company or one of its Designated
Subsidiaries.

          (j)  "EXERCISE DATE" shall mean the last day of each offering period
of the plan.

          (k)  "OFFERING DATE" shall mean the first day of each offering period
of the Plan.

          (l)  "PLAN" shall mean this 1984 Employee Stock Purchase Plan.


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          (m)  "SUBSIDIARY" shall mean a corporation, domestic or foreign, of
which not less than 50% of the voting shares are held by the Company or a
Subsidiary, whether or not such corporation now exists or is hereafter organized
or acquired by the Company or a Subsidiary.

     3.   ELIGIBILITY.

          (a)  Any Employee who is an Employee as of the Offering Date of a
given offering period shall be eligible to participate in such Offering Period
under the Plan, subject to the requirements of paragraph 5(a) and the
limitations imposed by Section 423(b) of the Code.

          (b)  Any provisions of the Plan to the contrary notwithstanding, no
Employee shall be granted an option under the Plan (i) if, immediately after the
grant, such Employee [or any other person whose stock would be attributed to
such Employee pursuant to Section 425(d) of the Code] would own stock and/or
hold outstanding options to purchase stock possessing five percent (5%) or more
of the total combined voting power or value of all classes of stock of the
Company or of any subsidiary of the Company, or (ii) which permits his rights to
purchase stock under all employee stock purchase plans of the Company and its
subsidiaries to accrue at a rate which exceeds Twenty-Five Thousand Dollars
($25,000) of fair market value of such stock (determined at the time such option
is granted) for each calendar year in which such option is outstanding at any
time.

     4.   OFFERING PERIODS.  The Plan shall be implemented by one offering
during each offering period of the Plan, commencing on or about January 1, 1985,
and continuing thereafter until terminated in accordance with paragraph 19
hereof.  Initially, the duration of each offering period shall be six months.
The Board or the Committee shall have the power to change the duration of
offering periods with respect to future offerings without stockholder approval
if such change is announced at least fifteen (15) days prior to the scheduled
beginning of the first offering period to be affected.

     5.   PARTICIPATION.

          (a)  An eligible Employee may become a participant in the Plan by
completing a subscription agreement authorizing payroll deduction on the form of
Exhibit A to this Plan and filing it with the Company's payroll office prior to
the applicable Offering Date, unless a later time for filing the subscription
agreement is set by the Board or the Committee for all eligible Employees with
respect to a given offering.

          (b)  Payroll deductions for a participant shall commence on the first
payroll following the Offering Date and shall end on the Exercise Date of the
offering to which such authorization is applicable, unless sooner terminated by
the participant as provided in paragraph 10.

     6.   PAYROLL DEDUCTIONS.

          (a)  At the time a participant files his subscription agreement, he
shall elect to have payroll deductions made on each payday during the offering
period in an amount not exceeding five percent (10%) of the Compensation which
he receives on each payday during the offering period, and the aggregate of such
payroll deductions during the offering period shall not exceed five percent
(10%) of his aggregate Compensation during said offering period.

          (b)  All payroll deductions made by a participant shall be credited to
his account under the Plan.  A participant may not make any additional payments
into such account.

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          (c)  A participant may discontinue his participation in the Plan as
provided in paragraph 10, or may lower, but not increase, the rate of his
payroll deductions during the offering period by completing or filing with the
Company a new subscription agreement authorizing a change in payroll deduction
rate.  The change in rate shall be effective fifteen (15) days following the
Company's receipt of the new subscription agreement.

     7.   GRANT OF OPTION.

          (a)  On the Offering Date of each offering period, each eligible
Employee participating in the Plan shall be granted an option to purchase (at
the per share option price) up to a number of shares of the Company's Common
Stock determined by dividing such Employee's payroll deductions accumulated
during such offering period by the lower of (i) eighty-five percent (85%) of the
fair market value of a share of the Company's Common Stock on the Offering Date,
or (ii) eighty-five percent (85%) of the fair market value of a share of the
Company's Common Stock on the Exercise Date; provided that in no event shall an
Employee be permitted to purchase during each offering period more than a number
of shares determined by dividing $12,500 by the fair market value of a share of
the Company's Common Stock on the Offering Date, and provided further that such
purchase shall be subject to the limitations set forth in Section 3(b) and 12
hereof. Fair market value of a share of the Company's Common Stock shall be
determined as provided in Section 7(b) herein.

          (b)  The option price per share of the shares offered in a given
offering period shall be the lower of:  (i) 85% of the fair market value of a
share of the Common Stock of the Company on the Offering Date; or (ii) 85% of
the fair market value of a share of the Common Stock of the Company on the
Exercise Date.  The fair market value of the Company's Common Stock on a given
date shall be determined by the Board or the Committee in its discretion;
provided, however, that where there is a public market for the Common Stock, the
fair market value per Share shall be the mean of the bid and asked prices [or
the closing price per share if the Common Stock is listed on the National
Association of Securities Dealers Automated Quotation ("NASDAQ") National Market
System] of the Common Stock for such date, as reported in the Wall Street
Journal (or, if not so reported, as otherwise reported by the NASDAQ System) or,
in the event the Common Stock is listed on a stock exchange, the fair market
value per Share shall be the closing price on such exchange on such date, as
reported in the Wall Street Journal.

     8.   EXERCISE OF OPTION.  Unless a participant withdraws from the Plan
as provided in paragraph 10, his option for the purchase of shares will be
exercised automatically on the Exercise Date of the offering period, and the
maximum number of full shares subject to option will be purchased for him at the
applicable option price with the accumulated payroll deductions in his account.
The shares purchased upon exercise of an option hereunder shall be deemed to be
transferred to the participant on the Exercise Date.  During his lifetime, a
participant's option to purchase shares hereunder is exercisable only by him.

     9.   DELIVERY.  As promptly as practicable after the Exercise Date of each
offering, the Company shall arrange the delivery to each participant, as
appropriate, of a certificate representing the shares purchased upon exercise of
his option.  Any cash remaining to the credit of a participant's account under
the Plan after a purchase by him of shares at the termination of each offering
period, or which is insufficient to purchase a full share of Common Stock of the
Company, shall be returned to said participant.

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     10.  WITHDRAWAL; TERMINATION OF EMPLOYMENT.

          (a)  A participant may withdraw all but not less than all the payroll
deductions credited to his account under the Plan at any time prior to the
Exercise Date of the offering period by giving written notice to the Company in
the form of Exhibit B to this Plan.  All of the participant's payroll deductions
credited to his account will be paid to him promptly after receipt of his notice
of withdrawal and his option for the current period will be automatically
terminated, and no further payroll deductions for the purchase of shares will be
made during the offering period.

          (b)  Upon termination of the participant's Continuous Status as an
Employee prior to the Exercise Date of the offering period for any reason,
including retirement or death, the payroll deductions credited to his account
will be returned to him or, in the case of his death, to the person or persons
entitled thereto under paragraph 14, and his option will be automatically
terminated.

          (c)  In the event an Employee fails to remain in  Continuous Status as
an Employee for at least twenty (20) hours per week during the offering period
in which the employee is a participant, he will be deemed to have elected to
withdraw from the Plan and the payroll deductions credited to his account will
be returned to him and his option terminated.

          (d)  A participant's withdrawal from an offering will not have any
effect upon his eligibility to participate in a succeeding offering or in any
similar plan which may hereafter be adopted by the Company.

     11.  INTEREST.  No interest shall accrue on the payroll deductions of a
participant in the Plan.

     12.  STOCK.

          (a)  The maximum number of shares of the Company's Common Stock which
shall be made available for sale under the Plan shall be 1,337,500 shares,
subject to adjustment upon changes in capitalization of the Company as provided
in paragraph 18.  If the total number of shares which would otherwise be subject
to options granted pursuant to Section 7(a) hereof on the Offering Date of an
offering period exceeds the number of shares then available under the Plan
(after deduction of all shares for which options have been exercised or are then
outstanding), the Company shall make a pro rata allocation of the shares
remaining available for option grant in as uniform a manner as shall be
practicable and as it shall determine to be equitable.  In such event, the
Company shall give written notice of such reduction of the number of shares
subject to the option to each Employee affected thereby and shall similarly
reduce the rate of payroll deductions, if necessary.

          (b)  The participant will have no interest or voting right in shares
covered by his option until such option has been exercised.

          (c)  Shares to be delivered to a participant under the Plan will be
registered in the name of the participant or in the name of the participant and
his spouse or, beginning with the offering period ending June 8, 1990, in the
name of the participant and any joint tenant(s) designated by the participant.

     13.  ADMINISTRATION.  The Plan shall be administered by the Board of the
Company or a committee of one or more persons appointed by the Board.  The
administration, interpretation or application of the Plan by the Board or its
committee shall be final, conclusive and binding upon all participants.  Members
of the Board and other persons who are eligible Employees are permitted to
participate in the Plan, provided that:

          (a)  No person who is eligible to participate in the Plan may vote on
any matter affecting the administration of the Plan or the grant of any option
pursuant to the Plan.

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          (b)  If a Committee is established to administer the Plan, no person
who is eligible to participate in the Plan may be a member of the Committee.

     14.  DESIGNATION OF BENEFICIARY.

          (a)  A participant may file a written designation of a beneficiary who
is to receive any shares and cash, if any, from the participant's account under
the Plan in the event of such participant's death subsequent to the end of the
offering period but prior to the delivery to him of such shares and cash.  In
addition, a participant may file a written designation of a beneficiary who is
to receive any cash from the participant's account under the Plan in the event
of such participant's death prior to the Exercise Date of the offering period.

          (b)  Such designation of beneficiary may be changed by the participant
at any time by written notice.  In the event of the death of a participant and
in the absence of a beneficiary validly designated under the Plan who is living
at the time of such participant's death, the Company shall deliver such shares
and/or cash to the executor or administrator of the estate of the participant,
or if no such executor or administrator has been appointed (to the knowledge of
the Company), the Company, in its discretion, may deliver such shares and/or
cash to the spouse or to any one or more dependents or relatives of the
participant or, if no spouse, dependent or relative is known to the Company,
then to such other person as the Company may designate.

     15.  TRANSFERABILITY.  Neither payroll deductions credited to a
participant's account nor any rights with regard to the exercise of an option or
to receive shares under the Plan may be assigned, transferred, pledged or
otherwise disposed of in any way (other than by will, the laws of descent and
distribution or as provided in paragraph 14 hereof) by the participant.  Any
such attempt at assignment, transfer, pledge or other disposition shall be
without effect, except that the Company may treat such act as an election to
withdraw funds in accordance with paragraph 10.

     16.  USE OF FUNDS.  All payroll deductions received or held by the Company
under the Plan may be used by the Company for any corporate purpose, and the
Company shall not be obligated to segregate such payroll deductions.


     17.  REPORTS.  Individual accounts will be maintained for each participant
in the Plan.  Statements of account will be given to participating Employees
promptly following each Exercise Date, which statements will set forth the
amounts of payroll deductions, the per share purchase price, the number of
shares purchased and the remaining cash balance, if any.

     18.  ADJUSTMENTS UPON CHANGES IN CAPITALIZATION.  Subject to any required
action by the stockholders of the Company, the number of shares of Common Stock
covered by each option under the Plan which has not yet been exercised and the
number of shares of Common Stock which have been authorized for issuance under
the Plan but have not yet been placed under option (collectively, the
"Reserves"), as well as the price per share of Common Stock covered by each
option under the Plan which has not yet been exercised, shall be proportionately
adjusted for any increase or decrease in the number of issued shares of Common
Stock resulting from a stock split, reverse stock split, stock dividend,
combination or reclassification of the Common Stock, or any other increase or
decrease in the number of shares of Common Stock effected without receipt of
consideration by the Company; provided however, that conversion of any
convertible securities of the Company shall not be deemed to have been "effected
without receipt of consideration".  Such adjustment shall be made by the Board
or the Committee, whose determination in that respect shall be final, binding
and conclusive.  Except as expressly provided herein, no issue by the Company of
shares of stock of any class, or securities convertible into shares of stock of
any class, shall affect, and no adjustment by reason thereof shall be made with
respect to, the number or price of shares of Common Stock subject to an option.

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     In the event of the proposed dissolution or liquidation of the Company, the
offering period will terminate immediately prior to the consummation of such
proposed action, unless otherwise provided by the Board or the Committee.  In
the event of a proposed sale of all or substantially all of the assets of the
Company, or the merger of the Company with or into another corporation, each
option under the Plan shall be assumed or an equivalent option shall be
substituted by such successor corporation or a parent or subsidiary of such
successor corporation, unless such successor corporation does not agree to
assume the option or to substitute an equivalent option, in which case the Board
or the Committee shall, in lieu of such assumption or substitution, provide for
the participant to have the right to exercise the option as to all of the
optioned stock, including shares as to which the option would not otherwise be
exercisable.  If the Board or the Committee makes an option fully exercisable in
lieu of assumption or substitution in the event of a merger or sale of assets,
the Board or the Committee shall notify the participant that the option shall be
fully exercisable for a period of thirty (30) days from the date of such notice,
and the option will terminate upon the expiration of such period.

     The Board or the Committee may, if it so determines in the exercise of its
sole discretion, also make provision for adjusting the Reserves, as well as the
price per share of Common Stock covered by each outstanding option, in the event
that the Company effects one or more reorganizations, recapitalizations, rights
offerings or other increases or reductions of shares of its outstanding Common
Stock, and in the event of the Company being consolidated with or merged into
any other corporation.

     19.  AMENDMENT OR TERMINATION.  The Board or the Committee may at any time
terminate or amend the Plan.  Except as provided in paragraph 18, no such
termination can affect options previously granted, nor may an amendment make any
change in any option theretofore granted which adversely affects the rights of
any participant, nor may an amendment be made without prior approval of the
stockholders of the Company (obtained in the manner described in paragraph 21)
if such amendment would:

          (a)  Increase the number of shares that may be issued under the Plan;

          (b)  Permit payroll deductions at a rate in excess of ten percent
(10%) of the participant's Compensation;

          (c)  Change the designation of the employees (or class of employees)
eligible for participation in the Plan; or

          (d)  If the Company has a class of equity securities registered under
Section 12 of the Securities Exchange Act of 1934, as amended (the "Exchange
Act") at the time of such amendment, materially increase the benefits which may
accrue to participants under the Plan.

          If any amendment requiring stockholder approval under this paragraph
19 of the Plan is made subsequent to the first registration of any class of
equity securities by the Company under Section 12 of the Exchange Act, such
stockholder approval shall be solicited as described in paragraph 21 of the
Plan.

     20.  NOTICES.  All notices or other communications by a participant to the
Company under or in connection with the Plan shall be deemed to have been duly
given when received in the form specified by the Company at the location, or by
the person, designated by the Company for the receipt thereof.

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     21.  STOCKHOLDER APPROVAL.

          (a)  Continuance of the Plan shall be subject to approval by the
stockholders of the Company within twelve months before or after the date the
Plan is adopted.

          (b)  If and in the event that the Company registers any class of
equity securities pursuant to Section 12 of the Exchange Act, any required
approval of the stockholders of the Company obtained after such registration
shall be solicited substantially in accordance with Section 14(a) of the
Exchange Act and the rules and regulations promulgated thereunder.

          (c)  If any required approval by the stockholders of the Plan itself
or of any amendment thereto is solicited at any time otherwise than in the
manner described in Section 17(b) hereof, then the Company shall, at or prior to
the first annual meeting of stockholders held subsequent to the later of (1) the
first registration of any class of equity securities of the Company under
Section 12 of the Exchange Act or (2) the granting of an Option hereunder to an
Officer and Director after such registration, do the following:

               (i)  furnish in writing to the holders entitled to vote for the
Plan substantially the same information which would be required (if proxies to
be voted with respect to approval or disapproval of the Plan or amendment were
then being solicited) by the rules and regulations in effect under Section 14(a)
of the Exchange Act at the time such information is furnished; and

               (ii) file with, or mail for filing to, the Securities and
Exchange Commission four copies of the written information referred to in
subsection (i) hereof not later than the date on which such information is first
sent or given to stockholders.

     22.  CONDITIONS UPON ISSUANCE OF SHARES.  Shares shall not be issued with
respect to an option unless the exercise of such option and the issuance and
delivery of such shares pursuant thereto shall comply with all applicable
provisions of law, domestic or foreign, including, without limitation, the
Securities Act of 1933, as amended, the Securities Exchange Act of 1934, as
amended, the rules and regulations promulgated thereunder, and the requirements
of any stock exchange upon which the shares may then be listed, and shall be
further subject to the approval of counsel for the Company with respect to such
compliance.

          As a condition to the exercise of an option, the Company may require
the person exercising such option to represent and warrant at the time of any
such exercise that the shares are being purchased only for investment and
without any present intention to sell or distribute such shares if, in the
opinion of counsel for the Company, such a representation is required by any of
the aforementioned applicable provisions of law.

     23.  TERM OF PLAN.  The Plan shall become effective upon the earlier to
occur of its adoption by the Board of Directors or its approval by the
stockholders of the Company as described in paragraph 21.  It shall continue in
effect for a term of twenty (20) years unless sooner terminated under paragraph
19.

     24.  ADDITIONAL RESTRICTIONS OF RULE 16b-3.  The terms and conditions of
options granted hereunder to, and the purchase of shares by, persons subject to
Section 16 of the Securities Exchange Act of 1934 shall comply with the
applicable provisions of Rule 16b-3 of such Act.  This Plan shall be deemed to
contain, and such options shall contain, and the shares issued upon exercise
thereof shall be subject to, such additional conditions and restrictions as may
be required by Rule 16b-3 to qualify for the maximum exemption from Section 16
of the Securities Exchange Act of 1934 with respect to Plan transactions.


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