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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