Ownership Submission
FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
  Hariri Abdi
 2. Date of Event Requiring Statement (Month/Day/Year)
08/17/2004		 3. Issuer Name and Ticker or Trading Symbol
LAM RESEARCH CORP [LRCX]
(Last)
(First)
(Middle)
4300 CUSHING PKWY		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Vice President
 5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

FREMONT, CA 94538		 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common Stock (6) 5,497
D
 

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Stock Option (Right to Buy)   (1) 01/04/2009 Common Stock 9,300 $ 6.3333 D  
Stock Option (Right to Buy)   (2) 10/17/2009 Common Stock 2,500 $ 9.67 D  
Stock Option (Right to Buy)   (3) 05/23/2010 Common Stock 5,600 $ 26.4375 D  
Stock Option (Right to Buy)   (4) 10/01/2011 Common Stock 1,000 $ 16.14 D  
Stock Option (Right to Buy)   (4) 10/01/2011 Common Stock 822 $ 16.14 D  
Stock Option (Right to Buy)   (5) 02/27/2009 Common Stock 24,400 $ 22.05 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Hariri Abdi
4300 CUSHING PKWY
FREMONT, CA 94538		       Vice President  

Signatures

Kym Hall by Power of Attorney 11/12/2004
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) Stock option was 100% vested as of 3/1/03.
(2) Stock option vests 1/8 per quarter over two years.
(3) Stock option was 100% vested as of 5/23/04.
(4) Stock option becomes 100% vested on 10/01/06.
(5) Stock option vests as to 2,500 shares on 2/27/03, 4,400 shares on 2/27/04, 10,000 shares on 2/27/05, 10,000 shares on 2/27/06.
(6) Shares acquired through participation in the Lam Research Employee Stock Purchase Plan.

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