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                                                                    EXHIBIT 99.1



FOR IMMEDIATE RELEASE


Contacts:  Lisa Garber                        Mercedes Johnson
           Corporate Communications           Investor Relations
           Lam Research Corporation           Lam Research Corporation
           Phone:  510/572-4538               Phone:  510/572-4522
           Fax:    510/572-2935               Fax:    510/572-4442
           e-mail:  lisa.garber@lamrc.com     e-mail: mercedes.johnson@lamrc.com


LAM RESEARCH CORPORATION ANNOUNCES OPTION PURCHASE PROGRAM

FREMONT, Calif., June 21, 1999 -- Lam Research Corporation (Nasdaq: LRCX), a
leading supplier of wafer fabrication equipment to the worldwide semiconductor
industry, today announced a program authorized by the company's Board of
Directors to acquire from independent third parties options to purchase up to
3.5 million shares of the company's common stock. These call options are to be
acquired to offset the anticipated dilutive effect of a potential conversion
into common stock of subordinated debt previously issued by the company. As part
of the program, the Board also authorized the company to enter into put options
with the same third parties covering up to 5.25 million shares of the company's
common stock. The premiums the company will receive over the course of the
program from the sale of the put options to the third parties is intended to
offset in full the premium cost to the company of its purchases of call

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options from those same parties. This option purchase program is separate from
share repurchase programs previously announced by the company.

For further details concerning this program please see the company's filing
relating to this disclosure on Form 8-K, which is to be filed in conjunction
with this release.

                                    ~ more ~

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LAM ANNOUNCES OPTION PURCHASE PROGRAM................................PAGE 2 OF 3


This press release contains certain forward-looking statements which are subject
to the Safe Harbor provisions created by the Private Securities Litigation
Reform Act of 1995. Such forward-looking statements relate to possible or
anticipated further activity by the company concerning call and put option
transactions involving its common stock. Such statements are based on current
expectations and are subject to risks, uncertainties and changes in condition,
such as may arise from changes in market conditions effecting the company's
common stock, or the company's business strategies generally or specifically
relating to the potential conversion of its subordinated debt into common stock
of the company, and other risks detailed in documents filed with the Securities
and Exchange Commission, including specifically the report on Form 10-K for the
year ended June 30, 1998, and the Form 10-Q for the quarter ended March 31,
1999. The company undertakes no obligation to update the information in this
Press Release.

Lam Research Corporation is a leading supplier of wafer fabrication equipment
and services to the world's semiconductor industry. The company's common stock
trades on the Nasdaq National Securities Market under the symbol "LRCX". Lam's
World Wide Web address is http://www.lamrc.com.


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