1

                                                                    EXHIBIT 99.1


FOR IMMEDIATE RELEASE

Contacts:   Lisa Garber                         Kathleen Bela
            Corporate Communications            Investor Relations
            Lam Research Corporation            Lam Research Corporation
            Phone:  510/572-4538                Phone:  510/572-4566
            Fax:     510/572-2935               Fax:     510/572-6454
            e-mail:  lisa.garber@lamrc.com      e-mail:  kathleen.bela@lamrc.com


LAM RESEARCH CORPORATION ANNOUNCES SYSTEMATIC SHARE REPURCHASE PROGRAM

FREMONT, Calif., September 14, 1998 - Lam Research Corporation (Nasdaq: LRCX),
today announced that its Board of Directors has authorized the repurchase, at
management's discretion, of up to 368,000 shares of the Company's common stock
from the public market or in private purchases. The purchases will take place
from September 15 through and including September 25, 1998, in conjunction with
the Company's quarter end. As of September 1, 1998, the Company had
approximately 38 million shares of common stock outstanding. The shares
repurchased under this authorization will be used to off-set dilution caused by
issuance in the near-term of shares reserved under the Company's employee stock
purchase plans.

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


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