Lam Research Corporation Concludes Agreement with SMIC for the Purchase of Equipment Exceeding $100M
April 17, 2002

Lam Research Corporation Concludes Agreement with SMIC for the Purchase of Equipment Exceeding $100M FREMONT, Calif., April 17, 2002 — Lam Research Corporation (Nasdaq: LRCX) today announced an agreement with Semiconductor Manufacturing International Corporation (SMIC), a foundry in Shanghai, China, for orders exceeding $100 million. These orders include dielectric, silicon, and metal etch equipment as well as CMP equipment. Lam recognized a portion of these orders in 2001. The balance of these orders are being recognized in calendar 2002. Lam was also selected as SMIC's top supplier, winning the Best Supplier Award for commitment to success, responsiveness, and overall process and hardware capability.

According to Richard Chang, SMIC's CEO and president, "We are very pleased with Lam's quick attention and effective solutions to our needs as a new foundry. The company's production-proven technologies have been straightforward to qualify and are extendible to the advanced processes we will soon begin developing."

"We are honored to be recognized as SMIC's top equipment supplier and confident our relationship will continue to strengthen for the mutual benefit of both companies," stated James W. Bagley, Lam's chairman and CEO. "We look forward to supporting SMIC's aggressive ramp to production and subsequent development of advanced applications."

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 anticipated extension of process performance, the timing in which orders will be recognized, the future of Lam's relationship with SMIC and SMIC's continued production ramp and development activities. Such statements are based on current expectations and are subject to risks, uncertainties and changes in condition, significance, value and effect as well as 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 24, 2001 and the Form 10-Q for the quarter ended December 30, 2001, which could cause actual results to vary from expectations. The company undertakes no obligation to update the information or statements made in this press release.

Lam Research Corporation is a leading supplier of wafer fabrication equipment and services to the world's semiconductor industry. Lam's common stock trades on the Nasdaq National Market under the symbol LRCX. The Company's World Wide Web address is