Lam Announces Obtaining an Injunctive Order Against Kirim Semitec Enjoining the Manufacture, Sale, and Distribution of Electrodes Using Lam's Proprietary Design
November 18, 2002

FREMONT, Calif., November 18, 2002—Lam Research Corporation (Nasdaq: LRCX) today announced that it has obtained and enforced a preliminary injunction restraining Kirim Semitec Co., Ltd. from selling Lam proprietary electrodes. The injunction was issued by the District Court in Seoul, Korea. Lam had sought the injunction based on its belief that Kirim was selling products that violated Lam’s patents on those electrodes (U.S. Patent No. 6,073,577: Korean Patent No. 329974). In addition to those listed above, Lam holds a number of patents in multiple jurisdictions, including the United States, Korea, Japan, and Europe, which cover a variety of electrode assemblies and other high-quality, proprietary replacement parts.

“We are pleased that the Korean court upheld Lam’s patent rights on these electrodes,” said Jim Goodrich, Lam’s Senior Director of Materials in the Customer Support Business Group. “This enables the protection of Lam’s significant investments in new technologies and materials and supports our customers in achieving high productivity in the manufacturing of semiconductors.” Goodrich concluded stating, “We will continue to monitor our markets for potential patent infringement and take action to protect our investments, as necessary.”

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 technology and material investments, customer productivity and cost-efficiency and future efforts at patent enforcement, among others. 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 reports on Form 10-K for the year ended June 30, 2002 and the Form 10-Q for the quarter ended September 29, 2002, 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