Judge Again Dismisses Rambus Patent Claims in Virginia Case

Rambus plans to appeal today's decision

LOS ALTOS, CA - March 1, 2005 - Rambus Inc. (Nasdaq:RMBS) announced that today the Virginia judge in the patent infringement case against Infineon has again dismissed Rambus's patent infringement claims. Rambus's five-year-old patent infringement case with Infineon relates to SDRAM and DDR DRAM memory products.

"We look forward to eventually presenting our patent claims on the merits so our contributions to the industry and the value of our inventions are clear," said John Danforth, senior vice president and general counsel at Rambus. "In the meantime, we feel we have a strong case on appeal."

Today's ruling is in one of four currently pending U.S. patent cases involving Rambus. The Honorable Robert E. Payne stated on the record that it was his intention that his ruling be limited to the parties before him. The court previously ruled against Rambus on other grounds, and those rulings were reversed in 2003 by the Court of Appeals for the Federal Circuit. Today's rulings came after the Court of Appeals remanded the case back to the Eastern District of Virginia for trial of Rambus patent claims. In other pending litigation, Rambus is asserting a larger set of patents against a larger set of products manufactured by Hynix Semiconductor, Infineon Technologies, Inotera Memories, and Nanya Technology Corporation. Rambus also has a case pending against Micron Technologies.

The court further ruled today that it would dismiss Infineon's monopoly claim against Rambus as moot. The court also indicated that it will issue a written ruling and decide how to proceed with the remaining claim in the Virginia action, which may be tried next week, and is a claim by Infineon against Rambus for purported violation of California Business and Profession Code Section 17200. Once the written order for today's ruling is made public, it will be available on Rambus's website at www.rambus.com/inv (under Litigation Update section).

About Rambus Inc.
Rambus is one of the world's premier technology licensing companies specializing in the invention and design of high-speed chip interfaces. Since its founding in 1990, the company's innovations, breakthrough technologies and integration expertise have helped industry-leading chip and system companies solve their most challenging and complex I/O problems and bring their products to market. Rambus's interface solutions can be found in numerous computing, consumer, and communications products and applications. Rambus is headquartered in Los Altos, Calif., with regional offices in Chapel Hill, North Carolina, Taipei, Taiwan and Tokyo, Japan. Additional information is available at www.rambus.com.

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