Toshiba and Rambus Sign Patent License Agreement

Agreement Covers SDRAM and DDR SDRAM Memory Controllers LOS ALTOS, Calif.--July 5, 2006--Rambus Inc., one of the world's premier technology licensing companies specializing in high-speed chip interfaces, announced today it has signed a new patent license agreement with Toshiba Corporation. This agreement grants Toshiba a license to Rambus patents for SDRAM and DDR SDRAM memory controllers.

"Toshiba was our first patent licensee and we are pleased to continue this long and valuable relationship with a trusted partner," said Sharon Holt, senior vice president of Sales, Licensing and Marketing at Rambus. "Our focus of licensing industry-leading companies with both our products and patents continues to help push the boundaries of what our collective engineering teams can accomplish. We look forward to many years of development with Toshiba."

Toshiba currently holds technology licenses for the use of Rambus' XDR(TM) memory solution and its DDR2 interface cells as well as its FlexIO(TM) processor bus interface. Additionally, Toshiba has licensed various Rambus serial link interface designs, including those for Advanced Backplane, Fibre Channel, and PCI Express applications.

Since its founding in 1990, Rambus has focused on advancing electronic system performance through innovations in logic and memory interfaces, controller architectures, and system design. Such innovations include the application of micro-threading to a DRAM core, the elimination of trace length matching with FlexPhase(TM) circuit technology, and industry-recognized dynamic point-to-point memory-enhancing technology. These and other innovations result in a broad portfolio of innovations and patents that enables semiconductor manufacturers and system designers to achieve ever-increasing levels of functionality and performance, to lower system costs, to mitigate risk with silicon-proven designs, and to reduce time to market. For more information on Rambus' patent portfolio, please visit www.rambus.com/products/innovationslicensing/.

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 patented innovations, breakthrough technologies and renowned integration expertise have helped industry-leading chip and system companies bring superior products to market. Rambus' technology and products solve customers' most complex chip and system-level interface challenges enabling unprecedented performance in computing, communications and consumer electronics applications. Rambus licenses both its world-class patent portfolio as well as its family of leadership and industry-standard interface products. Headquartered in Los Altos, California, Rambus has regional offices in North Carolina, India, Germany, Japan and Taiwan. Additional information is available at www.rambus.com