SAN JOSE, Calif.--(BUSINESS WIRE)--April 14, 2005--Tessera Technologies, Inc. (Nasdaq:TSRA), a leading provider of miniaturization technologies for the electronics industry, today announced it has amended its previously filed patent infringement suit against Infineon Technologies AG (NYSE:IFX) and Micron Technology, Inc. (NYSE:MU) to include violations of antitrust law and illegal business interference. In this amendment, Tessera seeks damages and an injunction under Federal and Texas law based on Micron and Infineon's anticompetitive actions in the synchronous DRAM market, in addition to Tessera's existing charges that certain of the defendants' packaged semiconductor components use Tessera patented inventions.

"As set forth in the amended complaint, Tessera believes it was substantially harmed by a conspiracy to boycott Tessera's packaging technology," said Chris Pickett, Tessera's senior vice president and general counsel. "Tessera's patented packaging technology was a necessary component of RDRAM products, and the amended complaint refers to several documents now in the public record which we believe show that the defendants colluded to prevent RDRAM products from competing fairly in the marketplace. We further believe that the defendants' anticompetitive actions continue through their refusal to pay for their deliberate use of Tessera's patented technology."

"Tessera is confident in its position and believes this course of action is important for the company and its stakeholders," added Pickett. "Tessera management will provide a litigation update on our upcoming quarterly earnings conference call."

About Tessera Technologies, Inc.

Tessera Technologies, Inc., through its wholly-owned subsidiary Tessera, Inc., is a leading provider of miniaturization technologies for the electronics industry. Tessera enables new levels of miniaturization and performance by applying its unique expertise in the electrical, thermal and mechanical properties of materials and interconnect. As a result, Tessera's technologies are widely adopted in high-growth markets including consumer, computing, communications, medical and defense. Tessera's customers include the world's top semiconductor companies such as Intel, Samsung, Renesas, Toshiba and Texas Instruments. The company's stock is traded on the Nasdaq National Market under the symbol TSRA. Tessera is headquartered in San Jose, California. www.tessera.com.

Safe Harbor Statement

This press release contains forward-looking statements, which are made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. Forward-looking statements involve risks and uncertainties that could cause actual results to differ significantly from those projected. Factors that might cause or contribute to such differences include, but are not limited to, fluctuations in Tessera's operating results due to the timing of new license agreements and royalties, the pace of adoption of Tessera's chip scale and multi-chip packaging technologies by the consumer electronics industry, Tessera's ability to protect its intellectual property and increases in the costs of that effort and the risk of a decline in demand for semiconductor products. You are cautioned not to place undue reliance on the forward-looking statements, which speak only as of the date of this release. Tessera's filings with the Securities and Exchange Commission, including its Annual Report on Form 10-K for the year ended December 31, 2004 include more information about factors that could affect the company's financial results.

CONTACT: Tessera Technologies, Inc.
Doug Norby, 408-894-0700
(Senior Vice President, Chief Financial Officer)
Mike Forman, 408-894-0700
(Vice President, Finance and Administration)
or
Lippert/Heilshorn & Associates
Moriah Shilton, 415-433-3777 (Investor Relations)
Moriah@lhai-sf.com
Kirsten Chapman, 415-433-3777 (Investor Relations)

SOURCE: Tessera Technologies, Inc.