SAN JOSE, Calif. -May 23, 2011 - Tessera Technologies, Inc. (NASDAQ: TSRA) today announced that its wholly owned subsidiary Tessera, Inc. has filed a complaint against Sony Corporation in the California State Court of Santa Clara County alleging breach of contract, breach of the covenant of good faith and fair dealing, and seeking declaratory relief.

"Under our Agreement with Sony, we have the right to examine and audit Sony's records regarding amounts due, as we typically have with all our licensees," said Robert A. Young, president and chief executive officer, Tessera Technologies, Inc. "We are bringing this suit because Sony has not paid all of the royalties owed to us under the contract."

To avoid confusion, please note that the breach of contract suit announced today is distinct from the patent infringement suit Tessera, Inc. brought against Sony Corporation, Sony Electronics, Inc., and Renesas Electronics Corporation (the merged entity of NEC Electronics and Renesas Technology Corp.) in the United States District Court for Delaware on Oct. 1, 2010.

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, particularly with respect to Tessera's licensing and litigation strategies. Material factors that may cause results to differ from the statements made include delays, setbacks or losses relating to our intellectual property or intellectual property litigations, or any invalidation or limitation of our key patents; fluctuations in our operating results due to the timing of new license agreements and royalties, or due to legal costs; changes in patent laws, regulation or enforcement, or other factors that might affect our ability to protect our intellectual property; the risk of a decline in demand for semiconductor products; failure by the industry to adopt our technologies; competing technologies; the future expiration of our patents; the future expiration of our license agreements and the cessation of related royalty income; the failure or refusal of licensees to pay royalties; failure to achieve the growth prospects and synergies expected from acquisition transactions; and delays and challenges associated with integrating acquired companies with our existing businesses. 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 Dec. 31, 2010, and its Quarterly Report on Form 10-Q for the quarter ended March 31, 2011, include more information about factors that could affect the company's financial results. Tessera assumes no obligation to update information contained in this press release. Although this release may remain available on Tessera's website or elsewhere, its continued availability does not indicate that Tessera is reaffirming or confirming any of the information contained herein.

Tessera Technologies, Inc., headquartered in San Jose, California, develops, invests in, licenses and delivers innovative miniaturization technologies and products for next-generation electronic devices. More than 65% of Tessera's employees are dedicated technologists or inventors. The company's micro-electronics solutions enable smaller, higher-functionality devices through chip-scale and wafer-level packaging technology, silicon-level interconnect and 3-D packaging, as well as silent air cooling technology. Tessera's imaging and optics solutions provide cost-effective, high-quality camera functionality in electronic products through technologies that include Extended Depth of Field (EDOF), zoom and MEMS-based auto-focus. The company also offers custom micro-optics for semiconductor lithography, communications, medical, industrial and other applications. For information call 1.408.321.6000 or go to www.tessera.com.

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