TDK Semiconductor Prevails Over Silicon Laboratories In Summary Judgment Hearing

11/7/2002 - TDK Semiconductor, a leader in the design and manufacture of communication semiconductors for worldwide markets, successfully defended against a Motion for Summary Judgment brought by Silicon Laboratories ("Silicon Labs") before the U.S. District court, Central District of California. The Court refused to grant Silicon Labs' request for a ruling that it did not infringe TDK Semiconductor's patent rights. TDK Semiconductor is suing Silicon Labs for infringement of its patent entitled "Signal Modulation Across Capacitors," U.S. Patent No. 5,654,984.

TDK Semiconductor's patent relates to novel methods and circuitry for communicating a signal across an isolation barrier using capacitors, which are used in products such as modems. The allegedly infringing products include semiconductor chipsets made by Silicon Labs of Austin, Texas that TDK Semiconductor asserts implement TDK Semiconductor's patented technology in accordance with the claims of the patent.

TDK Semiconductor charges that the Silicon Labs' devices infringe on TDK Semiconductor's patent rights. Among the allegedly infringing devices are the Silicon Labs Si3035 and Si3044 chipsets. Gerald Fitch, Chief Financial Officer for TDK Semiconductor, stated "We are pleased that the Court denied Silicon Labs' motion and that TDK Semiconductor's case will continue. We remain confident that TDK Semiconductor will ultimately prevail in the litigation."

TDK Semiconductor is represented in the litigation by its longstanding intellectual property counsel, The Hecker Law Group of Los Angeles, California.

About TDK Semiconductor
TDK Semiconductor, part of the $4.8 billion TDK Corporation (NYSE: TDK), provides advanced ICs for communications markets worldwide. The company produces analog and mixed-signal products for applications such as digital cable and satellite set-top boxes; local, metro and wide area networking; point of sale terminals, credit card verification systems and smart card readers.

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