Silicon Image to Port HDMI^TM Receiver IP Core to UMC's 90nm
Process Technology

IP targets SoC designs for high-definition media applications

HSINCHU, Taiwan, and SUNNYVALE, Calif., April 11, 2006 - Silicon Image, Inc. (Nasdaq: SIMG), a leader in the secure distribution, presentation and storage of high-definition content, and UMC (NYSE: UMC, TSE: 2303), a leading global semiconductor foundry, today announced an agreement to port to UMC's 90nm process technology a High-Definition Multimedia Interface^TM(HDMI^TM) receiver intellectual property (IP) core from Silicon Image. The agreement will enable UMC's and Silicon Image's mutual customers to license from Silicon Image an HDMI 1.1 receiver core that is silicon-proven on UMC's most advanced mainstream production technology.

"Digital TV System on a Chip (SoC) designs are integrating HDMI and moving to 90nm processes," said Eric Almgren, VP of Intellectual Property at Silicon Image. "By offering our first 90nm HDMI receiver IP core on UMC's process, we will enable HDTV SoC companies to integrate a proven HDMI core in a leading-edge process."

HDMI^TM has quickly emerged as the standard interface for connecting high-definition (HD) components such as HDTVs, DVD players, set-top boxes, digital cameras and A/V receivers. HDMI enables the transmission of premium digital content over an uncompressed, secure digital video and audio interface via a single cable with a small, low-cost connector.

Silicon Image offers the broadest portfolio of HDMI solutions on the market, addressing a wide variety of integration options. This portfolio includes discrete HDMI transmitters and receivers, video processors with HDMI, HDMI transmitter and receiver IP cores integrating both the digital logic and analog PHY IP, and HDMI transmitter and receiver digital IP cores with a companion discrete PHY chip.

Ken Liou, director of the IP and Design Support Division at UMC, said, "Reusable IP has become increasingly important as SoC designs migrate to more complex nanometer technologies. To satisfy our customers' increasing requirements for this IP, UMC continues to enhance its portfolio of third-party IP offered as part of our SoC foundry solutions. We are pleased to partner with Silicon Image to verify their leading HDMI cores on our 90nm technology, and look forward to offering our customers the benefits of this IP in the near future."

UMC's 90nm process technology is in volume production for a wide range of products that span the computer, consumer, and communications sectors. These include RF/baseband products, high-speed graphics applications, and low power SoCs for portable electronics. UMC's 90nm technology is supported with extensive design support resources including silicon verified libraries, EDA reference design flows, and the latest design-for-manufacturing (DFM) solutions.

About UMC
UMC (NYSE: UMC, TSE: 2303) is a leading global semiconductor foundry that manufactures advanced process ICs for applications spanning every major sector of the semiconductor industry. UMC delivers cutting-edge foundry technologies that enable sophisticated System-on-Chip (SoC) designs, including volume production 90nm, industry-leading 65nm, and mixed signal/RFCMOS. UMC's 10 wafer manufacturing facilities include two advanced 300mm fabs; Fab 12A in Taiwan and Singapore-based Fab 12i are both in volume production for a variety of customer products. The company employs approximately 12,000 people worldwide and has offices in Taiwan, Japan, Singapore, Europe, and the United States. UMC can be found on the web at http://www.umc.com.

About Silicon Image, Inc.
Headquartered in Sunnyvale, Calif., Silicon Image, Inc. is a leader in the secure distribution, presentation and storage of high-definition content. Silicon Image creates and drives industry standards for digital content delivery such as DVI, HDMI and UDI, leveraging strategic partnerships with global leaders in consumer electronics and personal computing. Silicon Image offers robust, high-bandwidth semiconductors in the global PC/display, consumer electronics and storage arenas based on its innovative digital interconnect technology and has become one of the top ten IP licensing vendors in the world. For more information on Silicon Image, visit www.siliconimage.com.

Forward-looking Statements
This news release contains forward-looking information within the meaning of federal securities regulations. These forward-looking statements include statements related to the benefits, lower cost and performance of the products and intellectual property of Silicon Image, the porting of Silicon Image's HDMI receiver core to UMC's 90nm process, the position of Silicon Image in the HDMI market and the benefits and acceptance of HDMI. These forward-looking statements involve risks and uncertainties, including those described from time to time in Silicon Image's filings with the Securities and Exchange Commission (SEC) that could cause the actual results to differ materially from those anticipated by these forward-looking statements. In particular, the benefits, lower cost and performance of the products and intellectual property of Silicon Image, the porting of Silicon Image's HDMI receiver core to UMC's 90nm process, the position of Silicon Image in the HDMI market and the benefits and acceptance of HDMI, may differ materially from what is currently anticipated. In addition, see "Management's Discussion and Analysis of Financial Condition and Results of Operations - Factors Affecting Future Results" in the most recent Annual Report, Form 10-K or 10-Q filed by Silicon Image with the SEC. Silicon Image assumes no obligation to update this forward-looking information.

HDMI, the HDMI logo and High-Definition Multimedia Interface are trademarks or registered trademarks of, and are used under license from, HDMI Licensing LLC.

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