WILSONVILLE, Ore., May 23, 2007 - Mentor Graphics Corporation (Nasdaq: MENT) and UMC (NYSE: UMC) today announced the availability of a new reference flow for analog mixed-signal (AMS) system-on-chip (SoC) designs. The flow includes an integrated environment for design capture, data management, and verification.

UMC and Mentor Graphics jointly developed this mixed-signal design flow to address the increasingly sophisticated requirements of today's AMS designers. The reference design flow demonstrates a methodology that allows system-level partitioning, high level trade-off, and system validation throughout the design flow. Mentor's ADVance MS™ with ADiT™ and Design Architect®-IC products are included in the flow. Mentor and UMC verified this design flow with successful system simulation of an ultra-wide-band (UWB) transceiver design.

"Through our collaboration with Mentor Graphics, the full chip mixed-signal transceiver reference design was successfully developed using the flow on our 130 nm mixed-signal process," said Ken Liou, director of the IP and Design Support Division at UMC. "The results prove that this reference flow is ready to help designers successfully produce other types of complex analog-mixed signal products in silicon."

"It is a challenge to handle an RF SoC design with increasing design content in multiple application domains," said Jue-Hsien Chern, senior vice president and general manager, Deep Submicron division at Mentor Graphics. "We worked very closely with UMC on the reference flow that can manage the complexity of RF system design and verification. Using the behavioral models with DA-IC and ADVance MS, this much improved efficiency on AMS SoC design will benefit our mutual customers."

UMC and Mentor Graphics will be showcasing the reference flow at the Design Automation Conference (DAC), taking place June 4-7 at the San Diego Convention Center in San Diego, CA. Mentor Graphics and UMC will be participating in a presentation series at each others' booths numbered 4074 and 3676, respectively, where they will share with customers details of the reference flow.

UMC (NYSE: UMC, TSE: 2303) is a leading global semiconductor foundry that manufactures advanced system-on-chip (SoC) designs for applications spanning every major sector of the IC industry. UMC's SoC Solution Foundry strategy is based on the strength of the company's advanced technologies, which include production proven 90nm, 65nm, mixed signal/RFCMOS, and a wide range of specialty technologies. Production is supported through 10 wafer manufacturing facilities that 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.

Mentor Graphics Corporation (Nasdaq: MENT) is a world leader in electronic hardware and software design solutions, providing products, consulting services and award-winning support for the world's most successful electronics and semiconductor companies. Established in 1981, the company reported revenues over the last 12 months of about $800 million and employs approximately 4,250 people worldwide. Corporate headquarters are located at 8005 S.W. Boeckman Road, Wilsonville, Oregon 97070-7777. World Wide Web site: http://www.mentor.com/.

Note From UMC Concerning Forward-Looking Statements
Some of the statements in the foregoing announcement are forward looking within the meaning of the U.S. Federal Securities laws, including statements about future outsourcing, wafer capacity, technologies, business relationships and market conditions. Investors are cautioned that actual events and results could differ materially from these statements as a result of a variety of factors, including conditions in the overall semiconductor market and economy; acceptance and demand for products from UMC; and technological and development risks.

Mentor Graphics, ADVance MS and Design Architect-IC are registered trademarks and ADiT is a trademark of Mentor Graphics Corporation. All other company or product names are the registered trademarks or trademarks of their respective owners.