GDS-to-OASIS Translator Available as Free Download from Mentor Graphics Web site

WILSONVILLE, Ore., June 15, 2004 - Mentor Graphics Corporation (Nasdaq: MENT) today announced that it will make a GDS-to-OASIS translation utility available free of charge to promote the adoption of the new OASIS standard. The translator can be downloaded at: www.mentor.com/products/ic_nanometer_design/mask_syn/calibre_mdp/oasis.cfm

OASIS is the new stream format created in response to the need for more efficient handling of growing data volumes and is designed to replace the current GDS format. More than 40 people, representing more than 20 companies, worked together to develop the new format. Mentor Graphics' was involved from the inception, serving for many months as editor of the draft specification, then developing and contributing the translator utility.

This new encapsulated format offers substantial improvements in data volume efficiency, up to 50X reduction in hierarchical data volume from GDSII, and 2X and more reduction in flat data volume from MEBES mode5 mask writing format. As a result, data handling overhead is significantly reduced.

Several research papers have been published on the benefits of OASIS; most include benchmark studies of file size containment. Papers can also be downloaded for free from the Mentor Web site at http://www.mentor.com/techpubs/

About Mentor Graphics
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 $675 million and employs approximately 3,700 people worldwide. Corporate headquarters are located at 8005 S.W. Boeckman Road, Wilsonville, Oregon 97070-7777; Silicon Valley headquarters are located at 1001 Ridder Park Drive, San Jose, California 95131-2314. World Wide Web site: http://www.mentor.com/.

Mentor Graphics and Calibre are registered trademarks of Mentor Graphics Corporation. All other company or product names are the registered trademarks or trademarks of their respective owners.

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