Motorola licenses numerical technologies'patented phase-shifting technology for semiconductor production

San Jose, CA -- May 30, 2000 -- Numerical Technologies, Inc. (NASDAQ: NMTC) today announced a multi-year, multi-million dollar technology licensing agreement with Motorola (NYSE: MOT) Semiconductor Products Sector. Under the terms of the agreement, Motorola will license Numerical's iN-Phase software and patented phase-shifting technology for the commercial production of high-end, high-performance ICs.

 This agreement is an extension of ongoing work between Motorola and Numerical. In February 1999, Motorola announced that it had used Numerical's patented phase-shifting technology to produce 0.1-micron feature sizes, achieving a significant performance increase.

 "Numerical's phase-shifting technology is now a key component in our high-performance process roadmap," said James Vasek, photolithography technology manager, MOS-13 Die Production division.

 Y.C. (Buno) Pati, president and CEO of Numerical, said, "Working together, Motorola and Numerical have proven the value of the technology covered under our patent. We're pleased that our approach to phase-shifting has had a positive effect on Motorola's ability to accelerate their roadmap."

 In March 1999, Numerical received US Patent #5,858,580 for its approach to phase shifting. The Company's iN-Phase software product is a comprehensive package that combines phase shifting with optical proximity correction (OPC) and silicon verification technologies.

 About Numerical
Numerical Technologies Inc. develops and markets proprietary technology, software tools and services that enable the semiconductor industry to produce subwavelength integrated circuits, i.e. integrated circuits with components smaller than the wavelength of light used to create circuit patterns on silicon. Numerical's products and industry alliances form a comprehensive design-to-silicon solution that enables the creation of smaller, faster, and more power-efficient semiconductors using available manufacturing equipment. Numerical customers include the world's leading semiconductor companies, design automation tool vendors, semiconductor equipment suppliers and photomask manufacturers. Additional information about the company is available on the Web at http://www.numeritech.com.

Contacts:

 Numerical Technologies
Susan Lippincott, 408-273-4474, slippincott@numeritech.com

 Cayenne Communication
Lois DuBois, 650-854-5485, lois.dubois@cayennecom.com