MATTSON FILLS MULTIPLE-SYSTEM ORDER FOR AMD

Longtime Customer Adds Aspen Strip Systems to German Fab

FREMONT, Calif. — March 1, 1999 — Mattson Technology, Inc. today announced the receipt of a multimillion dollar follow-on order for multiple Aspen photoresist strip systems from Advanced Micro Devices (AMD), one of North America's largest merchant manufacturers of integrated circuits (ICs). AMD is using the equipment, which has already been delivered and installed, at its Fab 30 site in Dresden, Germany.

Mattson's Aspen Strip tools were selected based on their performance at AMD Fab 25 in the production of AMD's highly successful K6 product line in Austin, TX. The Aspen ICP Strip system was initially selected by AMD for its superior performance, cost of ownership and technology roadmap.

"Mattson's damage-free processing capabilities and low surface contamination results are the reason why Mattson has outperformed the competition and become one of the leading strip suppliers," said Brad Mattson, CEO of Mattson Technology. "In just a few short years, Mattson has become the ‘vendor of choice’ at more ‘Top 25’ companies than any other photoresist strip vendor."

The industry's move to smaller process geometries has led semiconductor companies to place greater emphasis on low damage results and residue-free photoresist stripping, which is used in as many as 30 steps during integrated circuit (IC) production. Mattson's Aspen Strip process uses inductively coupled plasma (ICP) source technology to achieve residue-free cleaning in one chamber, in situ, while competitors require sequential processing in two chambers. Residue-free cleaning eliminates the need for expensive organic solvents and reduces environmental concerns inherent to wet stripping effluents.

"We chose Mattson’s Aspen Strip tool based on the positive experience we have had with the tool at our Austin fab," said Joerg-Peter Weher, Module Manager Etch, Fab 30.

The transaction is the latest of several between Mattson and AMD over the years. AMD became Mattson’s first ever customer in 1991. Last summer, AMD was the recipient of Mattson’s 500th system.

ABOUT AMD

AMD is a global supplier of integrated circuits for the personal and networked computer and communications markets. AMD produces processors, flash memories, programmable logic devices, and products for communications and networking applications. Founded in 1969 and based in Sunnyvale, California, AMD had revenues of $2.5 billion in 1998. (NYSE:AMD).

About Mattson Technology

Mattson Technology Inc., is a leading supplier of thermal, plasma and wet semiconductor processing equipment. The company's products combine advanced process technology on a high productivity platform, backed by industry-leading support. Since beginning operations in 1989, the company's core vision has been to help bring technology leadership and productivity gains to semiconductor manufacturers worldwide. Headquartered in Fremont, Calif., the company maintains sales and support centers throughout the United States, Europe, Asia/Pacific and Japan. For more information, please contact Mattson Technology Inc., 2800 Bayview Drive, Fremont, Calif. 94538. Telephone: (800) MATTSON. Fax: (510) 657-0165. Internet:www.mattson.com