MATTSON TECHNOLOGY APPOINTS NEW PRESIDENT OF WET DIVISION
Industry Veteran to Drive Wet Division Strategic Growth

FREMONT, Calif. - July 12, 2001 - Mattson Technology (NASDAQ: MTSN), a leading supplier of advanced process equipment used to manufacture semiconductors, today announced David Ferran, 44, has been appointed to the post of president of Mattson Technology's Wet Division. Ferran will oversee the entire operations of the company's Wet Division, including Mattson Technology's sites in Germany and in the United States. Ferran will report directly to Mattson Technology CEO Brad Mattson.

Mattson commented that Ferran brings extensive leadership experience to his role with the company. "We are very excited to bring Dave on board. He is a veteran with an outstanding track record in growing companies in this industry," noted Mattson. "His experience will be invaluable to helping continue our Wet Division's strategic growth." Mattson also thanked Alan E. Walter, director of technology, and Heinz Pichler, site manager of Pliezhausen and Donaueschingen, for acting as interim co-presidents of the Wet Division.

The company anticipates continued growth in wet processing market share over the next several years. "I believe we are in an excellent position to further capitalize on this market, especially once the industry starts on its historical upturn," said Mattson.

Ferran joins Mattson Technology from Akrion LLC (Allentown, Pa.), where he was most recently Chairman and CEO. Prior to that, he was CEO of Submicron Systems (Allentown, Pa.). Before Submicron Systems, Ferran was Chairman and CEO of Tylan General (San Diego, Calif.), where he led the company through its IPO and subsequent sale to Millipore. Ferran spent 11 years as CEO for Vacuum General before leading the integration with Tylan General. Ferran holds a bachelor's of science degree from the University of New Hampshire and maintains board positions with Millace Pte Ltd and ISSYS Inc.

About Mattson Technology, Inc.

Mattson Technology, Inc. is a leading supplier of semiconductor wafer processing equipment used in "front-end" fabrication of integrated circuits. The company is a market leader in dry strip and RTP equipment, and its products combine advanced process technology on high-productivity platforms 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 and Asia. For more information, please contact Mattson Technology, Inc., 47131 Bayside Parkway, Fremont, Calif. 94538. Telephone: (800) MATTSON/(510) 657-5900. Fax: (510) 492-5911. Internet: www.mattson.com.