MATTSON TECHOLOGY TO PRESENT AT UPCOMING CONFERENCES

FREMONT, Calif.- October 26, 2005 - Mattson Technology, Inc. (NASDAQ: MTSN), a leading supplier of advanced process equipment used to manufacture semiconductors, today announced that that it will be presenting at the following conferences:

• JPMorgan's Small Cap Conference, Four Seasons Hotel, Boston, MA
  Ludger Viefhues, chief financial officer, will be presenting on November 1 , 2005 at 10:00 a.m. Eastern Time.
• Deutsche Bank's Semiconductor Conference, Four Seasons Hotel, Las Vegas, NV
  Ludger Viefhues will be presenting on November 4, 2005 at 9:10 a.m. Pacific Time.
• Bear Stearns' SMid-Cap Investor Conference, Bear Stearns World Headquarters, New York, NY
  Ludger Viefhues will be presenting on November 8, 2005 at 8:00 a.m. Eastern Time.
• CIBC World Market's ‘Best Ideas' Small & Mid Cap Conference, Millennium Broadway Hotel,
  New York, NY
  David Dutton, chief executive officer, and Ludger Viefhues will be presenting on November 29, 2005 at 4:30 p.m. Eastern Time.

The presentations will be webcast live via the Internet, accessible on Mattson's corporate website at www.mattson.com. In addition to the live webcast, a replay will be available to the public on the Mattson website for one week following the live broadcast.

About Mattson Technology, Inc.

Mattson Technology, Inc. is the leading supplier of dry strip equipment and the second largest supplier of rapid thermal processing equipment in the global semiconductor industry. The company's strip and RTP equipment utilize innovative technology to deliver advanced processing performance and productivity gains to semiconductor manufacturers worldwide for the fabrication of current- and next-generation devices. 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.