MTSN Mattson Technology, Inc.

Mattson Technology, Inc. (NASDAQ: MTSN), a leading supplier of advanced process equipment used to manufacture semiconductors, today announced that Andy Moring, Sr. Vice President and Chief Financial Officer, will be participating in the following investor conferences.

• Caris & Company Tech Team 3Q Silicon Valley Investor Tour, to be held August 30-September 2, 2010 at the Marriott Santa Clara in Santa Clara, CA. The Company's presentation will be on Wednesday, September 1st at 4:15 pm PT. Although Caris & Co. is not webcasting company presentations, a copy of the slide presentation will be available on Mattson's corporate website. Investors and interested parties may access the file titled "MTSN IR Presentation_Q3 2010" at http://ir.mattson.com/events.cfm. Please contact your Caris & Company representative for further details on the Bus Tour.
• 2010 Rodman & Renshaw Annual Global Investment Conference (Technology Track), to be held September 12-15, 2010 at the New York Palace Hotel in New York City. The Company's presentation will be on Monday, September 13th at 11:15 am ET. A live webcast of the presentation will be accessible from the "Investors" section of the company's website (http://www.mattson.com) or via http://www.wsw.com/webcast/rrshq18/mtsn. The webcast will be archived for a period of 90 days. Mr. Moring will be available during the day on September 13th for one-on-one meetings. Please contact your Rodman & Renshaw representative to schedule a meeting.

"Safe-Harbor" Statement: Certain statements made during the conference may concern matters that are not historical facts and are forward-looking statements made pursuant to Safe-Harbor provisions of the Private Securities Litigation Reform Act of 1995, and include, but are not limited to: anticipated bookings, revenue and margins for future periods, growth plans and anticipated results. Forward-looking statements address matters that are subject to a number of risks and uncertainties that can cause actual results to differ materially, including, but not limited to: semiconductor end-user demand; customer demand for semiconductor manufacturing equipment; the timing of significant customer orders for Mattson's products; customer acceptance of delivered products and Mattson's ability to (1) collect amounts due upon shipment and upon acceptance; (2) timely manufacture, deliver and support ordered products; (3) bring new products to market and to gain market share with such products; customer rate of adoption of new technologies; risks inherent in the development of complex technology; the timing and competitiveness of new product releases by the Company's competitors; the Company's ability to align its cost structure with market conditions; and other risks and uncertainties described in the Company's Forms 10 K, 10-Q and other filings with the Securities and Exchange Commission.

About Mattson Technology, Inc. Mattson Technology, Inc. designs, manufactures and markets semiconductor wafer processing equipment used in the fabrication of integrated circuits. We are a leading supplier of plasma and rapid thermal processing equipment to the global semiconductor industry, and operate in three primary product sectors: Dry Strip, Rapid Thermal Processing and Etch. Through manufacturing and design innovation, we have produced technologically advanced systems that provide productive and cost-effective solutions for customers fabricating current- and next-generation semiconductor devices. For more information, please contact Mattson Technology, Inc., 47131 Bayside Parkway, Fremont, CA, 94538. Telephone: (800) MATTSON/(510) 657-5900. Internet: http://www.mattson.com.

Investor & Media Contact Laura Guerrant-Oiye Guerrant Associates tel 808-882-1467 lguerrant@guerrantir.com