MTSN Mattson Technology, Inc.

Mattson Technology, Inc. (NASDAQ: MTSN), a leading supplier of advanced process equipment used to manufacture semiconductors, today announced that David L. Dutton, the company's president and chief executive officer, and J Michael Dodson, chief financial officer, are scheduled to present to the investment community at the 14th Annual Needham Growth Conference.

The 14th Annual Needham Growth Conference will take place at the New York Palace Hotel in New York January 10-12, 2012. Mattson Technology is scheduled to present on Tuesday, January 10 at 10:00 a.m. EST.

The investor presentation slides, as well as a live and subsequently archived webcast of the presentation, will be made available on the investor page of Mattson Technology's website, http://www.mattson.com.

Management Available for Additional Meetings with Investment Community on Wednesday, January 11 In addition, the management of Mattson Technology will be available for meetings in New York City on Wednesday, January 11. Investors interested in meeting with management on January 11, please contact Mattson Technology's Investor Relations, Laura Guerrant-Oiye at (808) 882-1467 or via email at lguerrant@guerrantir.com.

"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