Mattson Technology, Inc. Announces Proposed Public Offering

Mattson Technology, Inc. MTSN today announced that it intends to offer and sell shares of its common stock in an underwritten public offering. The offering is subject to market and other conditions and there can be no assurance as to whether or when the offering may be completed, or as to the actual size or terms of the offering. The offering is expected to price on or about Wednesday, May 11, 2011. Needham & Company, LLC is acting as sole book running manager and Rodman & Renshaw, LLC and Roth Capital Partners are acting as co-managers for the offering.