MATTSON TECHNOLOGY, INC.
ANNOUNCES RECORD SECOND QUARTER FINANCIAL RESULTS

FREMONT, Calif., July 19, 2000 -- Mattson Technology, Inc. (Nasdaq:MTSN), a leading supplier of advanced process technology for semiconductor manufacturing, today announced record financial results for the second quarter of 2000.

Net sales for the second quarter of 2000 were $50.1 million, compared to $24.1 million for the second quarter of 1999, an increase of 108 percent. The company's net income for the second quarter was $6.5 million or 30 cents per diluted share, compared to a net loss of $0.2 million or 1 cent per diluted share for the second quarter of 1999. Bookings for the second quarter of 2000 were $65.7 million as compared to $29.6 million for the second quarter of 1999. Backlog increased 22 percent to $86.5 million, compared to $35.0 million in the second quarter of 1999.

Quarter-to-quarter net sales increased 18 percent, up from $42.6 million for the first quarter of 2000. Net income for the second quarter of $6.5 million, or 30 cents per diluted share, represents a 61% increase from last quarter's net income of $4.0 million, or 21 cents per diluted share. Bookings increased 14 percent, up from $57.4 million in the first quarter of 2000, resulting in a book-to-bill ratio of 1.31 to 1.0.

Brad Mattson, CEO of Mattson Technology, stated, "This is another great quarter for the Company. We continue to execute well with revenues, bookings, and earnings all at record levels. We continue to prove our ability to increase business in the markets we serve, with seven consecutive quarter of revenue growth. Once the Steag-CFM acquisitions are completed, we will become one of the Top 15 semiconductor equipment suppliers in the world."

This Press Release contains forward looking statements regarding, among other matters, the Company's future financial performance and the completion of the Steag and CFM acquisitions. Forward looking statements address matters which are subject to a number of risks and uncertainties. In addition to the general risks associated with the development of complex technology, future results of the Company will depend on a variety of factors, including the timing of significant orders, the ability of the Company to bring new systems to market, the timing of new product releases by the Company's competitors, slowdowns in the semiconductor industry, other competitive factors, satisfaction of conditions to pending acquisition and risks of integration. Reference is made to the Company's filings with the Securities and Exchange Commission for further discussion of risks and uncertainties regarding the Company's business.

About Mattson Technology

Mattson Technology Inc., is a leading supplier of thermal, plasma and wet semiconductor processing equipment. The company's products combine advanced process technology on a high productivity platform, 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, Asia/Pacific and Japan. For more information, please contact Mattson Technology Inc., 2800 Bayview Drive, Fremont, Calif. 94538. Telephone: (800) MATTSON. Fax: (510) 657-0165. Internet:www.mattson.com