For more information, contact:

Mike El-Hillow Advanced Energy Industries, Inc. 970.-07.6570

Cathy Kawakami Advanced Energy Industries, Inc. 970.407.6732 cathy.kawakami@aei.com

Advanced Energy Appoints Robert L. Bratter to the Board of Directors

Fort Collins, Colorado (February 12, 2004)—Advanced Energy (Nasdaq: AEIS) today announced the appointment of Robert L. Bratter, 59, to the board of directors. Mr. Bratter brings more than 32 years of technology management experience including 25 years in the semiconductor and microelectronics division of IBM. Most recently, he served as chief executive officer of Cronos Integrated Microsystems, where he led the company¡¦s 1999 spin off from MCNC, a North Carolina technology incubator, as well as its sale of its optical MEMS division to JDS Uniphase.

 

Doug Schatz, chairman and chief executive officer said, ¡§Robert is an expert technologist and an accomplished leader of successful high-technology companies. He brings a deep understanding of the semiconductor and components markets, from his experience at both end users and equipment manufacturers. We welcome him to the Board, and look forward to the contributions he can make to the long-term strategic direction of the Company.¡¨

In addition to IBM and Cronos Integrated Microsystems, Mr. Bratter has led large, fast-growing divisions of major corporations such as the Silicon Valley Group and Watkins-Johnson Company. He provided hands-on management in fast-growing start-up companies such as Palo Alto Technologies and Nanovation Technologies. He currently serves on the board of directors of Primarion, Inc., Magfusion, Inc., and Canyon Broadband, Inc., all privately held companies.

About Advanced Energy
Advanced Energy is a global leader in the development and support of technologies critical to high-technology manufacturing processes used in the production of semiconductors, flat panel displays, data storage products, compact discs, digital video discs, architectural glass, and other advanced product applications.

Leveraging a diverse product portfolio and technology leadership, Advanced Energy creates solutions that maximize process impact, improve productivity and lower cost of ownership for its customers. This portfolio includes a comprehensive line of technology solutions in power, flow, thermal management, and plasma and ion beam sources for original equipment manufacturers (OEMs) and end-users around the world.

Advanced Energy operates in regional centers in North America, Asia and Europe and offers global sales and support through direct offices, representatives and distributors. Founded in 1981, Advanced Energy is a publicly held company traded on the Nasdaq National Market under the symbol AEIS. For more information, please visit our corporate website: www.advanced-energy.com.