For more information, contact:

Richard Beck Advanced Energy Industries, Inc. 970.407.6204 dick.beck@aei.com

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

Fort Collins, Colorado (July 13, 2000) -Advanced Energy Industries (Nasdaq: AEIS) today announced the appointment of Trung T. Doan to the Board of Directors. Mr. Doan brings nearly 20 years of semiconductor industry experience and is currently the Vice President of Process Development at Micron Technology, Inc., a world leader in the manufacturing of DRAM memory components.

Doug Schatz, Advanced Energy's Chairman and CEO, said, "We are very pleased to welcome Trung to our board. He has an impressive and accomplished background in semiconductor technology development, and his expertise will provide an invaluable perspective on emerging trends in semiconductor manufacturing. We look forward to the benefit of his contributions," added Mr. Schatz.

Mr. Doan joined Micron Technology in 1988 as an Engineer and has since held a series of increasingly responsible positions before being named to his current position in 1997. He earned a Bachelor of Science with Honors in Nuclear Engineering from the University of California, Santa Barbara, at the age of 20. In 1981 after Mr. Doan received a Masters of Science in Chemical Engineering, he worked for Intel and received Intel's 1983 Outstanding Technology Development Award. Mr. Doan later worked for Honeywell and Philips.

Throughout his career, Mr. Doan has focused on technology development. He is a holder of more than 130 patents with many pending. He was named as one of the most prolific inventors 1988 to 1998 published by the U.S. patent office. He has authored numerous technical papers and has chaired and given keynote addresses at many industry association conferences. Mr. Doan also serves on the board of Nutool and Engineering Measurements Company (EMCO).

About Advanced Energy
Advanced Energy is a global leader in the development, marketing, and support of technology solutions that are critical in the manufacture of semiconductors, data storage products, and flat panel displays. Original equipment manufacturers (OEMs) and end-users around the world depend on AE products when plasma-based technology plays a central role in their manufacturing process. AE offers a comprehensive line of technology solutions including power conversion and control systems, process monitoring and control tools, ion-beam sources, dynamic temperature control products, and plasma abatement systems. AE technology solutions are sold and supported globally by direct offices, representatives, and distributors. Founded in 1981, AE is a publicly held company traded on Nasdaq under the symbol AEIS. More information can be found on www.advanced-energy.com.

Safe Harbor Statement
Except for any historical information contained herein, the matters discussed in this news release are forward-looking statements that involve risks and uncertainties, detailed from time to time in Advanced Energy's Securities and Exchange Commission reports, including the Company's Form 10-K and Forms 10-Q. The Company continues to be susceptible to fluctuations in quarterly and annual revenues and operating results and the volatility of the semiconductor and semiconductor capital industries. The Company assumes no obligation to update the information in this release.