For more information, contact:

Jim Donaldson Advanced Energy Industries, Inc. 970.407.6374

Marna Shillman Advanced Energy Industries, Inc. 970.407.6280 marna.shillman@aei.com

June 25, 1999—Advanced Energy Industries, Inc. (AE) announced today that it has appointed Acatec Comercio e Representacoes, Ltda. (Acatec) as exclusive distributor for its products in Brazil. Acatec is located in Sao Paolo. Until now, AE has been providing its power conversion and control products to the growing industrial and vacuum systems market in Brazil by direct sale. The appointment of Acatec will enable AE to better support its existing customer base and to provide leadership and direction to AE in expanding sales in that important market.

In announcing the new relationship, Christopher E. Near, Asia Manager, said, “Part of AE’s on-going mission is to expand and continually improve our global customer support. I’m pleased to announce the Acatec partnership. Acatec’s solid experience in the vacuum industry makes them a strong addition to our worldwide sales and service network.”

Acatec is located at Rua dos Comerciarios, 354, Sao Paulo, 04320-030, Brazil. Their telephone number in Brazil is 55-11-5588-4392, and their telefax number is 55-11-5588-4919.

Advanced Energy Industries, Inc. is a leading developer and manufacturer of power supplies and related products that are critical in the manufacturing of semiconductors, data storage devices, flat panel displays, and other industrial products using plasma based, thin-film technology, such as glass coatings, decorative coatings, and optical coatings. AE has direct offices in the USA, England, Germany, Japan, and Korea, and has representative and distributors in Australia, China, India, Israel, Italy, Mexico, Russia, Singapore, Sweden, Taiwan, Turkey, and the USA. Founded in 1981, AE is a publicly held company traded on Nasdaq, ticker symbol AEIS. Its web site address is www.advanced-energy.com.