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

Fort Collins, Colorado (December 20, 1999) – Advanced Energy Industries, Inc. (AE) announces the opening of a new subsidiary in Taiwan – Advanced Energy Taiwan, Ltd. The Taiwan subsidiary is directly responsible for market development, sales, repair, and technical support in Taiwan. AE Taiwan began operations on December 15. Its location in Jung-he (Taipei County) offers easy access for AE's customers throughout Taiwan.

In announcing the new relationship, Christopher E. Near, Director of Asia Operations, said, “The opening of the Taiwan operation enhances AE's strong commitment to Asia by enhancing AE's ability to deliver world-class products and customer support to the rapidly growing requirements in Taiwan.” Mr. Near also noted, “AE has had a strong partner in Taiwan over the past ten years in our distributor there, Schmidt & Co. Schmidt helped us establish a reputation consistent with our corporate goals and ensure our leadership role in Taiwan. The Taiwan market has now reached a level where a direct, substantial AE operation is warranted.”

Advanced Energy Taiwan, Ltd. is located at 10F-6, No. 110, Chung Shan Rd., Sec. 3, Chung City, Taipei, Taiwan 235, R.O.C. Their telephone number is 886-2-82215599, and their fax number is 886-2-82215050.

Advanced Energy is a worldwide leader in the development and marketing of power conversion and control system solutions, ion-beam sources, and plasma abatement systems. Customers throughout the world use Advanced Energy’s products where plasma-based thin film technology is a critical function in their manufacturing process. These applications include the manufacture of semiconductors, CD-ROMs, DVDs, compact disks, flat panel displays, disk drives, and optical and architectural glass. In addition, Advanced Energy provides the power conversion and control system solutions of choice to a growing number of general applications in the medical, instrumentation, telecommunications, automotive, food packaging, and tool industries. Founded in 1981, AE is a publicly held company traded on Nasdaq under the symbol AEIS.