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SAN JOSE, CA - June 7, 2000 - Noah Precision, the world's leading manufacturer of independent temperature control systems for the semiconductor industry, has appointed Doug Ryder to the position of vice president of sales and marketing. Mr. Ryder's responsibilities include all aspects of sales and sales management for end-user customers and original equipment manufacturers (OEM's), as well as marketing and product management for the entire line of thermoelectric temperature control systems.

Mr. Ryder has held a variety of senior sales and marketing positions, most recently at Boxer Cross and OnTrak Systems, where he managed worldwide sales efforts and established critical relationships with major IC makers and OEM manufacturers in the semiconductor industry.

"This is an exciting time for Noah," says company founder Bob Higgins. "Doug brings a proven track record and substantial industry experience within the semiconductor capital equipment industry to Noah. His expertise will enable us to leverage our new relationship with Advanced Energy as we expand our business with both OEM's and IC manufacturers."

Since 1978, Mr. Ryder has worked in sales and marketing for semiconductor capital equipment companies including Perkin-Elmer, Therma-Wave and OnTrak Systems/ Lam Research. Throughout his career Mr. Ryder has developed and managed regional and worldwide sales organizations, established global distribution channels and established and managed strong strategic customer relationships, allowing aggressive growth in served markets.

About Noah Precision
Noah Precision, an Advanced Energy Company, is the world's leading manufacturer of independent temperature control systems for the semiconductor industry. Noah designs, manufactures, and markets dynamic temperature control products, which are incorporated into wafer process equipment to prevent temperature drift in semiconductor manufacturing processes including plasma etch, wet etch, and photolithography. Noah's products incorporate leading edge, solid-state technology, making them energy efficient, environmentally friendly, compact, and highly reliable. Advanced Energy (www.advanced-energy.com) acquired Noah Precision(www.noahprecision.com) in April 2000. Founded in 1981, Advanced Energy is a publicly held company traded on the NSDAQ under the symbol AEIS.