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About Us
Test21 Inc. is the world's leading designer and manufacturer of high-end printed circuit boards, with a main focus on all major aspects of the semiconductor testing industry.

Test21 serves semiconductor design companies, silicon wafer foundries, test houses, probe card manufacturers, and ATE manufacturers worldwide, bringing design, engineering, production, and other capabilities together, offering customers a single interface solution to all semiconductor test applications.

The company is based in California and operates in Taiwan, Japan, UK, China, and Europe.
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©2020 Test21, Inc.