488 De Guigne Dr
Sunnyvale CA 94085

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UMC USA is a part of United Microelectronics Corporation, which is one of the leading semiconductor foundries in the world. Founded in 1980, United Microelectronics Corporation provides a variety of engineering data analysis, item testing and visual inspection services. The company offers advanced technologies and manufacturing services to customers in the integrated chip industry. It owns and operates more than five wafer manufacturing facilities. The company operates in the United States, Taiwan, Japan and Singapore. It provides manufacturing status on Web site. The company manages a staff of over 11,000 people throughout the world. It additionally maintains a mask tooling department.