Amkor Technology, Inc. is a semiconductor product packaging and test services provider. The company has been headquartered in Arizona, since 2005, when it was moved from West Chester, Pennsylvania, also in the United States. The company's Arizona headquarters was originally in Chandler, then later moved to Tempe. The company was founded in 1968 and, as of 2022, has approximately 31,000 employees worldwide and a reported $7.1 billion in sales. With factories in China, Japan, Korea, Malaysia, Philippines, Portugal, Taiwan and Vietnam, Amkor is a major player in the semiconductor industry. It designs, packages and tests integrated circuits for chip manufacturers. Wikipedia