Jui Jung Lo

Advanced Semiconductor Engineering, Inc. engages in the provision of independent semiconductor manufacturing services. It operates through the following segments: Packaging, Testing, and Electronic Manufacturing Services (EMS). The Packaging segment involves in the production of bare semiconductors into finished semiconductors with electrical and thermal characteristics. The Testing segment offers front-end engineering testing, wafer probing and final testing services. The EMS segment designs, assembles, and markets electronic components and telecommunications equipment motherboards. The company was founded by Chien Shen Chang and Hung Pen Chang on March 23, 1984 and is headquartered in Kaohsiung, Taiwan.

ASE Test Ltd. provides semiconductor testing services. Its testing services include front-end engineering test, wafer probe, final test and other test-related services. It offers logic/mixed-signal final testing for semiconductors used for networking and wireless communications, graphics and disk controllers for home entertainment and personal computer applications. The company was founded in 1987 by Jason C.S. Chang and is located in Kaohsiung, Taiwan

Part of ASE Technology Holding Co., Ltd., ASE Test, Inc. engages in testing of integrated circuits. The company is based in Kaohsiung City, Taiwan.