AT semicon Co., Ltd. provides semiconductor packaging and testing services in South Korea and internationally. The company provides various wafer test services, as well as wafer-related test services comprising development of test programs, laser repair, automatic visual inspection, and wafer-level burn-in tests; final test services, which include tests on electric attributes, as well as development of test programs and fabrication of interfaces; and various back-end services related to semiconductor tests consisting of laser marking, visual inspection, and baking, as well as drop shipping, as well as memory, system IC, and CIS test solutions. It also offers memory test, system IC test, and CIS test solutions. The company primarily serves integrated device manufacturers and fabless enterprises. The company was formerly known as iTEST Co., Ltd. and changed its name to AT semicon Co., Ltd. in January 2014. AT semicon Co., Ltd. was founded in 2001 and is headquartered in Icheon-Si, South Korea.