ChipMOS TECHNOLOGIES INC. engages in the research, development, manufacture, and sale of high-integration and high-precision integrated circuits, and related assembly and testing services in the People's Republic of China, Taiwan, Japan, Singapore, and internationally. It operates through Testing; Assembly; Testing and Assembly for LCD, OLED and Other Display Panel Driver Semiconductors; Bumping; and Others segments. The company provides a range of back-end assembly and testing services, including engineering test, wafer probing, and final test of memory and logic/mixed-signal semiconductors, as well as leadframe-based and organic substrate-based package assembly services for memory and logic/mixed-signal semiconductors; and gold bumping, and testing and assembly services for LCD, OLED, and other panel display driver semiconductors. Its semiconductors are used in personal computers; office automation and consumer electronics; and communications equipment applications. The company was incorporated in 1997 and is headquartered in Hsinchu City, Taiwan.