JT Corp. engages in the manufacture and sale of semiconductor testing equipment. It operates through Semiconductor Testing Equipment and Industrial Special Gas and Facility businesses. The Semiconductor Testing Equipment business provides S-LSI test, simple, and solid state drive handlers, vision inspection system, burn-in sorter, light emitting diode(LED) probe and sorter, display drive internal combustion(DDI) pick and place handler, DDI vision inspection system, laser pattern, conversion kit and parts, and others. The Industrial Special Gas and Facility business offers special gases, facilities, and others. The company was founded by Yoo Hong-Jun on July 7, 1998 and is headquartered in Cheonan, South Korea.