JT Corp. engages in the manufacture and sale of semiconductor testing equipment. It operates through the 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 systems; burn-in sorters; light-emitting diode(LED) probes and sorters; display drive internal combustion(DDI) pick and place handlers; DDI vision inspection systems; and laser patterns, conversion kits, and parts. The Industrial Special Gas and Facility business offer special gases and facilities. The company was founded by Hong-Jun Yoo on July 7, 1998 and is headquartered in Cheonan-si, South Korea.