YEST Co., Ltd. engages in manufacturing semiconductor equipment and products. Its products include burn-in board, Zener diode, epitaxy system, heating jacket, furnace, and chiller. It operates through the following divisions: Semiconductor and Display Equipment, Semiconductor Process Infrastructure Components, Lens BiZ, and Semiconductor Process Components. The Semiconductor and Display Equipment division includes chiller, pressurized cure, furnace, lamination, autoclave, and oven. The Semiconductor Process Infrastructure Components division offers heating jackets and clean hoods. The Lens BiZ division refers to aspherical glass lens. The Semiconductor Process Components division provides industrial blades using diamonds. The company was founded on March 6, 2000 and is headquartered in Pyeongtaek-si, South Korea.