Justem (also known as ㈜저스템) is a company that develops and manufactures equipment for semiconductor production, display manufacturing, solar cell fabrication, secondary battery assembly, and plasma processing. It provides environment control systems for semiconductor manufacturing, including contamination-free buffers, load port modules, built-in purge systems, semiconductor modules, jigs, parts, and refurbished products. The company supplies these products to manufacturers in the semiconductor, display, solar cell, battery, and plasma processing sectors.