Aehr Test Systems is engaged in the designing, manufacturing, and marketing of advanced test and burn-in products to the semiconductor manufacturing industry. The company's principal products are the Advanced Burn-In and Test System (ABTS), the FOX full wafer contact parallel test and burn-in systems, WaferPak full wafer contactor, the DiePak carrier and test fixtures. The group assembles its products from components and parts manufactured by others, including environmental chambers, power supplies, metal fabrications, printed circuit assemblies, ICs, burn-in sockets, high-density interconnects, wafer contactors and interconnect substrates. Geographically the firm has sales and service operations in the United States, Japan, Germany, and Taiwan.