In some semiconductor manufacturing processes, the machinery, equipment, and containers that are used need to have heat resistance and chemical purity. Under such conditions, chemical elements must not be transferred, and this includes reactions with semiconductor materials and traces. Furthermore, in semiconductor treatment processes, focus is placed on high purity and whether volatile substances are present. Quartz glass is just about the only material that can meet all these requirements, and as such we offer quartz processed goods and materials for semiconductor industry applications, quartz lamp materials used in cleaning processes, materials for quartz tanks, quartz glass materials for optics used in exposure processes and so on, quartz crucibles for silicon single crystal pulling, lamp materials used in cleaning processes, and quartz glass for optics in exposure equipment.