Ultra Clean Holdings, Inc.

Ultra Clean Holdings, Inc. is engaged in the development, manufacture and supply of critical subsystems for the semiconductor capital equipment, flat panel, medical, energy and research industries. The company develops, designs, prototypes, engineers, manufactures and test subsystems which are specialized and tailored to specific steps in the semiconductor manufacturing process as well as the manufacturing processes in other addressed industries. It sells gas delivery systems and other critical subsystems, including chemical mechanical planarization subsystems, chemical delivery modules, top-plate assemblies, frame assemblies, process modules and other high level assemblies. The company was founded in November 2002 and is headquartered in Hayward, CA.