Ultra Clean Holdings, Inc. designs, develops, prototypes, engineers, manufactures, and tests subsystems tailored to specific steps in the semiconductor manufacturing process and manufacturing processes in other addressed industries primarily in North America, Asia, and Europe. It offers precision robotic systems that are used when accurate controlled motion is required; robotic surgery products; gas delivery systems, which include one or more gas lines consisting of small diameter internally polished stainless steel tubing, filters, mass flow controllers, regulators, pressure transducers and valves, and an integrated electronic and/or pneumatic control system; and various industrial and automation production equipment products. The company also provides chemical mechanical planarization subsystems; chemical delivery modules that deliver gases and reactive chemicals in a liquid or gaseous form from a centralized subsystem to the reaction chamber; top-plate assemblies; and frame assemblies that are support structures fabricated from steel tubing or folded sheet metal. In addition, it offers process modules, which are the subsystems of semiconductor manufacturing tools that process integrated circuits onto wafers; and other high level assemblies. The company primarily serves original equipment manufacturers in the semiconductor capital equipment, consumer, medical, energy, industrial, flat panel, and research industries. Ultra Clean Holding, Inc. was founded in 1991 and is headquartered in Hayward, California.