MKS Instruments, a manufacturer and supplier of instruments and components used to control and analyze gases in semiconductor, completed the acquisition of Photon Control, a provider of fiber optic measurement solutions, for $387m. “We anticipate the acquisition will further advance the MKS strategy to enhance our Surround the Chamber offering by adding optical sensors for temperature control for critical etch and deposition applications in semiconductor wafer fabrication," John T.C. Lee, MKS President and CEO.