Entegris, Inc. is a provider of products and systems that purify, protect, and transport critical materials used in the semiconductor device fabrication process. Entegris operates out of its headquarters in Billerica, Massachusetts. The company has about 5,300 employees in manufacturing, service center, and research facilities in the United States, Canada, Malaysia, Singapore, Taiwan, China, Korea, Japan, Israel, Ireland, Germany, and France. The company seeks to help manufacturers increase their yields by improving contamination control in several key processes, including photolithography, wet etch and clean, chemical-mechanical planarization, thin-film deposition, bulk chemical processing, wafer and reticle handling and shipping, and testing, assembly and packaging. Approximately 80% of the company's products are used in the semiconductor industry.