Entegris

Supplier of materials for semiconductor and other high-tech industries, with approximately 7,700 employees and global manufacturing, customer service, and research facilities in the US, Canada, China, Germany, Israel, Japan, Malaysia, Singapore, South Korea, and Taiwan; headquartered in Billerica, Massachusetts. Focuses on contamination control in semiconductor processes including photolithography, wet etch and clean, chemical-mechanical planarization, thin-film deposition, bulk chemical processing, wafer and reticle handling and shipping, testing, assembly, and packaging; ~80% of products used in semiconductors.