CHASKA, Minn., March 6, 2008 -- Entegris, Inc. (Nasdaq: ENTG) announced today it signed an agreement to purchase a 14 percent equity stake of privately held Integrated Materials, Inc. (IMI) for $8 million. IMI is a Sunnyvale, California-based supplier of poly silicon products used to improve the productivity of semiconductor manufacturing diffusion processes. Under the agreement, Entegris intends to purchase the remaining equity of IMI upon completion of certain closing conditions.

Gideon Argov, president and chief executive officer of Entegris, said: "The access to IMI's breakthrough materials technology dovetails with our focus on improving the productivity of our semiconductor customers by controlling contamination in their manufacturing process. IMI's unique, consumable solution, which uses a poly silicon material to significantly reduce particle contamination and improve yields, extends our wafer handling business and material science expertise."

Daniel Rubin, president and chief executive officer of IMI, commented: "We are excited to have a partner with the product portfolio, industry success and experience of Entegris. Their global footprint, local support and applications capabilities will allow IMI to expand geographically from our current top tier semiconductor customers."

IMI's core products are high temperature wafer carriers which are used to support the semiconductor wafer while it is being processed inside the diffusion furnace chamber of a semiconductor manufacturing tool.

About Entegris

Entegris is a leading provider of a wide range of products for purifying, protecting and transporting critical materials used in processing and manufacturing in semiconductor and other high-tech industries. With annual sales of $626 million, Entegris is ISO 9001 certified and has manufacturing, customer service and/or research facilities in the United States, China, France, Germany, Israel, Japan, Malaysia, Singapore, South Korea and Taiwan.