LiquidLens(TM) system represents major Entegris-Mykrolis merger success story

July 6, 2006 — /BUSINESS WIRE/ — CHASKA, Minn. — Entegris, Inc. (Nasdaq:ENTG) announced today that it will introduce its LiquidLens(TM) UPW (ultrapure water) purification system next week at the semiconductor global trade show SEMICON West 2006 in San Francisco. This immersion lithography innovation combines advanced technology and process expertise from both Entegris and the former Mykrolis as a result of their merger in August 2005.

Immersion is the newest lithography technique for printing 45 nanometer (nm) or smaller features on semiconductor wafers, using ultra pure water between the optical lens and the wafer. The UPW lens is utilized to significantly improve image resolution. The water must be extremely pure as the smallest impurity can damage image resolution, react with the photoresist, or contaminate the lens. To achieve this requirement, the LiquidLens(TM) system provides the highest water purity level at the temperature and pressure required. Entegris has delivered several LiquidLens(TM) systems for evaluation and process development use to several major customers. According to Entegris, these leading companies are turning to the LiquidLens(TM) system to ensure that precisely controlled UPW is provided to advanced lithography processes as the companies move to production.

“The Entegris merger with Mykrolis has already produced many synergies, and we continue to find new ways to combine our technologies and process expertise to deliver solutions for the major process challenges the semiconductor industry faces today,” said Todd Edlund, vice president and general manager of liquid systems for Entegris. “The LiquidLens system is a great example of the capabilities of the new Entegris, and further strengthens our performance and leadership with advanced processes in the dynamic lithography field.”

ABOUT ENTEGRIS

Entegris (merged with Mykrolis in August 2005) is the global leader in materials integrity management – delivering a wide range of products for purifying, protecting and transporting critical materials used in processing and manufacturing in semiconductor and other high tech industries. Entegris is ISO 9001 certified and has manufacturing, customer service or research facilities in the United States, China, France, Germany, Japan, Malaysia, Singapore, South Korea and Taiwan. Additional information can be found at www.entegris.com.

Contacts
Entegris, Inc., Chaska
Public Relations:
Bill Paterson, 952-556-4155
[email protected]

or

Investor Relations:
Steve Cantor, 978-436-6750
[email protected]

http://www.entegris.com