CHASKA, Minn.--(BUSINESS WIRE)--April 29, 2005--Entegris, Inc. (Nasdaq:ENTG), the materials integrity management company, today announced that it is scheduled to attend the Merrill Lynch Technology Gathering in New York on May 3-4th, 2005.

In addition, Entegris will attend and present at the Piper Jaffray Technology Conference in New York on May 11-12th, 2005. The presentation for Piper Jaffray is scheduled for May 12, 2005 at 8:30 a.m. (ET) and will be webcast and available via Entegris' web site at www.entegris.com.

ABOUT ENTEGRIS

Entegris products and services protect and transport the critical materials that enable the world's leading technologies. Entegris is a leading materials integrity management company providing products and services used from production to consumption in the semiconductor, data storage, chemical processing, pharmaceutical, fuel cell and other key technology-driven industries worldwide.

Headquartered in Chaska, Minn., Entegris has manufacturing facilities in the United States, Germany, Japan and Malaysia and is ISO 9001 certified. Directly and through alliances with Metron Technology and other distributors, Entegris provides customer support on six continents. Additional information can be found at www.entegris.com

CONTACT: Entegris, Inc., Chaska
Public Relations:
Bill Paterson, 952-556-4155
bill_paterson@entegris.com
or
Investor Relations:


Heide Erickson, 952-556-8051
heide_erickson@entegris.com

SOURCE: Entegris, Inc.