CHASKA, Minn.--(BUSINESS WIRE)--Feb. 27, 2005--Entegris, Inc., (Nasdaq:ENTG) announced today that the company signed a license patent agreement last week covering its 300 mm wafer carriers with one of its three major Japanese competitors in the wafer carrier market. The agreement includes royalty payments to Entegris for past and future shipments of 300 mm wafer carriers by the competitor. Entegris officials say this step further affirms the company's right and responsibility to safeguard its intellectual property. (The two companies signed a letter of intent on this matter that was announced by Entegris December 6, 2004, news release - you may view this release at: http://www.entegris.com/pressroom/PR/resources/wi_284828974.html)

"Entegris protects its intellectual property rights. Licensing our 300 mm front opening wafer carrier technology provides customers the best access to this industry leading technology, while Entegris continues to invest in the next generation technology," said Patrick McKinney, Entegris senior vice president of worldwide sales. "We've invested heavily in our state-of-the-industry wafer carrier technology, and we will license our technology in a fair and non-discriminatory manner to all our competitors in accordance with SEMI standards. We believe this agreement is a sound and responsible framework to build upon for the future."

Entegris has earned approval for 184 USA patents and 286 foreign patents on its advanced technology discoveries. While Entegris produced several royalty-generating patent licenses in the past, this is the first one on its 300 mm FOUP and FOSB wafer carrier portfolio.

ABOUT ENTEGRIS

Entegris products and services protect and transport the critical materials enabling the world's leading technologies. As a leading materials integrity management company, Entegris provides products and services used in key technology industries including semiconductor, data storage, chemical processing, biopharmaceutical, medical device and fuel cell. Entegris is ISO 9001 certified and has manufacturing or service facilities in the United States, Germany, France, Japan, Malaysia and Singapore. Its advanced research laboratories are located in Minnesota and Colorado, USA. Directly and through 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.