ATMI to Sell Epitaxial Services to International Rectifier

ATMI to Sell Epitaxial Services to International Rectifier 


DANBURY, Conn., June 29  /PRNewswire-FirstCall/ -- ATMI, Inc. (NASDAQ:ATMI), a
supplier of materials and materials packaging to the world's leading
semiconductor manufacturers, today announced it entered into a definitive
agreement to sell its specialty silicon epitaxial services business located in
Mesa, Arizona, to International Rectifier Corporation (NYSE:IRF), a world
leader in power management technology, subject to customary closing conditions
and certain third party approvals.

Gene Banucci, ATMI Chief Executive Officer, said, "International Rectifier has
been a major customer of ATMI's specialty epi services for years, so the Epi
Services employees are very familiar with IR's needs and requirements. These
employees are going to reap the advantages of joining a world leader devoted to
advanced power management products that require specialty epitaxial steps. 
International Rectifier is getting an employee base with innovative knowledge
in specialty silicon and silicon germanium epitaxy, and key intellectual
property."

Dan Sharkey, ATMI Chief Financial Officer, said, "This cash deal is expected to
close within the next several weeks and will result in a recognition of a
slight gain upon the disposition of this discontinued operation."

About International Rectifier

International Rectifier (NYSE:IRF) is a world leader in power management
technology. IR's analog and mixed signal ICs, advanced circuit devices,
integrated power systems and components enable high performance computing and
reduce energy waste from motors, the world's single largest consumer of
electricity.  Leading manufacturers of computers, energy efficient appliances,
lighting, automobiles, satellites, aircraft and defense systems rely on IR's
power management benchmarks to power their next generation products.  For more
information, go to http://www.irf.com/.

ATMI provides specialty materials and materials packaging to the worldwide
semiconductor industry.  As the Source of Semiconductor Process Efficiency,
ATMI helps customers improve wafer yields and lower operating costs.  For more
information, please visit http://atmi.com/.

Statements contained herein that relate to ATMI's future performance,
including, without limitation, statements with respect to ATMI's anticipated
results of operations or level of business for 2004 or any other future period,
are forward-looking statements within the safe harbor provisions of the Private
Securities Litigation Reform Act of 1995.  Such statements are based on current
expectations only and are subject to certain risks, uncertainties, and
assumptions, including, but not limited to: changes in semiconductor industry
growth or ATMI's markets; competition, problems, or delays developing and
commercializing new products; problems or delays in integrating acquired
operations and businesses into ATMI; problems or delays associated with any
restructuring activity, or implementing any strategy, including resolution of
the various discontinued elements of ATMI's Technologies segment; and other
factors discussed in ATMI's filings with the Securities and Exchange
Commission.  Such risks and uncertainties could cause actual results to differ
from those projected.  ATMI undertakes no obligation to publicly update or
revise any forward-looking statements, whether because of new information,
future events or otherwise. 

DATASOURCE: ATMI, Inc.



CONTACT:  Dean Hamilton of ATMI, Inc., Direct - [phone], or

[phone], ext. 4202, 



Web site:  http://www.atmi.com/

http://www.irf.com/ 

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