ATMI to Announce Third Quarter 2004 Financial Results on October 20th

ATMI to Announce Third Quarter 2004 Financial Results on October
20th 


DANBURY, Conn., Sept. 20  /PRNewswire-FirstCall/ -- ATMI, Inc. (NASDAQ:ATMI)
today announced that it intends to release third quarter 2004 financial results
before the Market's open on October 20, 2004. ATMI will host a conference call
at 11:00 am Eastern the same day to review and discuss the results, at
800.289.0544. Interested parties may also listen to the conference call via
audio streaming on the Internet at ATMI.com. A replay of the call will be
available by phone for 48 hours at 888.203.1112 (access code 732967) and on the
web for one month at ATMI.com.

Also, ATMI is scheduled to present at the Piper Jaffrey West Coast Technology
Conference in San Francisco on October 27, at 1:10 pm local time.

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 atmi.com. 

DATASOURCE: ATMI, Inc.



CONTACT:  Dean Hamilton of ATMI, [phone], Direct,

[phone], ext. 4202, 



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

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