ATMI to Present at Investor Conferences

ATMI to Present at Investor Conferences 


DANBURY, Conn., May 3  /PRNewswire-FirstCall/ -- ATMI, Inc. (NASDAQ:ATMI) today
announced that it is scheduled to present at investor conferences in May and
June 2005. Where available, webcast links will be posted on atmi.com's investor
page.

  May

   * 4th - Merrill Lynch Tech Gathering, New York City

   * 12th - Piper Jaffray Technology Conference, New York City, 1:10 p.m.
            local time.

   * 24th - ATMI Annual Shareholder Meeting, Danbury, Connecticut, 10 a.m.
            local time.

  June

   * 1st - Smith Barney Citigroup's 6th Annual Semiconductor Conference,
           Monterey, California, 1:30 p.m. local time.



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

DATASOURCE: ATMI, Inc.



CONTACT:  Dean Hamilton, ATMI Investor & Public Relations, direct,

[phone], [phone] ext. 4202,  



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

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