ATMI Atmi Inc. (MM)

ATMI, Inc. (Nasdaq:ATMI) announced that it is scheduled to present at Cowen and Company's 38th Annual Technology Media & Telecom Conference in New York City on June 3, 2010 at 9:30 a.m. local time. A webcast link will be posted on ATMI.com's investor, events and presentations page.

About ATMI

ATMI, Inc. provides specialty semiconductor materials, and high-purity materials handling and delivery solutions designed to increase process efficiencies for the worldwide semiconductor, flat panel, and life sciences industries. For more information, please visit http://www.atmi.com.

The ATMI, Inc. logo is available at http://www.globenewswire.com/newsroom/prs/?pkgid=5254

ATMI and the ATMI logo are trademarks or registered trademarks of Advanced Technology Materials, Inc., in the United States, other countries or both.

CONTACT:  ATMI, Inc.
          Dean Hamilton, Director, ATMI Investor Relations
           & Corporate Communications
          203.207.9349
          203.794.1100 x4202
          dhamilton@atmi.com