Semitool to Announce First Quarter 2005 Earnings Results on January 25

    Business Editors

    KALISPELL, Mont.--(BUSINESS WIRE)--Jan. 11, 2005--Semitool, Inc. (Nasdaq:SMTL), a manufacturer of wafer processing technology and equipment for the semiconductor industry, announced today that it will release its first quarter 2005 earnings results on January 25, 2005 and will hold a conference call to discuss these results at 5:00 p.m. Eastern Time.
    To access the conference call, please dial 800-259-0251 approximately 10 minutes prior to the start of the conference call. The conference call will also be broadcast live over the Internet at Semitool's web site, www.semitool.com. You may access a replay of the conference call from 7:00 p.m. ET on January 25, 2005 until January 27, 2005 at 11:59 p.m. ET by dialing 888-286-8010 with passcode 17455402. A replay of the call will also be available for a period of 90 days on Semitool's web site.

    About Semitool, Inc.

    Semitool designs, manufactures and supports highly engineered, multi-chamber single-wafer and batch wet chemical processing equipment used in the fabrication of semiconductor devices. The company's primary suites of equipment include electrochemical deposition systems for electroplating copper, gold, solder and other metals; surface preparation systems for cleaning, stripping and etching silicon wafers; and wafer transport container cleaning systems. The company's equipment is used in semiconductor fabrication front-end and back-end processes, including wafer level packaging.
    Headquartered in Kalispell, Montana, Semitool maintains sales and support centers in the United States, Europe and Asia. The company's stock trades on the Nasdaq National Market under the symbol SMTL. For more information, please visit the company's website at www.semitool.com.

    Semitool is a registered trademark of Semitool, Inc.

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CONTACT: Semitool, Inc. Larry Viano, 406-752-2107 lviano@semitool.com or Lippert / Heilshorn & Associates, Inc. Moriah Shilton, 415-433-3777 moriah@lhai-sf.com

KEYWORD: MONTANA INDUSTRY KEYWORD: HARDWARE COMPUTERS/ELECTRONICS ADVISORY CONFERENCE CALLS SOURCE: Semitool, Inc.

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