INFICON Publishes Half-Year Report 2005

Syracuse, New York/Zurich, Switzerland - September 30, 2005 - INFICON (SWX Swiss Exchange: IFCN), a leading manufacturer of instrumentation and process control software for the semiconductor and vacuum-coating industries and other industrial applications, today published a Half-Year Report including results of the first six months of 2005 as presented on July 20, 2005. The INFICON Half Year 2005 Report is available in the Investor Relations section of the INFICON website www.inficon.com and is also attached to this media release. Printed-out copies are available by request at investor.relations@inficon.com.

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ABOUT INFICON
INFICON is a leading developer, manufacturer and supplier of innovative instrumentation, critical sensor technologies, and advanced process control software for the semiconductor and vacuum-coating industries and other industrial applications. These analysis, measurement and control products are vital to original equipment manufacturers (OEMs) and end-users in the complex manufacturing of semiconductors, flat panel displays, magnetic and optical storage media and precision optics. INFICON also provides essential instrumentation for gas leak detection to the air conditioning/refrigeration industries and toxic chemical analysis for the emergency response and security markets. Headquartered in Syracuse, New York, INFICON has world-class manufacturing facilities in the United States and Europe and worldwide offices in the U.S., China, France, Germany, Japan, Korea, Liechtenstein, Singapore, Switzerland, Taiwan, and the United Kingdom. INFICON is a publicly listed company, registered with the Swiss Stock Exchange (SWX). For more information about INFICON and its products, please visit www.inficon.com.

Corporate Contact
Betty Ann Kram
Director of Corporate Communications and Investor Relations
+1.315.434.1122
BettyAnn.Kram@inficon.com

European Contact
Bernhard Schweizer
sensus PR GmbH
+41.43.366.5511
bschweizer@sensus.ch

North American Contact
Jody Burfening/Harriet Fried
Lippert/Heilshorn & Associates, Inc.
+1.212.838.3777
jbs@lhai.com