6-K

                                    FORM 6-K

                        SECURITIES & EXCHANGE COMMISSION

                             Washington, D.C. 20549

                        Report of Foreign Private Issuer

                        Pursuant to Rule 13a-16 or 15d-16

                     Of the Securities Exchange Act of 1934

                                October 16, 2003

                               INFICON Holding AG

                              INFICON Holding Inc.
                 (Translation of registrant's name into English)

                                  INFICON Inc.

                              Two Technology Place

                          East Syracuse, New York 13057
                    (Address of principal executive offices)

                      (Indicate by check market whether the
                          registrant files or will file
                         annual reports under cover Form
                               20-F or Form 40-F.)

                Form 20-F [ X ] Form 40-F [  ]

        (Indicate by check mark whether the registrant by furnishing the
          information contained in this Form is also thereby furnishing
          the information to the Commission pursuant to Rule 12g3-2(b)
                   under the Securities Exchange Act of 1934.)

                      Yes [  ] No [ X ]






Enclosure:  Press release dated October 16, 2003, announcing divestiture of
ultra clean processing business unit.


                                   Signatures

Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned, thereunto duly authorized.

Date:  October 16, 2003                              INFICON Holding AG


                                     By:    /s/ Peter G. Maier
                                           ------------------------------------
                                     Name:    Peter G. Maier
                                     Title:   Vice President and Chief Financial
                                              Officer

EX-99

Corporate Contact                                  European Contact
Betty Ann Kram                                     Bernhard Schweizer/Sara Koch
Director of Corporate Communications               c-matrix group ag
and Investor Relations                             +41 (0) 41.769.80.40
+1.315.434.1122                                    inficon@cmatrix.ch
BettyAnn.Kram@inficon.com


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



                 INFICON DIVESTS ULTRA CLEAN PROCESSING BUSINESS

Syracuse, New York/Zurich, Switzerland -- October 16, 2003 -- INFICON Holding AG
(SWX Swiss Exchange and NASDAQ: IFCN) has completed the divestiture of its ultra
clean processing business unit in a management buyout. Further details of the
transaction will be disclosed with the INFICON third quarter 2003 earnings
results on October 28, 2003.

"We decided earlier this year to divest the ultra clean processing business unit
to further sharpen the INFICON long-term strategy. It is an excellent business,
however this action supports our focus on our core competencies in the front-end
of the semiconductor manufacturing process," said James Brissenden, president
and chief executive officer.

INFICON is a leading developer, manufacturer and supplier of innovative vacuum
instrumentation, critical sensor technologies, and advanced process control
software for the semiconductor and related 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 and toxic chemical analysis to the air
conditioning/refrigeration, emergency response and industrial hygiene 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. For more information about INFICON and its
products, please visit the Company's website at www.inficon.com.

This press release and oral statements or other written statements made, or to
be made, by us contain forward-looking statements that do not relate solely to
historical or current facts. Forward looking statements can be identified by the
use of words such as "may", "believe", "will", "expect", "project", "assume",
"estimate", "anticipate", "plan", "continue", "resumes", "opportunity,"
"potential", or "guidance". These forward-looking statements address, among
other things, our strategic objectives, trends in vacuum technology and in the
industries that employ vacuum instrumentation, such as the semiconductor and
related industries and the anticipated effects of these trends on our business.
These forward-looking statements are based on the current plans and expectations
of our management and are subject to a number of uncertainties and risks that
could significantly affect our current plans and expectations, as well as future
results of operations and financial condition. Some of these risks and
uncertainties are discussed in the Company's Annual Report on Form 20-F for
fiscal 2002 and the Company's reports on Form 6-K filed with the Securities and
Exchange Commission during 2003. As a consequence, our current and anticipated
plans and our future prospects, results of operations and financial condition
may differ from those expressed in any forward-looking statements made by or on
behalf of our company. We undertake no obligation to publicly update or revise
any forward-looking statements, whether as a result of new information, future
events or otherwise.