SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C. 20549


                                   FORM 6-K


                       REPORT OF FOREIGN PRIVATE ISSUER
                     PURSUANT TO RULE 13A-16 OR 15D-16 OF
                      THE SECURITIES EXCHANGE ACT OF 1934



                               October 12, 2004


                           INFINEON TECHNOLOGIES AG

                             St.-Martin-Strasse 53
                                D-81541 Munich
                          Federal Republic of Germany
                              Tel:  +49-89-234-0
                    (Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports
under cover of 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 

If "Yes" is marked, indicate below the file number  assigned  to the registrant
in connection with Rule 12g3-2(b): 82-_____.





This Report on Form 6-K contains a joint press release of Infineon Technologies
AG and Finisar  Corporation  dated  October  11,  2004,  to  announce  that the
company's have agreed to modify the terms of a previously  announced  agreement
under which Finisar is to acquire Infineon's Fiber Optics 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.
       
       
       
                                         INFINEON TECHNOLOGIES AG
       
       
       


Date: October 12, 2004                   By:    /s/ WOLFGANG ZIEBART
                                                Dr. Wolfgang Ziebart
                                                Chairman, President and        
                                                Chief Executive Officer


                                         By:    /s/ PETER J. FISCHL
                                                Peter J. Fischl
                                                Chief Financial Officer



                                                                       

[Finisar logo]                                                  [Infineon logo]


News Relese/Presseinformation

Joint News Release by Infineon and Finisar

FINISAR AND INFINEON MODIFY TERMS OF AGREEMENT

Munich/Germany  and  Sunnyvale,  Calif./USA  -- October  11,  2004 --  Infineon
Technologies AG, Muncih (FSE/NYSE:  IFX) and Finisar Corporation (NASDAQ: FNSR)
announced  today  that they have  agreed  to modify  the terms of a  previously
announced  agreement under which Finisar is to acquire  Infineon's Fiber Optics
Business Unit based in Berlin,  Germany. The terms were modified in part due to
the operating results for this business unit during the past six months.  Under
the terms of the  modified  agreement,  Finisar  will issue  approximately  110
million  shares of Finisar common stock to Infineon  compared to  approximately
135 million shares that would have been issuable under the original  agreement.
Following the transaction,  Infineon will hold a 33 percent. equity interest in
Finisar. In addition,  Infineon has agreed to provide financial assistance with
respect  to the costs of  restructuring  the  operations  of the  Fiber  Optics
Business Unit and integrating  those  operations  with Finisar's  following the
closing.

The  transaction is subject to approval by Finisar's  shareholders,  applicable
regulatory  approvals  and other  customary  closing  conditions.  Jerry Rawls,
President and CEO of Finisar, and Frank Levinson, Chairman and Chief Technology
Officer  of  Finisar,  who  own  an  aggregate  of  approximately  16%  of  the
outstanding  Finisar shares, have entered into agreements with Infineon to vote
their shares in favor of the  transaction.  The companies have already received
the required antitrust clearances in the U.S. and Europe.

As  previously  announced,   the  acquisition  will  involve  the  transfer  of
Infineon's  fiber  optic  development,  manufacturing,  and  certain  marketing
activities  and  approximately  1,200  employees.  The  Infineon  Fiber  Optics
Business Unit develops,  manufactures  and markets a broad range of fiber optic
datacom  and  telecom  modules  supporting  the  common  MSA  standards,   BIDI
components that allow bi-directional transmission

FOR THE BUSINESS AND TRADE PRESS: INFXX200410.005e


                                                                          
MEDIA RELATIONS CORPORATE    NAME:                      PHONE/FAX:                 EMAIL
WORLDWIDE HEADQUARTERS       GUENTER GAUGLER            +49 89 234 28481 / 28482   guenter.gaugler@infineon.com
U.S.A.                       CHRISTOPH LIEDTKE          +1 408 501 6790 / 2424     christoph.liedtke@infineon.com
ASIA                         KAYE LIM                   +65 6840 0689 / 0073       kaye.lim@infineon.com
JAPAN                        HIROTAKA SHIROGUCHI        +81 3 5449 6795 / 6401     hirotaka.shiroguchi@infineon.com
INVESTOR RELATIONS           EU/APAC +49 89 234 26655   USA/CAN +1 408 501 6800    investor.relations@infineon.com






                                       2


on a single  fiber  for  fiber-to-the-home  applications  (FTTH),  and  plastic
optical  fiber  (POF)  components  that  are  used in  automotive  applications
specifically, for entertainment and safety systems.

Pending the approval of Finisar's shareholders, the transaction is now expected
to close in the fourth calendar quarter of this year.

At closing,  Mr. Thomas  Seifert,  CEO of Infineon's  Memory Products Group, is
expected to join the Finisar Board of Directors.

Deutsche  Bank  Securities  is acting as sole  financial  advisor  to  Finisar,
Citigroup Global Markets is acting as sole financial advisor to Infineon.

ABOUT FINISAR
Finisar  Corporation  (NASDAQ:  FNSR) is a  technology  leader for fiber  optic
subsystems  and  network  performance  test  systems.   These  products  enable
high-speed data  communications  for networking and storage  applications  over
Gigabit Ethernet Local Area Networks (LANs) Fibre Channel Storage Area Networks
(SANs),  and  Metropolitan  Area Networks  (MANs) using IP and  SONET/SDH-based
protocols.  The  Company's  headquarters  is  in  Sunnyvale,  California,  USA.
www.Finisar.com.

ABOUT INFINEON
Infineon  Technologies AG, Munich,  Germany,  offers  semiconductor  and system
solutions for the automotive and industrial  sectors,  for  applications in the
wired  communications  markets,  secure  moblie  solutions  as well  as  memory
products.  With a global presence,  Infineon  operates in the US from San Jose,
CA, in the  Asia-Pacific  region from  Singapore  and in Japan from  Tokyo.  In
fiscal year 2003 (ending  September),  the company  achieved sales of Euro 6.15
billion with about 32,300  employees  worldwide.  Infineon is listed on the DAX
index  of the  Frankfurt  Stock  Exchange  and on the New York  Stock  Exchange
(ticker symbol: IFX). Further information is avilable at www.infineon.com.


                   This news release is available online at
                        http://www.infineon.com/news/.

FOR THE BUSINESS AND TRADE PRESS: INFXX200410.005e


                                                                          
MEDIA RELATIONS CORPORATE    NAME:                      PHONE/FAX:                 EMAIL
WORLDWIDE HEADQUARTERS       GUENTER GAUGLER            +49 89 234 28481 / 28482   guenter.gaugler@infineon.com
U.S.A.                       CHRISTOPH LIEDTKE          +1 408 501 6790 / 2424     christoph.liedtke@infineon.com
ASIA                         KAYE LIM                   +65 6840 0689 / 0073       kaye.lim@infineon.com
JAPAN                        HIROTAKA SHIROGUCHI        +81 3 5449 6795 / 6401     hirotaka.shiroguchi@infineon.com
INVESTOR RELATIONS           EU/APAC +49 89 234 26655   USA/CAN +1 408 501 6800    investor.relations@infineon.com







                                       3

SAFE HARBOR UNDER THE PRIVATE  SECURITIES  LITIGATION REFORM ACT OF 1995

Except for  statements of historical  fact,  the  statements  contained in this
press release are forward-looking  statements within the meaning of Section 21E
of the  Securities  Exchange  Act of 1934,  as  amended,  including  statements
regarding Finisar's expectations,  beliefs, intentions, or strategies regarding
the future. All  forward-looking  statements included in this press release are
based upon information  available to Finisar as of the date hereof, and Finisar
assumes  no   obligation  to  update  any  such   forward-looking   statements.
Forward-looking  statements involve risks and uncertainties,  which could cause
actual results to differ materially from those projected.  These  uncertainties
include  potential  problems related to the assimilation and integration of the
operations,  technologies and products of Infineon's Fiber Optics Business,  as
well as all risks  associated with the rapidly  evolving  markets for Finisar's
products and uncertainty regarding the development of these markets;  Finisar's
historical   dependence  on  sales  to  a  limited   number  of  customers  and
fluctuations  in the  mix of  customers  in any  period;  ongoing  new  product
development and  introduction of new and enhanced  products;  the challenges of
rapid growth  followed by periods of  contraction;  and intensive  competition.
Other risks  relating to Finisar's  business are set forth in Finisar's  Annual
Report on Form 10-K and other interim  reports as filed with the Securities and
Exchange Commission.








MEDIA CONTACTS AT FINISAR COPERATION


Steve Workman                            Shelby Palmer
Senior VP Finance, CFO                   Investor Relations
Phone: +1 408-542-4102                   Phone: +408-542-5050
Email: steve.workman@Finisar.com         Email: Investor.relations@Finisar.com


FOR THE BUSINESS AND TRADE PRESS: INFXX200410.005e


                                                                          
MEDIA RELATIONS CORPORATE    NAME:                      PHONE/FAX:                 EMAIL
WORLDWIDE HEADQUARTERS       GUENTER GAUGLER            +49 89 234 28481 / 28482   guenter.gaugler@infineon.com
U.S.A.                       CHRISTOPH LIEDTKE          +1 408 501 6790 / 2424     christoph.liedtke@infineon.com
ASIA                         KAYE LIM                   +65 6840 0689 / 0073       kaye.lim@infineon.com
JAPAN                        HIROTAKA SHIROGUCHI        +81 3 5449 6795 / 6401     hirotaka.shiroguchi@infineon.com
INVESTOR RELATIONS           EU/APAC +49 89 234 26655   USA/CAN +1 408 501 6800    investor.relations@infineon.com





                                                                     


INFINEON TECHNOLOGIES AG

BY ELECTRONIC TRANSMISSION VIA EDGAR

 Securities and Exchange Commission   Name         Francois Eksteen
 450 Fifth Street, N.W.               Department   SEC Reporting / AFR-SEC
 Washington D.C.  20549               Telephone    +49 89 / 234-21758
                                      Fax          +49 89 / 234-22964

                                      E-Mail       francois.eksteen@infineon.com
                                      Internet     www.infineon.com

                                      Date         October 12, 2004




      Re:    Infineon Technologies AG (IFX)
             Report on Form 6-K


Ladies and Gentlemen:

      Infineon Technologies AG is filing today by electronic transmission over
the Commission's Edgar system a report on Form 6-K contains a joint press
release of Infineon Technologies AG and Finisar Corporation dated October 11,
2004, to announce that the company's have agreed to modify the terms of a
previously announced agreement under which Finisar is to acquire Infineon's
Fiber Optics Business Unit.

      Please direct any questions to the undersigned at (011-49) 89-234-21758.


Sincerely yours,

/s/ FRANCOIS EKSTEEN

Francois Eksteen

Senior Director SEC Reporting