1Q 2011 results: Success story continues with record 19.2 percent Total Segment Result margin on Revenue from Continuing Operations of Euro 922 million

Quarterly revenue down 2 percent sequentially largely due to currency effects Total Segment Result of Euro 177 million, a 4 percent increase from prior quarter 2Q 2011 outlook: Revenue expected to be up slightly, Total Segment Result margin between 18 and 20 percent FY 2011 outlook raised: Mid-teens revenue growth with high teens Total Segment Result margin Neubiberg, Germany – February 1, 2011 – Infineon Technologies AG (FSE: IFX / OTCQX: IFNNY) today reported results for the first quarter of the 2011 fiscal year, ended December 31, 2010. Full version of news release (PDF) (incl. financial data)

About Infineon Infineon Technologies AG, Neubiberg, Germany, offers semiconductor and system solutions addressing three central challenges to modern society: energy efficiency, mobility, and security. In the 2010 fiscal year (ending September 30), the company reported sales of Euro 3.295 billion with approximately 26,650 employees worldwide. With a global presence, Infineon operates through its subsidiaries in the U.S. from Milpitas, CA, in the Asia-Pacific region from Singapore, and in Japan from Tokyo. Infineon is listed on the Frankfurt Stock Exchange (ticker symbol: IFX) and in the USA on the over-the-counter market OTCQX International Premier (ticker symbol: IFNNY). Further information is available at www.infineon.com.