[3][6] Infineon markets semiconductors and systems for automotive, industrial, and multimarket sectors, as well as chip card and security products.

Infineon's high power segment is in Warstein, Germany; Villach, Graz and Linz in Austria; Cegléd in Hungary; and Italy.

The industrial division of the company (named IPC until 2023 [13]) includes power semiconductors and modules which are used for generation, transmission and consumption of electrical energy.

Those find application in lighting management systems and LED lighting, power supplies for servers, PCs, notebooks and consumer electronics, custom devices for peripheral devices, game consoles, applications in medical technology, high-frequency components having a protective function for communication and tuner systems and silicon MEMS microphones.

At its height Qimonda employed about 13,500 people; it was listed on the New York Stock Exchange until it filed for bankruptcy with the district court in Munich in January 2009.

[17] When Infineon sold Wireline Communications in July 2009 to Golden Gate Capital for €250 million,[18] the resulting company was named Lantiq.

[24] In August 2014 Infineon Technologies agreed to buy the International Rectifier Corporation (IR) for about US$3 billion,[25] one third by cash and two-thirds by credit line.

[27] In July 2016, Infineon agreed to buy the North Carolina–based company Wolfspeed from Cree Inc. for US$850 million in cash,[28] although the deal was ultimately stopped due to US security concerns.

The MEMS lidar system can scan up to 5,000 data points a second with a range of 250 meters, with an expected unit cost of $250 in mass production.

[38] Infineon in 2023 acted on an expansion plan by investing EUR 5 billion into its semiconductor fab in Kulim, Kedah, Malaysia.