Siemens spun out its semiconductor arm — Infineon turned it into a power, automotive and security giant
Infineon Technologies was created in 1999 when Siemens separated its semiconductor business into a standalone company. The new group inherited decades of German chip-development and manufacturing experience.
Infineon’s portfolio covered memory, communications, automotive and industrial semiconductors before the company gradually reshaped itself around markets where specialised analogue, power and embedded technology mattered most.
What followed was not a straight expansion into every adjacent market. Infineon moved through specific technical and commercial turning points that gradually changed what customers expected from it.
The 2000 IPO gave Siemens’ chip business an independent future
Infineon went public in 2000, creating a separately financed semiconductor company at the height of the technology boom.
For Infineon, access to public markets was more than a branding milestone. It increased financial transparency and created another route to fund expansion, acquisitions or long-term product development.
Qimonda separated volatile memory from the core strategy
Infineon spun off its DRAM memory business as Qimonda in 2006. The move reduced exposure to the extreme commodity cycles of memory and allowed Infineon to focus more heavily on automotive, industrial and communications semiconductors.
In semiconductor and electronics markets, this kind of capability compounds over time. Manufacturing know-how, yields, supplier relationships and process experience are difficult to recreate quickly, so each generation can strengthen the next.
International Rectifier strengthened power semiconductors
Infineon acquired International Rectifier in 2015, adding power-management products and manufacturing expertise used across industrial, automotive and energy applications.
The transaction mattered because it changed the shape of Infineon rather than simply adding revenue. It brought additional technology, customers, geographic reach or operating capability into the group and influenced the next stage of its strategy.
Cypress transformed the embedded and connectivity portfolio
The 2020 acquisition of Cypress Semiconductor expanded Infineon in microcontrollers, connectivity and automotive electronics. It also made the company more relevant to connected devices beyond its traditional power-chip strengths.
In semiconductor and electronics markets, this kind of capability compounds over time. Manufacturing know-how, yields, supplier relationships and process experience are difficult to recreate quickly, so each generation can strengthen the next.
Leaving memory made room for electrification
As of 18 September 2026, infineon is now one of the major global suppliers of automotive semiconductors, power devices, microcontrollers and security technology. Electrification, renewable energy and software-defined vehicles all increase demand for the kinds of chips the company has concentrated on since leaving memory.
The company’s current position is therefore the result of accumulated technical and commercial choices rather than one breakthrough product. That is the context future coverage should preserve.
For TechnologyBlog.co.za, this page is intended to serve as the company-history cornerstone for future Infineon coverage, so product and company-news articles can link back to one factual brand background instead of repeating the full origin story.
Primary sources checked include Infineon’s official company-history and acquisition materials. Information reflects public material available on 18 September 2026. Official company identity cross-checked against http://www.infineon.com.
