German semiconductor maker Infineon Technologies has inaugurated a new manufacturing facility in Samut Prakan, marking one of the most significant recent additions to Thailand’s semiconductor ecosystem. The project, valued at about US$1.4 billion by Thailand’s Board of Investment, is designed as a backend manufacturing site covering power modules, discrete devices, wafer testing and research and development.
Key points
- Infineon has opened a new Thailand semiconductor facility valued at about US$1.4bn by the BOI.
- The site focuses on power modules, semiconductor testing and R&D, serving EVs, energy systems and data centres.
- Thailand’s September manufacturing PMI rose to 54.3, its highest level since December 2025.
The plant initially provides up to 30,000 square metres of cleanroom space, with the site capable of eventually expanding to around 150,000 square metres. Infineon says the facility will support demand from electric vehicles, energy systems, data centres and other advanced electronics, placing Thailand more firmly inside supply chains benefiting from electrification and AI-related infrastructure investment.
The investment is also significant because it goes beyond conventional assembly. Thailand’s BOI has tied the project to technology transfer and skills development, including training for more than 600 Thai science and technology personnel, overseas specialist training and collaboration with Thai universities. At full development, the project is expected to create more than 5,000 jobs and strengthen the domestic supplier ecosystem.
The timing is favourable. Thailand’s manufacturing PMI rose to 54.3 in September from 53.8 in August, its highest reading since December 2025, with output expanding at its fastest pace in nine months and new orders recording their strongest growth in six months. The data suggest that the investment story is being supported by a broader improvement in manufacturing activity rather than occurring in isolation.
Infineon’s arrival also provides a concrete test of Thailand’s recently approved semiconductor strategy, which targets roughly US$80 billion in cumulative investment by 2050. The challenge now is to use anchor investors to build local engineering capabilities, suppliers and R&D rather than allowing Thailand to remain concentrated mainly in lower-value backend operations.
Why it matters: The Infineon plant turns Thailand’s semiconductor ambitions into a tangible investment project with manufacturing, skills and R&D components. It could help Thailand capture more value from the AI, EV and energy-transition supply chains if the investment generates a wider domestic technology ecosystem.
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