On October 1, 2026, Infineon Technologies opened a new backend manufacturing site in Bangkok (Samut Prakan province), Thailand. The opening ceremony was attended by Thai Prime Minister Anutin Charnvirakul and Infineon Chief Operating Officer (COO) Alexander Gorski.

The new site is a greenfield plant built from the ground up and starts operations with its first building, Module A. It is designed to expand to up to five modules, and Infineon says it could become one of the company's largest backend sites in the future.

Site overview

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01

Location

Bangkok (Samut Prakan province), Thailand. Opened October 1, 2026.

02

Scale

Operations start with Module A. Designed to expand to up to five modules.

03

Headcount

About 350 today, rising to about 1,000 as Module A ramps up.

04

Processes

The full range of semiconductor backend processes (assembly and test) plus wafer test. Highly automated, including cleanrooms.

05

Applications

High-value products for automotive, industrial and energy infrastructure.

06

Power

Runs on 100% green electricity. Features water recycling, rainwater harvesting and on-site solar power.

Backend manufacturing is the stage where wafers patterned in the frontend are diced, assembled into packages and tested. In power semiconductors, module and package quality determines product reliability. Infineon highlights that the Bangkok site handles wafer test in addition to assembly and test.

An investment paired with frontend expansion

At the opening of the Dresden fab in July, Infineon cited AI data center power, renewable energy, power grids and SDVs as the main applications. As frontend capacity grows, matching assembly and test capacity is needed. COO Gorski pointed to the site's central location in Southeast Asia and strong logistics, saying the regional diversification of the manufacturing network gives customers flexible supply capacity.

What it means for procurement and quality assurance

  • Adding a production site entails qualification work: especially for automotive, changing or adding an assembly site often requires customer re-qualification. As Module A ramps up, identify which part numbers will receive process change notifications (PCNs) from Infineon
  • Supply diversification: more backend sites reduce the risk of assembly and test being concentrated in a specific country or region. When evaluating suppliers, check frontend and backend sites separately
  • Power used in production: the site runs on 100% green electricity. If you request product carbon footprint (PCF) data from suppliers, the figures may vary depending on which backend site is used

Referenced Fact Cards