UMC Xiamen (United Semiconductor) · 联芯集成电路制造（厦门）有限公司
United Microelectronics Corporation (UMC) | Fab
Southern China’s first 12-inch foundry fab, a UMC joint-venture entity branded United Semiconductor; began volume production in 2016.
TipWhy This Matters
Southern China’s first 12-inch foundry fab, a UMC joint-venture entity branded United Semiconductor; began volume production in 2016.
Chinese name: 联芯集成电路制造（厦门）有限公司 (Liánxīn Jíchéng Diànlù Zhìzào (Xiàmén) Yǒuxiàn Gōngsī)
What does this facility make?
12-inch (300mm) wafers at mature/legacy process nodes for foundry customers.
Why does it matter?
A second Taiwanese foundry major (alongside TSMC) with an operating mainland China fab, reinforcing that cross-strait manufacturing links persist in mature-node foundry work even as the leading-edge relationship (TSMC’s most advanced nodes, UMC’s own frontier R&D) stays firmly based in Taiwan.
Key Facts
| Company | United Microelectronics Corporation (UMC) |
| Type | Fab |
| Category | Foreign-Invested |
| Capability | 12-inch (300mm) wafer foundry, mature/legacy nodes |
| Status | Operational |
| Capacity | Not yet recorded |
| Investment | ¥35亿元 |
| Funding Source | Foreign |
| Location | Xiamen, Fujian |
| Current Node | Not yet researched |
| Entity List | No |
| Equipment Origin | Not yet assessed |
| Last Verified | Not recorded (newest source dated Sep 2026) |
Technical Complexity
2.5/5
Technology Node Trajectory
Node history not yet researched.
Project Timeline
- Jan 2016 — Begins volume production as southern China’s first 12-inch foundry fab
Sources
- UMC opens new 12-inch wafer fab in China (Cleanroom Technology) (28 Sep 2026)
- UMC Agrees to 12” Fab Joint Venture in China (EE Times) (28 Sep 2026)
- UMC to pour CNY3.5 billion into China 12-inch fab operation (Digitimes) (12 Feb 2020)