Worlds (Chongqing) Semiconductor · 重庆万国半导体科技有限公司
Worlds (Chongqing) Semiconductor Technology Co., Ltd. | Fab
The AOS–Chongqing JV (registered April 2016; AOS reported initial capitalisation of $330M and total capitalisation of $379M by November 2019, split 51% AOS / 49% Chongqing funds at formation) that the Wikipedia fab list shows as ‘under construction’. It has in fact been in 12-inch mass production since mid-2019. In July 2025 AOS agreed to sell about 20.3% of the JV for $150M to SIMIC Holdings Co., Ltd. (reportedly Shanghai Xinwei Technology Group); the sale completed in May 2026, moving the fab toward Chinese control.
Chinese name: 重庆万国半导体科技有限公司 (Chóngqìng Wànguó Bàndǎotǐ Kējì Yǒuxiàn Gōngsī)
What does this facility make?
12-inch MOSFET/analog power devices and modules for consumer, industrial and EV-adjacent applications.
Why does it matter?
A case study in how a US-designed power-semi fab in inland China changes hands without ever closing — the stake sale to a Shanghai tech-asset group mirrors the broader pattern of foreign-origin fabs being absorbed into domestic capital structures.
Key Facts
| Company | Worlds (Chongqing) Semiconductor Technology Co., Ltd. |
| Type | Fab |
| Category | JV |
| Capability | 12-inch power semiconductors (MOSFET/analog) + on-site assembly/test — marketed at launch as China’s first integrated 12-inch power-device fab; phase-1 20,000 wafers/month (mass production from July–September 2019, per AOS), phase-2 target 50,000/month |
| Status | Operational |
| Capacity | Not yet recorded |
| Investment | $379M |
| Funding Source | Foreign |
| Location | Chongqing, Chongqing Municipality |
| Current Node | Not yet researched |
| Entity List | No |
| Equipment Origin | Not yet assessed |
| Last Verified | Not recorded (newest source dated May 2026) |
Technical Complexity
2.5/5
Technology Node Trajectory
Node history not yet researched.
Project Timeline
- Apr 2016 — Company registered in Chongqing Liangjiang New Area (AOS + local state funds)
- Jun 2018 — Phase-1 fab + assembly/test trial production (20,000 wafers/month)
- Jul 2019 — 12-inch Phase 1 mass production begins (AOS fiscal Q1 2020, July–September 2019); marketed as China’s first integrated 12-inch power fab (company claim)
- Jul 2025 — AOS agrees to sell 20.3% of the JV (about half its 39.2% stake) for ~$150M to SIMIC Holdings Co., Ltd. (reportedly Shanghai Xinwei); sale completed May 2026
Sources
- AOS Announced $150 Million Sale of a Portion of its Equity Interest in CQJV (14 Jul 2025)
- Alpha & Omega Semiconductors (AOSL) Completes Sale of Interests in China-based Joint Venture (12 May 2026)
- AOSL November 2019 IR Presentation (26 Nov 2019)
- Alpha and Omega Semiconductor Limited Announces Joint Venture Agreement in China (29 Mar 2016)