Top 7 China Chip Packaging & Testing Companies (2025)
China's chip packaging and testing industry, known as OSAT (Outsourced Semiconductor Assembly and Test), represents a critical segment of the semiconductor supply chain where Chinese companies have achieved global competitiveness. In 2025, China's OSAT market exceeds CNY 300 billion, with domestic companies capturing over 35 percent of the global OSAT market share. Advanced packaging technologies including 3D IC stacking, chiplet integration, and fan-out wafer-level packaging (FOWLP) have become key battlegrounds as China seeks to overcome limitations in advanced front-end manufacturing. Chinese OSAT companies are investing heavily in 2.5D/3D packaging, silicon interposer, and heterogeneous integration capabilities.
TL;DR
China's OSAT market exceeds CNY 300 billion with 35%+ global market share. Advanced packaging (3D IC, chiplet) is the strategic priority. Top 7 companies: JCET, TFME (Amkor joint), Tongfu Microelectronics, Huatian Technology, Wingtech Technology, Shinda, and CIPM.
Key Insights
JCET (长电科技)
China's largest and world's third-largest OSAT company. Leads in advanced packaging including 2.5D/3D IC, fan-out, and chiplet integration. Acquired STATS ChipPAC and operates globally with major customers including Qualcomm, MediaTek, and Samsung. X-FBAR RF packaging technology is industry-leading.
TFME (通富微电 - Amkor JV)
Joint venture between Tongfu Microelectronics and Amkor Technology combining Amkor's advanced packaging IP with China's cost advantages. Specializes in FC-BGA, SiP, and 2.5D packaging for high-performance computing and AI chip applications. Major AMD packaging partner.
Tongfu Microelectronics
One of China's oldest OSAT companies with comprehensive packaging portfolio covering wire bonding, flip chip, WLCSP, and advanced SiP. Strategic partner for domestic chip designers including HiSilicon and Loongson with focus on high-reliability automotive and industrial packaging.
Huatian Technology (华天科技)
Top-5 global OSAT with massive production scale across 8 manufacturing bases in China. Focuses on CIS image sensor packaging, fingerprint sensor packaging, and emerging SiPh (silicon photonics) packaging. Aggressively expanding advanced packaging capacity in Xi'an and Nanjing.
Wingtech Technology (闻泰科技)
Integrated semiconductor and ODM company with OSAT operations through Nexperia acquisition. Provides power semiconductor packaging, analog IC packaging, and SiP solutions. Unique vertically integrated model from chip design to packaging to end-product manufacturing.
Shinda (深科技 - Paytons)
Specializes in memory module packaging and DRAM/NAND flash assembly. Largest independent memory packaging provider in China with operations in Shenzhen, Chongqing, and Philippines. Expanding into HBM (high bandwidth memory) packaging for AI chip applications.
CIPM (中芯国际封装)
SMIC's packaging division developing proprietary 2.5D and 3D packaging technologies to complement front-end foundry services. Focuses on chiplet integration with silicon interposer and hybrid bonding. Strategic initiative to provide wafer-to-system solutions for domestic AI and GPU chip designers.
Side-by-Side Comparison
| Company | Revenue | Global Rank | Advanced Packaging | Key Technology | Major Customers |
|---|---|---|---|---|---|
| JCET | CNY 35B+ | #3 global | 2.5D/3D, chiplet, FO | X-FBAR, SiP | Qualcomm, MediaTek |
| TFME | CNY 25B+ | Amkor JV | 2.5D, FC-BGA | Amkor IP + China cost | AMD, domestic AI |
| Tongfu | CNY 15B+ | Top 10 | SiP, WLCSP | High-reliability | HiSilicon, Loongson |
| Huatian | CNY 15B+ | Top 5 | CIS, SiPh | Sensor packaging | Omnivision, local |
| Wingtech | CNY 50B+ | Nexperia | Power SiP | Vertical integration | Auto, mobile |
| Shinda | CNY 10B+ | Niche leader | Memory, HBM | Memory packaging | Memory module makers |
| CIPM (SMIC) | Pilot stage | Emerging | 2.5D/3D, chiplet | Hybrid bonding | Domestic AI/GPU |
Frequently Asked Questions
OSAT stands for Outsourced Semiconductor Assembly and Test. It refers to companies that provide chip packaging and testing services after wafers are fabricated by foundries. OSAT companies transform bare silicon wafers into finished, tested chip packages ready for PCB assembly. Packaging protects the die, enables electrical connections, and manages thermal dissipation.
JCET (长电科技) is China's largest OSAT company and ranks third globally behind ASE and Amkor. With CNY 35 billion in annual revenue, JCET leads in advanced packaging technologies including 2.5D/3D IC, fan-out wafer-level packaging, and chiplet integration, serving major customers like Qualcomm, MediaTek, and Samsung.
Advanced packaging refers to technologies beyond traditional wire bonding, including flip chip, fan-out, 2.5D/3D stacking, and chiplet integration. It matters because as Moore's Law slows, advanced packaging enables continued performance improvements by connecting multiple chiplets with high-bandwidth interconnects. China sees advanced packaging as a strategic alternative to EUV lithography dependence.
Taiwan's ASE is the global OSAT leader with 30 percent market share. China's JCET holds approximately 13 percent global share. While China lags in the most advanced 3D packaging, it is rapidly closing the gap through massive investment, talent acquisition, and strategic partnerships. China's cost advantage and growing domestic demand provide strong competitive positioning.
Chiplet technology breaks complex SoCs into smaller, reusable chiplets connected via high-speed interposers or hybrid bonding. Chinese OSAT companies like JCET and CIPM are developing chiplet integration platforms that allow domestic chip designers to combine multiple chips (compute, memory, I/O) into a single package, achieving performance comparable to monolithic chips made on advanced nodes.