Chinese OSAT Firms Expected to Capture 13% Market Share in Cloud AI Accelerator Packaging by 2026
nashnova research
DIGITIMES forecasts Chinese OSAT firms will jump from 3.9% to 13% of global cloud AI accelerator packaging in a single year — vaulting China's advanced packaging from a fringe player to the world's third-largest platform.
Where does the 13% come from?
The core driver: Huawei, Cambricon, and Alibaba are moving home-grown ASIC accelerators — chips custom-built for AI workloads — into mass production.
Those chips need packaging, and the orders are flowing to domestic OSATs: JCET, TFME, and SJ Semiconductor (SJSemi).
This means → the leap is not a sudden tech breakthrough in packaging itself; it is domestic AI chip volume feeding the domestic packaging line.
Why is packaging, specifically, accelerating?
Export controls block China from EUV lithography tools — the machines that etch the most advanced chip circuits — cutting off the leading-edge manufacturing path.
Advanced packaging has become the primary detour: of China's 43 OSAT firms, nearly half have expanded into advanced packaging, scaling up 2.5D and 3D capacity.
In plain terms = if you cannot build the smallest transistors, you take the chips you can build and combine them in smarter ways — packaging fills the gap that manufacturing cannot.
How much capital is going in?
JCET, TFME, Tianshui Huatian, and Chipbond together announced RMB 27 billion (~US$4 billion) in new capex in H1 2026 alone — all earmarked for AI-oriented advanced packaging.
JCET is building a new advanced-packaging fab in Shanghai Lingang, with Phase 1 completion targeted for H2 2028, backed by a RMB 6.5 billion private placement.
TFME has launched Phase 2 of its Suzhou JV fab, adding FCBGA lines — a high-end packaging format for server CPUs and AI processors — dedicated to next-generation AI chips.
Tianshui Huatian set up a subsidiary focused on 2.5D and 3D tech, planning to install over 2,700 process tools at its Nanjing Phase 2 site; Chipbond's Phase 3 advanced-packaging project spans a 96-month build cycle.
Will TSMC's dominance be shaken?
TSMC's CoWoS-L — a packaging technology that tiles multiple chiplets onto a single large substrate — serves Nvidia GPUs, Google TPUs, and Meta MTIA. Its share is projected to hit 54.6% by 2027; the lead is secure.
CoWoS-S, however, is losing ground as customers migrate to CoWoS-L for larger packages. Its share is set to fall from 33.9% in 2025 to 16.1% by 2027.
This means → China's OSATs are not competing with CoWoS-L; they are challenging the shrinking CoWoS-R for the third-place slot.
How fast is the landscape shifting?
From 3.9% to 13% in one year — a pace that outstrips prior market expectations.
This reflects two forces compounding: domestic AI chip volume creates the order base, while export controls funnel resources specifically toward packaging.
In plain terms = China's semiconductor breakout is pivoting from "build smaller transistors" to "package existing chips more intelligently."
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