Tongfu Microelectronics Co., Ltd.
Provide advanced chip packaging and testing services, focusing on Chiplet 2.5D/3D packaging technology
One of the few domestic manufacturers capable of large-scale Chiplet packaging mass production, deeply tied to top customers such as AMD, with processes covering FCBGA, 2.5D TSV, and 3D stacking
Tongfu Microelectronics Co., Ltd. (referred to as "TFME", stock code: 002156.SZ) was founded in 1997 and listed on the Shenzhen Stock Exchange in 2007, with its headquarters in Nantong, Jiangsu Province. The company is a leading integrated circuit (IC) packaging and testing enterprise in China, with its core business focused on advanced packaging (especially Chiplet integration technology). Against the backdrop of surging AI computing power demand, Tongfu Microelectronics has become a scarce player in China's back-end packaging segment for high-performance computing chips (such as GPUs, CPUs, and AI accelerators), leveraging its 2.5D/3D packaging capabilities. The company is deeply tied to global CPU giant AMD and has been continuously onboarding major domestic AI chip customers.
This business line covers FCBGA (Flip-Chip Ball Grid Array), 2.5D interposer packaging, and 3D stacked packaging for high-performance computing chips. Key customers include AMD (accounting for ~50% of orders), NVIDIA (for select AI chips), HiSilicon, and domestic AI startups. In 2023, advanced packaging business revenue reached approximately RMB 15.5 billion, with a gross margin of about 18%. The technology node covers packaging for 7nm/5nm chips and supports multi-chiplet integration via TSV (Through-Silicon Via), enabling higher bandwidth and optimized power consumption.
Includes conventional packaging such as QFP, QFN, and BGA, as well as finished product testing services. This segment has a lower gross margin (~12%) but provides a foundation for capacity utilization. Customers span consumer electronics, automotive electronics, and other sectors.
| Product Line | Revenue Share | Key Customers | Gross Margin |
|---|---|---|---|
| Chiplet Advanced Packaging | ~70% | AMD, NVIDIA, HiSilicon | ~18% |
| Conventional Packaging & Testing | ~30% | Consumer electronics, automotive chip customers | ~12% |
Technical Moat
Moat 1: Large-Scale Chiplet Mass Production Capability
Tongfu Microelectronics is one of the few OSAT companies in China with mass production capabilities for 2.5D TSV (silicon interposer) and 3D IC packaging. Its Suzhou plant has established a 2.5D packaging capacity exceeding 100,000 wafers per month, enabling high-density interconnection between multiple chiplets (with line width/spacing reaching micron-level) and achieving a yield rate above 95%. This capability directly serves AMD's server CPUs (such as the EPYC 9004 series) and AI accelerators, making it the only packaging solution in China that can compete as an alternative to TSMC's CoWoS (for non-TSMC foundry chips).
Moat 2: Deeply Embedded Strategic Customer Ecosystem
In 2015, Tongfu Microelectronics established an exclusive cooperative relationship with AMD by acquiring AMD's Suzhou and Penang packaging and testing facilities. AMD contributes approximately 50% of the company's revenue, and the two parties are jointly developing next-generation Chiplet packaging processes (such as 3D V-Cache). This deep binding not only secures stable orders but also keeps Tongfu Microelectronics at the forefront of Chiplet packaging technology evolution. Meanwhile, the company is expanding its AI chip customer base to include NVIDIA, Huawei, Biren Technology, and others, further consolidating its moat.
| Dimension | Data |
|---|---|
| Global OSAT Market Share | ~2.8% (2023, ranked 7th in the industry) |
| Domestic Advanced Packaging (Chiplet) Share | ~15%, top 3 |
| Key Competitors | JCET (Global #3, advanced packaging ~50%), Huatian Technology (Global #6), TSMC (CoWoS monopoly) |
| Downstream Customers | AMD (~50% of revenue), NVIDIA (small volume), HiSilicon, domestic GPU startups |
Competitive Landscape Analysis: In the Chiplet packaging space, TSMC holds absolute dominance in high-end AI chips (e.g., NVIDIA H100/B200) through its CoWoS technology, but capacity bottlenecks have led to order spillover. TFME (Tongfu Microelectronics) is one of the few domestic manufacturers capable of undertaking such orders, with irreplaceable advantages especially in non-TSMC foundry chips (such as AMD chips and 7nm chips from domestic design companies). JCET also has a footprint in 2.5D packaging, but TFME's joint development with AMD gives it higher technological maturity.
Financials & Growth
| Metric | Data (FY2023 Annual Report) |
|---|---|
| Revenue | RMB 22.27 billion |
| Gross Margin | 16.2% |
| Net Margin | 3.1% |
| R&D Expense Ratio | 7.8% |
| Core Growth Logic | ① Explosive AI computing chip demand, high unit price of Chiplet packaging ($50–$200 per unit); ② Capacity expansion (30% increase in 2.5D packaging capacity planned for 2024); ③ Steady AMD revenue growth (data center CPU + AI GPU) |
Growth Driver Analysis:
- Volume & Price Rising Together: The unit price of AI chip packaging is 5–10x that of traditional packaging. With AMD MI300 series and Huawei Ascend series ramping up, the company's advanced packaging revenue share will rise from 70% to over 80%.
- Domestic Substitution: Amid the US-China tech decoupling, domestic AI chip companies (e.g., Cambricon, Biren Technology) are seeking local packaging alternatives. TFME is one of the preferred suppliers.
- Capacity Expansion Payoff: By the end of 2024, the Suzhou plant's monthly capacity will reach 150,000 wafers (2.5D), expected to bring approximately 30% revenue growth.
Major Risks:
- Customer Concentration Risk: AMD contributes approximately 50% of revenue. If AMD's product iterations fail or it shifts orders elsewhere, it would cause a significant impact.
- Technology Iteration Risk: New architectures such as TSMC's CoWoS-L and Intel's EMIB may render Tongfu Microelectronics' existing 2.5D solutions outdated, requiring sustained high R&D investment to keep pace.
- Capacity Expansion and Gross Margin Dilution: Significant capacity expansion may lead to increased depreciation, while intensifying competition could suppress packaging unit prices, further pressuring gross margins (current 16% already below JCET's 20%).
Core Investment Thesis / Industrial Value Summary:
As the most pure-play target in the domestic Chiplet advanced packaging track, Tongfu Microelectronics, leveraging its deep collaboration with AMD and mass-production capabilities, is poised to benefit continuously from the dual drivers of the AI computing power surge and accelerated domestic substitution. Despite risks of customer concentration and technology catch-up, its scarcity and high elasticity endow it with unique value in the AI industry chain. In the long term, as Chiplet packaging evolves from point-specific demand to an industry trend, Tongfu Microelectronics is expected to upgrade from "working for AMD" to becoming a "domestic AI chip packaging platform."