Key Findings
According to TrendForce’s latest report, Taiwan Semiconductor Manufacturing Company (TSMC) is reportedly expanding the outsourcing of certain critical front-end processes for its CoWoS (Chip-on-Wafer-on-Substrate) advanced packaging technology to Outsourced Semiconductor Assembly and Test (OSAT) service providers. This strategic move aims to rapidly increase the supply capacity of AI accelerators and mitigate market bottlenecks amidst surging demand for NVIDIA’s Application-Specific Integrated Circuits (ASICs).
Technical Details
- CoWoS technology is a 2.5D packaging solution that integrates multiple logic chips and High Bandwidth Memory (HBM) onto a silicon interposer, which is then mounted onto a substrate. It is essential for meeting the high-performance requirements of AI/HPC chips.
- The processes being outsourced to OSATs are speculated to be some of the complex ‘front-end’ steps of CoWoS, such as silicon interposer manufacturing, Redistribution Layer (RDL) formation, and micro-bump formation. These steps demand extremely high precision and technical expertise.
- This expanded outsourcing will enable TSMC to concentrate its production resources on higher-value, more advanced processes, while OSATs gain an opportunity to enhance their presence in the advanced packaging sector.
Background & Context
NVIDIA’s Graphics Processing Units (GPUs) have become the de facto standard for AI model training and inference, with demand growing at a pace far exceeding forecasts. Advanced packaging like CoWoS is indispensable for maximizing the performance of AI accelerators, but its manufacturing process is complex and time-consuming, creating a bottleneck across the entire supply chain. TSMC’s expansion of outsourcing to OSATs represents a pragmatic solution to alleviate this bottleneck and enable faster market supply.
Strategic Significance & Outlook
This strategic move by TSMC is likely to further elevate the importance of OSATs in the advanced packaging market and potentially trigger a restructuring of the industry’s supply chain. Major OSAT players, such as ASE Technology Holding and Amkor Technology, have been expanding their CoWoS-related production capacities, and this increased outsourcing from TSMC will further accelerate their growth. This is expected to stabilize the supply of AI semiconductors and foster the further proliferation and development of AI technologies.
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