Packaging and advanced packaging (CoWoS)

Packaging and advanced packaging (CoWoS) integrates fabricated dies with substrates, interposers, memory, power delivery and cooling. Wafer fabrication creates a die; packaging connects it to other components and the system. CoWoS is TSMC's chip-on-wafer-on-substrate family, not a synonym for every advanced package.

For high-performance compute, packaging determines how logic dies communicate with High-bandwidth memory (HBM). Silicon interposers, fine-pitch bonding, substrates, assembly equipment and testing form distinct control points. A completed logic wafer is not a usable accelerator until these stages are qualified. AI accelerators and GPUs (Nvidia H100, A100, and the export-tuned H20) therefore depend on both wafer supply and packaging capacity.

Capacity claims require care. Announced lines are not installed tools; installed tools are not qualified production; qualified output still depends on yield and customer mix. TSMC annual reports and company technical material establish architecture and dated investment, while the United States Department of Commerce's January 2025 final awards describe public support for domestic advanced packaging. None establishes a timeless global market share.

The December 2024 United States controls on specified advanced memory and semiconductor production items were legal restrictions administered under the Export Administration Regulations. Their scope is separate from the physical function of a package. Part 742 supplies licensing context, not evidence that a particular shipment breached the rules.

Substitution is limited by performance, design and qualification time. Alternative package architectures or suppliers may exist, but customers must redesign interfaces and validate thermal, electrical and reliability performance. This makes advanced packaging a resilience issue within Semiconductor foundry capacity (TSMC, Samsung, GlobalFoundries) and Advanced logic semiconductor manufacturing, while strategic intent attaches only to an evidenced subsidy, restriction or denial.

See also Economic statecraft.

Sources

• NIST, final advanced-packaging awards, January 2025
• TSMC, CoWoS technology
• TSMC annual reports
• US Export Administration Regulations, part 742
• BIS, semiconductor manufacturing and HBM controls, 2 December 2024