Advanced Packaging Seen as Next Chip Bottleneck
Analysts are highlighting advanced packaging technologies like chiplets, HBM, and 2.5D/3D stacking as the next major bottleneck in semiconductor manufacturing. This shifts constraints downstream from wafer fabrication to the assembly and packaging stages. Another analysis notes that packaging is evolving to create high-bandwidth networks within the chip itself, with bottlenecks emerging at the die edge.
- Advanced packaging technologies like TSMC's Chip-on-Wafer-on-Substrate (CoWoS) are critical for integrating High-Bandwidth Memory (HBM) with GPUs, but capacity is oversubscribed through at least mid-2026, creating a significant bottleneck for AI accelerator production. - The global chiplet market was valued at $9.06 billion in 2024 and is projected to reach over $223 billion by 2033, driven by the need for more scalable and cost-effective alternatives to traditional monolithic chip designs. - Foundries are making massive investments to increase capacity; TSMC is investing an additional $100 billion in its Arizona facility for new fabs and two advanced packaging plants, aiming to double its overall advanced packaging capacity by 2026. - Intel is positioning its Foveros (3D) and EMIB (2.5D) packaging technologies as alternatives to TSMC's CoWoS, attracting interest from major players like Apple, NVIDIA, and Qualcomm who are looking to diversify their supply chains. - Samsung is also a key competitor with its 2.5D I-Cube and 3D SAINT packaging technologies, offering a potential one-stop-shop solution by combining its foundry, memory (HBM), and advanced packaging services. - A secondary bottleneck has emerged in the supply of HBM itself, with major suppliers like SK Hynix and Micron reportedly sold out for most of 2025, directly impacting the assembly of GPUs which cannot be built without it. - The shift to advanced packaging is a direct response to the slowing of Moore's Law, with performance gains now coming from heterogeneous integration—combining multiple chiplets—rather than just shrinking transistors. - This packaging crunch has extended lead times and increased costs, with a single defect in a multi-die package potentially compromising the entire high-value component, making yield management a critical challenge.
