CoWoS combines logic dies and high-bandwidth memory (HBM) stacks within a single package, which is how AI accelerators get the data bandwidth that demanding workloads require. Building these packages is only getting harder as chip designers cram in more compute and memory. Nvidia’s Blackwell already pairs two large GPU dies with eight HBM3E stacks, whereas the upcoming Rubin and Rubin Ultra are expected to push integration further, which will increase pressure on packaging and the supply chain that supports it.
Testing is turning into another bottleneck. Blackwell reportedly takes three to four times longer to test than Nvidia’s previous-generation Hopper, and Rubin could need as much as seven times longer. Extended test cycles keep equipment occupied for longer, which makes it harder to increase output as demand grows. GPUs are not the only products competing for capacity either, as server CPUs and custom ASICs also need advanced packaging, adding more strain to an already crowded supply chain.
Tools are also taking longer to arrive, as equipment lead times have reportedly stretched from three to six months to as long as eight months, making timely access to fab equipment increasingly important. As a result, TSMC has reportedly placed this year’s equipment orders at existing prices instead of negotiating discounts or extra features — a departure from its customary approach of using its purchasing power to secure better terms. Essentially, getting the tools on time now appears to matter more to the company than getting them cheaply.
The squeeze echoes a report from September, which said that TSMC’s projected semiconductor equipment requirements had almost doubled in six months as the company expanded production to meet AI demand. Cliff Hou, deputy co-COO at TSMC, said that by July the company’s expected equipment needs had reached 1.9 times its original estimate as AI demand accelerated. “Compared with the pattern 30 years ago, we have never seen the demand increase that much, that frequency of changes,” Hou said at the time.
TSMC fab equipment demand nearly doubles in six months
Key considerations
- Investor positioning can change fast
- Volatility remains possible near catalysts
- Macro rates and liquidity can dominate flows
Reference reading
- https://www.tomshardware.com/tech-industry/semiconductors/SPONSORED_LINK_URL
- https://www.tomshardware.com/tech-industry/semiconductors/tsmc-reportedly-weighs-20-percent-cowos-price-increase-as-nvidia-blackwell-and-rubin-chips-put-pressure-on-packaging-capacity-equipment-lead-times-stretch-to-eight-months#main
- https://www.tomshardware.com/membership
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Informational only. No financial advice. Do your own research.