HBM4 volume shipping; CoWoS lead times stretch past 12 months
Silicon Analysts Weekly for the week of 2026-08-18 to 2026-08-25: HBM4 volume shipping; CoWoS lead times stretch past 12 months. A sourced, provenance-marked briefing on AI-chip supply-chain and pricing movements — HBM spot prices, wafer pricing, foundry and CoWoS capacity, per-chip bill-of-materials cost, and HBM qualification status — derived from public data and human-reviewed. Part of the Silicon Analysts semiconductor data layer.
The take
All three major HBM vendors are now in volume production on HBM4 for NVIDIA, so the qualification bottleneck has shifted fully to packaging — CoWoS lead times now exceed 12 months. Readers tracking Blackwell pricing should note that CoWoS allocation is the binding constraint on system availability, not HBM supply.
TSMC SoIC 6µm ramp — 10,000 to 50,000 wafers per month (source)
TSMC N3 wafer price (high) — +35.0% WoW
TSMC N3 wafer price (low) — −10.0% WoW
Supply-chain & pricing signals
SK Hynix Publishes CPO Technology Roadmap in Nature Electronics — SK Hynix's publication of co-packaged optics (CPO) technology roadmap signals a strategic pivot from memory-centric to systems-level AI infrastructure. This legitimizes CPO as the next-generation interconnect standard, creating new demand for optical packaging and enabling manufacturers to differentiate beyond HBM commodity competition. (SK Hynix Newsroom) · _In our data:_ SK Hynix — 14 developments tracked this quarter · SK Hynix storyline · HBM price by generation · HBM market share by vendor
Renaissance Technologies cuts Micron stake by $486M in Q2 2026 — Institutional investor reduction of Micron position signals caution on memory sector fundamentals and competitive pressures. Large stake reduction may indicate diminished confidence in cycle recovery magnitude. (Centre Daily Times (via 13F filing)) · _In our data:_ Micron — 3 developments tracked this quarter · Micron storyline
Nvidia Q2 FY2027 revenue expected $93-95B; Blackwell ramp validates demand — Consensus guidance of $93-95B revenue (67-100% YoY growth) on August 26 earnings confirms sustained AI accelerator demand cycle. Blackwell architecture adoption strength indicates competitive moat persists vs. AMD/others. (Intellectia / Ad-hoc-news) · _In our data:_ NVIDIA — 11 developments tracked this quarter · NVIDIA storyline
HBM watch
SK Hynix × NVIDIA (HBM3E): now Volume shipping — Jensen Huang confirmed all three memory suppliers passed qualification and entered production. (source · timeline)
SK Hynix × NVIDIA (HBM4): In qualification →Volume shipping — Huang stated at Gimpo Airport on June 5 that all three major memory makers passed qualification and are mass producing competitively. (source · timeline)
This week's analysis
When the Supply Chain Is the Weapon: CXMT, Supermicro, and the New Anatomy of Semiconductor IP Theft — Two enforcement actions — a former Samsung engineer jailed for selling DRAM secrets to China's CXMT, and a Supermicro co-founder accused of smuggling NVIDIA chips — expose how memory IP theft and hardware diversion have become systematic tools of competitive strategy. This analysis examines the mechanisms, the economic stakes, and the vendor-qualification reforms procurement teams need now.
We Gave Our Data to Two AI Analysts. Both Misread the Same Number. — A postmortem on AI-consumed market data: two frontier-model research agents audited our semiconductor dataset from a spreadsheet export, both misread a BOM as a price, and neither caught the one real error — a restatement our own feed had published as a market move. Here is what broke, and what we changed so it cannot happen again.
mi325x packaging_cost — was 500 → now 1300 (Model restatement, not market movement: packaging cost was below the published floor of both constituent technologies (corrected in the cost)
mi325x est_mfg_cost — was 5950 → now 6750 (Moved with the packaging restatement (500 -> 1300); logic, HBM, and test/assembly unchanged. A basis change of the cost model reaching the D)
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