Silicon Wafers
The polished single-crystal substrate every chip is built on
Silicon wafers are the ultra-pure monocrystalline substrates (300mm for leading-edge logic, plus emerging 450mm R&D) on which all transistors are fabricated. The market is a tight oligopoly dominated by Japan's Shin-Etsu and SUMCO, with Taiwan's GlobalWafers and Germany's Siltronic making up most of the rest. Demand for AI accelerators and HBM has tightened 300mm epi-wafer supply, and prime-grade capacity additions run 2-3 years behind, making wafers a structural bottleneck.
Top suppliers
Shin-Etsu, SUMCO, GlobalWafers, Siltronic, SK Siltron
Market structure
Top 5 control ~90% of 300mm supply
Leading diameter
300mm (450mm still pre-production)
2025-26 status
Epi/prime-grade tight on AI + HBM demand
How it fits the stack
Silicon Wafers with what it depends on (above) and what it feeds (below). The figure renders as a crawlable diagram and upgrades to an interactive 3D graph as it scrolls into view.
Silicon Wafers in the AI stack. Silicon Wafers with its immediate upstream dependencies (top) and downstream dependents (bottom) in the AI value chain. Hover a node in 3D, or read the full relationships below.
Graph data (text) — 12 entities, 12 relationships
- Silicon Wafers —manufactures→ GlobalWafers
- Silicon Wafers —manufactures→ Shin-Etsu Chemical
- Silicon Wafers —manufactures→ Siltronic
- Silicon Wafers —manufactures→ SK Siltron
- Silicon Wafers —manufactures→ SUMCO Corporation
- DRAM —depends on→ Silicon Wafers
- EUV Lithography (13.5nm) —uses→ Silicon Wafers
- High-Bandwidth Memory (HBM) —depends on→ Silicon Wafers
- Intel Foundry —supplies→ Silicon Wafers
- Samsung Foundry —supplies→ Silicon Wafers
- Samsung Foundry —depends on→ Silicon Wafers
- SK Hynix —supplies→ Silicon Wafers
Depends on ↑ · 5
Feeds ↓ · 10