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SUMCO SUPPLY CHAIN TRACE

MATERIALS🇯🇵 Japan · 3436 · TSEChokepoint

SUMCO Corporation is Japan's second-largest silicon wafer manufacturer and, alongside Shin-Etsu Chemical, forms a duopoly that controls roughly 55% of global 300mm wafer supply. Because virtually every advanced logic and memory chip requires a silicon wafer as its starting substrate, any disruption to SUMCO's output propagates immediately to TSMC, Samsung Foundry, SK Hynix, and every other downstream fab.

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Graphite (CN)

Dominant graphite producer for semiconductor crucibles, furnace components, and SiC substrates

Chokepoint🇨🇳
RAW MATERIALSsupplies graphite crucibles for Si crystal growth to

High-Purity Quartz (US)

Unique ultra-pure quartz deposits for fused-silica optics and quartz process chambers

Chokepoint🇺🇸
RAW MATERIALSsupplies quartz crucibles for crystal growth to

↓ all supply to SUMCO ↓

SUMCO

#2 global silicon wafer supplier; duopoly with Shin-Etsu controls ~55% of world supply

UPSTREAM — SUPPLIERS ↑ · DOWNSTREAM — CUSTOMERS ↓
Chokepoint~25% silicon wafers
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↓ SUMCO supplies to ↓

TSMC

World's largest contract chip manufacturer

Chokepoint🇹🇼
FOUNDRIESsupplies silicon wafers to

Samsung Foundry

Second-largest advanced foundry, competing at 3nm

🇰🇷
FOUNDRIESsupplies silicon wafers to

Intel Foundry

US-based foundry ramping Intel 18A and 3nm nodes

🇺🇸
FOUNDRIESsupplies silicon wafers to

Rapidus

Japan's government-backed foundry targeting 2nm by 2027

🇯🇵
FOUNDRIESsupplies silicon wafers to

SMIC

China's largest foundry; capped at 14nm without EUV access; Entity Listed 2020

🇨🇳
FOUNDRIESsupplies silicon wafers to

YMTC

China's largest 3D NAND maker; Entity Listed Dec 2022, primarily serves domestic market

🇨🇳
MEMORY (HBM)supplies silicon wafers to

CXMT

China's leading DRAM maker, targeting DDR4/DDR5 at mature nodes without EUV

🇨🇳
MEMORY (HBM)supplies silicon wafers to

SK Hynix

Leading HBM3/HBM3E supplier for AI accelerators

Chokepoint🇰🇷
MEMORY (HBM)supplies silicon wafers to

Samsung Memory

World's largest DRAM and NAND supplier, ramping HBM3

🇰🇷
MEMORY (HBM)supplies silicon wafers to

Micron

Only US-based DRAM and HBM maker

🇺🇸
MEMORY (HBM)supplies silicon wafers to

GlobalFoundries

US-headquartered mature-node foundry (14nm/22FDX) specializing in RF, defense, and automotive chips; key Western alternative to TSMC for non-advanced applications

🇺🇸
FOUNDRIESsupplies silicon wafers to

UMC

Taiwan-based mature-node foundry (28nm–40nm) with ~6% global revenue share; key supplier for analog, mixed-signal, and display driver chips

🇹🇼
FOUNDRIESsupplies silicon wafers to

DOWNSTREAM — CUSTOMERS

About this company

QWhat is SUMCO's role in the AI chip supply chain?

#2 global silicon wafer supplier; duopoly with Shin-Etsu controls ~55% of world supply

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