Semiconductor specialty gases (C4F6, WF6)
Foosung
Korea’s only maker of semiconductor specialty gases (C4F6 for etch, WF6 for tungsten interconnect). FY2025 revenue ₩472B. Supplies Samsung and SK hynix; WF6 demand surges with high-stack 3D NAND. Diversifying into battery electrolyte (LiPF6).
093370.KS Updated Jun 20, 2026 1 AI consumers
FoosungFY2025 revenue ₩472B
▸ Money out형석·무기불소 원료 (비공개)○정제·충전 설비 (비공개)○
Financials & Segments
- Total revenue · FY2025 revenue ₩472B
- Customer concentration · Korea’s only C4F6/WF6 maker. Customers Samsung, SK hynix.
- Segments · Semiconductor gases · Battery materials · Refrigerants & fluorides
Revenue from
- Samsung Electronics High confidence· Revenue ₩471.6B · FY2025 · consolidated total revenue
Supplies specialty gases — C4F6 (etch) and WF6 (tungsten interconnect) — to Samsung (Korea’s only maker).Confirms KO HuffPost Korea Accessed Jun 20, 2026: "Foosung is Korea’s only C4F6/WF6 maker, supplying Samsung and SK."Confirms EN Abachy Accessed Jun 20, 2026: "Foosung supplies semiconductor C4F6 and WF6 specialty gases." - SK hynix High confidence
Supplies C4F6/WF6 specialty gases to SK hynix; WF6 demand surges with high-stack 3D NAND.Confirms KO HuffPost Korea Accessed Jun 20, 2026: "Foosung supplies specialty gases to Samsung and SK hynix."Confirms KO Today Energy Accessed Jun 20, 2026: "Foosung’s C4F6 earned semiconductor evaluation certification." - 이차전지·기타 Medium confidence
Supplies battery electrolyte (LiPF6), refrigerants and others.
Pays to
- 형석·무기불소 원료 (비공개) Low confidence
Buys fluorspar and inorganic-fluorine feedstock (suppliers undisclosed). - 정제·충전 설비 (비공개) Low confidence
Buys gas purification/filling equipment and cylinders (undisclosed).
Value-chain ripple (tiers 2–3)
Following node-to-node links up to 3 tiers; each firm is shown once, at its nearest tier.