chemical · input
Higher-order silane used for low-temperature epitaxial silicon deposition in advanced DRAM and 3D NAND manufacturing. Disilane deposits silicon at ~500°C vs ~800°C for monosilane — enabling deposition on thermally sensitive structures in stacked memory. Used in selective epitaxial growth (SEG) for source/drain regions in FinFETs. Niche but critical: no qualified substitute for specific DRAM node transitions.
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Source countries
8
Companies
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Goods affected
0
Claims on record
Where it comes from
Share of global supply, by country.
| Country | Share of supply |
|---|---|
| JPJapan | 28% |
| KRSouth Korea | 22% |
| USUnited States | 15% |
| TWTaiwan | 12% |
| CNChina | 10% |
| FRFrance | 8% |
Who makes it
8 companies produce disilane (si₂h₆) — low-temperature cvd.
World's largest NF₃ AND one of top WF₆ producers; subsidiary of SK Group. Revenue ~₩1.2T (2024). Operates Gyeongbuk (Yeongju) facility for both NF₃ and WF₆ using shared HF/F₂ feedstock infrastructure. SK Materials is the only company in the world that is simultaneously a top-3 producer of both NF₃ (chamber cleaning) and WF₆ (CVD tungsten) — making it a dual critical chokepoint for advanced semiconductor manufacturing.
World's largest industrial gas company; provides gas odorant distribution and blending services globally including ethyl mercaptan. Air Liquide distributes and markets mercaptan gas odorants to LPG and natural gas utilities. Also a leading producer of industrial gases (oxygen, nitrogen, hydrogen, noble gases) for healthcare, industry, and energy. Air Liquide is listed among the top ethyl mercaptan market participants; primarily as a specialty gas blender/distributor rather than a primary mercaptan chemical producer.
Second largest global SiH4 producer; largest global WF6 producer; 1 trillion won capacity doubling investment; building US plant with Showa Denko for North American chipmakers
Japanese specialty chemicals; key disilane producer for semiconductor CVD; high-purity Si2H6 for NAND flash and logic ICs; also building US silane facility JV with SK Materials
Japanese chemical conglomerate (TYO: 4183, HQ Tokyo); recognized as the quality leader for ultra-high-purity electronic grade IPA for semiconductor applications, achieving parts-per-billion impurity levels. In Q2 2024, Mitsui Chemicals introduced a bio-based IPA derived from renewable acetone with 25,000 MT/year initial capacity — part of Japan's push toward bio-based chemicals. Mitsui is one of the world's leading specialty chemical companies with deep ties to the Mitsui Group keiretsu (same group as Mitsui & Co. trading, Mitsui Fudosan real estate, etc.). Mitsui Chemicals' IPA is particularly important for Japanese and Taiwanese semiconductor fabs. The company that dominates bio-based IPA is also part of the same industrial group that owns one of Japan's largest steel mills (Nippon Steel was historically Mitsui-linked).
Taiwan-based disilane supplier for regional semiconductor cluster (TSMC, UMC); regional supply chain expertise; focus on Taiwan and Asia-Pacific fabs
Norwegian polysilicon producer with US manufacturing history. Operates Butte, MT facility (FBR — Fluidized Bed Reactor polysilicon; 1,500 MT/yr granular polysilicon capacity). Previously operated Moses Lake, WA plant (18,000 MT/yr) which was idled in 2019 due to Chinese trade war tariffs blocking exports to China. Moses Lake restart discussions ongoing; DOE loan guarantees under consideration. REC Silicon is the primary non-Chinese Western polysilicon producer with US domestic capacity.
Korean specialty gas producer; disilane and other CVD precursors; serves Samsung, SK Hynix memory fabs in South Korea
