Market overview

Hexachlorodisilane (HCDS, CAS 13465-77-5) is a silicon precursor for low-temperature ALD and CVD of silicon nitride and oxide in advanced logic and 3D NAND. Its use grows as chips add layers and need conformal films at lower temperatures.

The question this report answers
How much HCDS will 3D NAND and advanced logic need, and who can supply ultra-high purity grades?

Market Krystal preliminary estimate (2025)
Fact.MR: USD 175.9 mn (2024). We use USD 170-200 mn for 2025. Confidence grade B: one published estimate, checked against volumes or prices.

Market dynamics
– Demand: ALD nitride and oxide in memory and logic
– Supply: Japanese and Korean precursor makers
– Price and margin: purity premium
– Regulation and policy: limited

Key figures at a glance (third-party, cited)
– HCDS market: USD 175.9 mn (2024) to USD 284.8 mn by 2035 at 4.5% CAGR (the same source also states 5%) (Fact.MR)
– Named suppliers: Air Liquide, DNF, Evonik, Toagosei, UP Chemical, Wonik Materials, Entegris (Fact.MR)

Recent developments among key stakeholders
– No company-specific announcement was found for 2025-2026; the report tracks precursor capacity in Korea and Japan

What this means for the market
Growth follows advanced memory; purity and qualification protect incumbents.

How published estimates compare
Fact.MR gives two different CAGRs. Market Krystal ties demand to 3D NAND layer counts and ALD nitride steps.

Strategic scenarios to 2047
– Base: chip output keeps growing with AI, memory and logic; fabs spread across the US, Japan, Europe and India, and electronic gases and precursors grow with wafer starts and layer counts.
– Constrained supply: export controls on feedstocks (tungsten, fluorspar, rare gases) and producer exits split supply into blocs and create scarcity pricing.
– Technology transition: new deposition chemistries, molybdenum or ruthenium in place of tungsten, and lower-GWP cleaning gases change which materials fabs buy.
The swing factor for Hexachlorodisilane (HCDS) is 3D NAND layer counts. Signposts: memory capex, Chinese export-control lists, fab start-ups outside Asia, metallisation roadmaps.

What this report delivers
Annual volume (tonnes) and value (USD) for 2026-2035, segmented by grade: ultra-high purity, standard; application: ALD/CVD silicon nitride, silicon oxide, epitaxy; region: Korea, Taiwan, Japan, China, US. Each segment is backed by a producer capacity table, price benchmarks for 2020-2025 by grade and region, trade-flow analysis and a supplier risk map. Companies assessed include Toagosei, Evonik, DNF, UP Chemical, Air Liquide, Wonik Materials. The 2036-2047 outlook uses three explicit scenarios (base, constrained supply and technology transition) rather than a single extrapolated curve.

Who uses this report
Fab procurement, specialty-gas and precursor producers, semiconductor materials investors.

Why our approach is evidence-based
Most CAS-level market listings publish a single number with no audit trail, and we regularly find figures that contradict their own growth rates or exceed the size of the market they sit inside. Market Krystal works the other way round. We start from physical evidence: plant capacities, production and trade data, company disclosures, regulatory texts and price records. We build volume and price separately and only then compute value. Every third-party figure is cited, every Market Krystal estimate is labelled with its method and a confidence grade, and conflicts between sources are shown rather than hidden. Confidence grades: A = two or more independent sources agree, or government or company data; B = one published estimate checked against volumes or prices; C = no reliable published figure, so the range is built from stated assumptions and narrowed in the full report.

Methodology and delivery
Prepared by the Market Krystal Chemicals Research Team. Each report is built around the buyer’s question: after purchase, a short scope confirmation fixes the priority regions, companies and applications, and the report is delivered within 5-7 business days with the Excel model behind every estimate, so buyers can audit and change the assumptions.

The purchased delivery includes the PDF report, Excel datasets and customization around the buyer’s priority region, company set, application or commercial question.

What this research answers

The study connects production routes, named suppliers, applications, regional demand, trade, pricing drivers and commercial opportunities for this CAS number. Detailed estimates and company analysis remain inside the purchased report.