WF6 Prices Surge as Japanese Chemical Giants Halt Production Amid China Tungsten Export Slump
Tungsten hexafluoride (WF6), a critical gas used to manufacture advanced semiconductor chips, faces a severe supply squeeze as major chemical producers in Japan halt manufacturing operations amid a sharp downturn in China’s raw tungsten exports. The disruption threatens to constrain production at leading chip foundries serving the artificial intelligence boom, highlighting a growing bottleneck in the materials supply chain that underpins the global semiconductor industry.
China dominates the raw supply of tungsten, controlling approximately 80% of global mining, refining, and powder processing capacity. However, year-to-date tungsten exports have dropped by roughly 50%, with imports to Japan falling to zero since February after manufacturers depleting five months of stockpiles. Japan hosts key WF6 suppliers that ship the chemical to Samsung, SK Hynix, and TSMC, which account for 80% of their WF6 sourcing from the country. With two major Japanese producers, Kanto Denka and Central Glass, set to cease all WF6 production on July 1, pricing for the gas has surged 151% to 232% depending on the market metric. Because qualifying a new chemical supplier takes 12 to 18 months and expanding manufacturing capacity requires two to three years, chipmakers face immediate challenges replacing the lost tungsten material, which is essential for filling micro-vias and contact plugs in next-generation processors.
From the sources (7 posts)
@gaurabSamsung, SK Hynix, and TSMC source 80% of their WF6 from Japan. Two Japanese companies produce 25% of the world's tungsten hexafluoride. Both Kanto Denka and Central Glass are stopping all WF6 production on July 1. We manufacture chemicals.
@semianalysis_The elevated pricing is also showing up in the pricing of WF₆ Korean Imports which is up +151% YTD. (5/6)
@semianalysis_The broader takeaway: as semiconductor complexity and AI demand increase, the bottlenecks may not just be found in chips or equipment, but in the critical materials that sit at the foundation of the entire supply chain. (6/6)
@semianalysis_What’s interesting is that supply appears increasingly constrained. High-purity tungsten metal powder is the primary raw material used to manufacture WF₆ (tungsten hexafluoride, the gas used in CVD). The raw supply chain is overwhelmingly d
@semianalysis_In particular, Japan - which hosts key WF₆ suppliers SK Materials, Shin-Etsu Chemical and others – is seeing skyrocketing pricing and meaningful decreases in Tungsten raw material imports, making it all but impossible for them to continue m
@semianalysis_One of the most underappreciated ways to play the AI semiconductor buildout may be through materials rather than chips themselves. As the industry races to produce more advanced semiconductors, demand isn’t just rising for GPUs and wafer f
@semianalysis_Tungsten is a great example. It is one of the most critical materials in semiconductor fabrication, prized for its high-temperature stability and resistance to electrical wear. Fabs rely on CVD to fill the deep, high-aspect-ratio vertical