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A Clod of Chinese Soil Chokes Two Japanese Giants

"Chinese Soil Chokes Japanese Giants" The production of a key electronic specialty gas, tungsten hexafluoride (WF6), vital for manufacturing AI chips, was halted by two leading Japanese producers—Kanto Denka and Central Glass. Their shutdown was not due to a technological failure but a sudden, critical shortage of a raw material they had long taken for granted: ultra-high-purity (6N-grade) tungsten powder, which is almost entirely sourced from China. Following a quiet Chinese export announcement in January 2026, tungsten powder shipments to Japan dropped to zero for months. Despite frantic efforts, Japanese companies found no viable alternative; imported powder was three times more expensive and lacked the required purity. Their existing stockpiles were exhausted by mid-2026. WF6 is essential for depositing tungsten into the microscopic contact holes of High Bandwidth Memory (HBM) chips, which are crucial for advanced processors like those from Nvidia. While Japanese firms had mastered producing ultra-pure WF6 gas, their entire supply chain relied on China's 6N tungsten powder—a dependency now revealed as a fatal vulnerability. China's dominance in this "soil" results from decades of painstaking R&D by companies like Xiamen Tungsten and China Tungsten & Hightech. They overcame immense technical hurdles, such as separating chemically similar molybdenum from tungsten, to achieve mass production of the world's purest tungsten powder. With their primary suppliers gone, Kanto Denka and Central Glass announced a permanent halt to WF6 production starting July 1, 2026. This immediately created a supply crisis for major semiconductor manufacturers like Samsung and SK Hynix, forcing them to urgently seek and certify new Chinese suppliers for WF6 itself. The reversal marks a dramatic shift: China has moved from exporting low-value raw materials to controlling the high-purity foundation of a critical global tech supply chain, upending a long-established industrial hierarchy.

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