China Imposes 99.2% Duty on Japanese Chemical for Chip Fabs
Beijing has imposed cash deposits of up to 99.2% on Japanese dichlorosilane, a gas used by chip fabs to deposit films inside logic and memory chips. Instead of using export controls, which are explicitly banned under WTO rules, China leveraged anti-dumping law to achieve the same result.
The Details:
- Effective Date: Tuesday, September 8, 2026
- Source: China’s Ministry of Commerce Announcement No. 37 of 2026
- Affected Suppliers: Shin-Etsu Chemical (99.2%), Denal Silane (80.8%), and other Japanese exporters (99.2%)
What’s the Big Deal?
Dichlorosilane, or DCS, is crucial for chemical vapor deposition, a process that lays down silicon and oxide films in logic and memory production. A lack of this gas would cripple any chip fab.
The Legal Angle:
This isn’t about export controls, which are public and easily tracked. It’s about anti-dumping duties, a WTO-approved mechanism that looks like normal trade defense but achieves the same restrictive effect.
Timing is Suspect:
The petition was filed by a Chinese producer in December 2025. Prime Minister Sanae Takaichi’s remarks about Japan’s potential role in Taiwan in November 2025 may have contributed to the timing of the application, though causation cannot be established.
In Conclusion: While cloaked as trade law, this move reflects China’s broader strategy of restricting crucial materials through various means, including anti-dumping duties, raising questions about global supply chains and potential retaliation.