Semiconductor Gas Tariffs
China Imposes Steep Provisional Anti-Dumping Deposits on Japanese Semiconductor Gas Imports
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Key Points
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Importers’ provisional deposits are calculated using the customs-assessed dutiable value, multiplied by the applicable deposit rate and then by one plus the import-stage value-added tax rate.
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Dichlorosilane is described as a colorless, flammable and toxic gas requiring purity above 99%, underscoring the specialized nature of the material involved.
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Stakeholders have 10 days from the announcement to submit written opinions to China’s investigating authority.
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Beyond logic and memory chips, dichlorosilane is also used in producing analog semiconductors, silicon-based precursors and polysilazanes.
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The measure is being viewed in some reporting as part of wider Chinese economic pressure on Japan; the investigation began around the same time Beijing tightened export controls on dual-use items to Japan following Prime Minister Sanae Takaichi’s remarks about a possible Taiwan contingency.
China has imposed provisional anti-dumping deposits of up to 99.2% on dichlorosilane, a critical specialty gas used in semiconductor manufacturing, imported from Japan, effective September 8. SCMP The move follows an eight-month investigation that found Japanese producers were dumping the material and causing material harm to Chinese chipmakers. Shin-Etsu Chemical and most other Japanese suppliers face the steepest 99.2% deposit rate, while Denal Silane faces 80.8%.
Importers must calculate deposits using the customs-assessed value multiplied by the applicable rate and then by one plus the import-stage value-added tax. China Daily Stakeholders have just 10 days from the announcement to submit written comments to China's investigating authority, which will complete its final review while these provisional measures remain in place.
A Specialty Chemical Critical to Chip Production
Dichlorosilane is a colorless, highly flammable and toxic gas that must exceed 99% purity for semiconductor use. Xinhua Beyond memory and logic chips, the chemical serves as a precursor in analog semiconductors, silicon-based compounds and polysilazanes. The specialized nature of the material — requiring extreme purity and careful handling — makes it essential for modern chip manufacturing worldwide.
China's Eight-Month Investigation Targets Japanese Suppliers
China's Ministry of Commerce launched the investigation in January and found preliminary evidence that Japanese producers were systematically dumping dichlorosilane into the Chinese market. BigGo Finance The investigation concluded that this dumping caused material injury to domestic Chinese manufacturers. China said it handled the case under Chinese law and World Trade Organization rules, and promised to make an objective final determination.
Steep Deposit Rates Hit Japanese Chemical Giants Hardest
The provisional deposit rates vary sharply by supplier. SCMP Shin-Etsu Chemical and most other Japanese producers face the maximum 99.2% deposit, while Denal Silane receives a lower 80.8% rate. These deposits function as a financial barrier, requiring importers to post cash equivalent to the deposit percentage before goods can clear customs, effectively restricting supply flow into China.
Part of Broader Economic Tensions With Japan
The anti-dumping measure comes amid rising economic friction between China and Japan. SCMP The investigation began around the same time Beijing tightened export controls on dual-use items to Japan following Prime Minister Sanae Takaichi's remarks about a possible Taiwan contingency. Some observers view the steep DCS deposits as part of a wider Chinese economic pressure campaign against Tokyo over geopolitical concerns.
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