# China Imposes Anti-Dumping Deposits of Up to 99.2 Percent on a Japanese Chipmaking Gas

Importers of Japanese dichlorosilane must post cash deposits from Tuesday, with Shin-Etsu Chemical facing the maximum rate and one supplier granted 80.8 percent.

- Published: 2026-09-08T05:13:34.188Z
- Canonical: https://polylog.news/2026-09-08/china-imposes-anti-dumping-deposits-of-up-to-99-2-percent-on
- Publisher: Polylog (Global desk)
- Section: tech
- Sources: [The Japan Times](https://www.japantimes.co.jp/business/2026/09/08/economy/china-japan-imports-anti-dumping/), [South China Morning Post](https://www.scmp.com/economy/china-economy/article/3366661/china-hits-critical-japanese-chipmaking-chemical-steep-anti-dumping-measures), [Global Times](https://www.globaltimes.cn/page/202609/1369988.shtml)

China's Ministry of Commerce issued a preliminary ruling that Japanese dichlorosilane has been sold below fair value and harmed Chinese producers, and it required importers to post cash deposits with customs [from Tuesday at rates between 80.8 and 99.2 percent](https://www.japantimes.co.jp/business/2026/09/08/economy/china-japan-imports-anti-dumping/). Dichlorosilane is a specialty gas used to deposit silicon films during chip fabrication, and it has few substitutes at the purity semiconductor plants require.

The South China Morning Post reports that [the ruling followed an eight-month investigation](https://www.scmp.com/economy/china-economy/article/3366661/china-hits-critical-japanese-chipmaking-chemical-steep-anti-dumping-measures) opened in January at the request of Chinese producers. Denal Silane, a Japanese maker of semiconductor specialty gases, received the lower 80.8 percent rate. Shin-Etsu Chemical, a major supplier of silicon wafers and electronic chemicals, faces the maximum. Global Times, the Chinese state-affiliated outlet, reported the same [preliminary finding of dumping and the September 8 start date for deposits](https://www.globaltimes.cn/page/202609/1369988.shtml).

Anti-dumping law provides a legal route to a result that also serves industrial policy. Deposits at these levels make Japanese supply uneconomic for Chinese fabrication plants, which have to buy domestically produced gas or pay a price that eliminates the difference. Chinese producers of the same chemical gain a protected home market in which to scale. That is the same sequence China has followed in solar cells, batteries and display panels, applied now to a chemical input.

## What this means

Japanese specialty-chemical suppliers lose access to the largest single market for semiconductor materials, and Shin-Etsu Chemical carries the most concentrated exposure. Chinese chip fabricators face a near-term cost increase and a supply constraint until domestic producers scale, which slows their output in the short run and reduces their dependence on Japanese supply in the long run. The measure also gives Beijing a demonstrated tool to use against other Japanese materials, since the same anti-dumping process applies to photoresists, wafers and polishing compounds.

## What to watch

- Whether Japan files a complaint at the World Trade Organization, which would test whether that dispute system still constrains this kind of measure.
- Chinese domestic production capacity for dichlorosilane, since the deposits only work as industrial policy if local supply can meet fabrication-grade purity requirements.
- Whether Beijing opens similar investigations into other Japanese semiconductor materials, which would show the measure is the start of a sequence rather than a single case.