The demand for dichlorosilane is growing rapidly, and my country’s electronic-grade products are highly dependent on foreign countries.

Dichlorosilane, also known as dichlorosilane and dichlorosilane, has a chemical formula of SiH2Cl2 and is abbreviated as DCS in English. Dichlorosilane appears as a colorless gas under normal temperature and pressure. It has a special smell, is toxic, corrosive, irritating, and extremely flammable. It can spontaneously ignite at 44°C, decompose when exposed to heat, and hydrolyze when exposed to water. It is hydrogen chloride gas or hydrochloric acid, soluble in organic solvents such as ether, benzene, carbon tetrachloride, etc. It can react with ethanol and acetone, and will react violently with halogens and oxidants.

The preparation methods of dichlorosilane mainly include: using silicon powder and hydrogen chloride as raw materials, reacting to obtain a crude product, and then purifying by distillation to obtain the finished product; using silane/monochlorosilane and hydrogen chloride as raw materials, reacting in the presence of aluminum trichloride. Obtained; using trichlorosilane as raw material, it is prepared by reduction method. Among them, the silicon powder hydrogen chloride method can prepare high-purity dichlorosilane and is the mainstream production process.

Dichlorosilane can be used as a silylating agent and raw material to synthesize organic silicon compounds. High-purity dichlorosilane can be used as a high-quality semiconductor silicon source material for chemical vapor deposition (CVD) processes and silicon epitaxial wafer growth processes. middle. In the semiconductor industry, dichlorosilane can be used as a reactive gas to generate silicon atoms and deposit the silicon atoms on the substrate to produce silicon epitaxial wafers. Dichlorosilane is an important silicon source material in the manufacturing process of semiconductors and large-scale integrated circuits, and its demand continues to grow with the development of the electronics industry.

According to the “In-depth Market Research and Investment Strategy Suggestions Report on Dichlorosilane Industry 2021-2025” released by the Industrial Research Center, in 2019 In 2019, the global dichlorosilane market size was approximately US$52.6 million, and is expected to grow to approximately US$97.3 million by 2025, with an average annual compound growth rate of 10.8%, showing a rapid upward trend; in 2019, China’s dichlorosilane market size was approximately US$97.3 million. is US$2.6 million and is expected to grow to approximately US$5.89 million by 2025, with an average annual compound growth rate of 14.6%. Benefiting from the gradual transfer of the global semiconductor industry to mainland China, the Chinese market has stronger demand for dichlorosilane.

In the global market, Japan is the largest producer of dichlorosilane. Its annual output of electronic-grade high-purity dichlorosilane accounts for about 80% of the total global output. It is in a monopoly position. Shin-Etsu Chemical and Taiyo Nippon Sanso are the As a leading manufacturer, Shin-Etsu Chemical has a high market share. Compared with Japan, my country’s dichlorosilane industry started late. The production capacity of electronic-grade high-purity dichlorosilane is weak and the demand is highly dependent on imports. However, the scale of my country’s semiconductor industry is huge, and dichlorosilane must achieve import substitution.

In November 2020, Tangshan Sanfu Electronic Materials Co., Ltd.’s annual output of 500 tons of electronic-grade dichlorosilane project was officially put into trial operation. In January 2021, the product was successfully trial-filled and the project process was successfully tested. In the future, my country’s electronic-grade dichlorosilane The localization rate of chlorosilanes is expected to continue to increase. Industry analysts said that at this stage, my country’s electronic grade high-purity dichlorosilane market is monopolized by Japan’s Shin-Etsu Chemical, and the quality of domestic products And the performance stability needs to reach the same level and be recognized by downstream customers before it can compete with it for market share.