The raw materials for producing polysilicon mainly include silicon ore, hydrochloric acid, metallurgical grade industrial silicon, hydrogen, hydrogen chloride, industrial silicon powder, carbon and quartz ore.
Silicon ore: mainly silicon dioxide (SiO2), which can be extracted from silicon ores such as quartz, quartz sand, and wollastonite. Hydrochloric acid (or chlorine and hydrogen): used to react with metallurgical grade industrial silicon to produce trichlorosilane. Metallurgical grade industrial silicon: as one of the raw materials, it reacts with hydrochloric acid at high temperature to produce trichlorosilane. Hydrogen: used to reduce trichlorosilane to produce high-purity polysilicon rods. Hydrogen chloride: reacts with industrial silicon powder in a synthesis furnace to produce trichlorosilane. Industrial silicon powder: quartz ore and carbon are reduced to produce industrial silicon blocks under power, which are crushed into industrial silicon powder. These raw materials undergo a series of chemical reactions and purification processes to finally obtain high-purity polysilicon materials. Polysilicon is the basic raw material for manufacturing single crystal silicon wafers and is widely used in the semiconductor industry, solar cells and other fields.
polysilicon is the direct raw material for producing single crystal silicon. It is the basic electronic information material for semiconductor devices such as contemporary artificial intelligence, automatic control, information processing, and photoelectric conversion. It is called the “cornerstone of the microelectronics building.”
The main polysilicon producers are Hemlock Semiconductor, Wacker Chemie, REC, TOKUYAMA, MEMC, Mitsubishi, Sumitomo-Titanium, and some smaller producers in China. The top seven companies produced more than 75% of the global polysilicon production in 2006.
Post time: Oct-15-2024
