Silicon Metal For Polysilicon

Silicon metal feedstock for polysilicon and semiconductor production

Overview

The Starting Point Of The Silicon Value Chain

Polysilicon is produced from silicon metal through the trichlorosilane (TCS) route: silicon metal reacts with hydrogen chloride to form trichlorosilane, which is then purified and deposited as high purity polysilicon.

Because impurities carry through the process, low-impurity silicon metal is essential. Stable Fe / Al / Ca content and consistent supply directly affect downstream polysilicon quality and yield — making grade selection critical for both semiconductor and solar applications.

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Process & Use

From Silicon Metal To Polysilicon

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Trichlorosilane (TCS)

Silicon metal + HCl produces trichlorosilane, the key intermediate for polysilicon deposition.

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Polysilicon

Purified TCS is deposited (Siemens process) into high purity polysilicon rods or granules.

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Semiconductor Grade

Ultra-low impurity polysilicon for wafers, integrated circuits and electronic devices.

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Solar Grade

Polysilicon for ingots, wafers and solar cells along the photovoltaic value chain.

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Low Impurity Matters

Fe / Al / Ca content carries through — lower impurities mean higher downstream quality.

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Stable Bulk Supply

Consistent grades and reliable volume for continuous polysilicon production.

Product	Typical Grade	Size	Note
Silicon Metal Lump	441 / 3303 / 2202	10–100mm	TCS feedstock, lower impurities
High Purity Silicon Powder	3N+	Custom PSD	High purity downstream needs

Product

Typical Grade

Size

Note

Silicon Metal Lump

441 / 3303 / 2202

10–100mm

TCS feedstock, lower impurities

High Purity Silicon Powder

3N+

Custom PSD

High purity downstream needs

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