Stage 2 of 12Inputs & materials
Silicon
Purifying to electronic-grade polysilicon.
What happens here?
Metallurgical-grade silicon is refined to electronic-grade polysilicon — pure to better than nine nines — the base material from which single-crystal wafers are grown.
Who participates
- Polysilicon producers
- Materials companies
Technologies involved
- Siemens process
- Fluidized-bed reactors
- Distillation
Equipment required
- Siemens deposition reactors
- Distillation columns
Materials required
- Trichlorosilane
- Hydrogen
- Electronic-grade polysilicon
Skills required
- Process chemistry
- Chemical engineering
Research happening
- Fluidized-bed polysilicon
- Energy-efficient purification
Companies operating here
From Semitree's directory (a curated sample) — types: Silicon / wafers, Materials, Chemicals.
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Supply-chain intelligence
These dimensions are architected for this stage. Only data derived from verified sources is shown — no speculative figures.
- Companies· available
- Geographic concentration· planned
- Supply-chain risk· planned
- Capacity· planned
- Investments· planned
- Technology dependencies· planned