Tokuyama
A Japanese chemical company that makes semiconductor-grade polysilicon, the raw material for silicon wafers.
トクヤマ・Materials・Last updated: October 23, 2026
Overview
Tokuyama has its head office in Tokyo. Its semiconductor-grade polysilicon has a purity of 99.999999999% (11N), and Tokuyama also makes the high-purity trichlorosilane raw material in-house. Wafer makers melt the polysilicon and pull it into single-crystal ingots.
Business: Polysilicon and electronic chemicals
Why it matters
Polysilicon is the first link in the silicon wafer supply chain, before crystal growth and wafering.
Main products
- •Semiconductor-grade polysilicon (11N)
Sites in Japan
Head officeHeadquarters
Tokyo
Products (1)
- 11N polysilicon (semiconductor grade) · Polysilicon