Electronic Materials Business

Electronic Materials

High-purity polycrystalline silicon is the main product of Tokuyama's Electronic Materials Business. The Tokuyama Factory has an annual production capacity of 6,200 tonnes, which is the largest capacity in Japan. Tokuyama manufactures this material using the Siemens method, and applies its technologies to attain silicon purity of 99.999999999% (eleven 9s), a level that can improve the performance of semiconductors.

Tokuyama initially launched its Electronic Materials Business by supplying high-purity polycrystalline silicon as a raw material for semiconductor wafers. In recent years, polycrystalline silicon has been increasingly in demand as a material for solar cells, which are expected to play a greater role as a renewable energy source.

Tokuyama intends to maintain its competitive edge by leveraging its technologies for ensuring high purity and the quality levels it has achieved in semiconductor applications to produce high-purity polycrystalline silicon for solar cells. In addition to polycrystalline silicon (semiconductor-grade and solar-grade), the Electronic Materials Business manufactures and sells trichlorosilane (TCS), which is used to manufacture epitaxial wafers, tetrachlorosilane (STC), a raw material for synthetic quartz and optical fiber, and high purity metallic boron, an additive agent.

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