Sumitomo Electric Industries (compound semiconductors)
The compound semiconductor business of the Osaka-based wire and cable maker, supplying SiC epitaxial and bulk wafers and GaAs and InP substrates for power and optical communication devices.
住友電気工業・Wafers, substrates and photomasks・Last updated: October 27, 2026
Overview
Sumitomo Electric Industries is headquartered in Osaka and is best known for electric wire and optical fiber. Its compound semiconductor business supplies wafers for power devices and optical communications.
Products include SiC epitaxial and bulk wafers and GaAs and InP substrates. Its works in Osaka, Itami (Hyogo) and Ibaraki Prefecture are manufacturing sites of the group.
Business: SiC epitaxial wafers and GaAs and InP substrates
Why it matters
- InP substrates are the base for the lasers and photodetectors in optical transceivers used in data centres.
- SiC epitaxial wafers are where power device makers start their device processing.
Main products
- •SiC epitaxial wafers
- •SiC bulk wafers
- •GaAs substrates
- •InP substrates
Sites in Japan
Head officeHeadquarters
Osaka, Osaka
Osaka WorksPlant
Osaka, Osaka
Itami WorksPlant
Itami, Hyogo
Ibaraki WorksPlant
Hitachi, Ibaraki