Facility

Sumiden Semiconductor Materials Itami substrate plant

Sumitomo Electric identifies its Itami semiconductor-materials site with gallium-arsenide crystal growth and wafer processing.

Facts on this page last re-verified Aug 18, 2026 — the oldest verification date among its current claims. How we verify.

Location: Itami, Hyogo, Japan

Crystal substrate

Gallium-arsenide crystal and wafer line

Operating

Gallium-arsenide single-crystal growth and wafer processing

High-Purity Gallium → Gallium Arsenide Bulk Crystal, Gallium Arsenide Wafer

No capacity claim. Absence of a figure means no source publishes one.

No qualification claim. Status does not imply qualified output.

Sumitomo Electric Industries · published May 1, 2019 · retrieved Aug 18, 2026 · archive