About Us

Galaxy Compound Semiconductors, Inc. is the world's leading Indium Antimonide (InSb) and Gallium Antimonide (GaSb) substrate supplier.

Founded in 1999, the company was originally a spin off of Johnson-Matthey. Our crystal growth dates back to the mid 1960s with Cominco Electronic Materials. Our dedicated engineering staff all have extensive crystal growth and materials experience.

We are located in a modern, spacious facility in Spokane, WA. (Pronounced 'spoh-can'). Our expertise encompasses boule growth, cutting, polishing, substrate analytics, and quality control.

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