Welcome to Sumitomo Electric Semiconductor Materials, Inc. (SESMI), the North American subsidiary of Sumitomo Electric.

Sumitomo Electric is the world's largest manufacturer of compound (III-V) semiconductor wafers (substrates) like GaAs (Gallium Arsenide), InP (Indium Phosphide), GaN (Gallium Nitride) and Epitaxial Wafers utilizing OMVPE, MBE and VPE growth methods. The name Sumitomo is synonymous with quality in III-V materials.

We are very proud to be ISO 9001:2000 certified.

For product information please contact us at 503-693-3100 X207