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PROCESS FOR LARGE-SCALE AMMONOTHERMAL MANUFACTURING OF GALLIUM NITRIDE BOULES

United States Patent Application

20150132926
A1
View the Complete Application at the US Patent & Trademark Office
Large-scale manufacturing of gallium nitride boules using m-plane or wedge-shaped seed crystals can be accomplished using ammonothermal growth methods. Large-area single crystal seed plates are suspended in a rack, placed in a large diameter autoclave or internally-heated high pressure apparatus along with ammonia and a mineralizer, and crystals are grown ammonothermally. The orientation of the m-plane or wedge-shaped seed crystals are chosen to provide efficient utilization of the seed plates and of the volume inside the autoclave or high pressure apparatus.
D'EVELYN, MARK P. (SANTA BARBARA, CA), EHRENTRAUT, DIRK (SANTA BARBARA, CA), KAMBER, DERRICK S. (GOLETA, CA), DOWNEY, BRADLEY C. (SANTA BARBARA, CA)
14/ 599,335
January 16, 2015
[0002] This invention was made with government support under Contract DE-SC0006168 awarded by the U.S. Department of Energy. The government has certain rights in the invention.