Patent ID: 7811380

Claim:
A process of obtaining a mono-crystalline gallium-containing nitride with a supercritical solution formed by dissolving a gallium-containing feedstock in a supercritical ammonia-containing solvent with addition of a mineralizer, the process comprising: forming a polycrystalline gallium-containing nitride feedstock in a reaction vessel, the reaction vessel comprising a dissolution zone in which a metallic gallium feedstock is placed and a crystallization zone in which at least one seed is placed, wherein the polycrystalline gallium-containing nitride feedstock is formed from the metallic gallium feedstock by suppressing convection and chemical transport between the dissolution zone and the crystallization zone and by reacting the metallic gallium feedstock with a supercritical ammonia-containing solvent; and crystallizing a gallium-containing nitride by gradual dissolution of the polycrystalline gallium-containing nitride feedstock by evoking convection and chemical transport and by selective crystallization of gallium-containing nitride on the at least one seed to obtain a bulk mono-crystalline gallium-containing nitride.