Patent ID: 8021481
Filing Date: 2011-09-20
Classification: B01J,C30B,Y10T

Abstract:
1. A process for growing a crystalline gallium-containing nitride, the process comprising: providing an autoclave comprising gallium-containing feedstock in one zone and at least one seed in another zone; introducing a solvent capable of forming a supercritical fluid into at least the one zone and the other zone; maintaining a pressure at or above about seven (7) atmospheres within the one zone and the other zone during introduction of the solvent into the one zone and the other zone; processing one or more portions of the gallium-containing feedstock in the supercritical fluid to provide a supercritical solution comprising at least gallium containing species at a first temperature; and growing crystalline gallium-containing nitride material from the supercritical solution on the seed at a second temperature, the second temperature being characterized to cause the gallium containing species to form the crystalline gallium containing nitride material on the seed; the process further including step of heating the autoclave and purging it prior to introducing the solvent.