Patent ID: 8709371
Filing Date: 2014-04-29
Classification: C30B,Y10T

Abstract:
1. A method for growing group III-nitride crystals, comprising: (a) loading source materials and seed crystals into a reaction vessel, wherein part or all of the source materials are prepared by a recycling process for a nutrient used in a previous ammonothermal process or fragments of the group III-nitride crystals grown in the previous ammonothermal process and the recycling process includes annealing the nutrients or the fragments at more than 600° C. in a reducing environment; (b) filling the reaction vessel with ammonia; and (c) raising the reaction vessel's temperature to attain a supercritical state for the ammonia wherein convection of the supercritical ammonia transfers the source materials and deposits the transferred source materials onto the seed crystals.