Patent ID: 9589792
Date: 2017-03-07
CPC Classifications: C30B,H01L

Claim:
1. A group III metal nitride crystal made from a process comprising: depositing at least one patterned mask layer on a substrate to form a patterned substrate, said mask layer comprising at least an inert layer comprising one or more of Au, Ag, Pt, Pd, Rh, Ru, Ir, Ni, Cr, V, Ti, or Ta, said inert layer being adhered to said substrate; placing said patterned substrate within a sealable container along with a group III metal source, at least one mineralizer composition, and a nitrogen containing solvent; and forming an ammonothermal group III metal nitride layer having one or more coalescence fronts on the patterned substrate by heating said sealable container, wherein said one or more coalescence fronts comprise a pattern of locally-approximately-linear arrays of threading dislocations, said threading dislocations having a concentration between about 5 cm