Patent ID: 9058990
Filing Date: 2015-06-16
Classification: H01L

Abstract:
1. A method for removing a portion of a Group III nitride material from a Group III nitride layer, said method comprising: forming a Group III nitride material layer on a surface of a substrate, wherein said Group III nitride material layer comprises a spall releasing plane containing at least one type of impurity atom embedded within said Group III nitride material layer and wherein said forming said Group III nitride material layer comprises first growing a lower portion of said Group III nitride material layer on said substrate, second growing said spall releasing plane, and third growing an upper portion of said Group III nitride material layer on said spall releasing plane; forming a semiconductor device layer on said upper portion of said Group III nitride material layer forming a stressor layer atop an uppermost surface of said semiconductor device layer; and removing said upper portion of said Group III nitride material layer and said semiconductor device layer by spalling to provide a spalled structure comprising said stressor layer, said semiconductor device layer and said upper portion of said Group III nitride material layer.