Patent ID: 8207544
Filing Date: 2012-06-26
Classification: B82Y,H01L,H01S

Abstract:
1. A III-nitride semiconductor device comprising: a support base comprising a III-nitride semiconductor and having a primary surface, the primary surface extending along a first reference plane perpendicular to a reference axis, the reference axis being inclined at a predetermined angle ALPHA with respect to the c-axis of the III-nitride semiconductor; and an epitaxial semiconductor region provided on the primary surface of the support base, the epitaxial semiconductor region comprising GaN-based semiconductor layers, the reference axis being inclined at a first angle ALPHA the reference axis being inclined at a second angle ALPHA the predetermined angle, the first angle, and the second angle having a relation of ALPHA=(ALPHA a morphology of an outermost surface of the epitaxial semiconductor region including plural pits, and a pit density of the pits being not more than 5×10