Patent ID: 8426893
Filing Date: 2013-04-23
Classification: H01L

Abstract:
1. An epitaxial substrate for an electronic device, comprising: a conductive SiC single crystal substrate, a buffer as an insulating layer on the SiC single crystal substrate, and a main laminate formed by epitaxially growing a plurality of Group III nitride layers on the buffer, wherein a lateral direction is a current flow direction, the buffer includes at least an initial growth layer in contact with the SiC single crystal substrate and a superlattice laminate having a superlattice multi-layer structure on the initial growth layer, the initial growth layer is made of a B the superlattice laminate is configured by alternately stacking a first layer made of a B at least one of the superlattice laminate and a portion of the main laminate on the buffer side has a C concentration of 1×10