Patent ID: 7704860
Filing Date: 2010-04-27
Classification: H01L,H01S

Abstract:
1. A nitride-based semiconductor device comprising: a substrate structure with electrical conductivity; and a semiconductor multilayer structure that is supported on the substrate structure, wherein the principal surface of the substrate structure has at least one vertical growth region, which functions as a seed crystal for growing a nitride-based semiconductor vertically, and a plurality of lateral growth regions for allowing the nitride-based semiconductor that has grown on the vertical growth region to grow laterally, and wherein the sum ΣX of the respective sizes of the vertical growth regions as measured in a first direction, which is parallel to the principal surface of the substrate structure, and the sum ΣY of the respective sizes of the lateral growth regions as measured in the first direction satisfy the inequality ΣX/ΣY>1.0, wherein the vertical and lateral growth regions on the principal surface of the substrate structure extend in stripes perpendicularly to the first direction, and wherein the vertical growth region on the principal surface of the substrate structure is defined by a striped ridge portion that is present on the principal surface of the substrate structure.