Patent ID: 8476615
Filing Date: 2013-07-02
Classification: B82Y,H01L,H01S

Abstract:
1. A GaN-based semiconductor light emitting device, comprising: a substrate of a first GaN-based semiconductor having a primary surface, the primary surface tilting from a plane normal to a reference axis being the axis [0 0 0 1] or [0 0 0 −1] of the first GaN-based semiconductor toward the m-axis of the first GaN-based semiconductor at a tilt angle of more than or equal to 63 degrees and less than 80 degrees; a GaN-based semiconductor epitaxial region provided on the primary surface; an active layer provided on the GaN-based semiconductor epitaxial region; an electron blocking layer provided on the active layer; and a contact layer provided on the electron blocking layer, wherein: the active layer comprises a second GaN-based semiconductor, the second GAN-based semiconductor containing indium; the electron blocking layer comprises a third GaN-based semiconductor, the third GaN-based semiconductor having a bandgap larger than the bandgap of the second GaN-based semiconductor; the contact layer comprises of a fourth GaN-based semiconductor, the fourth GaN-based semiconductor having a bandgap equal to or less than the bandgap of the third GaN-based semiconductor; and the first GaN-based semiconductor of the substrate has a dislocation density of 1×10