Patent ID: 10388831

Abstract:
A light-emitting device including a window layer-cum-support substrate, a light-emitting portion provided on the window layer-cum-support substrate and including a second semiconductor layer of a second conductivity type, an active layer, and first semiconductor layer of a first conductivity type in stated order, a first ohmic electrode provided on the first semiconductor layer, and insulator top coat at least partially coating the first semiconductor layer surface and light-emitting portion side surface, wherein the first semiconductor layer surface and surface of the window layer-cum-support substrate are roughened, and the first semiconductor layer includes at least two layers of an active-layer-side layer and roughened-side layer, and roughened-side layer is formed of material having lower Al content than the active-layer-side layer. This light-emitting device can reduce etching depth required to obtain desired roughened shape and inhibit occurrence of chip cracks during wire bonding, while keeping effect of trapping carriers in the clad layer.