Patent ID: 9276379
Filing Date: 2016-03-01
CPC Classification: B82Y,H01L,H01S

Claim Text:
1. A III-V semiconductor light emitting device comprising a first conductive clad layer, an active layer, and a second conductive clad layer laminated on a substrate in this order closer to the substrate, wherein the second conductive clad layer is an AlGaInP-based semiconductor mixed crystal and has a laminated structure of at least three layers, including a first layer, a second layer, and a third layer disposed in this order closer to the active layer, the second layer and the third layer are included in a striped ridge, and the second layer is positioned at a skirt of the ridge, the first layer has a flat surface under both sides of the striped ridge and parallel to the active layer, Al compositions X1, X2, and X3 of the first layer, the second layer, and the third layer, respectively, satisfy a relation: X2>X1 and X2>X3, and film thicknesses D1, D2, and D3 of the first layer, the second layer, and the third layer, respectively, satisfy a relation: D2<D3.