Patent ID: 7723731
Filing Date: 2010-05-25
Classification: H01L

Abstract:
1. A semiconductor light emitting device, comprising: AlGaInP based semiconductor layers, comprising: a first conductivity type cladding layer; a second conductivity type cladding layer doped with Mg; and an active layer sandwiched by the first conductivity type cladding layer and the second conductivity type cladding layer, and generating a light; a first electrode for partially covering a main surface; a second electrode for covering an opposite surface opposite to the main surface; a reflective metal film provided between the second conductivity type cladding layer and the second electrode, and reflecting the light advanced from the active layer; and a second conductivity type contact layer provided between the second conductivity type cladding layer and the reflective metal film, the second conductivity type contact layer comprising divided contact layers comprising a first, a second, and a third divided contact layer, each of the divided contact layers comprising a same material, wherein the same material of the first divided contact layer is Zn-doped, the same material of the second conductivity layer is undoped, and the material of the third divided contact layer is Mg-doped, the first, the second, and the same third divided contact layers are laminated in this order, and wherein the Mg-doped layer is provided at a side close to the second conductivity cladding layer.