Patent ID: 6465812
Filing Date: 2002-10-15
Classification: H01L,H01S

Abstract:
A semiconductor light emitting device, comprising:a GaAs substrate whose principal plane is inclined from a (100) plane in a <011> orientation; a first buffer layer of AlxGa1âˆ’xAs (0&lE;x&lE;1) provided on the principal plane of the GaAs substrate; a second buffer layer of AlyGazIn1âˆ’yâˆ’zP (0&lE;y&lE;1 and 0&lE;z&lE;1) provided on the first buffer layer; a first cladding layer of AlsGatIn1âˆ’sâˆ’tP (0&lE;s&lE;1 and 0&lE;t&lE;1) provided on and contacting the second buffer layer; an active layer provided on the first cladding layer; and a second cladding layer provided on the active layer, wherein an Al content s of the first cladding layer is larger than an Al content y of the second buffer layer, and wherein the first cladding layer and the second buffer layer are of the same composition type.