Patent ID: 7495249

Claim:
A radiation-emitting semiconductor, comprising: a first confinement layer and a second confinement layer; a radiation-emitting active layer including In x Al y Ga 1-x-y P (0≦x≦1, 0≦y≦1, 0≦x +y≦1) between the first and second confinement layers, wherein the active layer is formed of a different material than both of the first confinement layer and the second confinement layer; wherein the first confinement layer is directly on and has the same crystalline orientation as the active layer and the active layer is directly on and has the same crystalline orientation as the second confinement layer; and wherein the first confinement layer comprises at least one semiconductor material selected from the group consisting of B z In x Al y Ga 1-x-y-z P u N 1-u (0≦x≦1, 0≦y≦1, 0<z≦1, 0≦x+y+z≦1 and 0<u<1)and a II-VI semiconductor material.