| 摘要 |
PURPOSE:To prevent the end surface from deteriorating due to concentration of a current by interposing an active layer with a pair of clad layers of reverse conductive type to each other and forming a contact diffused layer intruded into the inside from both ends of the active layer on the surface of one clad layer. CONSTITUTION:A channel 2 is formed on the main surface of a substrate 1, a lower clad layer 3, an active layer 4, an upper clad layer 5 and a cap layer 6 are laminated, and an anode electrode 7 is formed. Then, a contact diffused layer 8 is formed over the surface layer of the layers 6, 5. In this case, both ends of the layer 8 are disposed inside the end surfaces of the layers 6, 5. Further, a cathode electrode 9 is formed on the lower surface of the substrate 1. |
