Patent ID: 6984851

Claim:
A group-III nitride semiconductor light-emitting diode comprising at least a first conduction-type single crystal substrate provided with a first conduction-type back-surface ohmic electrode on a back surface thereof, a buffer layer comprising a boron phosphide (BP)-based material on a front surface of said single crystal substrate, a gallium nitride (GaN)-based group-III nitride crystal layer having a light-emitting part of hetero-junction structure on said buffer layer, and a window layer comprising an electrically conducting transparent oxide crystal layer on said group-III nitride crystal layer, wherein said group group-III nitride crystal layer comprises a light-emitting layer and a clad layer, at least a second conduction-type surface ohmic electrode conductive with said window layer is between a surface of said group-III nitride clad layer and said window layer and comes into contact with the surface of said group-III nitride clad layer, a pad electrode for wire bonding is disposed on the center of the upper surface of said window layer, said second conduction-type surface ohmic electrode is composed of a plurality of electrodes which are disposed on a surface of a region other than the projective region of the pad electrode on said group-III nitride crystal layer, and said window layer covers and is in contact with the surface of said group-III nitride clad layer on the entire projective region of the pad electrode.