Patent ID: 6191436
Filing Date: 2001-02-20
Classification: H01L

Abstract:
An optical semiconductor device comprising:an n-layer having n-conduction type;a p-layer having p-conduction type formed above said n-layer;an electrode formed uniformly on substantially the entire surface of said p-layer and capable of passing light therethrough;an electrode pad for wire bonding located on a portion of said electrode; anda highly resistive region formed in a part of said p-layer below said electrode pad, wherein said n-layer and said p-layer are made of a nitride compound semiconductor including at least one of aluminum (Al), gallium (Ga), and indium (In), said p-layer is a layer whose resistivity is lowered by annealing or electron beam irradiation said p-layer having an unchanged kind of impurity and an unchanged density of impurity, said highly resistive region is formed by said annealing or electron beam irradiation without lowering the resistivity.