Patent ID: 6222208
Filing Date: 2001-04-24
Classification: H01L

Abstract:
A light-emitting diode comprising:a semiconductor substrate;a first semiconductor epitaxial layer of a first conduction type formed on or above said semiconductor substrate;a second semiconductor epitaxial layer of the first conduction type laminated upon said first semiconductor epitaxial layer and having an energy band gap greater than an energy band gap of said first semiconductor epitaxial layer;an impurity diffusion area of a second conduction type having island shape formed within said first and second semiconductor epitaxial layers, said impurity diffusion area being formed by selective diffusion of an impurity of the second conduction type, a diffusion front of said impurity diffusion areas extending from a top surface of said second semiconductor epitaxial layer therethrough into said first semiconductor epitaxial layer; andan electrode contact semiconductor layer of the second conduction type provided on a top surface of said impurity diffusion area, said electrode contact semiconductor layer being formed by selective diffusion of the impurity of the second conduction type and having no contact with said second semiconductor epitaxial layer outside said impurity diffusion area,said second semiconductor epitaxial layer having a recess formed in a top surface thereof including the diffusion front that extends to the top surface, said recess surrounding the electrode contact semiconductor layer.