Patent ID: 6133588
Filing Date: 2000-10-17
Classification: H01L

Abstract:
A light emitting element, comprising:a semi-insulating upper layer and a lower layer of a first conductive type;a light-emitting area of a second conductive type, formed by diffusion of an impurity into said semi-insulating upper layer and said lower layer, possessing a pn junction in said lower layer;a current-conducting area of said second conductive type, formed by diffusion of said impurity into said semi-insulating upper layer, contiguous with said light-emitting area but not extending into said lower layer; andan electrode formed on a semiconductor substrate; making electrical contact with said current-conducting area, for feeding current through said current-conducting area to said light-emitting area,wherein said semiconductor substrate has an additional layer of said first conductive type disposed below said lower layer, and said lower layer has a lower band-gap energy than said additional layer.