Patent ID: 6228669
Filing Date: 2001-05-08
Classification: H01L

Abstract:
A method for manufacturing a planar mount light emitting diode (LED) element comprising:forming a P type metal film at a predetermined portion on one surface of an N type LED substrate at a portion where a PN junction is to be formed on said surface of the N type LED substrate;forming an N type metal film at a predetermined portion on said surface of said N type LED substrate at a portion where an N electrode is to be formed on the surface of said N type LED substrate;covering said two films with an insulation film to form a capped construction;applying heat treatment at a diffusing temperature to the portion where the PN junction is to be provided, thereby to form the PN junction;irradiating a laser beam to the portion where the N electrode is to be provided, thereby to form a heavily-doped N type alloy portion that reaches said N type LED substrate;removing said insulation film; andforming the P electrode on said PN junction and forming the N electrode on said heavily-doped N type alloy portion, thereby to form the P electrode and the N electrode on the same side of the LED substrate.