Patent ID: 8513696

Claim:
A lateral thermal dissipation LED, comprising: a substrate; an N type conductive semiconductor layer disposed on the substrate; a light emitting layer disposed on the N type conductive semiconductor layer; a P type conductive semiconductor layer disposed on the light emitting layer; a heat spreading layer connecting the N type conductive semiconductor layer to a package substrate, the heat spreading layer being made by mixing silver and epoxy; a buffer layer interposed between the substrate and the N type conductive semiconductor layer; an undoped semiconductor layer interposed between the buffer layer and the N type conductive semiconductor layer; and a metal layer with a pattern disposed on the undoped semiconductor layer, wherein the pattern of the metal layer includes a plurality of holes, and the metal layer with the pattern and the N type conductive semiconductor layer have ohmic contact resistance; wherein portions of the P type conductive semiconductor layer, the light emitting layer and the N type conductive semiconductor layer are removed to expose portions of the N type conductive semiconductor layer and the metal layer, and the heat spreading layer covers the exposed portions of the N type conductive semiconductor layer and the metal layer, wherein the n-type conductive semiconductor layer is formed within the plurality of holes, and wherein the heat spreading layer partially covers two side surfaces of the metal layer and a top surface of the metal layer which is orthogonal to the side surfaces of the metal layer.