Patent ID: 7939834

Claim:
A light-emitting device comprising: a substrate having an epitaxial-forming surface and a back surface opposite to said epitaxial-forming surface, said substrate being formed with a recess indented from said back surface, said back surface having a recessed portion that defines said recess, and a planar portion extending outwardly from said recessed portion, wherein said recessed portion of said back surface of said substrate has an inner end that is spaced apart from said epitaxial-forming surface of said substrate by a distance not less than 5 μm; an epitaxy layer formed on said epitaxial-forming surface of said substrate; a continuous heat-dissipating layer formed on said planar portion and said recessed portion of said back surface of said substrate, wherein the heat-dissipating layer has an extension disposed outwardly of the back surface of the substrate; and first and second electrodes coupled electrically to said epitaxy layer, wherein one of said first and second electrodes is formed on said epitaxy layer and the other of said first and second electrodes is formed on said extension of the heat dissipating layer.