Patent ID: 7708427

Claim:
A light source device comprising: a substrate having thru-holes with thermally conductive material therein, said substrate including top and bottom major surfaces, said substrate further including depressions in said top major surface that form reflector cups; a plurality of active electrical traces on said top major surface of said substrate, said plurality of active electrical traces including a central anode bus and first and second cathode buses, said central anode bus being situated between said first and second cathode buses such that a first group of said reflector cups are positioned between the central anode bus and said first cathode bus and a second group of said reflector cups are positioned between the central anode bus and said second cathode bus, said central anode bus having extensions to the bottom surface of each of said reflector cups of said substrate, said first cathode bus having extensions toward each of said first group of said reflector cups, said second cathode bus having extensions toward each of said second group of said reflector cups; a plurality of light-emitting dies mounted in said reflector cups of said substrate on said extensions of said central anode bus, each of said light-emitting dies mounted in said first group of said reflector cups being electrically bondwire connected to said extensions of said first cathode bus, each of said light-emitting dies mounted in said second group of said reflector cups being electrically bondwire connected to said extensions of said second cathode bus, each of said light-emitting dies being positioned directly over one of said thru-holes of the substrate, said thru-holes being used to dissipate heat generated from said light-emitting dies; and at least one dummy electrical trace on said bottom major surface of said substrate, said thermally conductive material in each of said thru-holes being connected to said at least one dummy electrical trace.