Patent ID: 6977396

Claim:
A light emitting device comprising: a first semiconductor layer of a first conductivity type; an active region overlying the first semiconductor layer, wherein the active region is capable of emitting light; a second semiconductor layer of a second conductivity type overlying the active region; a first contact connected to the first semiconductor layer; a second contact connected to the second semiconductor layer; a substrate, wherein the first semiconductor layer, second semiconductor layer and active region are connected to the substrate; a submount; an interconnect disposed between the submount one of the first and second contacts, wherein the interconnect physically and electrically connects the submount to one of the first and second contacts; and an underfill disposed between the submount and the active region, the underfill having a thermal conductivity greater than about 3 W/m-K; wherein at least one of the first contact and the second contact comprises at least one metal layer having a substantially uniform thickness and a substantially uniform lateral extent, wherein the thickness is greater than 3.5 microns.