Patent ID: 9590155
Date: 2017-03-07
CPC Classifications: H01L,H05K

Claim:
1. A light emitting device comprising: a copper (Cu) substrate; a first metallic layer comprising a reflective metal disposed over the Cu substrate for increasing brightness of the device, wherein the first metallic layer comprises silver (Ag); a second metallic layer disposed between the Cu substrate and the first metallic layer for forming a diffusion barrier therebetween, wherein the second metallic layer contacts portions of the Cu substrate and the first metallic layer; and one or more light emitting diode (LED) chips disposed over the Cu substrate, wherein the Cu substrate comprises one or more electrically conductive traces and a conductive pad over which the first and second metallic layers are disposed, wherein a pap is disposed between the one or more electrically conductive traces and the conductive pad, wherein the gap between the conductive pad and the one or more electrically conductive traces is smaller in width than a second gap between portions of the first and second metallic layers disposed over each of the conductive pad and the one or more electrically conductive traces.