Patent ID: 8496357

Claim:
A light emitting diode (LED) device, comprising: a composite substrate, comprising a metal frame sandwiched with a first carbon fiber layer and a second carbon fiber layer, the composite substrate further comprising a third carbon fiber layer disposed on the second carbon fiber layer, wherein arranged directions of carbon fibers of at least two of the first, second and third carbon fiber layers are unparallel to each other; and an LED element, disposed on the composite substrate, wherein the first carbon fiber layer and the second carbon fiber layer cover at least one portion of the metal frame to form a recess, wherein an arranged direction of carbon fibers of the first carbon fiber layer and an arranged direction of carbon fibers of the second carbon fiber layer are unparallel to each other, wherein the metal frame has a metal reflection layer plated on a surface of the recess, and wherein the metal reflection layer covers at least one portion of the first carbon fiber layer.