Distributed Bragg reflector on an aluminum package for an LED

Abstract

A light-emitting diode (LED) assembly includes an aluminum substrate, a silver layer, a distributed Bragg reflector (DBR) and an LED device. The aluminum substrate has a top surface whose length and width are each more than once centimeter. The silver layer is disposed over the entire top surface of the aluminum substrate. The DBR is disposed over the entire upper surface of the silver layer. The DBR includes an upper reflector layer and a lower reflector layer. The lower reflector layer contacts the upper surface of the silver layer. The Led device is attached to the upper reflector layer of the DBR, but the LED device is not disposed over the entire upper reflector layer. In one embodiment, the silver layer is deposited on the substrate using physical vapor deposition. In another embodiment, multiple pairs of lower reflector and higher reflector layers are included.

Dependencies are inferred from the claim text.