Alumina substrate and method of making an alumina substrate

An alumina substrate comprising:

• an alumina layer having a first surface and a second surface;
• one or more aluminum vias formed within the alumina layer, each of the one or more aluminum vias extending between the first surface of the alumina layer and the second surface of the alumina layer, each of the plurality of aluminum vias further having a first pad at the first surface of the alumina layer and a second pad at the second surface of the alumina layer, wherein the one or more aluminum vias are integrally formed in the alumina layer;
• a light emitting diode (LED) coupled to the first pad of one of the plurality of aluminum vias;
• a reflector coupled to the first surface of the alumina layer, wherein the reflector has a fin structure having a first surface coupling the alumina layer and a second surface opposite to the first surface, the fin structure including a plurality of fins on both the first and second surfaces thereof
• an additional alumina layer having a first surface and a second surface, wherein the additional alumina layer has a similar structure as the alumina layer;
• and
• a printed circuit board (PCB) coupled between the second surface of the alumina layer and the first surface of the additional alumina layer to form build-up layers.