Microelectronic interconnect substrate and packaging techniques

摘要

A LED (Light Emitting Diode) substrate and packaging for a single diode or a diode array is described. The substrate includes an integral reflector(s) for the diode(s) in the form of a shaped cavity (or cavities) to house the diode die(s). The reflector cavity walls can optionally be plated with a reflective material and may include a molding material to serve as lens and sealant. Also described is a method for building a substrate with direct metal connection of low thermal path between a die and a bottom surface of the substrate. Another embodiment is for two electrical traces crossing each other without the need for a two layer interconnect structure. The substrate and reflector structures are built of aluminum-aluminum oxide composition applying a technology known in the art as ALOX technology. The resulting substrate and packaging afford the required electrical interconnections and enhanced thermal performance while maintaining excellent mechanical properties. The same substrate and packaging concepts can be applied for other high power devices requiring high thermal conductivity substrate and package.