US Patent 8929071 Low cost manufacturing of micro-channel heatsink

A cooling device includes a ceramic substrate with a metal layer bonded to an outer planar surface. The cooling device also includes a channel layer bonded to an opposite side of the ceramic substrate and a manifold layer bonded to an outer surface of the channel layer. The substrate layers are bonded together using a high temperature process such as brazing to form a single substrate assembly. A plenum housing is bonded to the single substrate assembly via a low temperature bonding process such as adhesive bonding and is configured to provide extended manifold layer inlet and outlet ports.