Patent ID: 7808788
Filing Date: 2010-10-05
Classification: H05K

Abstract:
1. An electronic circuit board assembly, comprising: a multi-layer thermal conduction structure including first and second stacks of conductive layers, the conductive layers of said second stack being interleaved with but electrically insulated from the conductive layers of said first stack such that an exposed conductive layer of said first stack forms a top surface of said thermal conduction structure and an exposed conductive layer of said second stack forms a bottom surface of said thermal conduction structure; first and second sets of conductive vias, said first set of conductive vias being electrically joined to said top surface and the conductive layers of said first stack but electrically isolated from said bottom surface and the conductive layers of said second stack, and said second set of conductive vias being electrically joined to said bottom surface and the conductive layers of said second stack but electrically isolated from said top surface and the conductive layers of said first stack, thereby providing vertical thermal conduction paths through said thermal conduction structure while preserving electrical insulation between said top surface and said bottom surface; a power electronic device having an exposed metal base that is thermally affixed to the top surface of said thermal conduction structure; and a heatsink that is thermally affixed to the bottom surface of said thermal conduction structure opposite said power electronic device so that the exposed metal base of said power electronic device is thermally coupled to the heatsink through the first and second stacks of interleaved conductive layers and the first and second sets of conductive vias, and yet electrically insulated from the heatsink.