Patent ID: 6713792
Filing Date: 2004-03-30
Classification: H05K

Abstract:
A printed circuit board capable of accepting a heat-generating electronic component, comprising:a) a substrate having a signal layer on at least a portion of a first surface of said substrate; b) a metal ground layer adjacent at least a portion of a second surface of said substrate; c) a heat sink layer; d) a bonding layer for affixing said heat sink layer to said metal ground layer and, where said metal ground layer is not coextensive with said substrate, for affixing said heat sink layer to said second surface of said substrate; e) a void formed in said substrate, including in said signal layer and in said ground layer, said void sized to accept the heat-generating electronic component; f) a through-hole formed in said substrate, including in said signal layer and in said metal ground layer, said through-hole continuing through said bonding layer and at least partially into said heat sink layer; g) wherein said through-hole is partially plated with conductive plating to place said heat sink layer and said metal ground layer in electrical and thermal communication and wherein said through-hole is further filled with non-conductive filler to maintain electrical isolation between said metal ground layer and said signal layer.