Patent ID: 7006353
Filing Date: 2006-02-28
Classification: H01L

Abstract:
1. A circuit board assembly comprising: a circuit board including a plurality of conductive circuit traces extending from a plurality of contact surfaces; a substrate having a plurality of contact terminals, individually connected to the contact surfaces of the circuit board by solidifying molten solder, an outer surface facing away from the circuit board, including a central portion and an annular portion extending around the central portion, and a plurality of contact surfaces, extending along the central portion of the outer surface of the substrate, electrically connected within the substrate to the plurality of contact terminals of the substrate; a circuit chip extending adjacent the central portion of the outer surface of the substrate, wherein the circuit chip has a plurality of contact terminals, individually connected to the contact surfaces of the substrate by solidifying molten solder, and an outer surface; a heat sink extending outwardly from the circuit chip and the substrate, wherein the heat sink includes an inner surface having a central portion extending adjacent the outer surface of the circuit chip and an annular portion extending outward from the central portion; a layer of thermally conductive material extending between the external surface of the circuit chip and the central portion of the inner surface of the heat sink; and a cured layer of cure shrinkable adhesive extending between the annular portion of the outer surface of the substrate and the annular portion of the inner surface of the heat sink to hold the heat sink in place over the substrate and to hold the layer of thermally conductive material in compression.