Patent ID: 7755186

Claim:
An assembly comprising: a printed circuit board (PCB) having a topside surface, a backside surface, a first opening and one or more second openings extending between the topside and backside surfaces, the one or more second openings each being smaller than the first opening, a die-down integrated circuit (IC) package comprising a substrate having a top surface and an opposing bottom surface, the bottom surface positioned above and electrically coupled to the topside surface of the PCB, a semiconductor die having a topside surface and a backside surface housed between a heat spreader and the bottom surface of the substrate, the heat spreader having an inside surface and an outside surface, the topside surface of the die electrically coupled to the bottom surface of the substrate, the backside surface of the die thermally coupled to the inside surface of the heat spreader, the outside surface of the heat spreader residing below the topside surface of the PCB, a cooling plate located below and thermally coupled to the outside surface of the heat spreader, a heat sink located above the topside surface of the PCB; and one or more conduits for carrying a coolant between the cooling plate and the heat sink through the one or more second openings of the PCB.