Patent ID: 8125066

Claim:
An integrated circuit (IC) package comprising: a first IC package comprising: a first package substrate; a first IC disposed on a top surface of the first package substrate; a plurality of solder balls disposed on the top surface of the first package substrate, wherein the plurality of solder balls surrounds the first IC, and wherein a top surface of each solder ball of the plurality of solder balls is exposed; and a molding compound covering the top surface of the first package substrate, wherein the molding compound substantially surrounds the first IC and the plurality of solder balls; a second package substrate disposed over the first IC package, the second package substrate having a plurality of contact pads disposed on a top surface of the second package substrate and wherein the second package substrate is electrically coupled with the first IC package through the exposed top surface of the plurality of solder balls, wherein the second package substrate includes a side extension extending outward along an outer periphery of the second package substrate, and wherein a plurality of decoupling capacitors disposed on the top surface of the first package substrate is disposed between an inner side surface of the side extension and an outer edge of the first IC; and a second IC package disposed on the top surface of the second package substrate.