Patent ID: 6731015
Filing Date: 2004-05-04
Classification: H01L

Abstract:
A super low profile package with stacked dies, comprising:a substrate having a through cavity in its center and having a top surface and a bottom surface opposite to the top surface; a heat spreader, which comprises: a base portion, and serving as a die pad for providing support; and an extending portion, radiating from the base portion and fixing the heat spreader onto the bottom surface of the substrate, so that the heat spreader is supported by the substrate by way of the extending portion; a first die seated in the cavity, wherein the first die is attached to the die pad and electrically connected to the substrate; a second die seated in the cavity, wherein the second die is attached to the first die and electrically connected to the substrate, wherein the first die and the second die are disposed above the heat spreader; a molding compound filling the cavity and encapsulating the first die, the second die, the heat spreader, and part of the bottom surface of the substrate; and a plurality of solder balls attached directly to the bottom surface of the substrate, wherein the heat spreader and the solder balls are both disposed on the same side of the substrate.