Patent ID: 7777351

Claim:
A semiconductor package comprising: a bottom substrate including: opposed top and bottom substrate surfaces; a plurality of top contacts disposed on the top substrate surface, at least some of the top contacts of the bottom substrate each having a solder ball which is of a first maximum diameter disposed thereon; and a plurality of bottom contacts disposed on the bottom substrate surface, each of the bottom contacts of the bottom substrate being electrically connected to at least one of the top contacts thereof; at least one electronic component attached to the top substrate surface of the bottom substrate and electrically connected to at least one the top contacts; a package body at least partially encapsulating the bottom substrate and the electronic component such that at least the bottom substrate surface of the bottom substrate is not covered by the package body, the package body defining top and side surfaces, and including a plurality of vias disposed in the top surface and extending to respective ones of the solder balls of the bottom substrate; and a top substrate including: opposed top and bottom substrate surfaces; a plurality of top contacts disposed on the top substrate surface; and a plurality of bottom contacts disposed on the bottom substrate surface, each of the top contacts of the top substrate being electrically connected to at least one of the bottom contacts thereof; at least some of the bottom contacts of the top substrate each having a solder ball which is of a second maximum diameter substantially equal to the first maximum diameter disposed thereon, the solder balls of the top substrate being mechanically and electrically connected to respective ones of the solder balls of the bottom substrate, with the vias being sized and configured to accommodate the advancement of the solder balls on the top substrate therein to a depth wherein the bottom substrate surface of the top substrate is disposed in extremely close proximity to the top surface of the package body.