Patent ID: 8120156

Claim:
A method for manufacturing an integrated circuit package system with die on base package comprising: forming a base package comprising: forming a substrate having a top surface, the top surface having an inner row and an outer row of bond pads electrically interconnected, mounting an integrated circuit on the top surface of the substrate and electrically connected to the inner row of bond pads, encapsulating the integrated circuit and the substrate with a base molding compound exposing the outer row of bond pads, and testing the base package using the outer row of bond pads; connecting interface interconnects to the base package including system interconnects, leadless contacts, or a combination thereof; attaching a bare die having an active side and a back side to the substrate by bond wires, the system interconnects, or a combination thereof on the active side; attaching an additional substrate to the back side; and encapsulating a package molding compound on the additional substrate covering the bond wires, the system interconnects, the bare die, and the base package.