Patent ID: 7381593

Claim:
A method for stacked die packaging, comprising: providing a leadframe configured for supporting a lower semiconductor die on the top thereof, the leadframe having a die attach pad and leadfingers disposed and supported around the periphery of the die attach pad; stamping and forming pillars in the leadframe around the die attach pad for supporting an upper semiconductor die on the pillars above the lower semiconductor die, the pillars being formed integrally with and of the same material as the leadframe, and sized to have a predetermined height that is higher than the height of such a lower semiconductor die plus the height of bonding wires for such a lower semiconductor die plus a predetermined spacing between such bonding wires and the bottom of an upper semiconductor die to be supported on the pillars; attaching such a lower semiconductor die to the die attach pad with adhesive; wire-bonding the lower semiconductor die to the leadfingers with bonding wires; attaching an upper semiconductor die to the pillars with adhesive; wire-bonding the upper semiconductor die to the leadfingers with bonding wires; and packaging at least the lower and upper semiconductor dies and the bonding wires in an encapsulant.