Patent ID: 7955953

Claim:
A method of packaging semiconductor integrated circuits, comprising the steps of: providing a transfer film; forming a patterned, conductive layer on a surface of the transfer film via a photolithography process; attaching a first semiconductor integrated circuit (IC) to the transfer film, wherein an active side of the first IC is attached to the transfer film; attaching a second semiconductor IC to the first IC, wherein a bottom side of the second IC is attached to a bottom side of the first IC; electrically connecting die pads on an active surface of the second IC to the conductive layer with wires; providing a resin material on one side of the transfer film to encapsulate the first and second ICs, the wires and a portion of the conductive layer; removing the transfer film, thereby exposing the active side of the first IC and the conductive layer; forming an electrical distribution layer over the active side of the first IC and the conductive layer; and attaching conductive balls to the electrical distribution layer, wherein the conductive balls allow electrical interconnection to the first and second integrated circuits.