Patent ID: 8481368

Claim:
A method for flip-chip packaging a semiconductor device comprising: providing a lead frame comprising a plurality of die paddles, each of which includes a first base, a second base and a lead base, wherein the second base and the lead base are arranged near the first base and separated from the first base, and wherein a plurality of grooves are formed on a top surface of the first base and a top surface of the second base with the grooves arranged on the top surface of the first base dividing the top surface of the first base into multiple areas comprising a plurality of first connecting areas, and the grooves arranged on the top surface of the second base divide the top surface of the second base into multiple areas comprising at least a second connecting area; coating a conductive material on the first connecting areas and the second connecting area; flipping and connecting a semiconductor chip on the first base and the second base, wherein a first electrode of the semiconductor chip is contacted with the first connecting areas and the second electrode of the semiconductor chip is contacted with the second connecting area; connecting a third electrode located at a back surface of the semiconductor chip to the lead base by a bonding wire; encapsulating the lead frame, the semiconductor chip and the bonding wire by molding material; and cutting the lead frame and the molding material to separate individual packages, each of which includes the semiconductor chip, the bonding wire and the die paddle encapsulated with the molding material.