Patent ID: 7285444

Claim:
A method of manufacturing a semiconductor device comprising the steps of: (a) preparing a lead frame including a chip mounting plate, a common lead connected with, and located outside of, the chip mounting plate, and a plurality of leads arranged around the chip mounting plate; (b) mounting a semiconductor chip over the chip mounting plate; (c) connecting first electrodes of the semiconductor chip with corresponding leads through first wires; (d) connecting second electrodes of the semiconductor chip with the common lead through second wires; (e) forming a sealing body which resin-seals the semiconductor chip, the first wires, and the second wires, the sealing body having a continuous portion of sealing resin which extends from a side surface of the semiconductor chip to a back surface of the semiconductor chip, and from the back surface of the semiconductor for chip to a side surface of the chip mounting plate, with the plurality of leads being partially exposed from a back surface of the sealing body; and (f) cutting the plurality of leads from the lead frame to make a separate package; wherein the lead frame includes suspension leads connected with the chip mounting plate; wherein, in the step (a), the lead frame is prepared such that a back surface of the chip mounting plate protrudes backward relative to back surfaces of the suspension leads; and wherein the step (e) includes placing a sealing sheet over a die surface of a resin mold die, and resin sealing is performed in a manner that the suspension leads are clamped over the die surface with the back surface of the chip mounting plate pressing against the sealing sheet.