Patent ID: 7323366

Claim:
A manufacturing method of a semiconductor device, comprising the steps of: (a) providing a semiconductor chip including a main surface over which a plurality of electrodes are formed, and a back surface opposing to the main surface; (b) providing a lead frame including a chip mounting part, and a plurality of leads arranged around the chip mounting part, a size of the chip mounting part is smaller than that of the semiconductor chip, and each of the plurality of leads has a first main surface, a second main surface opposing to the first main surface, and a third main surface which is disposed at a height between the first main surface and the second main surface, and which is arranged nearer the chip mounting part than the first main surface is the chip mounting part; wherein a width of the second main surface and a width of the third main surface of at least one lead, of said plurality of leads, in a direction perpendicular to a direction that the at least one leads extends, is greater than a width of said first surface of the at least one lead in said direction perpendicular to the direction that the at least one lead extends; (c) mounting the semiconductor chip over the chip mounting part such that the back surface of the semiconductor chip is opposed to the third main surface of each of the plurality of leads; (d) electrically connecting the plurality of electrodes of the semiconductor chip with the second main surface of each of the plurality of leads through conductive wires, respectively; (e) forming a molded body sealing the semiconductor chip and the conductive wires such that the first main surface of each of the plurality of leads is exposed from a mounting surface of the molded body; and (f) individually separating each of the plurality of leads from the lead frame.