Patent ID: 8193041

Claim:
A manufacturing method of a semiconductor device, comprising the steps of: (a) providing a lead frame including a chip mounting portion, a plurality of leads, and a support lead having, in cross-section, a to be covered portion connected to the chip mounting portion, a to be exposed portion, and a concave portion formed in a lower surface of the support lead between the to be covered portion and the to be exposed portion; (b) after the step (a), mounting a semiconductor chip on a chip mounting surface of the chip mounting portion of the lead frame, the semiconductor chip including a plurality of pads; (c) after the step (b), electrically connecting the plurality of pads to corresponding ones of the plurality of leads with respective wires; (d) after the step (c), clamping the lead frame with a first molding die and a second molding die, thereby bending the support lead at the concave portion as a starting point, thereby contacting a lower surface of the to be exposed portion of the support lead with an upper surface of the first molding die; and (e) after the step (d), sealing the semiconductor chip, the chip mounting portion, the to be covered portion of the support lead, and the wires with a resin such that the lower surface of the to be exposed portion of the support lead is exposed from the resin, wherein in the step (b), the mounting of the semiconductor chip on the chip mounting surface of the chip mounting portion of the lead frame is performed such that the concave portion does not overlap the semiconductor chip in plan view.