Patent ID: 8415245

Claim:
A method of manufacturing a semiconductor device comprising the steps of: (a) preparing a lead frame including a chip mounting portion to which a semiconductor chip is mounted and a plurality of leads arranged around the chip mounting portion; (b) mounting the semiconductor chip to the chip mounting portion of the lead frame; and (c) connecting an electrode pad of the semiconductor chip and the lead corresponding to the electrode pad by a wire in accordance with a guide by a capillary, wherein the step (c) includes a height control step of controlling a height of the capillary so that the capillary presses the wire in a stepwise fashion from a first point where the wire contacts the lead to a second point where the capillary contacts the lead when connecting the wire to the lead, and a height of a tip portion of the capillary is monitored, and a magnitude of load to be applied to the wire from the capillary is decreased when a lowering speed of the capillary is larger than a setting value, and the load to be applied to the wire from the capillary is increased when the lowering speed of the capillary is smaller than the setting value.