Patent ID: 7910472

Claim:
A method of manufacturing a semiconductor device, connecting between a first bonding point and a second bonding point using a wire, the method comprising: a bump forming step of forming a bump by folding the wire to be stacked on the second bonding point, the bump including a bent wire convex portion on an opposite side from the first bonding point; a bonding step of looping the wire from the first bonding point toward the bump, positioning an inner chamfer of a capillary above the bent wire convex portion, bonding the wire by pressing the wire to an upper surface of the bump with a face portion at a tip end of the capillary, and forming a wire bent portion having a cut surface smaller than a cross-section of the wire on a side of the bent wire convex portion by pressing the wire to the bent wire convex portion with the inner chamfer; and a wire cutting step comprising pulling the wire up and cutting the wire at the wire bent portion.