Patent ID: 8231046

Claim:
A wire bonding method comprising: bonding a wire in order at a first bonding point and a second bonding point; raising a capillary, through which the wire is inserted, on the second bonding point; cutting the wire by closing a damper provided above the capillary in response to the capillary reaching a prescribed height; measuring a load incurred on the wire at a time of cutting of the wire; calculating a prescribed optimum breaking load range so that an upper limit value of the optimum breaking load range becomes a limit value for restricting occurrence of a wire deformation; detecting whether the load incurred on the wire at the time of cutting the wire is within the optimum breaking load range; and determining whether to continue the bonding based on a result of the detecting, wherein in response to determining that bonding is to be continued, the optimum breaking load range is held, and a determination is made regarding whether a second load incurred on the wire at a time of cutting the wire after a next bonding is within the optimum breaking load range.