Patent ID: 9457421
Filing Date: 2016-10-04
CPC Classification: B23K,H01L

Claim Text:
1. A wire bonding method comprising: a first bonding step of bonding a wire to a bonding target at a first bonding point of wire bonding; a continuous monitoring step of continuously applying a predetermined electrical signal between the wire held by a capillary and the bonding target to obtain a change in a capacitance value between the wire held by the capillary and the bonding target, the continuous monitoring step being performed after the first bonding step and during a period in which the wire is fed from the first bonding point to a second bonding point for the wire bonding in a second bonding step; and a premature disconnection determination step of determining that the wire is prematurely disconnected when the capacitance value decreases after the first bonding step, and of determining that the wire that has been prematurely disconnected drops down and is brought into contact with the bonding target when the capacitance value returns before the second bonding point.