Patent ID: 7621436

Claim:
A wire bonding method for connecting a wire passing through a capillary between a first bonding point and a second bonding point with a use of said capillary, said method comprising, in the order stated, the steps of: opening a clamper and executing a first bonding of a ball preformed on a tip end of the wire of said capillary onto the first bonding point, to thereby form a pressure-bonded ball; moving said capillary vertically and horizontally while carrying out loop control; executing crush bonding the wire to the vicinity of the top of the pressure bonded ball on the first bonding point, to thereby form a wire bonding part; moving said capillary above a second bonding point for looping the crushed bonding part to the second bonding point; forming a thin part in the wire by descending said capillary from above the second bonding point and pressing the wire at a lower end of said capillary against the second bonding point; closing the clamper and ascending said capillary together with the thin part in the wire; forming a linear wire portion in the wire by pulling the first-bonded wire to move the capillary in a substantially horizontal direction and in a direction away from the first bonding point toward the second bonding point; breaking the linear wire portion at the thin part in the wire by moving further said capillary in a substantially horizontal direction and in the direction away from the first bonding point toward the second bonding point, to thereby form a wire tip end part at a tip end of said capillary; and executing a second bonding the wire tip end part of said capillary onto the second bonding point during pressing the thin part formed at the end of the linear wire portion, by use of said capillary, onto the second bonding point.