Patent ID: 7025247

Claim:
A wire bonding method in which primary bonding is performed on a first conductor, and then secondary bonding is performed on a second conductor, thus wire-bonding between said first conductor and second conductor, said method comprising the ordered steps of: forming a ball on an end of a wire extending through a through-hole in a capillary; forming a bump by pressing said ball of said wire onto said second conductor with said capillary until said bump is formed with a portion of said ball on said wire rising into said through-hole in said capillary, raising said capillary to a height that is equal to or lower than a height of said portion of said ball that rises into said through-hole of said capillary during formation of said bump, moving said capillary in a direction opposite from said first conductor, lowering said capillary so as to form an inclined wedge on said bump, cutting said wire, performing said primary bonding on said first conductor, and making a loop with said wire with respect to said bump from said first conductor, thus performing said secondary bonding on said inclined wedge on said bump.