Patent ID: 6622903
Filing Date: 2003-09-23
Classification: B23K,H01L

Abstract:
A method for producing a ball bump on a workpiece comprising the steps of:providing a capillary having a passageway through said capillary and an opening from said passageway out of said capillary; positioning a wire in said passageway and extending an end of said wire from said opening, wherein a ball is positioned on said end; positioning said capillary proximal to a working surface on a workpiece and positioning said ball on a bond site on said working surface; applying a force against said ball in a direction of said bond site with said capillary to transform said ball to a ball bump; displacing said capillary in a first direction away from said ball bump to detach said wire from said ball bump and form a residual wire tail extending from said ball bump; and displacing said capillary in a second direction across said ball bump to engage said residual wire tail and return said residual wire tail to said ball bump.