Patent ID: 8016182

Claim:
A method of wire bonding between a first bonding point and a second bonding point to electrically connect a pad on a semiconductor chip to a lead frame to provide a final wiring configuration of a low profile wire connection with one or more unbonded folded loops extending upward from the second bonding point, comprising the steps of: (a) bonding a wire to the first bonding point, wherein the first bonding point is located on the pad of the semiconductor chip; (b) then forming a first wire loop extending from the first bonding point to the second bonding point by performing loop control involving a vertical or horizontal movement of a capillary or a motion of the capillary combining both wherein the capillary passes through at least one point which has been set; (c) thereafter bonding the wire to the second bonding point, wherein the second bonding point is located on a lead of the lead frame; (d) then forming an additional second wire loop smaller than the first wire loop by delivering the wire while performing loop control involving a vertical and horizontal movement of the capillary wherein the capillary passes through at least another point which has been set and includes, vertically raising the capillary to a first point while delivering the wire, then horizontally moving the capillary in the direction toward the first bonding point to a second point, thereafter vertically raising the capillary to a third point while delivering the wire, and subsequently horizontally moving the capillary to a fourth point across the second bonding point; folding the wire between the third point and the fourth point to form a second loop and crushing a portion of the wire extending from the second wire loop on one side of the second bonding point; wherein the second wire loop is formed to have a folded portion located on a side of the second bonding point nearer to the first bonding point; and (e) subsequently performing a third bonding of the crushed end of the wire extending from the second wire loop in the vicinity of the second bonding point so that the second wire loop is formed to have a folded unbonded portion extending between the second bonding point and the third bonding point with a vertex of the second wire loop offset from the third bonding point, whereby the total bonding area adjacent the second bonding point is enlarged.