Wedge bonding tools and methods of forming wire bonds
A wedge bonding tool is provided. The wedge bonding tool includes a body portion including a tip portion, the tip portion terminating at a working end of the wedge bonding tool. The tip portion includes (i) two opposing walls, and (ii) an adjoining surface between the two opposing walls. The adjoining surface includes a flat area. The two opposing walls and the flat area define a groove configured to receive a wire. The flat area has a width of at least 20% of a width of the groove at the working end.
1 . A wedge bonding tool comprising:
a body portion including a tip portion, the tip portion terminating at a working end of the wedge bonding tool,
the tip portion including (i) two opposing walls, and (ii) an adjoining surface between the two opposing walls, the adjoining surface including a flat area, the two opposing walls and the adjoining surface defining a recess surrounding the flat area, the recess exceeding a width of the adjoining surface such that the two opposing walls define part of the recess, the two opposing walls and the flat area defining a groove configured to receive a wire,
the flat area having a width of at least 20% of a width of the groove at the working end.
2 . The wedge bonding tool of claim 1 wherein at least one protrusion extends from the flat area.
3 . The wedge bonding tool of claim 1 wherein a plurality of protrusions extends from the flat area.
4 . The wedge bonding tool of claim 3 wherein each of the plurality of protrusions includes a quadrilateral shape.
5 . The wedge bonding tool of claim 1 wherein the adjoining surface includes a concave portion adjacent the flat area, the concave portion being on a feed side of the wedge bonding tool.
6 . The wedge bonding tool of claim 1 wherein the flat area is rectangular.
7 . The wedge bonding tool of claim 1 wherein the width of the flat area is at least 30% of the width of the groove at the working end.
8 . The wedge bonding tool of claim 1 wherein the width of the flat area is at least 40% of the width of the groove at the working end.
9 . A wedge bonding tool comprising:
a body portion including a tip portion, the tip portion terminating at a working end of the wedge bonding tool,
the tip portion including (i) two opposing walls, and (ii) an adjoining surface between the two opposing walls, the adjoining surface including a flat area which extends along both x-axis and y-axis, the adjoining surface defining a recess, the recess bisecting the flat area and extending into each of the two opposing walls such that a portion of the recess is defined by each of the two opposing walls, the two opposing walls and the flat area defining a groove configured to receive a wire,
the flat area having a width of at least 20% of a width of the groove at the working end.
10 . The wedge bonding tool of claim 9 wherein at least one protrusion extends from the flat area.
11 . The wedge bonding tool of claim 9 wherein a plurality of protrusions extends from the flat area.
12 . The wedge bonding tool of claim 11 wherein the plurality of protrusions includes a quadrilateral shape.
13 . The wedge bonding tool of claim 11 wherein the plurality of protrusions is a ridge extending between and joining the two opposing walls.
14 . The wedge bonding tool of claim 9 wherein the adjoining surface includes a concave portion adjacent the flat area, the concave portion being on a feed side of the wedge bonding tool.
15 . The wedge bonding tool of claim 9 wherein the width of the flat area is at least 30% of the width of the groove at the working end.
16 . The wedge bonding tool of claim 9 wherein the width of the flat area is at least 40% of the width of the groove at the working end.