Lead frame wire bonding clamp member
View Patent ↗A clamp member or device includes a clamping portion with a rigid portion from which extend a number of independently flexible clamp fingers for contacting and clamping lead frame leads. The flexible clamp fingers have pivot points for pivoting about. The pivot points are provided integrally with the rigid portion of the clamping portion so that the fingers can flex independently of each other. The member is made from a single piece of machined steel.
1. A clamp member for clamping leads of a semiconductor device lead fame, comprising: a clamping portion having a rigid portion and a plurality of independently flexible clamp fingers extending from the rigid portion for contacting and clamping said leads, wherein the flexible clamp fingers have pivot points for pivoting about and adjusting to clamp leads of varying thicknesses, which are provided integrally with the rigid portion.
2. A clamp member according to claim 1 , wherein the rigid portion and pivot points are provided in a unitary piece of metal.
3. A clamp member according to claim 1 , wherein the flexible clamp fingers and pivot points are provided integrally with the rigid portion.
4. A clamp member according to claim 1 , wherein the rigid portion is thicker than the fingers.
5. A clamp member according to claim 4 , wherein the fingers are provided in a recess in the clamping portion, which is edged by the rigid portion.
6. A clamp member according to claim 1 , wherein the termination point of each of one or more of the plurality of fingers, where the one or more fingers terminate, is at the rigid portion, and coincides with the pivot point for said one or more fingers.
7. A clamp member for clamping leads of a semiconductor device lead frame, comprising a clamping portion having a rigid portion and plurality of independently flexible clamp fingers extending from the rigid portion for contacting and clamping said leads, wherein the flexible clamp fingers have pivot points for pivoting about, which are provided integrally with the rigid portion, wherein the pivot points are misaligned.
8. A clamp member according to claim 7 , wherein said plurality of clamp fingers comprises at least three clamp fingers and the pivot points of no three adjacent clamp fingers lie in a straight line.
9. A clamp member according to claim 7 , wherein the pivot points do not all lie on an ellipse.
10. A clamp member according to claim 7 , wherein said fingers are of varying sizes and shapes.
11. A clamp member according to claim 1 , wherein at least one of said fingers is bent along its length.
12. A clamp member according to claim 1 , wherein said fingers extend in the same plane or at least the majority of their lengths, each with a lead contact portion extending out of said plane at its end, with individual lead contact portions extending different amounts out of said plane.
13. A clamp member according to claim 1 , further comprising mounting means connected to the clamping portion for securing the clamp member to support structure.