US 6,982,493 B2
Wedgebond pads having a nonplanar surface structure
Kevin Shawn Petrarca, Newburgh, N.Y. (US); and Richard Paul Volant, New Fairfield, Conn. (US)
Assigned to International Business Machines Corporation, Armonk, N.Y. (US)
Filed on Apr. 03, 2003, as Appl. No. 10/249,382.
Prior Publication US 2004/0195679 A1, Oct. 07, 2004
Int. Cl. H01L 23/48 (2006.01); H01L 23/52 (2006.01)
U.S. Cl. 257—784 7 Claims
OG exemplary drawing
 
1. A wedgebond pad structure comprising:
a substrate;
a metallic layer formed on the substrate;
a dielectric layer over the metallic layer, at least one through via to the metallic layer and at least a portion of the dielectric layer comprising a nonplanar dielectric structure;
a metallic bond layer conformally formed over the nonplanar structure of the dielectric layer such that the nonplanar dielectric structure is substantially reproduced in the metallic bond layer as a nonplanar metallic structure, the metallic bond layer further formed in the through via so as to contact the metallic layer, wherein the nonplanar metallic structure has a planar surface and only one curved or v-shaped feature for receiving a wedge bond wherein the surface is not coplanar with the curved or v-shaped feature.