Patent ID: 7393772
Filing Date: 2008-07-01
Classification: H01L,Y10T

Abstract:
1. A method of making an electrical connection to a microelectronic die, comprising: forming a copper pad in a surface of the microelectronic die; forming at least one layer of passivation material on the surface of the die and the copper pad; forming an opening in the at least one layer of passivation material to expose at least a portion of the copper pad; forming a layer of conductive material in contact with the copper pad through the opening, wherein forming the layer of conductive material comprises forming a single layer of titanium; and attaching a bond wire to a top surface of the layer of conductive material to form a wirebond assembly, wherein the layer of conductive material includes a material to provide a stable contact between the bond wire and the copper pad in at least one of an oxidizing environment and an environment with temperatures up to at least about 350.degree. C.