Patent ID: 7795126
Filing Date: 2010-09-14
Classification: H01L

Abstract:
1. A method for producing electrical die contact structures for integrated circuit devices, the method including the steps of: providing a plurality of integrated circuits on a semiconductor wafer having a front side and a backside, each of the integrated circuits being delineated from other integrated circuits on the wafer by a plurality of saw streets and each integrated circuit including a multiplicity of electrical contact pads with contact pad extensions that extend into the saw streets; attaching a front side protective layer to a front side surface of the wafer and wherein the electrical contact pads are electrically isolated from the contact pad extensions by a passivation material and then electrically interconnecting the contact pads and the pad extensions using an overlying bridge of conducting material; removing material from the backside of the wafer in the saw streets until a bottom surface of the contact pad extensions is exposed, thereby defining notches along edges of the integrated circuit devices; forming electrical connections on the backside of the semiconductor substrate; forming a backside metal layer such that a tail portion of the metal layer overlaps the bottom surface of one of the contact pad extensions in one of said notches, the tail portion extending along a side edge of the notch and including a bend at a bottom of the notch such that the tail portion extends from the bend in a direction substantially parallel to the pad extension forming a parallel electrical connection between said contact pad extension and said tail portion such that the contact pad extensions are electrically interconnected with electrical connections; and separating the plurality of integrated circuit devices into individual devices.