Patent ID: 7919410

Claim:
A method of forming an imager device, comprising: forming a first opening in a back surface of an imager substrate comprising at least one photosensitive element and at least one electrical contact on a front surface of the imager substrate, the first opening permitting conductive coupling to a portion of a back surface of the electrical contact; forming a laminated conductive film on the back surface of the imager substrate, the laminated conductive film comprising an insulating material and a conductive film portion, wherein a portion of the insulating material is formed within the first opening, wherein at least a portion of the insulating material is interposed between the conductive film portion and the imager substrate; after forming the laminated conductive film, forming a second opening through the laminated conductive film and within the first opening, the second opening permitting conductive coupling to a portion of the back surface of the electrical contact, wherein, after the formation of the second opening, a portion of the insulating material remains within the first opening; and forming a conductive structure within the second opening, wherein the insulating material remaining within the first opening after the formation of the second opening is positioned between at least a portion of the conductive structure and the imager substrate.