Patent ID: 7947601

Claim:
A method of manufacturing a microelectronic imager having a substrate, an imager sensor located at a first side of the substrate, integrated circuitry coupled to the image sensor, and a plurality of bond-pads at the first side of the substrate that are electrically coupled to the integrated circuitry, the method comprising: forming a redistribution structure having through-substrate interconnects and traces electrically coupled to the through-substrate interconnects, the through-substrate interconnects extending from corresponding bond-pads to a second side of the substrate and the traces extending over the second side of the substrate, and the second side of the substrate being opposite the first side of the substrate; disposing a first film over the traces, wherein the first film comprises a substantially non-photoreactive radiation blocking material; photo-patterning a second film of a photoreactive material on the first film to have apertures in the second film in alignment with ball-pad portions of the corresponding traces, the apertures in the second film exposing a portion of the first film; and etching openings through the first film in alignment with and through the apertures to expose the ball-pad portions of the traces.