US Patent 7563564 Method of forming flexible electronic circuits

A multiple layer photosensitive silver halide element having at least one sensitized photosensitive layer on each side of a support, such as a transparent flexible support, is imagewise exposed according to a desired circuit pattern and developed to form a layer of conductive track patterns from each photosensitive layer. The resulting multiple layer conductive element has application in the field of printed circuit board manufacture or as the backplane electronic element of a flexible display device.