Patent ID: 7679091

Claim:
A semiconductor device comprising: a photoelectric conversion layer formed over a substrate; an amplifier circuit including at least two thin film transistors, wherein the amplifier circuit is formed over the substrate and is configured to amplify output current of the photoelectric conversion layer; a first interlayer insulating film formed over the photoelectric conversion layer and the amplifier circuit; a first electrode formed over the photoelectric conversion layer and the first interlayer insulating film, wherein the first electrode is electrically connected to the photoelectric conversion layer; a second interlayer insulating film formed over the first interlayer insulating film, wherein the second interlayer insulting film overlaps the amplifier circuit and has an opening that reaches the first electrode; a second electrode formed in the opening, wherein the second electrode is electrically connected to the first electrode; and a bonding layer formed over the second electrode, wherein the bonding layer overlaps the second interlayer insulating film and the second electrode, wherein the bonding layer contains a metal which is capable of forming an alloy with solder.