Patent ID: 7838918

Claim:
A photoelectric conversion apparatus comprising: a semiconductor substrate; a photoelectric conversion element and a MOS transistor disposed in the semiconductor substrate; and a multilayered wiring structure including a stacking structure, wherein a plurality of wiring layers are stacked such that one or more interlayer insulation films are interposed between the wiring layers, each of the plurality of wiring layers having a plurality of wirings, wherein the photoelectric conversion apparatus includes: one of the interlayer insulation films disposed on the semiconductor substrate; a first plug, disposed in a first hole in the one of the interlayer insulation films, for connecting between active regions disposed in the semiconductor substrate, between gate electrodes of MOS transistors, or between an active region and a gate electrode of a MOS transistor, not through wiring of a wiring layer; a second plug disposed in a second hole in the one of the interlayer insulation films and electrically connected to any of the active regions disposed in the semiconductor substrate; and a wiring included in a lowermost wiring layer in the multilayered wiring structure and electrically connected to the second plug through a third plug that is connected to the second plug, and wherein a barrier metal is arranged continuously, within the multilayered wiring structure, between at least one of the one or more of the interlayer insulation films and corresponding plug and wiring portions.