Patent ID: 8304278

Claim:
A manufacturing method of a photoelectric conversion apparatus that includes a semiconductor substrate, a photoelectric conversion element and a MOS transistor disposed in the semiconductor substrate, and a multilayered wiring structure including a stacking of a plurality of wiring layers having a plurality of wirings and interlayer insulation films mutually isolating the wiring layers, wherein the manufacturing method comprises steps of: forming a gate electrode of the MOS transistor, and a plurality of active regions; forming a first interlayer insulation film on the semiconductor substrate; forming a first hole in the first interlayer insulation film; forming a metal film in the first hole, to form a first plug mutually connecting between the active regions, between gate electrodes of a plurality of MOS transistors, or between an active region and the gate electrode of the MOS transistor; forming a second hole in the first interlayer insulation film; forming a metal film in the second hole, to form a second plug connected electrically to any of the active regions; forming a second interlayer insulation film covering the first and second plugs; and forming a dual damascene structure in the second interlayer insulation film by a dual damascene process, the dual damascene structure being connected to the second plug.