Patent ID: 7993951

Claim:
A method of manufacturing a photoelectric conversion device having a pixel region and a peripheral circuit region, the method comprising: a step of forming a semiconductor compound layer by causing a surface of a diffusion layer or gate electrode of a MOS transistor in the peripheral circuit region to react with a high melting point metal; a step of forming an insulating layer in the pixel region and the peripheral circuit region after the step of forming a semiconductor compound layer; a first contact hole formation step of forming a contact hole in the insulating layer to expose a diffusion layer in the pixel region; a second contact hole formation step of forming a contact hole in the insulating layer to expose the semiconductor compound layer formed in the peripheral circuit region, the second contact hole formation step being executed at a timing different from a timing of the first contact hole formation step; and a step of forming, prior to a step executed later out of the first contact hole formation step and the second contact hole formation step, a contact plug in the contact hole formed in a step executed first.