Patent ID: 8716055

Claim:
A fabrication method of a photoelectric conversion device, the method comprising: forming a film on a substrate to cover a photoelectric conversion element and a transistor; forming a first portion and a side wall for a lightly doped drain (LDD) structure of the transistor from the film by etching the film, so that the first portion is positioned on at least a part of a light receiving surface of the photoelectric conversion element; forming a first insulating layer on the substrate so that the first insulating layer covers the first portion, the first insulating layer having a refractive index lower than a refractive index of the first portion; forming a wiring layer on the first insulating layer; forming a second insulating layer on the first insulating layer to cover the wiring layer; forming a well-shaped portion by etching at least the second insulating layer, so that the first portion is positioned between the light receiving surface and the well-shaped portion in a direction vertical to the light receiving surface; and forming a second portion by embedding a material in the well-shaped portion, so that the first portion is positioned between the light receiving surface and the second portion in the direction vertical to the light receiving surface, the material having a refractive index higher than refractive indexes of the first and second insulating layers.