Patent ID: 8048710

Claim:
A manufacturing method of a photoelectric conversion device having a plurality of photoreceiving portions provided in a substrate, wherein the method comprises steps of: forming a first interlayer film so as to cover at least a whole surface of a photoreceiving portion; forming a second interlayer film of a lower refractive index rather than the first interlayer film over the first interlayer film; etching the second interlayer film for a time period calculated by dividing a thickness of the second interlayer film by an etching rate thereof, to form a hole penetrating through the second interlayer film and to expose through the hole a part of the first interlayer film corresponding to the photoreceiving portion, such that the part of the first interlayer film forms a bottom of the hole; and burying in the hole a same material as that of the first interlayer film.