Patent ID: 8716054

Claim:
A method of fabricating an image sensor having a pixel region and a logic region, comprising: forming a photodiode in a substrate at the pixel region; forming a first interlayer insulating layer at least one of on and over the substrate; forming a first stop film at least one of on and over the first interlayer insulating layer; forming an insulating film at least one of on and over the first stop film; forming a second stop film at least one of on and over the insulating film; forming at least one trench that exposes the first stop film by selective etching of the second stop film and the insulating film positioned at the pixel region; forming conductive material at least one of on and over the second stop film to fill the at least one trench; forming a zero wiring layer in the at least one trench by planarizing the conductive material until the second stop film is exposed; forming a recess matched to the photodiode by selective etching at least one of said at least one third interlayer insulating layer, the second interlayer insulating layer, the second stop film, the insulating film at the pixel region until the first stop film is exposed; and forming a light guide layer by filling an insulating material having a refractive index different from the refractive index of at least one of said at least one third interlayer insulating layer, the second interlayer insulating layer, and the insulating film formed in the recess.