Patent ID: 8981275
Filing Date: 2015-03-17
Classification: H01L

Abstract:
1. A solid-state image pickup device having a plurality of pixels integrated on a light-receiving surface, said device comprising: photodiodes which are disposed in pixel regions serving as the light-receiving surface of a semiconductor substrate; one or more insulating films, wherein at least one of the one or more insulating films is disposed on the semiconductor substrate and covering the photodiodes; one or more diffusion-preventing films disposed on at least one of the one or more insulating films; concave portions disposed in portions of the one or more insulating films above the photodiodes, the concave portions having bottom surfaces that are defined by portions of a first diffusion-preventing film of the one or more diffusion-preventing films; a passivation film which covers inner walls of the concave portions and entire bottom surfaces of the concave portions such that the passivation film is in contact with the first diffusion-preventing film at the bottom surfaces of the concave portions; wiring layers embedded in the one or more insulating films, wherein the wiring layers are disposed in the one or more insulating films in such a way as to form a mesh structure surrounding the concave portions, wherein the wiring layers and the insulating films are vertically alternatively laminated, wherein at least two of the wiring layers are embedded in an insulating film disposed directly below the first diffusion-preventing film and above the at least one of the one or more insulating films disposed on the semiconductor substrate, wherein at least two of the wiring layers are perpendicular to the at least two of the wiring layers embedded in the insulating film disposed directly below the first diffusion-preventing film and wherein at least a portion of the at least two of the wiring layers embedded in the insulating film disposed directly below the first diffusion-preventing film overlap at least one of the photodiodes; and a core layer filling the concave portions.