Patent ID: 9601539
Date: 2017-03-21
CPC Classifications: H01L

Claim:
1. An imaging device, comprising: a semiconductor layer having a first side as a light-incident side and a second side opposite to the first side, the semiconductor layer including a photoelectric conversion element; a separation region between the photoelectric conversion element and an adjacent photoelectric conversion element; a first film disposed adjacent to the first side of the semiconductor layer; an insulating film disposed on the first film; a light-shielding portion located on the insulating film at an upper part of the separation region; a second film located on the first film and the light-shielding portion; a color filter disposed above the second film; and a wiring layer disposed adjacent to the second side of the semiconductor layer; wherein, the first film is a hafnium oxide film, the second film comprises a nitride element, the insulating film and the light-shielding portion are surrounded by the first film and the second film in a cross-section view, and a surface of the second film that is furthest from the first film has a concave shape from a viewpoint of the first film that corresponds with the light-shielding portion and the insulating film in the cross-section view.