Patent ID: 9437635
Filing Date: 2016-09-06
CPC Classification: H01L

Claim Text:
1. A solid-state image sensor comprising: a semiconductor layer having a first face and a second face, a plurality of photoelectric converters being arranged in the semiconductor layer; a plurality of conductive portions arranged at a side of the first face; a plurality of lenses arranged at a side of the second face; an interlayer insulator film disposed between the plurality of conductive portions and the semiconductor layer; and a barrier metal portion disposed between a conductive portion of the plurality of conductive portions and the interlayer insulator film, wherein a surface of the conductive portion at a side of the semiconductor layer has a first region and a second region out of the first region, the first region and the second region forming a stepped shape in the surface of the conductive portion, and wherein the barrier metal portion has an opening through which the first region of the conductive portion faces the semiconductor layer through the interlayer insulator film so that a part of the conductive portion is provided in the opening, and the barrier metal portion is disposed between the second region and the interlayer insulator film.