Patent ID: 9324744
Filing Date: 2016-04-26
CPC Classification: H01L

Claim Text:
1. A solid-state image sensor comprising: a semiconductor layer; a multilayer wiring layer arranged on a side of a first face of the semiconductor layer, the multilayer wiring layer including two insulating layers and an electrically conductive layer provided between the two insulating layers; and an electrically conductive member which is arranged in the opening and in contact with the electrically conductive layer, wherein the semiconductor layer and the multilayer wiring layer include a wall portion including a first side face and a second side face, the first side face of the wall portion defines the opening which extends from a second face of the semiconductor layer to the electrically conductive layer in the multilayer wiring layer, the second face of the semiconductor layer being opposite to the first face of the semiconductor layer, and the second side face of the wall portion defines a trench which surrounds the opening and extends from the second face of the semiconductor layer into the multilayer wiring layer, the trench having a depth that is not less than a depth of the opening.