Patent ID: 9425142
Filing Date: 2016-08-23
CPC Classification: H01L

Claim Text:
1. A semiconductor device, comprising: a bonded substrate having a first conductive layer and a second conductive layer arranged deeper than the first conductive layer, wherein the bonded substrate includes a first substrate including the first conductive layer and a second substrate including the second conductive layer; an insulating film; a large-diameter concave portion having, on a main side of the bonded substrate, an opening sized to overlap at least a part of an interconnect of the first conductive layer and at least a part of an interconnect of the second conductive layer in a plane section of the bonded substrate, wherein the large-diameter concave portion includes a first step-like portion and a second step-like portion; a small-diameter concave portion extended from the large-diameter concave portion; a conductive member provided in a connection hole made up of the large and small-diameter concave portions, wherein the first step-like portion is electrically connected to at least a portion of the first conductive layer and the second step-like portion is connected solely to a portion of the insulating film, and wherein the small-diameter concave portion is electrically connected to the second conductive layer.