Patent ID: 9209123
Filing Date: 2015-12-08
Classification: H01L

Abstract:
1. A semiconductor device comprising: a first wiring; a first interlayer insulating film formed over the first wiring; a coupling hole formed in the first interlayer insulating film and located over the first wiring; a coupling member embedded in the coupling hole and formed of an electrically conductive material; a second interlayer insulating film located over the coupling member and over the first interlayer insulating film; a wiring groove formed in the second interlayer insulating film and overlapping the coupling member in a plan view; and a second wiring embedded within the wiring groove, wherein the coupling member extends in a first direction between the first wiring and the second wiring, wherein in a cross-section perpendicular to a direction passing through the coupling member and a direction in which the second wiring extends, a center of the coupling member along a second direction perpendicular to the first direction is closer to a first side surface of the second wiring than a center of the second wiring along the second direction, and wherein at least a lower part of an overlapping region that is a region where the first side surface of the second wiring overlaps the coupling member in the direction in which the second wiring extends, has an inclination steeper than that of other portions of the side surface of the second wiring.