Patent ID: 9646932
Date: 2017-05-09
CPC Classifications: H01L

Claim:
1. A semiconductor structure, comprising: a dielectric material layer consisting of a dielectric material disposed over a semiconductor substrate; first metal features embedded in the dielectric material layer, wherein a surface of the first metal features facing away from the semiconductor substrate is substantially co-planar with a surface of the dielectric material layer facing away from the semiconductor substrate; a barrier layer interposed between the dielectric material layer and each of the first metal features, the barrier layer extending along a bottom and sidewalls of each of the first metal features; a stop layer comprising an electrically conductive material formed on top of each of the first metal features and on top of the barrier layer of each of the first metal features, the stop layer not extending substantially over the dielectric material layer; and second metal features overlying and electrically connected to the stop layer, wherein at least one second metal feature physically contacts the dielectric material layer.