A back end of the line (BEOL) structure of a semiconductor device is
presented. In one embodiment, the structure may include a first liner
layer disposed on an intermediate interconnect structure, the
intermediate interconnect structure having an opening disposed between
two surfaces of a dielectric material, wherein the first liner layer is
in direct contact with at least a portion of a conductive wiring material
of an underneath interconnect layer; a noble metal layer disposed on the
first liner layer at least in the opening; and a conductive wiring
material disposed on the noble metal layer, the conductive wiring
material substantially filling the opening; wherein the first liner
layer, the noble metal layer and the conductive wiring material are
coplanar with the two surfaces of the dielectric material of the
intermediate interconnect structure, and the noble metal layer includes a
different material than the first liner layer.