Patent ID: 8772933

Claim:
A structure, comprising: a lower dielectric layer having a lower trench filled with a lower conductive layer; a lower cap layer formed on the lower dielectric layer; a planarized dielectric layer, formed on the lower cap layer, having an upper trench; an upper conductive layer formed in the upper trench of the planarized dielectric layer, a top surface of the upper conductive layer being at a coplanar level as a top surface of the planarized dielectric layer; a via aligned with the lower trench and structured to connect the upper trench with the lower trench, the via being formed through the planarized dielectric is layer and the lower cap layer into the lower conductive layer; a liner completely lining sidewalls and a bottom of the upper trench and the via, wherein the liner extends through the lower cap layer into and in physical contact with the lower conductive layer, and a bottom surface of a bottom portion of the liner is non-planar and below a top surface of the lower dielectric layer; a sacrificial layer formed selective to an exposed surface of the planarized dielectric layer; a cap layer being formed on the conductive layer to prevent migration, the planarized dielectric layer being devoid of the cap layer, and the cap layer being in physical contact with the upper conductive layer; and a plurality of isolated deposits of a nucleated cap material formed on the sacrificial material, wherein the nucleated cap material comprises a same material as the cap layer.