Patent ID: 6917108

Claim:
An interconnect structure formed on a substrate, the structure comprising: a first dielectric layer overlying the substrate, wherein said first dielectric layer is formed of SiCOH; a first hardmask layer on said first dielectric layer, said first hardmask layer having a top surface; at least one conductive via embedded in said first dielectric layer and said first hardmask layer; a via-level layer on said first hardmask layer; a second dielectric layer on said via-level cap layer, wherein said second dielectric layer is formed of a material different from said first dielectric layer and said second dielectric layer is formed of a polymeric thermoset material; a second hardmask layer on said second dielectric layer, said second hardmask layer having a top surface; and at least one conductive line embedded in said via-level cap layer, said second dielectric layer and said second hardmask layer, said conductive line having a top surface co-planar with the top surface of said second hardmask layer.