Patent ID: 8912658
Filing Date: 2014-12-16
Classification: H01L

Abstract:
1. An interconnect structure comprising: a dielectric layer having a conductive feature embedded therein, said conductive feature having a first top surface that is substantially coplanar with a second top surface of said dielectric layer; a metal cap layer located directly on said first top surface, wherein said metal cap layer does not substantially extend onto said second top surface; a first dielectric cap layer located directly on said second top surface, wherein said first dielectric cap layer does not substantially extend onto said first top surface and said first dielectric cap layer is thicker than said metal cap layer; and a second dielectric cap layer directly on said metal cap layer and directly on said first dielectric cap layer, wherein the metal cap layer consists of: i) a metal or ii) a combination of metals and wherein the metal cap layer has a substantially uniform composition profile.