Patent ID: 9711400
Date: 2017-07-18
CPC Classifications: H01L

Claim:
1. An interconnect structure comprising: at least one interconnect metallic region of an interconnect metal or metal alloy, M1, embedded in an opening located in an interconnect dielectric material layer, wherein a topmost surface of said at least one interconnect metallic region is coplanar with a topmost surface of said interconnect dielectric material layer; an intermetallic compound containing cap located on said topmost surface of said at least one interconnect metallic region, wherein said intermetallic compound containing cap is a metal alloy including M1 and another metal, M2, wherein M2 is different from M1 and is Hf; and a dielectric capping layer located on exposed portions of said topmost surface of said interconnect dielectric material and on sidewall surfaces and a topmost surface of said intermetallic compound containing cap.