Electrical and reliability performances of nitrogen-incorporated silicon carbide dielectric by chemical vapor deposition J.Multilayered metal capping barrier including CuSiN, for sub-65 -nm technology nodesThe effect of interlevel dielectric on the critical tensile stress to void nucleation for the reliability of Cu interconnectsThe physical, electrical, and reliability characteristics of various Copper ͑Cu͒ barrier films, including SiC, SiCN, SiCO, SiCNO, and SiN, were investigated. The experimental results indicate that the SiN film is the best barrier film against Cu diffusion, adheres strongly to Cu film, and exhibits reliable electromigration ͑EM͒ performance, but its dielectric constant is too high. Nitrogen-doped or oxygen-doped silicon carbide films ͑SiCN or SiCO͒ have a lower dielectric constant, but at the cost of reduced reliability. SiCNO film that is doped with both nitrogen and oxygen exhibits more reliable EM and stress-migration with a comparable physical and electrical performance to that of the SiN film.