Patent ID: 7749892
Filing Date: 2010-07-06
Classification: H01L

Abstract:
1. An interconnect comprising: a metallic conductor having both a top surface and a lower surface; a cap formed on said top surface of said metallic conductor with said cap being formed of laminated films with said laminated films including: an Ultra-Violet (UV) blocking film; a diffusion barrier film comprising SiCNH in a covalently bonded tri-dimensional network with a dielectric constant of less than 6; said UV blocking film comprises a UV blocking high band gap film selected from the group consisting of nitrided carbon (CNx), boronitride, silicon boronitride, carbon boronitride, silicon carbon boronitride, and silicon carbon films adapted to be deposited in a Chemical Vapor Deposition (CVD) chamber, and films with lower band gap, but better mechanical, electrical, and Cu diffusion properties nitrided carbon (CN the SiCNH dielectric material comprises between about 5 and about 40, atomic percent of Si; between about 5 and about 50 atomic percent of C; between 0 and about 50 atomic percent of N; and between about 10 and about 55 atomic percent of H with molecular scale voids comprising nanometer-sized pores therein between about 0.3 to about 10 nanometers in diameter; with the nanometer-sized pores occupying between about 0.5% and about 50% of material volume; and the films of the cap have a composite dielectric constant (k) with a value range of k less than 7 and greater than 3 (3<k<7).