Patent ID: 7088003
Filing Date: 2006-08-08
Classification: H01L,Y10T

Abstract:
1. A back end of the line (BEOL) interconnect structure comprising: (a) an ultralow k (ULK) dielectric, having a dielectric constant of up to about 3, and conductive metal features provided on a substrate; (b) a liner barrier layer between said ULK dielectric and said conductive metal features; and (c) a thin dielectric layer (TDL), having a thickness of up to about 5 nanometers, between the liner barrier layer and the ULK dielectric, wherein the TDL comprises a dense dielectric film having hermetic barrier capability, said film comprising a different material than the material of the ULK dielectric, wherein said material comprises at least one material selected from the group consisting of: (i) materials of formula: (ii) materials of formula: (iii) materials of formula: wherein x ranges from about 0.22 to about 0.32, w ranges from about 0.15 to about 0.3, y ranges from about 0.3 to about 0.5, and z ranges from 0 to about 0.3.