Patent ID: 8889235

Claim:
A process for forming a silicon carbonitride barrier dielectric film between a dielectric film and a metal interconnect of an integrated circuit substrate, comprising the steps of: providing the integrated circuit substrate having a dielectric film; contacting the substrate with a barrier dielectric film precursor selected from the group consisting of bis(isopropylamino)vinylmethylsilane, bis(isopropylamino)divinylsilane, bis(t-butylamino)vinylmethylsilane, bis(t-butylamino)divinylsilane, bis(diethylamino)vinylmethylsilane, bis(diethylamino)divinylsilane, bis(dimethylamino)vinylmethylsilane, bis(dimethylamino)divinylsilane, bis(methylethylamino)vinylmethylsilane, bis(methylethylamino)divinylsilane, bis(isopropylamino)allylmethylsilane, bis(isopropylamino)diallylsilane, bis(t-butylamino)allylmethylsilane, bis(t-butylamino)diallylsilane, bis(diethylamino)allylmethylsilane, bis(diethylamino)diallylsilane, bis(dimethylamino)allylmethylsilane, bis(dimethylamino)diallylsilane, bis(methylethylamino)allylmethylsilane, bis(methylethylamino)diallylsilane, and mixtures thereof; and forming the silicon carbonitride barrier dielectric film under plasma enhanced chemical vapor deposition conditions, wherein the film has a C/Si ratio >0.8 and a N/Si ratio >0.2 on the integrated circuit substrate, wherein the silicon carbonitride barrier dielectric film has a density in the range of 1.7 to 2.2 g/cc, and wherein the silicon carbonitride barrier dielectric film has a K in the range of 4.0 to 4.5.