Patent ID: 7396570

Claim:
A plasma enhanced chemical vapor deposition method of forming a titanium silicide-comprising layer over a substrate, comprising: first feeding TiCl 4 and at least one silane to a substrate at or above a first volumetric ratio of TiCl 4 to silane for a first period of time, the first volumetric ratio being sufficiently high to avoid measurable deposition of titanium silicide on said substrate; and after the first feeding for the first period of time, second feeding TiCl 4 and at least one silane to said substrate at or below a second volumetric ratio of TiCl 4 to silane for a second period of time, the second volumetric ratio being lower than the first volumetric ratio, the second feeding being effective to plasma enhance chemical vapor deposit a titanium silicide-comprising layer on the substrate.