Patent ID: 6767823
Filing Date: 2004-07-27
Classification: C23C,H01L

Abstract:
A plasma enhanced chemical vapor deposition method of forming a titanium silicide comprising layer over a substrate, comprising:providing a substrate within a plasma enhanced chemical vapor deposition chamber; first feeding TiCI4 and at least one silane to the chamber at or above a first volumetric ratio of TiCI4 to silane for a first period of time, the first volumetric ratio being sufficiently high to avoid measurable deposition of titanium silicide on the substrate; and after the first feeding for the first period of time, second feeding TiCI4 and at least one silane to the chamber at or below a second volumetric ratio of TiCI4 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.