Patent ID: 7888273
Filing Date: 2011-02-15
Classification: H01L

Abstract:
1. A method of filling a gap on a substrate with density gradient-free dielectric film, comprising: a) providing a substrate having a gap to chamber, said gap having a depth d; b) forming a first portion of a dielectric film in the gap such that the gap is partially filled about equal to or less than a critical thickness, said critical thickness less than depth d; c) densifying the first portion of the film such that it is substantially density gradient-free and removing Si—H bonds from the first portion of the film; d) after densifying the first portion of the film, forming a second portion of the dielectric film in the gap, the thickness of the second portion about equal to or less than the critical thickness; and e) densifying the second portion of the film such that it is substantially density gradient-free and removing Si—H bonds from the second portion of the film; wherein (b) and (d) comprise introducing process gases comprising a silicon-containing precursor and an oxidant to a reaction chamber and exposing the substrate to the process gas under conditions such that a condensed flowable film forms on the substrate surface and partially fills the gap.