Low dielectric constant material and method of processing by CVD

摘要

Organofluorosilicate glass films contain both organic species and inorganic fluorines, exclusive of significant amounts of fluorocarbon species. Preferred films are represented by the formula Si v O w C x H y F z . where v+w+x+y+z = 100%, v is from 10 to 35 atomic%, w is from 10 to 65 atomic% y is from 10 to 50 atomic%, x is from 1 to 30 atomic%, z is from 0.1 to 15 atomic%, and x/z is optionally greater than 0.25, wherein substantially none of the filuarine is bonded to the carbon. In one embodiment there is provided a CVD method that includes: providing a substrate within a vacuum chamber; introducing into the vacuum chamber gaseous reagents including a fluorine-providing gas, an oxygen-providing gas and at least one precursor gas selected from an organosilane and an organosiloxane; and applying energy to the gaseous reagents in the chamber to induce reaction of the gaseous reagents and to form the film on the substrate.