Patent ID: 7189664

Claim:
A chemical vapor deposition method for producing hydrogenated silicon oxycarbide films comprising introducing a reactive gas mixture comprising (i) a cyclic silane compound selected from the group consisting of silicon-containing cyclobutanes, silicon-containing cyclopentanes, silicon-containing cyclohexanes, sila-5-spiro[4,4]nona-2,7-diene, and bi-cyclic compounds wherein said cyclic silane compound has one or more silicon atoms contained within at least one ring structure that does not include an oxygen atom in the ring structure; and (ii) an oxygen providing gas into a deposition chamber containing a substrate and inducing a reaction between the cyclic silane compound and oxygen providing gas at a temperature of 25° C. to 500° C.; wherein there is 0.1 to less than 10 volume parts oxygen providing gas per volume part of cyclic silane compound present during the reaction to provide a film on the substrate comprising hydrogen, silicon, carbon and oxygen having a dielectric constant in the range of 2.0 to 3.2.