Patent ID: 7598183

Claim:
A method of processing a substrate, comprising: delivering a first gas mixture comprising a first organosilicon compound, an oxidizing gas, and one or more hydrocarbon compounds having at least one cyclic group into a chamber; depositing a first low dielectric constant film on the substrate in the presence of RF power; turning off the RF power after the first low dielectric constant film is deposited; curing the first low dielectric constant film; delivering a second gas mixture comprising a second organosilicon compound and a second oxidizing gas into the chamber; depositing a second low dielectric constant film on the first low dielectric constant film in the presence of RF power; turning off the RF power after the second low dielectric constant film is deposited; increasing a flow rate of the second oxidizing gas into the chamber; decreasing a flow rate of the second organosilicon compound into the chamber; and depositing an oxide rich cap on the second low dielectric constant film.