Patent ID: 7459404

Claim:
A method for processing a substrate, comprising: positioning the substrate in a processing chamber, wherein the substrate has a barrier layer comprising at least silicon and carbon; introducing a pretreatment gas into the processing chamber, wherein the pretreatment gas comprises an oxidizing gas, an inert gas, or combinations thereof; generating a plasma of the pretreatment gas to modify a surface of the barrier layer; introducing an organosilicon compound and an oxidizing gas at a first ratio of organosilicon compound to oxidizing gas; depositing a first dielectric layer on the substrate, wherein the dielectric layer comprises silicon, oxygen, and carbon; introducing the organosilicon compound and the oxidizing gas at a second ratio of organosilicon compound to oxidizing gas smaller than the first ratio into the processing chamber; and generating a plasma of oxidizing gas and the organosilicon compound to form an initiation layer on the barrier layer.