A silicon oxide film is deposited on a substrate disposed in a substrate processing chamber. The substrate has a gap formed between adjacent raised surfaces. A liquid Si--C--O--H precursor is vaporized. A flow of the vaporized liquid Si--C--O--H precursor is provided to the substrate processing chamber. A gaseous oxidizer is also flowed to the substrate processing chamber. A deposition plasma is generated inductively from the precursor and the oxidizer in the substrate processing chamber, and the silicon oxide film is deposited over the substrate and within the gap with the deposition plasma.