Patent ID: 7354873

Claim:
A method for forming an insulation film on a semiconductor substrate by plasma reaction, comprising the steps of: vaporizing a silicon-containing hydrocarbon compound to provide a source gas, said silicon-containing hydrocarbon compound comprising a Siâ€”O bond in a molecule; introducing a reaction gas comprising the source gas and a carrier gas into a reaction space for plasma CVD processing wherein a semiconductor substrate is placed; and forming an insulation film constituted by Si, O, H, and optionally C or N on the substrate by plasma reaction using a combination of low-frequency RF power and high-frequency RF power in the reaction space, wherein the plasma reaction is activated while controlling the flow of the reaction gas to lengthen a residence time, Rt, of the reaction gas in the reaction space, wherein 100 msecâ‰¦Rt, Rt[s ]=9.42Ã—10 7 ( PrÂ·Ts/PsÂ·Tr ) r w 2 d/F wherein: Pr: reaction space pressure (Pa) Ps: standard atmospheric pressure (Pa) Tr: average temperature of the reaction (K) Ts: standard temperature (K) r w : radius of the silicon substrate (m) d: space between the silicon substrate and the upper electrode (m) F: total flow volume of the reaction gas (sccm).