Patent ID: 7354873
Filing Date: 2008-04-08
Classification: C23C,H01L

Abstract:
1. 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 Si—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 msec≦Rt, wherein: Pr: reaction space pressure (Pa) Ps: standard atmospheric pressure (Pa) Tr: average temperature of the reaction (K) Ts: standard temperature (K) r d: space between the silicon substrate and the upper electrode (m) F: total flow volume of the reaction gas (sccm).