Patent ID: 7718544

Claim:
A method for fabricating a semiconductor device, comprising: (a) selecting conditions for plasma reaction for depositing a silicon-containing insulation film using a diffusion coefficient of the film as a criterion for selecting the conditions such that the silicon-containing insulation film has a target diffusion coefficient between about 250 μ 2 /min and about 50 μ 2 /min as measured using isopropyl alcohol, said plasma reaction using a reaction gas comprising (i) a source gas comprising a silicon containing hydrocarbon compound containing plural cross-linkable groups, (ii) a cross linking gas, (iii) an inert gas, and (iv) an oxygen-supplying gas, wherein a flow rate of the oxygen-supplying gas is greater than 0% and no more than 25% of that of the source gas, said selection of the conditions comprising: correlating the diffusion coefficient of the film with the flow rate of the oxygen supplying gas and selecting the flow rate of the oxygen-supplying gas using the diffusion coefficient as a criterion to adjust a diffusion coefficient of the film to the target diffusion coefficient based on the correlation between the diffusion coefficient of the film and the flow rate of the oxygen-supplying gas; (b) forming on a substrate a silicon-containing insulation film having the target diffusion coefficient between about 250 μ 2 /min and about 50 μ 2 /min as measured using isopropyl alcohol, using the selected conditions; and, (c) subjecting the insulation film to an integration process to fabricate a semiconductor device.