Patent ID: 7410915

Claim:
A method of forming a hydrocarbon-containing polymer film on a semiconductor substrate by a capacitively-coupled plasma CVD apparatus, which comprises: vaporizing a hydrocarbon-containing liquid monomer (C α H β X γ , wherein α and β are natural numbers of 5 or more; γ is an integer including zero; X is O, N or F) having a boiling point of about 20° C. to about 350° C. which is not substituted by a vinyl group or an acetylene group; introducing said vaporized gas and CO 2 gas or H 2 gas into a CVD reaction chamber inside which a substrate is placed; and forming a hydrocarbon-containing polymer film on said substrate by plasma polymerization of said gas and controlling an extinction coefficient at 193 nm and a mechanical hardness of the forming hydrocarbon-containing polymer film at 0.38 or less and 0.5 GPa or higher, respectively, as a function of a flow rate of the CO 2 gas or H 2 gas.