Patent ID: 8765233

Claim:
A method of forming a low-carbon silicon-containing film by CVD on a substrate having trenches, comprising: introducing a process gas into a reaction chamber, said process gas consisting of: (i) a gas of a silicon-containing compound having two or more silicon atoms and three or less hydrocarbon units in its molecule and having a boiling temperature of 35° C. to 220° C., wherein the silicon-containing compound includes a Si—R—Si bond where R is nitrogen or hydrocarbon, and has two to five silicon atoms in its molecule, and (ii) at least one gas selected from the group consisting of an inert gas, gas containing nitrogen in its molecule, and gas containing silicon in its molecule other than gas (i); applying RF power to the process gas; and depositing a film on a substrate having trenches by CVD using the RF power-applied process gas wherein the substrate is maintained at a temperature such that components of the silicon-containing compound are at least partially liquidified on the substrate, thereby filling the trenches with a material constituting the film, wherein gas (i) and gas (ii) are the only gases used in the reaction chamber during film deposition process under reduced pressure, and gas (i) is selected from the group consisting of 1,4-disilanebutane, cyclotrisilazane, and 1,4,7-trisilaheptane.