Patent ID: 7772133

Claim:
An oxide film forming method comprising: (a) supplying alternately a material gas containing an organic silicon having a Si (silicon)-O (oxygen) bond or a Si (silicon)-C (carbon) bond or an organic metal having a metal element-oxygen bond or a metal element-carbon bond and an ozone containing gas to a substrate to form an oxide film on a surface of the substrate, wherein when one silicon atom is included in the material gas, an introduction pressure of the material gas at a cycle of supplying alternately the material gas and the ozone containing gas is in a range from 0.1 Pa to 100 Pa, and wherein where a number n of silicon atoms are included in the material gas, the introduction pressure of the material gas at a cycle of supplying alternately the material gas and the ozone containing gas is in 1/n of said range of the case where one silicon atom is included in the material gas; (b) adjusting a temperature of the substrate in a range from a room temperature to 400° C.; and (c) adjusting a concentration of ozone of the ozone containing gas in a range from 0.1 vol % to 100 vol %.