Patent ID: 8062707

Claim:
A method of manufacturing a gas barrier film comprising: exciting a gas containing a thin film forming gas between a first and second electrode by applying a first power source producing a high frequency electric field in the range of 3 kHz to 400 kHz with a power density in the range of 5 to 50 W/cm 2 to the first electrode and a second power source producing a high frequency electric field in the range of 800 kHz to 150 MHz with a power density in the range of 1 to 50 W/cm 2 to the second electrode under atmospheric pressure or a pressure close to the atmospheric pressure, provided that the gas contains a nitrogen gas in an amount of 50% by volume or more; and exposing a resin substrate to the excited gas so as to form at least one layer of a ceramic film on the resin substrate, wherein the density ratio Y (=ρf/ρb) satisfies 1≧Y≧0.95 and the ceramic film has a residual stress being a compression stress of 0.01 MPa or more and 100 Mpa or less, wherein ρf is the density of the ceramic film and ρb is the density of a comparative ceramic film being formed by thermal oxidation or thermal nitridation of a metal as a mother material of the ceramic film so as to being the same composition ratio of the ceramic film.