Patent ID: 8470720

Claim:
A film forming method comprising: supporting a plurality of substrates to be vertically spaced apart from one another in a substrate-supporting container received in a film forming container; supplying a material monomer toward the substrates through a supplier comprising a straight pipe portion provided vertically along the vertically spaced-apart substrates, the straight pipe portion having gas ejection holes, through which the material monomer is ejected, formed at predetermined intervals in a wall of the straight pipe portion toward the substrate-supporting container; heating a wall surface of the film forming container at a temperature which is equal to or higher than a vaporization temperature of the material monomer and is higher than a thermal polymerization reaction temperature by using an external heater provided outside the film forming container and along the wall surface of the film forming container to thereby prevent the material monomer from adhering to the wall surface of the film forming container; heating the substrates to the thermal polymerization reaction temperature of the material monomer by using an internal heater disposed inside the film forming container, and vertically along the vertically spaced-apart substrates and near the substrate-supporting container to form an organic film on the substrates through thermal polymerization; and holding a space between the external heater and the internal heater at a depressurized state, wherein the supplier is disposed between the external heater and the internal heater inside the film forming container.