Patent ID: 6933010

Claim:
A film-manufacturing system, which comprises a cylindrical vacuum reactor provided therein with a stage for placing a substrate thereon and a gas head for introducing a mixed gas comprising a vaporized gas and a reactive gas into the vacuum reactor, the gas head being arranged in the central region on the upper face of the reactor and opposed to the stage, wherein a cylindrical sleeve member having a desired length is disposed while it comes in close contact with the side wall of the stage in such a manner that an exhaust gas is discharged from a first space formed by the gas head and the upper face of the stage without causing any convection current therein through the interstice between the sleeve member and the inner wall surface constituting the reactor and wherein the height of the stage can be established at the position at which the volume of a second space formed below the stage and connected to a vacuum discharge means is larger than that of the first space.