Patent ID: 8808856
Filing Date: 2014-08-19
Classification: C23C,H01J,Y10T

Abstract:
1. An apparatus for producing a carbon film with a nanostructure on a surface of a substrate using plasma chemical vapor deposition, the apparatus comprising: a vacuum chamber into which a gas for carbon film production is introduced; a cylindrical member that is disposed in the vacuum chamber, has an opening in part thereof, and is configured so as to allow the disposing of a substrate therein, the substrate being not grounded and a power source having a DC power source which generates a negative DC voltage, and having a high-frequency power source which generates a high-frequency voltage, wherein the gas is introduced into the vacuum chamber and a voltage for generating a plasma is applied to the cylindrical member to thereby generate the plasma in the cylindrical member and to produce a carbon film on the surface of the substrate disposed in the cylindrical member, the cylindrical member is a coil having a first end and a second end, said first end of said cylindrical member is connected to a negative electrode of the DC power source, and said second end of said cylindrical member is in a floating state, said high-frequency power source is coupled to said cylindrical member so as to superimpose the high-frequency voltage on the negative DC voltage, and diameters of turns of the coil in a middle portion of the coil in a length-wise direction of the coil are larger than diameters of turns of the coil at both end portions of the coil.