Patent ID: 6399151
Filing Date: 2002-06-04
Classification: H01J

Abstract:
A diamond film depositing method by plasma-assisted CVD comprising the steps of:applying a DC or DC pulse voltage with SMPS to a cathode and an anode which are facing each other and disposed inside a vacuum chamber, wherein the cathode and the anode are of disk-shape, the cathode being comprised of at least one of tantalum, molybdenum and tungsten, and a substrate is disposed on the anode; generating a plasma between the cathode and the substrate by supplying a reactive gas including hydrocarbon gas therebetween; and depositing a diamond film on the substrate while maintaining the temperature of cathode greater than 950Â° C. and below 1400Â° C. and maintaining the pressure of the reactive gas in the range of 100-160 Torr. wherein the cathode is fixed by a holder which includes a central fixing bar disposed at a center of an upper surface of the cathode, plural edge fixing disposed at an edge of the upper surface of the cathode at regular intervals, and a cooling line formed inside the holder, and the temperature of the cathode is controlled by varying contact spacing between the cathode and the holder.