Patent ID: 6161499
Filing Date: 2000-12-19
Classification: C23C,C30B,H01J,Y10T

Abstract:
A hot filament DC discharge plasma apparatus for synthesizing a diamond film, comprising:a) a deposition chamber having a gas inlet for flowing reactant gases into said deposition chamber;b) a conducting substrate holder adapted to support a substrate having a surface on which the diamond film is to be synthesized, and means for heating and cooling said substrate holder;c) a grid electrode spaced from the surface of said substrate holder;d) a filament array electrode interposed between said grid electrode and said substrate holder, and means for resistively heating said filament array electrode; ande) means for biasing said grid electrode, said filament array electrode and said substrate holder to produce a hot filament DC discharge plasma, including means for adjusting the bias potential on said grid electrode and said filament array electrode relative to said substrate holder and each other.