Cathode for generating a plasma

摘要

A cathode for use in a glow discharge chamber. A top surface electrode is adapted to provide a substantially uniform distribution of reaction gases at the active surface of an overlying substrate as it advances through the chamber. A plurality of baffles within the cathode creates equal path lengths for reaction gases from their source to the surface electrode and from the surface electrode to a vacuum. The electrode is electrically insulated from a plurality of gas exits so that the generation of plasma is confined solely to a region between the electrode and the active surface of the substrate.