ABSTRACT
Direct Current (DC) discharge can be used primarily for cathodic polymerization using the substrate metal as the cathode. Since deposition E (deposition on electrode) is around 80%, the cathodic polymerization is a great advantage, but it should be recognized that the cathodic polymerization is meant to be a short-term batch operation for nanofilm coating of the cathode because the thicker deposition of dielectric material on the cathode extinguishes the discharge. In the same vein, the attempt to utilize deposition G (deposition in luminous gas phase) is not warranted. Plasma polymerization coatings by high-frequency (HF), e.g., 40 kHz, and radio frequency (RF) discharge are primarily used for coating of dielectric substrate placed in luminous gas phase. The basic characteristics of these three types of glow discharges should be well understood in order to permit selection of the right discharge for a specific aim of plasma polymerization coating.
