What is Cathodic Arc?
Cathodic arc is a type of physical vapor deposition that offers advantages in terms of coating adhesion, uniformity, utility on parts with 3-dimensional structure and scalability.
Cathodic arc uses low voltage combined with high currents to create electrical arc discharges inside a vacuum chamber. Unlike sputtering which uses high voltages to force ionized, inert gas to ablate a target, the gas in cathodic arc serves primarily as a carrier for electricity. Those arcs result in local superheating of the cathode (made from the material to be deposited) resulting in simultaneous evaporation and ionization. It is this combination which provides cathodic arc with its unique advantages.