US PATENT SUBCLASS 427 / 569
.~ Plasma (e.g., corona, glow discharge, cold plasma, etc.)

Current as of: June, 1999
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427 /   HD   COATING PROCESSES

457  DF  DIRECT APPLICATION OF ELECTRICAL, MAGNETIC, WAVE, OR PARTICULATE ENERGY {15}
569.~ Plasma (e.g., corona, glow discharge, cold plasma, etc.) {5}
570  DF  .~.~> Utilizing plasma with other nonionizing energy sources {4}
575  DF  .~.~> Generated by microwave (i.e., 1mm to 1m)
576  DF  .~.~> Metal, metal alloy, or metal oxide coating
577  DF  .~.~> Inorganic carbon containing coating material, not as steel (e.g., carbide, etc.)
578  DF  .~.~> Silicon containing coating material {1}

DEFINITION

Classification: 427/569

Plasma (e.g., corona, glow discharge, cold plasma, etc.):

(under subclass 457) Processes wherein a wholly or partially ionized gas, which has an activating source, is responsible for the deposition of the coating material.

(1) Note. A plasma consists of a wholly or partially ionized gas composed of ions, electrons, and neutral particles. The concentration of negatively and positively charged carriers are approximately equal.

(2) Note. Processes utilizing corona, glow discharge, and cold plasma are found here, when utilized to cause disassociation or ionization of the vaporous reactants allowing a coating material (reaction product) to deposit on a substrate.

(3) Note. In a cold plasma the temperature of the electrons is high wherein the temperature of the ions is relatively low, possibly room temperature.