Microwave enhanced CVD method for coating plastic with carbon fi

Details Microwave enhanced CVD method for coating plastic with carbon fi Microwave enhanced CVD method for coating plastic with carbon fi

1994-09-28

1997-02-11

King, Roy V.

Coating processes

Direct application of electrical, magnetic, wave, or...

Plasma

427575, 427571, 427249, 427122, B05D 306, C23C 1600

Patent

active

056018835

ABSTRACT:
A microwave enhanced chemical vapor deposition method is provided for coating plastic articles with crystalline carbon films. First, a reactive gas including hydrogen gas and a carbon containing raw material gas is introduced into a reaction chamber. Next, a magnetic field is established in the reaction chamber. Microwaves are next introduced into the chamber to create a cyclotron resonance in order to form a plasma of carbon and hydrogen containing gas. The carbon containing plasma deposits a coating of a crystalline and amorphous carbon on a substrate placed within the reaction chamber, while the hydrogen plasma simultaneously etches away the amorphous carbon, thereby leaving only crystalline carbon. The method is particularly adapted for the deposition of crystalline carbon films on plastic materials, as the substrate is not required to be heated in order to receive a layer of crystalline carbon.

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