Pulsed carbon plasma apparatus

Details Pulsed carbon plasma apparatus Pulsed carbon plasma apparatus

2005-02-15

2005-02-15

McDonald, Rodney G. (Department: 1753)

Chemistry: electrical and wave energy

Apparatus

Vacuum arc discharge coating

C204S192380

Reexamination Certificate

active

06855237

ABSTRACT:
The present invention provides a pulsed carbon plasma apparatus to produce a diamond-like carbon coating over an extended object, the coating having a high degree of thickness uniformity achieved by scanning the plasma flow over the surface of the object. The pulsed carbon plasma apparatus of the invention comprises a carbon plasma flow scanning device having at least one pair of deflecting coils, where the deflecting coils have, in the scanning plane, a different number of turns on opposite sides. The object may be made of metal, ceramic, glass or plastic. The coatings may be used to improve life and operating performance of tools and machine parts, and as decorative coatings.

REFERENCES:
patent: 5078848 (1992-01-01), Anttila et al.
patent: 5269898 (1993-12-01), Welty
patent: 5976636 (1999-11-01), Leu et al.

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