Coating processes – Electrical product produced – Integrated circuit – printed circuit – or circuit board
Patent
1979-11-26
1982-05-04
Newsome, John H.
Coating processes
Electrical product produced
Integrated circuit, printed circuit, or circuit board
219121P, B05D 108
Patent
active
043282571
ABSTRACT:
Uniform protective coatings are deposited on components with a high strength bond by utilizing a supersonic plasma stream and a transferred arc system of selectively reversible polarity. By maintaining plasma stream velocity at a sufficiently high Mach number, and using stream temperatures and static pressures which establish a shock pattern characteristic that diffuses the arc, the workpiece is made cathodic relative to the plasma gun at predetermined intervals. This creates a sputtering effect in which electrons and atoms are ejected from the workpiece despite the impacting plasma flow and the ambient pressure level. This sputtering action is undertaken to clean the workpiece once it is sufficiently heated and to cause intermingling of molecules of the substrate material with molecules of a deposition powder injected into the plasma flow. This preparatory deposition, together with the clean workpiece surface, enables a subsequent buildup of securely bonded and high uniform material.
REFERENCES:
patent: 3010009 (1961-11-01), Ducati
patent: 3179783 (1965-04-01), Johnson
patent: 3493415 (1970-02-01), Grisaffe et al.
patent: 3494852 (1970-02-01), Doctoroff
patent: 3839618 (1974-10-01), Muehlberger
patent: 4006340 (1977-02-01), Gorinas
Kremith Roland D.
Muehlberger Erich
Electro-Plasma, Inc.
Newsome John H.
LandOfFree
System and method for plasma coating does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System and method for plasma coating, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and method for plasma coating will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-881824