Coating processes – Electrical product produced – Integrated circuit – printed circuit – or circuit board
Patent
1981-12-23
1983-10-04
Lusignan, Michael R.
Coating processes
Electrical product produced
Integrated circuit, printed circuit, or circuit board
427 58, 427122, 427331, 427444, 361120, 264 22, 264 26, 264 27, B05D 512
Patent
active
044078498
ABSTRACT:
Disclosed is a method of improving the coating on electrodes (11 and 12) in spark gap devices which minimizes filament formation, densifies the coating, and ensures a good bond between the coating and underlying electrode. The device is coupled to a circuit (FIG. 2) which includes appropriate components so that a rapid sequence of current pulses having large amplitudes during arc initiation is passed through the device. The coating bonds with a different area of the cathode for each current pulse. The signal may be applied with appropriate reversal of polarities so that essentially the entire surface of both electrodes is thus reacted. Subsequently, the device may be subjected to an additional pulse in order to leave asperities on the surface which will increase field emission and ensure a low surge limiting voltage.
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Haas Laird K. S.
Herring Larry H.
Nakada Yoshinao
Bell Telephone Laboratories Incorporated
Birnbaum Lester H.
Bueker Richard
Lusignan Michael R.
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