Circuit board having conductor runs resistant to formation of no

Combustion – Illuminating flash device – e.g. – photographic bulb – etc. – Fuel charge within sealed transparent casing – e.g. – bulb

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174 685, 252514, 252518, 362 11, 362 13, 362 14, 362 15, 427 96, 427217, F21K 502, G03B 1502, H01B 120

Patent

active

042343046

ABSTRACT:
An improved circuit board comprising a substrate having electrical conductor runs resistant to the formation of electrically non-conductive localized areas carried thereon. Such a circuit board is particularly adapted to use with a flash lamp array having a plurality of flash lamps and sequencing electrical circuitry for sequentially flashing the lamps. The sequencing electrical circuitry is formed in part by the conductor runs. The conductor runs comprise an organic polymer binder for attachment of the conductor runs to the substrate and silver-coated vitreous bead-like particles with a triazole-silver water-insoluble reaction product comprising the surface of the bead-like particles. The triazole-silver reaction product prevents the formation of non-conductive localized areas in the conductor runs.

REFERENCES:
patent: 3988647 (1976-10-01), Bolon et al.
patent: 3990832 (1976-11-01), Smialek
patent: 4049844 (1977-09-01), Bolon et al.
patent: 4133023 (1979-01-01), Hanson
patent: 4133630 (1979-01-01), Yreeswijk et al.
patent: 4133631 (1979-01-01), Collins et al.
patent: 4158879 (1979-06-01), Peterson

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