Method of manufacturing printed circuit boards

Electricity: conductors and insulators – Conduits – cables or conductors – Single duct conduits

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427 53, 427 97, 427 98, 96 362, H05K 318

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active

040852857

ABSTRACT:
Manufacture of photosensitive material by a dispersion of particles of semiconducting metal oxide having a charge sign opposite to that of the substrate in the dispersion agent, which dispersion is provided on the substrate surface and adhered thereto. In a similar manner walls of a hole for electrical through-connections are made photosensitive as a pretreatment for metal-plating.

REFERENCES:
patent: 3380823 (1968-04-01), Gold
patent: 3485658 (1969-12-01), Iler
patent: 3616294 (1971-10-01), Kheighatin
patent: 3627576 (1971-12-01), Knorre
patent: 3674485 (1972-07-01), Jonker
patent: 3758304 (1973-09-01), Janssen

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