Chemistry: electrical and wave energy – Processes and products
Patent
1984-04-16
1986-01-14
Tufariello, T. M.
Chemistry: electrical and wave energy
Processes and products
204 30, C25D 556
Patent
active
045644241
ABSTRACT:
Electrically insulating polymeric film substrates are conductively metallized, e.g., to provide base members useful in the fabrication of printed circuits and the like, by (1) shaping into such film substrate an intimate homogeneous admixture of a film-forming polymer matrix having from 10 to 70 percent by total weight of said admixture of finely divided, non-conductive metal oxide particles uniformly distributed therein, (2) disrupting at least one face surface of said shaped film substrate to expose thereon a plurality of said finely divided, non-conductive metal oxide particles, (3) treating said at least one disrupted face surface with a preferably borohydride reducing agent to reduce said exposed metal oxide particles into a layer of electrically conductive free metal, whereby said at least one face surface is rendered electrically conductive, and, advantageously, (4) eletrolytically depositing a reinforcing, electrically conductive metallic overlayer atop said first layer of electrically conductive free metal.
REFERENCES:
patent: 3551304 (1970-12-01), Letter
patent: 3558441 (1971-01-01), Chadwick
patent: 3619382 (1971-11-01), Lupinski
patent: 3767538 (1973-10-01), Politycki
Alliot-Lugaz Maurice
Cassat Robert
Rhone-Poulenc Recherches
Tufariello T. M.
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