Chemistry: electrical and wave energy – Processes and products
Patent
1972-02-11
1976-01-06
Drummond, Douglas J.
Chemistry: electrical and wave energy
Processes and products
96 362, 204 20, 204 24, 204 30, 204 38B, 204 38S, 427 97, 427 98, 427290, 427292, 427305, 427306, 427316, H05K 318
Patent
active
039309630
ABSTRACT:
Radiant energy imaged printed circuit boards are provided by treating an insulating base with a composition of a reducible metal salt and a radiant energy sensitive compound, exposing the treated base to radiant energy in selected areas to produce metallic nuclei in the form of a non-conducting real image of the desired circuit pattern, rinsing the exposed base to remove unexposed metal salts and exposing the real image to an electroless metal bath to build up conductor lines of electroless metal thereon. In an alternative procedure, conductor lines are built up by electroplating with the same or a different metal and, optionally, solder coating.
REFERENCES:
patent: 3152903 (1964-10-01), Shepard et al.
patent: 3436233 (1969-04-01), Jackson
patent: 3562005 (1971-02-01), De Angelo et al.
patent: 3615732 (1971-10-01), Shipley et al.
patent: 3627558 (1971-12-01), Roger et al.
patent: 3674485 (1972-07-01), Jonker et al.
patent: 3704208 (1972-11-01), Russo
patent: 3772056 (1973-11-01), Polichette et al.
Leech Edward J.
Polichette Joseph
Drummond Douglas J.
Massie J.
Photocircuits Division of Kollmorgen Corporation
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