Title: Method for the production of radiant energy imaged printed circuit boards

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.

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Inventors: Polichette, Joseph (South Farmingdale, NY, US)
Leech, Edward J. (Oyster Bay, NY, US)

Application Number: 225645
Filing Date: 1972-02-11
Publication_date: 1976-01-06
Assignee: Photocircuits Division of Kollmorgen Corporation (Glen Cove, NY)
Primary Class(es): 205/126 205/125, 205/150, 205/159, 205/187, 205/191, 205/205, 205/210, 205/224, 427/97.2, 427/290, 427/292, 427/305, 427/306, 427/316, 430/153, 430/319
Other Classes:
US Patent Ref:

3152903	Oct, 1964	Shepard et al.	96/64.
3436233	Apr, 1969	Jackson	117/130.
3562005	Feb, 1971	De Angelo et al.	117/130.
3615732	Oct, 1971	Shipley et al.	117/130.
3627558	Dec, 1971	Roger et al.	117/47.
3674485	Jul, 1972	Jonker et al.	96/36.
3704208	Nov, 1972	Russo	117/47.
3772056	Nov, 1973	Polichette et al.	96/36.

Other Refs:
Primary Examiner: Drummond, Douglas J.
Assistant Examiner: Massie, J.
Attorney: Morgan, Finnegan, Pine, Foley & Lee