Western Electric Company, Inc.

Ted Dennis Polakowski, Jr

Donald Dinella

William M Beckenbaugh

John A Emerson

Patricia J Goldman

The method of depositing a metal on a surface especially suitable for the manufacture of printed circuit boards includes coating the surface with a sensitizing solution comprising an inaqueous solvent solution, a reducible salt of a non-noble metal, a salt of 2,7 anthraquinone disulfonic acid and a polyol type secondary reducing agent such as sorbitol. The coated surface is then dried and the dried surface may be stored for extended periods of time before further processing which consists of imaging the sensitized surface with ultraviolet light and electrolessly plating a metal over the imaged surface.

Method for depositing a metal on a surface

A method for depositing a metal on a surface is disclosed. The method comprises coating the surface with a sensitizing solution comprising at least a reducible salt of a non-noble metal dissolved in a solvent comprising water and an alcohol having a total number of carbon atoms ranging from 2 to 8. The coated surface is treated to reduce the metal salt to metallic nuclei to form a catalytic layer thereon capable of directly catalyzing the deposition of a metal on said nuclei from an electroless metal deposition solution.

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Fairview, NJ, United States of America

Ted Dennis Polakowski, Jr