Other

Macdermid, Incorporated

Macdermid Acumen, Inc.

Lenora M Toscano

Steven A Castaldi

Raymond A Letize

Ernest Long

Ronald Redline

Colleen Mckirryher

Carl P Steinecker

Donna M Kologe

Donna Kologe

Witold Paw

Paul Romaine

David Angelone

Keisuke Nishu

Katsutsugu Koyasu

A method for enhancing the solderability of a metallic surface is disclosed where the metallic surface is plated with a silver plate prior to soldering, which immersion silver plate is treated with an additive comprising a mercapto substituted or thio substituted silane compound. Preferred post treatments comprise 3-mercapto propyl trimethoxysilane and/or 3-oxtanoylthio-1-propyltriethoxy silane.

Method for enhancing the solderability of a surface

A method for enhancing the solderability of a metallic surface is disclosed where the metallic surface is plated with an immersion or electroless silver plate prior to soldering, after which immersion silver plate is treated with an alkaline polymer coating comprising aqueous vinyl polymers, aqueous acrylic polymers, anti-fungal agents and a benzotriazole or benzimidazole compound to produce a deposit that is resistant to electromigration and that provides an anti-tarnish and anti-corrosion coating on the surface.

Coating for silver plated circuits

A process for the manufacture of printed circuit boards is disclosed wherein a plated silver deposit is used both as an etch resist and as a final finish for enhancing the solderability of the copper circuits. An aqueous alkaline etchant which is free of halide ions is proposed as being particularly compatible with the silver etch resist/final finish.

Method for the manufacture of printed circuit boards

Growing community of inventors

Bristol, CT, United States of America

Lenora M Toscano