Other

Macdermid, Incorporated

Macdermid Acumen, Inc.

John L Cordani, Jr

Steven A Castaldi

Kesheng Feng

Colleen Mckirryher

An adhesion promoting composition and a process for treating metal surfaces with the adhesion promoting composition is described. The adhesion promoting composition comprises an oxidizer, an acid, a corrosion inhibitor, a source of halide ions and a material selected from a mercapto propane sulfonate, mercapto propane sulfonic acid, and bis-sodium sulfopropyl disulfide. The adhesion promoting composition increases the adhesion of polymeric materials to the metal surfaces and also provides increased acid resistance.

Process for improving the adhesion of polymeric materials to metal surfaces

A process is disclosed for the purpose of increasing the adhesion of a polymeric material to a metal surface. The process comprises plating the metal surface with a layer of electroless nickel, electroless cobalt or electroless (or immersion) tin followed by phosphating the plated layer prior to bonding the polymeric material thereto. The process is particularly suited to treating printed circuit board inner-layers and lead frames.

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Wolcott, CT, United States of America

John L Cordani, Jr