Other

Macdermid, Incorporated

Macdermid Acumen, Inc.

Nilesh Kapadia

Kesheng Feng

Steven A Castaldi

Witold Paw

John Ganjei

Steve Castaldi

A process for increasing the adhesion of a polymeric material to a metal surface, the process comprising contacting the metal surface with an adhesion promoting composition comprising: 1) an oxidizer; 2) an inorganic acid; 3) a corrosion inhibitor; and 4) an organic phosphonate; and thereafter b) bonding the polymeric material to the metal surface. The organic phosphonate aids in stabilizing the oxidizer and organic components present in the bath and prevents decomposition of the components, thereby increasing the working life of the bath, especially when used with copper alloys having a high iron content.

Adhesion promoting composition for metal leadframes

A nickel-chromium alloy etching composition comprising sulfuric acid, a source of chloride ions, including hydrochloric acid or sodium, potassium or ammonium chloride, and a sulfur compound comprising a sulfur atom with an oxidation state between &#x2212;2 to +5, such as thiosulfate, sulfide, sulfite, bisulfite, metabisulfite and phosphorus pentasulfide that can efficiently remove nickel-chromium alloy in the presence of copper circuits is disclosed.

Nickel-chromium alloy stripper for flexible wiring boards

A process is described for treating metal surfaces printed wiring boards and similar substrates to provide improved creep corrosion resistance on such surfaces. A modified organic solderability preservative composition is used in combination with an emulsion polymer to provide a modified polymer coating on the metal surface finish via a chemical reaction to provide enhanced corrosion protection of the surface.

Organic polymer coating for protection against creep corrosion

The present invention is directed to a microetching composition comprising a source of cupric ions, acid, a nitrile compound, and a source of halide ions. Other additive, including organic solvents, a source of molybdenum ions, amines, polyamines, and acrylamides may also be included in the composition of the invention. The present invention is also directed to a method of microetching copper or copper alloy surfaces to increase the adhesion of the copper surface to a polymeric material, comprising the steps of contacting a copper or copper alloy surface with the composition of the invention, and thereafter bonding the polymeric material to the copper or copper alloy surface.

Microetching composition and method of using the same

The present invention related to an improved microetching solution and a method of using the improved composition for roughening a metal surface and increasing the adhesion strength of a metal layer to a subsequently applied layer. The microetching composition is an aqueous solution comprising cupric ion source, a pyridine derivative, multiethyleneamine, and an acid. In a preferred embodiment, the microetching solution of the invention also comprises a source of halide ions such as sodium chloride or hydrochloric acid.

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Shelton, CT, United States of America

Nilesh Kapadia