Process for treating adhesion promoted metal surfaces with an organo-silcon post-treatment
AssigneeShipley Company, L.L.C.
InventorsJoseph R. Montano, John P. Cahalen
Life of this patent
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Abstract
A method for treating a micro-roughened metal surface to improve bonding between the metal surface and a polymer material. The method involves post-treating the micro-roughened conversion coated metal surface with an aqueous organo-silicon wetting composition after having formed the micro-roughened conversion coated metal surface with an adhesion promotion composition. Suitable organo-silicons include organosilanes, organosiloxanes, organosilizanes and the like. The method can be employed in the circuit board industry to improve bonding between layers in multilayer circuit boards.
Claims44
A method for treating a metal surface comprising:
- a) contacting the metal surface with an adhesion promotion composition to form a micro-roughened conversion coated metal surface, the adhesion promotion composition comprises a mixture of sulfuric acid and phosphoric acid, and a source of halide ions;
- and then
- b) contacting the micro-roughened conversion coated metal surface with an aqueous organo-silicon composition to prepare the metal surface for receiving a polymer material.
A method for treating a metal surface comprising:
- a) contacting the metal surface with an adhesion promotion composition to form a micro-roughened conversion coating on the metal surface, the adhesion promotion composition comprises an oxidizer, a corrosion inhibitor, a source of halide ions and a mixture of sulfuric and phosphoric acid;
- b) contacting the mirco-roughened conversion coated metal surface with an alkaline composition;
- and then
- c) contacting the micro-roughened conversion coated metal surface with an aqueous organo-silicon wetting composition to prepare the micro-roughened conversion coated metal surface to receive a polymer material.
A method of treating a metal surface comprising:
- a) contacting the metal surface with an adhesion promotion composition to form a micro-roughened conversion coated surface on the metal surface and to reduce the metal surface, the adhesion promotion composition comprises a reducer, dissolution agent, a source of halide ions and a mixture of sulfuric and phosphoric acid;
- b) contacting the micro-roughened and reduced metal surface with an aqueous organo-silicon composition to prepare the micro-roughened and reduced metal surface for receiving a polymeric material.
Dependencies are inferred from the claim text.