Rohm & Haas Electronic Materials LLC

Rohm and Haas Electroncis Materials LLC

Katharina Weitershaus

Wan Zhang-Beglinger

Andreas Scheybal

Jonas Guebey

Krishna Balantrapu

Christos Comninellis

Manganese-(III) species is generated and regenerated in a mixed aqueous acid solution containing manganese-(II) species by injecting ozone gas in the mixed aqueous acid solution such that ozone oxidizes at least some of the manganese-(II) species to the manganese-(III) species with at least 60% Mn(III) generation efficiency. The acids include sulfuric acid and an alkane sulfonic acid. The aqueous acid solution containing manganese-(III) and manganese-(II) species is used to etch polymer materials. The etch is a chrome-free etch method.

Methods of generating manganese (III) ions in mixed aqueous acid solutions using ozone

The plastisol coated plating tools are used to secure polymer containing substrates in electroless plating baths during electroless plating of the polymers. To prevent metallization of the plastisol coated plating tools during electroless metallization, compositions of sulfur compounds are applied to the plastisol. After metallization the plastisol coated plating tools may be re-used without the need to strip the unwanted metal from the tools.

Metallization inhibitors for plastisol coated plating tools

A chrome-free acidic aqueous solution of sulfuric acid and one or more organic acids and manganese (II) and (III) ions is applied to an organic polymer surface to etch the surface. The etched surface is then plated with metal.

Chrome-free methods of etching organic polymers with mixed acid solutions

White bronze is electroplated from a cyanide-free tin/copper bath onto a void inhibiting layer coating a copper underlayer. The void inhibiting metal layer includes one or more void inhibiting metals.

Adhesion promotion of cyanide-free white bronze

A chrome-free composition of an acidic suspension of manganese compounds and manganese ions are applied to an organic polymer surface to etch the surface. The etched surface is then plated with metal.

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Kriens, Switzerland

Katharina Weitershaus