Rohm & Haas Electronic Materials LLC

Shipley Company LLC

Andre Egli

Jochen Heber

Anja Vinckier

Wan Zhang

Raymund W M Kwok

Qing Chen

Wing Kwong Wong

Jonas Guebey

Compositions and methods for depositing gold alloys are disclosed. The compositions include certain dithiocarboxylic acids, salts and esters thereof and mercapto group containing compounds which provide bright gold alloy deposits with uniform color.

Gold alloy electrolytes

Electrolytes for white bronzes are disclosed as well as methods of depositing the white bronzes. The electrolytes for depositing the white bronzes are cyanide free and provide a uniform white color.

Electroplating bronze

The present invention provides inter alia electroplating compositions, methods for use of the compositions and products formed by the compositions. Electroplating compositions of the invention are characterized in significant part by a grain refiner/stabilizer additive comprising one or more non-aromatic compounds having &pgr; electrons that can be delocalized, e.g., an &agr;,&bgr; unsaturated system or other conjugated system that contains a proximate electron-withdrawing group. Compositions of the invention provide enhanced grain refinement and increased stability in metal plating solutions, particularly in tin and tin alloy plating formulations.

Metal alloy compositions and plating methods related thereto

The present invention provides inter alias electroplating compositions, methods for use of the compositions and products formed by the compositions. Electroplating compositions of the invention are characterized in significant part by a grain refiner/stabilizer additive comprising one or more non-aromatic compounds having &pgr; electrons that can be delocalized, e.g., an &agr;,&bgr; unsaturated system or other conjugated system that contains a proximate electron-withdrawing group. Compositions of the invention provide enhanced grain refinement and increased stability in metal plating solutions, particularly in tin and tin alloy plating formulations.

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Reiden, Switzerland

Andre Egli