Cyanide-free silver electroplating solutions
AssigneeRohm and Haas Electronic Materials LLC
InventorsMargit Clauss, Wan Zhang-Berlinger
Life of this patent
Estimating the term…
Abstract
A cyanide-free silver electroplating solution may be used to electroplate mirror bright silver layers at high current density ranges and at high temperatures such as in reel-to-reel electroplating. The cyanide-free silver electroplating solution is environmentally friendly.
Claims8
A solution comprising one or more sources of silver ions, one or more complexing agents chosen from hydantoin, hydantoin derivatives, succinimide and succinimide derivatives, one or more organic sulfides chosen from dialkyl sulfides and dialkyl disulfides, and one or more pyridyl acrylic acids, the solution is cyanide-free.
A method comprising:
- a) providing a solution comprising one or more sources of silver ions, one or more complexing agents chosen from hydantoin, hydantoin derivatives, succinimide and succinimide derivatives, one or more organic sulfides chosen from dialkyl sulfides and dialkyl disulfides, and one or more pyridyl acrylic acids, the solution is cyanide-free;
- b) contacting a substrate with the solution;
- and
- c) electroplating a silver onto the substrate.
Dependencies are inferred from the claim text.