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US 2010/0300890 A1Published application
Pyrophosphate-based bath for plating of tin alloy layers
AssigneeAtotech Deutschland GmbH
InventorsPhilip Hartmann, Lars Kohlmann, Heiko Brunner, Klaus-Dieter Schulz
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Abstract
An aqueous cyanide-free electrolyte bath for plating of tin alloy layers on substrate surfaces comprising (i) a tin ion source and a source for another alloy element, characterised in that it further contains (ii) N-methyl pyrrolidone is described.
Claims22
An aqueous cyanide-free electrolyte bath for plating of tin alloy layers on substrate surfaces, comprising
- (i) a tin ion source and a source for another alloy element, characterised in that it further contains;
- (ii) N-methyl pyrrolidone.
Dependencies are inferred from the claim text.