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US 2003/0070933 A1Published application
Process and composition for high speed plating of tin and tin alloys
OwnerDavid Crottyinventor
Life of this patent
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Abstract
A composition and process for electroplating tin or tin alloys onto a substrate at relatively high current densities. The electrolyte comprises toluene sulfonic acid and a source of ammonium ions and/or magnesium ions. The process is particularly suited to high speed reel to reel or strip steel plating.
Claims28
A composition for electroplating tin or tin alloys onto a substrate, said composition comprising:
- a). a source of tin ions;
- b). toluene sulfonic acid;
- and
- c). a material selected from the group consisting of sources of ammonium ions, sources of magnesium ions, and combinations of the foregoing.
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A process for electroplating tin or tin alloys onto a substrate, said process comprising contacting the substrate with a composition comprising:
- a). a source of tin ions;
- b). toluene sulfonic acid;
- c). a material selected from the group consisting of sources of ammonium ions, sources of magnesium ions, and combinations of the foregoing;
- and applying an electrical potential such that the substrate becomes a negative electrode in the composition.
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Dependencies are inferred from the claim text.