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US 5,631,091 AGranted
Bismuth coating protection for copper
AssigneeFry's Metals, Inc.
InventorAnthony M. Piano
Life of this patent
Estimating the term…
Abstract
Copper-containing surfaces, such as a copper surface for use in an electrical circuit, are protected by the provision of a bismuth coating.
Claims32
A coating composition which is effective for immersion plating a coating of bismuth metal onto a copper-containing surface and which comprises an acid solubilized bismuth salt and an iodide.
A coating composition which is effective for immersion plating a coating of bismuth metal onto a copper-containing surface and which consists essentially of bismuth salt, halogen acid, and water, with or without an addition of iodide and/or complexing agent.
Dependencies are inferred from the claim text.