Composition and process for electroplating white palladium
AssigneeOccidental Chemical Corporation
InventorsKathleen B. Miscioscio, Paul T. Smith
Life of this patent
Estimating the term…
Abstract
Electroplating baths suitable for obtaining white deposits of palladium metal. The bath comprises diaminodinitrite, an ammonium salt, and a sufficient amount of ammonium hydroxide to obtain a bath pH of about 9. Buffers such as ammonium biborate may be employed to maintain the necessary bath pH during electroplating operations to produce a thin, white deposit of palladium metal. The process of using such electroplating baths to produce white deposits of palladium metal on substrates is also disclosed and claimed.
Claims2
A stable aqueous electroplating bath suitable for obtaining thin, white deposits of palladium metal which consists essentially of a bath soluble source of pure palladium metal, free of alloying elements, which source is present in amounts sufficient to provide from about 0.1 to about 20 g/l palladium in the bath, from about 30 to about 120 g/l of a bath soluble ammonium conductivity salt, a sufficient amount of ammonium hydroxide to adjust and maintain the pH in the bath of from about 8 to 10 and a buffer selected from ammonium biborate and sodium tetraborate to maintain the pH within said range.
Dependencies are inferred from the claim text.