Use of phosphinic acids and/or phosphonic acids in redox processes
AssigneeMerck Patent GmbH
InventorsWolfgang Hierse, Nikolai Ignatyev
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Abstract
The present invention relates to the use of phosphinic acids and/or phosphonic acids and salts thereof, preferably as surface-active compounds, in redox processes, in particular in electroplating technology, particularly preferably in electroplating baths, and to electroplating baths comprising these compounds.
Claims8
In a method of conducting a redox process of electroplating using a surface active agent, comprising coating metal layers on a surface by said redox process of electroplating employing the surface active agent, the improvement wherein the surface active agent is a phosphinic acid and/or phosphinic acid salt of formula (I)
- Rf1Rf2P(O)O—X (I)
- where Rf1 and Rf2 each, independently of one another, denote branched or unbranched alkyl chains of the formula CnF2n−z+1Hz, where n=2-8, z=0-3 and in which X=H, an alkali metal or ammonium or phosphonium.
Dependencies are inferred from the claim text.