Galvanic bath

Abstract

A galvanic bath, especially an acidic galvanic bath, comprises an anode, a cathode and an electrolyte. The anode has two or more phases, and the electrolyte comprises more than 70 mg / l chloride and 5-5000 mg / l, especially 200-1200 mg / l of either molybdenum, vanadium, zirconium, tantalum, tungsten, hafnium or titanium in oxo-acidic anion or polyanion form, or acid anhydride cation form.

Description

technical field [0001] The present invention relates to electroplating baths, especially acid electroplating baths, comprising an anode, a cathode and an electrolyte. Background technique [0002] Electroplating baths of the above-mentioned type are known in the prior art, so that the present invention does not require separate documentary evidence. [0003] Electroplating methods such as copper, nickel, zinc or tin plating are performed with soluble or insoluble anodes. Soluble anodes, also known as active anode systems, go into solution during electrolysis. Insoluble anodes, also known as inert anode systems, do not go into solution during electrolysis and usually consist of a support material and a coating applied thereon, said coating being called the active layer. Among these, titanium, niobium, stainless steel or other inert metals are generally used as support materials, but in any case where such materials are used, they become inert under the electrolytic conditio...

AI Technical Summary

Problems solved by technology

Also, it is disadvantageous in that despite the separator, gas such as oxygen is generated on the anode to oxidize reactants such as additives contained in the plating bath

As a result, the deposition described in DE 102 61 493 A1 still consumes an excess of reactants, which is uneconomical and also requires more equipment

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