Electrolyte for copper deposition based on aqueous polyaniline dispersion

The properties of an electrolyte for acid bright copper deposition have bee n investigated. The influence of polyaniline dispersion, polysafranine dye (levelling component), poly(alkylene oxide) (wetting agent) or dialkyl disu lfides (brightener) and combinations of these additives on the quality of e lectrodeposited coatings were studied. The presence of polyaniline dispersi ons increased the levelling ability by 16% and at the same time the concent ration of the other additives could be considerably reduced. The electrolyt e containing polyaniline dispersion could also be efficiently used under pr oduction conditions.