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Priority claimed from AT0143390Aexternal-prioritypatent/AT395177B/en
Application filed by Elo-Chem Atztechnik GmbhfiledCriticalElo-Chem Atztechnik Gmbh
Publication of MD940200ApublicationCriticalpatent/MD940200A/en
It is proposed an electrolytically regenerated solution for printed circuit boards and shaped parts of copper and copper alloys with the copper tetraminesulphate content, as well as ammonia, ammonium sulphate, ammonium chloride, if appropriate ammonium nitrate as well as increasing the catalyst etching speed.According to the invention such composition for etching is characterized by the content of vanadium or vanadium compound as a catalyst, in an amount of 1 mg to 99 mg/l of etching solution recalculated for vanadium.
MD94-0200A1990-07-051994-07-12Electrolytically regenerated solution for printed circuit boards etching
MD940200A
(en)