Immersion tin or tin alloy plating bath with improved removal of cuprous ions

The invention concerns an immersion tin plating bath which comprises at least one aromatic sulfonic acid, at least one first precipitation additive and at least one second precipitation additive. The at least one first precipitation additive is an aliphatic poly-alcohol compound, an ether thereof or...

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Bibliographische Detailangaben
Hauptverfasser:	KILIAN ARND, MUSKULUS MARKUS, SCHAFSTELLER BRITTA, BARZ IRIS
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS THEREFOR CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL ELECTROFORMING ELECTROLYTIC OR ELECTROPHORETIC PROCESSES INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL METALLURGY PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION
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Beschreibung
Zusammenfassung:	The invention concerns an immersion tin plating bath which comprises at least one aromatic sulfonic acid, at least one first precipitation additive and at least one second precipitation additive. The at least one first precipitation additive is an aliphatic poly-alcohol compound, an ether thereof or a polymer derived thereof having an average molecular weight in the range of 62 g/mol and 600 g/mol. The at least one second precipitation additive is a polyalkylene glycol compound having an average molecular weight in the range of 750 to 10,000 g/mol.