| 摘要 |
<p>Cyanide-free electrolyte composition for depositing a silver or silver alloy layer on a substrate, comprises at least a silver ion source, sulfonic acid and/or its derivative, wetting agent and hydantoin (I). Cyanide-free electrolyte composition for depositing a silver or silver alloy layer on a substrate, comprises at least a silver ion source, sulfonic acid and/or its derivative, wetting agent and hydantoin of formula (I). R 1, R 2aryl (optionally substituted), H or 1-5C-alkyl. An independent claim is included for a method for separating silver- or silver alloy layer on a substrate comprising contacting the substrate to be coated in an adjusted current density of 0.1-2, preferably 0.3-1.5 A/dm 2>, with an electrolyte composition. [Image].</p> |
