| abstract |
The present invention relates to the use of an aqueous composition for depositing a tin-containing or tin alloy layer. The aqueous composition contains tin ions, and optionally contains alloy metal ions selected from silver, copper, indium, and bismuth ions, and at least one Additives, the at least one additive comprises a linear or branched polyimidazolium compound, the linear or branched polyimidazolium compound comprises a structural unit of formula L1 And a method for depositing a tin alloy layer on the substrate. |