For the reproducible manufacturing of particularly uniform and brilliant i.e., highly bright copper coatings that are leveled and ductile as well, a copper plating bath is utilized that contains as an additive a mixture of oligomeric phenazinium compounds. The mixture contains at least one phenazinium compound selected from the group comprising compounds containing two monomeric units and compounds containing three monomeric units having the general chemical formulae and set forth in the patent claims and in the specification as well as further oligomeric phenazinium compounds.
为了实现制造特别均匀、亮度高且具有平整和可塑性的
铜涂层,使用了含有寡聚
苯并咪唑化合物混合物的
铜电镀浴液作为添加剂。该混合物至少包含一种
苯并咪唑化合物,所述化合物包括含有两个单体单元和含有三个单体单元的化合物,其具有在专利要求和说明书中所列出的
化学式
和,以及其他寡聚苯并咪唑化合物。