| abstract |
The present invention relates to ureylene additives, a method for their preparation, a use of said ureylene additives favorably as additive in metal or metal alloy deposition composition, preferably in a copper or copper alloy deposition composition, more preferably as leveler and/or suppressor therein, metal or metal alloy deposition composition comprising said ureylene additive and the use of such composition, a method for electrolyticaliy depositing a metal or metal alloy layer, preferably a copper or copper alloy layer, onto at least one surface of a substrate and metal or metal alloy layers formed from above metal or metal alloy deposition composition. The ureylene additives allow for example in the case of copper plating for very levelled copper deposits without voids, in particular when filling recesses. |