Patent ID: 8679316
Filing Date: 2014-03-25
Classification: C25D,H05K

Abstract:
1. An aqueous, acid bath for the electrolytic deposition of copper, said bath containing at least one copper ion source, at least one acid ion source, at least one brightener compound and at least one leveler compound, wherein said at least one leveler compound is a synthetically produced functionalized peptide, wherein said functionalized peptide is a peptide functionalized with at least one moiety selected from the group consisting of polyalkylene glycol groups, polyalkylene imine groups and polyvinyl alcohol groups, and wherein said functionalized peptide contains, at the C terminus thereof, an end amino acid, which is selected from the group consisting of leucine, isoleucine, methionine, phenylalanine, tryptophan, asparagine, glutamine, thyronine, lysine, arginine and histidine.