| 主权项 |
1. An aqueous based composition consisting of one or more sources of copper ions, one or more chelating agents selected from the group consisting of polycarboxylic acids, salts thereof, polyaminocarboxylic acids and salts thereof, water, optionally one or more stabilizers selected from the group consisting of amines, alkanolamines, thioamides, azole compounds and salts thereof, optionally one or more surfactants, and one or more reducing agents having formula: wherein Xy+ is a neutralizing counter cation of formula (I), where y+ is an integer of one or greater and Xy+ is selected from the group consisting of H+, ammonium cation, quaternary ammonium cation, sulfonium cation, phosphonium cation, pyridinium cation, monovalent metal cation, multivalent metal cation and divalent organometallic cation;
R and R′ are independently hydrogen, carboxyl, carboxyalkyl, sulfonate, sulfoxide, unsubstituted, linear or branched alkyl, sulfinate; substituted or unsubstituted aryl;Z is chosen from unsubstituted, linear or branched (C1-C6) alkyl, acetyl or substituted or unsubstituted (C6-C10) aryl; m is an integer of 1 to 6; and n is 1; and the composition is free of formaldehyde. |
