Patent ID: 8679317
Filing Date: 2014-03-25
Classification: C25D,H01L,H05K

Abstract:
1. An electrolytic copper plating bath used for filling blind via holes formed on a substrate with copper, wherein the electrolytic copper plating bath consists of a water-soluble salt, sulfuric acid and chloride ions, and, as additives, a brightener, a carrier and a leveler, wherein said leveler consists of a copolymer (B) represented by the following formula (9): wherein R 21 and R 22 , respectively, represent an unsubstituted alkyl group having 1 to 4 carbon atoms, R 23 represents a substituted or unsubstituted alkyl group having 1 to 3 carbon atoms, and r and s are, respectively, an integer of 1 or more.