Patent ID: 8262895
Filing Date: 2012-09-11
Classification: C07D,C25D,H05K

Abstract:
1. A copper electroplating bath comprising: a source of copper ions, an electrolyte, and a leveling agent, wherein the leveling agent is a reaction product of one or more benzimidazole compounds with one or more epoxide-containing compounds; wherein at least one benzimidazole compound has the formula wherein R 1 is selected from H, (C 1 -C 3 )alkyl, ar(C 1 -C 3 )alkyl, hydroxy(C 1 -C 3 )alkyl and hydroxy; each R 2 is independently selected from (C 6 -C 18 )aryl, (C 1 -C 3 )alkyl, ar(C 1 -C 3 )alkyl, hydroxy(C 1 -C 3 )alkyl and hydroxy; and a=0-4, provided that a >0 when R 1 ═H.