Patent ID: 7510639
Filing Date: 2009-03-31
Classification: C08G,C25D,H01L,H05K

Abstract:
1. An electroplating bath comprising a source of copper ions, an electrolyte, and a leveling agent mixture, the leveling agent mixture comprising a first leveling agent having a first mobility and a second leveling agent having a second mobility, wherein the first mobility is less than the second mobility, and wherein the leveling agent mixture has a polydispersity of ≧2.5 and one leveling anent is a reaction product of an imidazole and an epihalohydrin and another leveling agent is a reaction product of an imidazole and a polyepoxide compound having a formula: wherein R is (C 1 -C 10 )alkyl; and R 2 and R 3 are independently chosen from H and R, wherein n=1-20.