Patent ID: 6544399
Filing Date: 2003-04-08
Classification: C25D

Abstract:
A method for electro plating a metal comprising copper onto a substrate having sub-micron features, comprising:disposing the substrate having and an anode in a plating solution, the plating solution comprising: water; copper ions at a molar concentration from about 0.1 to about 1.2, wherein the copper ions are obtained from copper sulfate, copper flouroborate, copper gluconate, copper sulfamate, copper pyrophosphate, copper chloride, copper cyanide, copper citrate, or mixtures thereof; a polyether at a concentration from about 0.1 ppm to about 2500 ppm of the plating solution; a divalent sulfur compound at a concentration from about 0.05 ppm to about 1000 ppm of plating solution, the sulfur compound having the structure R1â€”(S)nâ€”R2, wherein R1 and R2 are the same or different organic groups, and n is the number of sulfur atoms between 1 and 6; and a substituted thiodiazole at a concentration of from about 0.1 ppm to about 50 ppm of plating solution, the substituted thiodiazole having the cyclic structure: wherein X1 and Y2 can be the same or different groups; and electrodepositing copper ions in the solution onto the substrate.