Patent ID: 7128823

Claim:
A method for plating metal onto a substrate, comprising: positioning the substrate in a catholyte solution contained in a catholyte chamber of a plating cell, the catholyte solution comprising: an acid source at a concentration of between about 5 g/L and about 15 g/L; a copper source at a concentration of between about 0.8M and about 0.9M; chlorine ions at a concentration of between about 25 ppm and about 75 ppm; and one or more additives; and applying a plating bias between the substrate and an anode positioned in an anolyte chamber of the plating cell, the anolyte chamber being separated from the catholyte chamber by an ionic membrane and being supplied with an anolyte solution comprising a copper source having a concentration of greater than about 51 g/L, wherein the anolyte solution does not contain the one or more additives.