Patent ID: 8852417

Claim:
A process for electrolytically processing a microfeature workpiece as the working electrode with a first processing fluid and a counter electrode comprising: providing a microfeature workpiece comprising a nonmetallic substrate having a dielectric layer disposed over the substrate and a continuous metal feature disposed on the dielectric layer and having microfeatures comprising recessed structures; contacting a surface of the microfeature workpiece with the first processing fluid, the first processing fluid comprising first processing fluid species including one or more cations, an anion, and a complexing agent; contacting the counter electrode with a second processing fluid; producing an electrochemical reaction at the counter electrode; providing an anion permeable barrier between the first processing fluid and the second processing fluid to substantially prevent movement of cationic species and the complexing agent between the first processing fluid and the second processing fluid; and depositing the one or more cations as metal into the recessed structures on the surface of the microfeature workpiece.