Patent ID: 7585398

Claim:
An electrochemical deposition chamber for depositing material onto microfeature workpieces, the chamber comprising: a processing unit including a first flow system configured to convey a flow of a first processing fluid to a microfeature workpiece at a processing site; an electrode unit including first and second electrode compartments and a second flow system separate from the first flow system, the second flow system being configured to convey a flow of a second processing fluid through the electrode compartment; a barrier between the processing unit and the electrode unit that prevents nonionic species from passing between the first and second flow systems; a first electrode in the first electrode compartment and a second electrode in the second electrode compartment and arranged concentrically with the first electrode, with the first and second electrodes substantially equally spaced apart from the barrier; and the processing unit further comprising a field shaping module, the field shaping module of a dielectric material and having a first opening facing a first section of the processing site through which ions influenced by the first electrode can pass and a second opening facing a second section of the processing site through which ions influenced by the second electrode can pass.