Patent ID: 7390382
Filing Date: 2008-06-24
Classification: C25D,H01L

Abstract:
1. A system for processing microfeature workpieces, comprising: a vessel configured to receive a processing fluid, the vessel having a process location positioned to receive a microfeature workpiece, the process location having a center; an electrode support positioned to carry at least one electrode in fluid communication with the process location; a workpiece support positioned to carry a microfeature workpiece at the process location of the vessel; and an electric field control element positioned along a flow path between the electrode support and the process location, the electric field control element being configured to control an electrical current density in the processing fluid at the process location to have a first value at a first circumferential site of the process location and a second value different than the first value at a second circumferential site of the process location, the first and second circumferential sites being approximately the same distance from the center of the process location, wherein the vessel includes vanes aligned along axes extending between the electric field control element and the process location.