Patent ID: 8968531
Filing Date: 2015-03-03
Classification: C25D

Abstract:
1. Apparatus, comprising: a head; a rotor in the head for holding a workpiece; a contact ring on the rotor; a plurality of contact fingers on the contact ring; a di-electric material shield comprising an annular ring, with the contact ring and the shield comprising separate elements, and with the shield at least partially overlying and adjacent to the contact fingers; and a base including at least one electrode in an electrolyte vessel, with the head movable to a processing position where the contact ring is in the vessel and the contact fingers are immersed in electrolyte in the vessel, and a lifted position where the contact ring is removed from the vessel, and with the shield between the contact ring and the electrode, and the shield not sealing against a workpiece held in the rotor, when the head is in the processing position.