Patent ID: 7566386
Filing Date: 2009-07-28
Classification: C25D,C25F,Y10S

Abstract:
1. An apparatus for electrochemically processing a surface of a substrate, comprising: a substrate holder; a processing chamber adapted to hold an electrolyte and including a principal fluid flow chamber providing a flow of electrolyte processing fluid to at least one surface of the substrate, and a plurality of nozzles providing a flow of electrolyte processing fluid to the principal fluid flow chamber, the plurality of nozzles arranged and directed to provide both radial and vertical fluid flow of electrolyte processing fluid; a plurality of independently operable concentric electrodes in the processing chamber with the electrodes in electrical contact with an electrolyte provided into the chamber; an electrical field shield having an annulus between the substrate holder and the concentric electrodes, with the annulus configured to shape an electric field at a peripheral portion of the substrate during electrochemical processing of the substrate surface, the electrical field shield comprising a weir member at an upper portion of the processing chamber, the weir member having a flange that extends radially inwardly to form the annulus.