Patent ID: 6768194
Filing Date: 2004-07-27
Classification: C25D,H01L

Abstract:
An electrode apparatus for electroplating a metal overlay on a substrate having a front surface, a back surface, and a seed layer deposited on all surfaces, said electrode apparatus comprising:a cell means for containing and circulating an electrolyte; an annular sealing fixture having a â€œJâ€  shaped cross section for supporting the peripheral front surface of said substrate, said substrate is supported above said cell means by the shorter and inner member of said â€œJâ€  shape; a plurality of compliant electrode fingers inwardly mounted with a downward tilt angle, said pluralily of compliant electrode fingers are equally spaced about the inner periphery of said longer â€œJâ€  member, said compliant electrode fingers make conductive cathodic contact with said seed layer at the peripheral edge of said substrate thereby tolerating dimensional variations of the substrate and reducing large area complexities; a pressure means supplied to the back surface of said substrate, said pressure means effects a wiping action between said compliant electrode fingers and the peripheral edge while holding said substrate against said sealing fixture.