Patent ID: 7553401
Filing Date: 2009-06-30
Classification: C25D,H05K

Abstract:
1. A method for electrodepositing a metal on a workpiece having a generally flat vertically oriented major surface, the workpiece serving as a cathode in a plating cell, the plating cell containing an anode that is housed in an anode chamber of a size greater than the workpiece including a flat porous cloth oriented in a planar parallel relationship to the major surface of the workpiece that spreads the current distribution between the anodes and the workpiece such that the anode chamber acts as a virtual anode, a horizontally directed eductor, a solution flow dampening member coextensive with the anode chamber including a flow-directing surface longer than the workpiece and an electrolyte solution, the electrolyte solution containing metal ions, comprising the steps of: passing the electrolyte solution from an eductor over the flow-directing surface of a solution flow dampening member to produce a vertical solution flow that is uniform, parallel to and between the major surface of the workpiece and the parallel porous cloth of the anode chamber, and passing an electric current between the anode and the cathode whereby the metal ions in the electrolyte solution are deposited on the workpiece.