Patent ID: 6319386
Filing Date: 2001-11-20
Classification: C23C,C25D

Abstract:
A method of wet process treatment of a face of a flat substrate in a plating bath that includes a tray having an open top, a megasonic transducer array situated in said tray, means supplying a wet process treatment solution into said tray wherein the megasonic transducer array creates a ridge in said solution in said tray that can contact the substrate placed above said solution, and means for controllably applying megasonic energy to selected transducers of said array; the method comprisingorienting said substrate horizontally and face down so that said ridge contacts the face of said substrate; andcontrolling the application of megasonic energy to said transducer array to produce said ridge such that the ridge is contiguous with the solution in said tray, and to change the position of the ridge relative to the transducer array and to the substrate.