Patent ID: 6033540
Filing Date: 2000-03-07
Classification: C25D,H01L,Y10S

Abstract:
A plating apparatus comprising:a plating tank suitable for holding a wafer so that a plating surface of the wafer faces upward;plating solution supply means for causing a plating solution supplied to the plating surface of the wafer to flow from a center of the plating surface of the wafer toward a periphery of the plating surface of the wafer; andan annular mesh anode electrode having a central aperture and a plurality of openings surrounding the central aperture, the annular anode electrode being disposed opposite the wafer for generating an electric field between said anode electrode and the wafer, using the wafer as a cathode, the electric field having a lower density in a central portion of the wafer than at an edge of the wafer.