Patent ID: 6890413
Filing Date: 2005-05-10
Classification: C25D,H01L,H05K

Abstract:
1. A process for electroplating metallic features of different density on a surface of a substrate comprising: providing an electroplating bath having an anode therein; immersing the substrate into the electroplating bath, spaced from the anode, the substrate comprising a cathode; positioning into the electroplating bath between the substrate and the anode, and adjacent to and separated from the substrate surface, a second cathode including a screening portion having openings of different sizes conforming to the metallic features to be electroplated, the second cathode screening portion having openings of larger size adjacent areas of higher density of features to be electroplated and having openings of smaller size adjacent areas of lower density of features to be electroplated; and impressing a current through the electroplating bath between the substrate and the anode, and between the second cathode and the anode, and electroplating the metallic features of different density onto the surface of the substrate.