Electrolysis: processes – compositions used therein – and methods – Electrolytic coating – Controlling current distribution within bath
Reexamination Certificate
2005-05-10
2005-05-10
Nicolas, Wesley A. (Department: 1742)
Electrolysis: processes, compositions used therein, and methods
Electrolytic coating
Controlling current distribution within bath
C205S097000, C205S118000, C205S125000, C205S135000
Reexamination Certificate
active
06890413
ABSTRACT:
A process for electroplating metallic features of different density on a surface of a substrate comprises providing an electroplating bath having an anode, immersing the substrate into the electroplating bath, spaced from the anode, the substrate comprising a cathode. Positioned in the electroplating bath between the substrate and the anode, and adjacent to and separated from the substrate surface is a second cathode that includes a wire mesh screening portion having openings of different sizes conforming to the metallic features to be electroplated. The second cathode screening portion has openings of larger size adjacent areas of higher density of features to be electroplated and openings of smaller size adjacent areas of lower density of features to be electroplated. The process further includes 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 substrate.
REFERENCES:
patent: 20030168340 (2003-09-01), Kaja et al.
U.S. Appl. No. 09/699,909, Kaja et al., filed Oct. 30, 2002.
Cheng Tien-Jen
Fowler Todd M.
Giri Ajay P.
Hon Wong Keith Kwong
Nenadic Anton
Blecker, Esq. Ira D.
DeLio & Peterson LLC
Nicolas Wesley A.
Peterson, Esq. Peter W.
LandOfFree
Method and apparatus for controlling local current to... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for controlling local current to..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for controlling local current to... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3416386