Vertical paddle plating cell

US5516412A · kind A · utility

Assignee

• International Business Machines Corporation · US

Inventors

• Panayotis Andricacos · Ossining, US
• Kirk G. Berridge · Fishkill, US
• John O. Dukovic · Pleasantville, US
• Matteo Flotta · Armonk, US
• Jose Ordonez · Valencia, US
• Helmut R. Poweleit · Highland, US
• Jeffrey S. Richter · Kernersville, US
• Lubomyr T. Romankiw · Briarcliff Manor, US
• Otto P. Schick · Poughquag, US
• Frank A. Spera · Poughkeepsie, US
• Kwong Hon Wong · Wappingers Falls, US

Key dates

• Filing date: May 16, 1995
• Grant date: May 14, 1996
• Expiry date: May 16, 2015

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S204/07
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

An electroplating cell includes a floor, ceiling, front wall, and back wall forming a box having first and second opposite open ends. A rack for supporting an article to be electroplated is removably positioned vertically to close the first open end and includes a thief laterally surrounding the article to define a cathode. An anode is positioned vertically to close the second open end, with the assembly defining a substantially closed, six-sided inner chamber for receiving an electrolyte therein for electroplating the article. The article and surrounding thief are coextensively aligned with the anode, with the floor, ceiling, front and back walls being effective for guiding electrical current flux between the cathode and the anode. In a preferred embodiment, the cell is disposed as an inner cell inside an outer cell substantially filled with the electrolyte, and a paddle is disposed inside the inner cell for agitating the electrolyte therein. The rack is removable and installable vertically upwardly which allows for automated handling thereof.