Liquid purification or separation – Processes – Liquid/liquid solvent or colloidal extraction or diffusing...
Reexamination Certificate
2007-02-23
2010-10-26
Drodge, Joseph W (Department: 1797)
Liquid purification or separation
Processes
Liquid/liquid solvent or colloidal extraction or diffusing...
C204S571000, C210S634000, C210S663000, C210S669000, C210S787000, C210S806000, C210S805000, C439S691000, C439S692000, C439S693000, C451S036000, C451S060000, C451S446000
Reexamination Certificate
active
07820051
ABSTRACT:
A method, process and system for the recycling of electrochemical-mechanical planarization slurries/electrolytes as they are used in the back end of line of the semiconductor wafer manufacturing process is disclosed. The method, process and system includes with the removal of metal ions from slurries using ion exchange media and/or electrochemical deposition.
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Fang Rui
Kulkarni Deepak
Watts David K.
Drodge Joseph W
International Business Machines - Corporation
MacKinnon Ian
Roberts Mlotkowski Safran & Cole P.C.
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