Compositions – Etching or brightening compositions
Reexamination Certificate
2003-10-23
2008-09-23
Chen, Kin-Chan (Department: 1792)
Compositions
Etching or brightening compositions
C438S692000
Reexamination Certificate
active
07427361
ABSTRACT:
The invention generally relates to compositions and methods for chemically mechanically polishing a substrate, including a polishing accelerator, which is normally one or more oxidizers, an abrasive material, and chelating particles and/or metal-absorbent clay material. In addition, the invention can also involve methods of forming chelator particles and methods of separating metal-containing ions from polishing and/or etching solutions after polishing and/or etching.
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“Slurry Engineering for Self-Stopping, Dishing Free SIO2-CMP” by Nojo et al., IEEE, 1996 IEDM 96-349-352.
Frey Donald William
Hayden Christopher G.
Small Robert J.
Tredinnick Bruce
Chen Kin-Chan
DuPont Air Products NanoMaterials LLC
Morgan & Lewis & Bockius, LLP
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