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US 2009/0014415 A1Published application
Compositions and methods for rapidly removing overfilled substrates
AssigneeEKC Technology, Inc.
InventorsPhilippe H. Chelle, Robert J. Small
Life of this patent
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Abstract
This invention relates to compositions and methods for removing overfilled substrates, preferably at a relatively high removal rates Advantageously, a composition according to the invention can contain an oxidizer, preferably a per-type oxidizer such as a peroxide, periodic acid, and peracetic acid, and may also optionally contain an abrasive.
Claims20
-24. (canceled)
A method of chemical mechanical polishing of a substrate comprising the steps of:
- A) providing a substrate having a surface comprising copper disposed over a predominately dielectric layer;
- B) movably contacting the substrate with a chemical-mechanical-polishing composition under conditions where at least a portion of the copper is removed, wherein the chemical-mechanical-polishing composition comprises:
- a) an oxidizer selected from the group consisting of a peroxide, periodic acid, peracetic acid, and ammonium persulfate, wherein the oxidizer forms free radicals;
- b) water,
- c) an amine-containing film-forming agent, and
- d) at least one non-chelating free radical quencher selected from an hydroxyl-containing amine, a polyol compound, an unsaturated cycloalkene having more than one carbon-carbon double bond, a diazene compound, an azobenzene compound, humic acid, and/or derivatives and salts thereof,
- with the proviso that the at least one non-chelating free radical quencher is not ascorbic acid, isopropanol, thiamine, or a glycol compound, and that the non-chelating free radical quencher is not the amine-containing film-forming agent, and
- wherein the amount of the non-chelating free radical quencher is sufficient to reduce the amount of corrosion of the polished copper surface.
5 more elements
Dependencies are inferred from the claim text.