Chemical-mechanical polishing with an embedded abrasive
First Claim
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1. A process for chemical-mechanical polishing comprising:
- providing a substrate;
coating said substrate with a layer of a dielectric material that includes an abrasive powder embedded and dispersed therein;
providing a grinding pad;
providing a polish solvent;
dispensing said polish solvent so that it flows between said substrate and said grinding pad; and
pressing the coated surface of said substrate against the surface of said grinding pad while at the same time rotating said substrate relative to said grinding pad.
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Abstract
A chemical-mechanical polishing process is described that provides high etch rates while at the same time minimizing the consumption of abrasives. This is achieved by embedding and dispersing the abrasive within the body of the material that is to be subjected to chemical-mechanical polishing.
9 Citations
13 Claims
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1. A process for chemical-mechanical polishing comprising:
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providing a substrate; coating said substrate with a layer of a dielectric material that includes an abrasive powder embedded and dispersed therein; providing a grinding pad; providing a polish solvent; dispensing said polish solvent so that it flows between said substrate and said grinding pad; and pressing the coated surface of said substrate against the surface of said grinding pad while at the same time rotating said substrate relative to said grinding pad. - View Dependent Claims (2, 4, 5, 6, 7, 8)
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3. The process of claim I wherein said polish solvent is taken from the group consisting of diluted Rippey'"'"'s SC-1, Rippey'"'"'s SS-25, and ILD-1300.
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9. A method for planarizing the surface of a semiconductor integrated circuit comprising:
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coating the surface of said integrated circuit with a layer of a dielectric material that includes an abrasive powder embedded and dispersed therein; providing a grinding pad; providing a polish solvent; dispensing said polish solvent so that it flows between said integrated circuit and said grinding pad; pressing the coated surface of said integrated circuit against the surface of said grinding pad while at the same time rotating said integrated circuit relative to said grinding pad, thereby gradually etching away said dielectric layer; and continuing said etching until said dielectric layer has been removed, including said imbedded abrasive powder. - View Dependent Claims (10, 11, 12, 13)
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Specification