Cabot Microelectronics Corporation

Nalco Chemical Company

Nalco Company

Cmc Materials, Inc.

William J Ward

Steven Grumbine

Jeffrey Dysard

Glenn Whitener

Lin Fu

Shoutian Li

Pankaj K Singh

Brian S Johnson

Peter E Reed

Jeffrey R Cramm

Kevin J Moeggenborg

Andrew J Dunham

Phillip W Carter

Mingli Wei

Pious V Kurian

Vladimir A Grigoriev

Gary S Furman, Jr

Ji Cui

Seong-Hoon Yoon

Jeffery Atkins

John H Collins

John David Morris

Ananthasubramanian Sivakumar

Francesco De Rege Thesauro

Timothy P Johns

Ross Gray

E H Kelle Zeiher

Deepak A Musale

Benjamin Petro

Sriram Anjur

Ming-Shih Tsai

Kristine S Salmen

Ramasubramanyam Nagarajan

Helin Huang

Daniela White

Kim Long

Chul Woo Nam

Matthew Carnes

Robert W Novak

Daniel Mateja

Andrei S Zelenev

Timothy Patrick McGinnis

Angela S Kowalski

Ming-Chih Yeh

Chih-Pin Tsai

Hui-Fang Hou

Krzysztof Andruszkiewicz

Dmitry Dinega

Dimitry Dinega

Ross T Gray

Timothy Johns

The invention relates to a chemical-mechanical polishing composition comprising (a) a first abrasive comprising cationically modified colloidal silica particles, (b) a second abrasive having a Mohs hardness of about 5.5 or more, (c) a cationic polymer, (d) an iron containing activator, (e) an oxidizing agent, and (f) water. The invention also relates to a method of chemically mechanically polishing a substrate, especially a substrate comprising tungsten and barrier layers (e.g., nitrides), with the polishing composition.

Method to increase barrier film removal rate in bulk tungsten slurry

The inventive method comprises chemically-mechanically polishing a substrate with an inventive polishing composition comprising a liquid carrier and abrasive particles that have been treated with a compound.

Polishing composition and method utilizing abrasive particles treated with an aminosilane

Disclosed is a method of chemically-mechanically polishing a substrate. The method comprises, consists of, or consists essentially of (a) contacting a substrate containing at least one Group III-V material, with a polishing pad and a chemical-mechanical polishing composition comprising water, abrasive particles having a negative surface charge, and an oxidizing agent for oxidizing the Group III-V material in an amount of from about 0.01 wt. % to about 5 wt. %, wherein the polishing composition has a pH of from about 2 to about 5; (b) moving the polishing pad and the chemical-mechanical polishing composition relative to the substrate; and (c) abrading at least a portion of the substrate to polish the substrate. In some embodiments, the Group III-V material is a semiconductor that includes at least one element from Group III of the Periodic Table and at least one element from Group V of the Periodic Table.

Method of polishing group III-V materials

A chemical mechanical polishing (CMP) method for removal of a metal layer deposited over a titanium nitride (TiN) or titanium/titanium nitride (Ti/TiN) barrier layer is described herein. The method comprises abrading the metal layer with an acidic CMP composition to expose the underlying TiN or Ti/TiN layer, wherein the TiN or Ti/N layer is polished at a low rate due to the presence of a surfactant inhibitor. The acidic CMP composition comprises a particulate abrasive (e.g., silica, alumina) suspended in a liquid carrier containing a surfactant selected from the group consisting of an anionic surfactant, a nonionic surfactant, cation surfactants, and a combination thereof.

CMP method for suppression of titanium nitride and titanium/titanium nitride removal

The present invention provides an acidic aqueous polishing composition suitable for polishing a silicon nitride-containing substrate in a chemical-mechanical polishing (CMP) process. The composition, at point of use, preferably comprises about 0.01 to about 2 percent by weight of at least one particulate ceria abrasive, about 10 to about 1000 ppm of at least one non-polymeric unsaturated nitrogen heterocycle compound, 0 to about 1000 ppm of at least one cationic polymer, optionally, 0 to about 2000 ppm of at least one polyoxyalkylene polymer, and an aqueous carrier therefor. The cationic polymer preferably is selected from a poly(vinylpyridine) polymer, a quaternary ammonium-substituted acrylate polymer, a quaternary ammonium-substituted methacrylate polymer, or a combination thereof. Methods of polishing substrates and of selectively removing silicon nitride from a substrate in preference to removal of polysilicon using the compositions are also provided.

Compositions and methods for selective polishing of silicon nitride materials

A chemical mechanical polishing composition for polishing a substrate having a tungsten layer includes a water based liquid carrier, a colloidal silica abrasive dispersed in the liquid carrier and having a permanent positive charge of at least 6 mV, an amine compound in solution in the liquid carrier, and an iron containing accelerator. A method for chemical mechanical polishing a substrate including a tungsten layer includes contacting the substrate with the above described polishing composition, moving the polishing composition relative to the substrate, and abrading the substrate to remove a portion of the tungsten from the substrate and thereby polish the substrate.

Composition for tungsten CMP

The present invention provides a method for selectively removing silicon carbide from the surface of a substrate in preference to silicon dioxide. The method comprises abrading a surface of substrate with a polishing composition that comprises a particulate abrasive, at least one acidic buffering agent, and an aqueous carrier.

Method to selectively polish silicon carbide films

A chemical mechanical polishing composition for polishing a substrate having a tungsten layer includes a water based liquid carrier, a colloidal silica abrasive dispersed in the liquid carrier and having a permanent positive charge of at least 6 mV, and a polycationic amine compound in solution in the liquid carrier. A method for chemical mechanical polishing a substrate including a tungsten layer includes contacting the substrate with the above described polishing composition, moving the polishing composition relative to the substrate, and abrading the substrate to remove a portion of the tungsten from the substrate and thereby polish the substrate.

A chemical mechanical polishing composition for polishing a substrate having a tungsten layer includes a water based liquid carrier, a colloidal silica abrasive dispersed in the liquid carrier and having a permanent positive charge of at least 6 mV, an amine containing polymer in solution in the liquid carrier, and an iron containing accelerator. A method for chemical mechanical polishing a substrate including a tungsten layer includes contacting the substrate with the above described polishing composition, moving the polishing composition relative to the substrate, and abrading the substrate to remove a portion of the tungsten from the substrate and thereby polish the substrate.

The present invention provides a chemical mechanical polishing method for polishing a substrate comprising silicon dioxide, silicon nitride, and polysilicon. The method comprises abrading a surface of the substrate with a CMP composition to remove at least some silicon dioxide, silicon nitride and polysilicon therefrom. The CMP composition comprising a particulate ceria abrasive suspended in an aqueous carrier having a pH of about 3 to 9.5 and containing a cationic polymer; wherein the cationic polymer consists of a quaternary methacryloyloxyalkylammonium polymer.

Compositions and methods for CMP of silicon oxide, silicon nitride, and polysilicon materials

A chemical mechanical polishing composition for polishing a substrate having a tungsten layer includes a water based liquid carrier, first and second colloidal silica abrasives dispersed in the liquid carrier, and an iron containing accelerator. The first colloidal silica abrasive and the second colloidal silica abrasive each have a permanent positive charge of at least 10 mV. An average particle size of the second silica abrasive is at least 20 nanometers greater than an average particle size of the first silica abrasive. A method for chemical mechanical polishing a substrate including a tungsten layer is further disclosed. The method may include contacting the substrate with the above described polishing composition, moving the polishing composition relative to the substrate, and abrading the substrate to remove a portion of the tungsten from the substrate and thereby polish the substrate.

Mixed abrasive tungsten CMP composition

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Glen Ellyn, IL, United States of America

William J Ward