Patents by Inventor Alan Cheshire
Alan Cheshire has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9318341Abstract: Methods for etching a substrate in a plasma etch reactor may include (a) depositing polymer on surfaces of a feature formed in substrate disposed in the etch reactor using first reactive species formed from a first process gas comprising a polymer forming gas; (b) etching the bottom surface of the feature of the substrate in the etch reactor using a third reactive species formed from a third process gas including an etching gas; and (c) bombarding a bottom surface of the feature with a second reactive species formed from a second process gas comprising one or more of an inert gas, an oxidizing gas, a reducing gas, or the polymer forming gas while at least one of depositing the polymer to remove at least some of the polymer disposed on the bottom surface or etching the bottom surface to at least one of chemically or physically damage the bottom surface.Type: GrantFiled: November 29, 2011Date of Patent: April 19, 2016Assignee: APPLIED MATERIALS, INC.Inventors: Robert P. Chebi, Alan Cheshire, Gabriel Roupillard, Alfredo Granados
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Patent number: 8937017Abstract: Embodiments of the invention relate to a substrate etching method and apparatus. In one embodiment, a method for etching a substrate in a plasma etch reactor is provided that include flowing a backside process gas between a substrate and a substrate support assembly, and cyclically etching a layer on the substrate.Type: GrantFiled: January 29, 2010Date of Patent: January 20, 2015Assignee: Applied Materials, Inc.Inventors: Alan Cheshire, Stanley Detmar
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Patent number: 8298959Abstract: Embodiments of the invention relate to a substrate etching method and apparatus. In one embodiment, a method for etching a substrate in a plasma etch reactor is provided that includes a) depositing a polymer on a substrate in an etch reactor, b) etching the substrate using a gas mixture including a fluorine-containing gas and oxygen in the etch reactor, c) etching a silicon-containing layer the substrate using a fluorine-containing gas without mixing oxygen in the etch reactor, and d) repeating a), b) and c) until an endpoint of a feature etched into the silicon-containing layer is reached.Type: GrantFiled: May 24, 2010Date of Patent: October 30, 2012Assignee: Applied Materials, Inc.Inventor: Alan Cheshire
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Publication number: 20120208300Abstract: A substrate etching method and apparatus are disclosed. In one embodiment, a method for etching is provided that includes, in a plasma processing chamber, etching a feature in a silicon layer using an etch recipe that includes cyclical etching and deposition substeps until an end point is reached, wherein an aspect ratio of the feature increases with a number of cyclical etching and deposition substeps performed over time until the end point is reached; and adjusting a recipe variable of the etch recipe in response to the current aspect ratio of the feature during etching to manage thickness of sidewall polymers when the feature becomes deeper to avoid closing the feature and preventing subsequent etching.Type: ApplicationFiled: April 25, 2012Publication date: August 16, 2012Applicant: APPLIED MATERIALS, INC.Inventors: Alan Cheshire, Stanley Detmar
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Publication number: 20120152895Abstract: Methods for etching a substrate in a plasma etch reactor may include (a) depositing polymer on surfaces of a feature formed in substrate disposed in the etch reactor using first reactive species formed from a first process gas comprising a polymer forming gas; (b) etching the bottom surface of the feature of the substrate in the etch reactor using a third reactive species formed from a third process gas including an etching gas; and (c) bombarding a bottom surface of the feature with a second reactive species formed from a second process gas comprising one or more of an inert gas, an oxidizing gas, a reducing gas, or the polymer forming gas while at least one of depositing the polymer to remove at least some of the polymer disposed on the bottom surface or etching the bottom surface to at least one of chemically or physically damage the bottom surface.Type: ApplicationFiled: November 29, 2011Publication date: June 21, 2012Applicant: APPLIED MATERIALS, INC.Inventors: ROBERT P. CHEBI, ALAN CHESHIRE, GABRIEL ROUPILLARD, ALFREDO GRANADOS
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Publication number: 20120152900Abstract: Methods and apparatus for gas delivery into plasma processing chambers are provided herein. In some embodiments, an apparatus for processing a substrate includes a process chamber having a processing volume, a substrate support disposed in the processing volume, an inductively coupled plasma source to generate an electric field within the processing volume that includes one or more regions of local maxima in the magnitude of the electric field, and one or more gas injectors to selectively direct a predominant portion of a process gas flowed through the one or more gas injectors into the one or more regions of local maxima.Type: ApplicationFiled: November 29, 2011Publication date: June 21, 2012Applicant: APPLIED MATERIALS, INC.Inventors: ROBERT P. CHEBI, STANLEY DETMAR, ALAN CHESHIRE, GABRIEL ROUPILLARD, ALFREDO GRANADOS
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Publication number: 20120103524Abstract: Plasma processing apparatus that provide an asymmetric plasma distribution within the processing apparatus are provided herein. In some embodiments, a plasma processing apparatus may include a process chamber having a processing volume with a substrate support disposed therein; and a first RF coil disposed above the substrate support to couple RF energy into the processing volume, wherein an electric field generated by RF energy moving along the first RF coil is asymmetric about a central axis of the substrate support. In some embodiments, a pump port is disposed asymmetrically with respect to the processing volume to remove one or more gases from the processing volume. In some embodiments, the first RF coil is asymmetrically disposed about the central axis of the substrate support.Type: ApplicationFiled: September 22, 2011Publication date: May 3, 2012Applicant: APPLIED MATERIALS, INC.Inventors: Robert CHEBI, Alan CHESHIRE, Stanley DETMAR, Gabriel ROUPILLARD
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Publication number: 20100308014Abstract: Embodiments of the invention relate to a substrate etching method and apparatus. In one embodiment, a method for etching a substrate in a plasma etch reactor is provided that includes a) depositing a polymer on a substrate in an etch reactor, b) etching the substrate using a gas mixture including a fluorine-containing gas and oxygen in the etch reactor, c) etching a silicon-containing layer the substrate using a fluorine-containing gas without mixing oxygen in the etch reactor, and d) repeating a), b) and c) until an endpoint of a feature etched into the silicon-containing layer is reached.Type: ApplicationFiled: May 24, 2010Publication date: December 9, 2010Applicant: APPLIED MATERIALS, INC.Inventor: Alan Cheshire
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Publication number: 20100197138Abstract: Embodiments of the invention relate to a substrate etching method and apparatus. In one embodiment, a method for etching a substrate in a plasma etch reactor is provided that include flowing a backside process gas between a substrate and a substrate support assembly, and cyclically etching a layer on the substrate.Type: ApplicationFiled: January 29, 2010Publication date: August 5, 2010Applicant: APPLIED MATERIALS, INC.Inventors: Alan Cheshire, Stanley Detmar
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Patent number: 4086381Abstract: There is disclosed a bonded, nonwoven sheet of continuous isotactic polypropylene filaments having a nonselvage portion with specified properties rendering the sheet useful as a carpet backing, said properties including an average bond strength, for bonds having a strength greater than 0.1 gram, of at least 0.9 gram and less than the fiber breaking strength, the sheet being characterized by a selvage having an average bond strength which is from about 15-400% greater than the average bond strength of the non-selvage portion of said sheet. There is also disclosed a process for producing said sheet.Type: GrantFiled: March 30, 1977Date of Patent: April 25, 1978Assignee: E. I. Du Pont de Nemours and CompanyInventors: David Alan Cheshire, Samir Costandi Debbas, Richard Thomas Eger, Ken Stephen Schermacher, Paul Thomas Twohig