Patents by Inventor Ashwin CHOCKALINGAM

Ashwin CHOCKALINGAM 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).

  • Publication number: 20190039204
    Abstract: Embodiments of the present disclosure provide for abrasive delivery (AD) polishing pads and manufacturing methods thereof. In one embodiment, a method of forming a polishing article includes forming a sub-polishing element from a first curable resin precursor composition and forming a plurality of polishing elements extending from the sub-polishing element. Forming the plurality of polishing elements includes forming a continuous polymer phase from a second curable resin precursor composition and forming a plurality of discontinuous abrasive delivery features disposed within the continuous polymer phase. The sub-polishing element is formed by dispensing a first plurality of droplets of the first curable resin precursor composition. The plurality polishing elements are formed by dispensing a second plurality of droplets of the second curable resin precursor composition.
    Type: Application
    Filed: July 30, 2018
    Publication date: February 7, 2019
    Inventors: Ashwin CHOCKALINGAM, Rajeev BAJAJ, Ashavani KUMAR, Daniel REDFIELD
  • Publication number: 20190030678
    Abstract: Embodiments described herein relate to integrated abrasive (IA) polishing pads, and methods of manufacturing IA polishing pads using, at least in part, surface functionalized abrasive particles in an additive manufacturing process, such as a 3D inkjet printing process. In one embodiment, a method of forming a polishing article includes dispensing a first plurality of droplets of a first precursor, curing the first plurality of droplets to form a first layer comprising a portion of a sub-polishing element, dispensing a second plurality of droplets of the first precursor and a second precursor onto the first layer, and curing the second plurality of droplets to form a second layer comprising portions of the sub-polishing element and portions of a plurality of polishing elements. Here, the second precursor includes functionalized abrasive particles having a polymerizable group chemically bonded to surfaces thereof.
    Type: Application
    Filed: July 23, 2018
    Publication date: January 31, 2019
    Inventors: Ashavani KUMAR, Ashwin CHOCKALINGAM, Sivapackia GANAPATHIAPPAN, Rajeev BAJAJ, Boyi FU, Daniel REDFIELD, Nag B. PATIBANDLA, Mario Dagio CORNEJO, Amritanshu SINHA, Yan ZHAO, Ranga Rao ARNEPALLI, Fred C. REDEKER
  • Publication number: 20170259499
    Abstract: A method and apparatus for manufacturing polishing articles used in polishing processes are provided. In one implementation, a method of forming a polishing pad is provided. The method comprises depositing an uncured first layer of a pad forming photopolymer on a substrate. The method further comprises positioning a first optical mask over the first layer of the uncured pad forming photopolymer. The first optical mask includes a patterned sheet of material having at least one aperture. The method further comprises exposing the uncured first layer of the pad forming photopolymer to electromagnetic radiation to selectively polymerize exposed portions of the uncured first layer of the pad forming photopolymer to form pad-supporting structures within the first layer of pad forming photopolymer.
    Type: Application
    Filed: March 7, 2017
    Publication date: September 14, 2017
    Inventors: Hou T. NG, Nag B. PATIBANDLA, Rajeev BAJAJ, Daniel REDFIELD, Ashwin CHOCKALINGAM, Mayu YAMAMURA, Mario CORNEJO
  • Publication number: 20170203408
    Abstract: Embodiments of the present disclosure relate to advanced polishing pads with tunable chemical, material and structural properties, and new methods of manufacturing the same. According to one or more embodiments of the disclosure, it has been discovered that a polishing pad with improved properties may be produced by an additive manufacturing process, such as a three-dimensional (3D) printing process. Embodiments of the present disclosure thus may provide an advanced polishing pad that has discrete features and geometries, formed from at least two different materials that include functional polymers, functional oligomers, reactive diluents, addition polymer precursor compounds, catalysts, and curing agents.
    Type: Application
    Filed: October 6, 2016
    Publication date: July 20, 2017
    Inventors: Sivapackia GANAPATHIAPPAN, Boyi FU, Ashwin CHOCKALINGAM, Daniel REDFIELD, Rajeev BAJAJ, Mahendra C. ORILALL, Hou T. NG, Jason G. FUNG, Mayu YAMAMURA
  • Publication number: 20170136603
    Abstract: Embodiments of the present disclosure relate to advanced polishing pads with tunable chemical, material and structural properties, and new methods of manufacturing the same. According to one or more embodiments of the disclosure, it has been discovered that a polishing pad with improved properties may be produced by an additive manufacturing process, such as a three-dimensional (3D) printing process. Embodiments of the present disclosure thus may provide an advanced polishing pad that has discrete features and geometries, formed from at least two different materials that include functional polymers, functional oligomers, reactive diluents, addition polymer precursor compounds, catalysts, and curing agents.
    Type: Application
    Filed: November 16, 2016
    Publication date: May 18, 2017
    Inventors: Sivapackia GANAPATHIAPPAN, Boyi FU, Ashwin CHOCKALINGAM, Daniel REDFIELD, Rajeev BAJAJ, Mahendra C. ORILALL, Hou T. NG, Jason G. FUNG, Mayu YAMAMURA
  • Publication number: 20170120416
    Abstract: Implementations described herein generally relate to polishing articles and methods of manufacturing polishing articles used in polishing processes and cleaning processes. More particularly, implementations disclosed herein relate to composite polishing articles having graded properties. In one implementation, a polishing article is provided. The polishing article comprises one or more exposed first regions formed from a first material and having a first zeta potential and one or more second exposed regions formed from a second material and having a second zeta potential, wherein the first zeta potential is different from the second zeta potential.
    Type: Application
    Filed: October 20, 2016
    Publication date: May 4, 2017
    Inventors: Ashwin CHOCKALINGAM, Mahendra C. ORILALL, Mayu YAMAMURA, Boyi FU, Rajeev BAJAJ, Daniel REDFIELD
  • Publication number: 20170100817
    Abstract: Embodiments of the present disclosure relate to advanced polishing pads with tunable chemical, material and structural properties, and new methods of manufacturing the same. According to one or more embodiments of the disclosure, it has been discovered that a polishing pad with improved properties may be produced by an additive manufacturing process, such as a three-dimensional (3D) printing process. Embodiments of the present disclosure thus may provide an advanced polishing pad that has discrete features and geometries, formed from at least two different materials that include functional polymers, functional oligomers, reactive diluents, addition polymer precursor compounds, catalysts, and curing agents.
    Type: Application
    Filed: October 17, 2016
    Publication date: April 13, 2017
    Inventors: Sivapackia GANAPATHIAPPAN, Boyi FU, Ashwin CHOCKALINGAM, Daniel REDFIELD, Rajeev BAJAJ, Mahendra C. ORILALL, Hou T. NG, Jason G. FUNG, Mayu YAMAMURA
  • Publication number: 20160136787
    Abstract: Embodiments of the present disclosure relate to advanced polishing pads with tunable chemical, material and structural properties, and new methods of manufacturing the same. According to one or more embodiments of the disclosure, it has been discovered that a polishing pad with improved properties may be produced by an additive manufacturing process, such as a three-dimensional (3D) printing process. Embodiments of the present disclosure thus may provide an advanced polishing pad that has discrete features and geometries, formed from at least two different materials that include functional polymers, functional oligomers, reactive diluents, and curing agents. For example, the advanced polishing pad may be formed from a plurality of polymeric layers, by the automated sequential deposition of at least one resin precursor composition followed by at least one curing step, wherein each layer may represent at least one polymer composition, and/or regions of different compositions.
    Type: Application
    Filed: January 20, 2016
    Publication date: May 19, 2016
    Inventors: Rajeev Bajaj, Daniel Redfield, Mahendra C. Orilall, Boyi Fu, Ashwin Chockalingam
  • Publication number: 20160114458
    Abstract: Embodiments of the present disclosure relate to advanced polishing pads with tunable chemical, material and structural properties, and new methods of manufacturing the same. According to one or more embodiments of the disclosure, it has been discovered that a polishing pad with improved properties may be produced by an additive manufacturing process, such as a three-dimensional (3D) printing process. Embodiments of the present disclosure thus may provide an advanced polishing pad that has discrete features and geometries, formed from at least two different materials that include functional polymers, functional oligomers, reactive diluents, and curing agents. For example, the advanced polishing pad may be formed from a plurality of polymeric layers, by the automated sequential deposition of at least one resin precursor composition followed by at least one curing step, wherein each layer may represent at least one polymer composition, and/or regions of different compositions.
    Type: Application
    Filed: October 22, 2015
    Publication date: April 28, 2016
    Inventors: Rajeev BAJAJ, Daniel REDFIELD, Mahendra C. ORILALL, Boyi FU, Aniruddh KHANNA, Jason G. FUNG, Mario CORNEJO, Ashwin CHOCKALINGAM, Mayu YAMAMURA, Veera Raghava REDDY, Ashavani KUMAR, Venkatachalam HARIHARAN, Gregory E. MENK, Fred C. REDEKER, Nag B. PATIBANDLA, Hou T. NG, Robert E. DAVENPORT, Amritanshu SINHA
  • Publication number: 20160107295
    Abstract: Embodiments of the present disclosure relate to advanced polishing pads with tunable chemical, material and structural properties, and new methods of manufacturing the same. According to one or more embodiments of the disclosure, it has been discovered that a polishing pad with improved properties may be produced by an additive manufacturing process, such as a three-dimensional (3D) printing process. Embodiments of the present disclosure thus may provide an advanced polishing pad that has discrete features and geometries, formed from at least two different materials that include functional polymers, functional oligomers, reactive diluents, and curing agents. For example, the advanced polishing pad may be formed from a plurality of polymeric layers, by the automated sequential deposition of at least one resin precursor composition followed by at least one curing step, wherein each layer may represent at least one polymer composition, and/or regions of different compositions.
    Type: Application
    Filed: October 16, 2015
    Publication date: April 21, 2016
    Inventors: Rajeev BAJAJ, Daniel REDFIELD, Mahendra C. ORILALL, Boyi FU, Aniruddh KHANNA, Jason G. FUNG, Mario CORNEJO, Ashwin CHOCKALINGAM, Mayu YAMAMURA, Veera Raghava Reddy KAKIREDDY, Ashavani KUMAR, Venkatachalam HARIHARAN, Gregory E. MENK, Fred C. REDEKER, Nag B. PATIBANDLA, Hou T. NG, Robert E. DAVENPORT, Amritanshu SINHA
  • Publication number: 20160107287
    Abstract: Embodiments of the present disclosure relate to advanced polishing pads with tunable chemical, material and structural properties, and new methods of manufacturing the same. According to one or more embodiments of the disclosure, it has been discovered that a polishing pad with improved properties may be produced by an additive manufacturing process, such as a three-dimensional (3D) printing process. Embodiments of the present disclosure thus may provide an advanced polishing pad that has discrete features and geometries, formed from at least two different materials that include functional polymers, functional oligomers, reactive diluents, and curing agents. For example, the advanced polishing pad may be formed from a plurality of polymeric layers, by the automated sequential deposition of at least one resin precursor composition followed by at least one curing step, wherein each layer may represent at least one polymer composition, and/or regions of different compositions.
    Type: Application
    Filed: October 19, 2015
    Publication date: April 21, 2016
    Inventors: Rajeev BAJAJ, Daniel REDFIELD, Mahendra C. ORILALL, Boyi FU, Aniruddh KHANNA, Jason G. FUNG, Mario CORNEJO, Ashwin CHOCKALINGAM, Mayu YAMAMURA, Veera Raghava Reddy KAKIREDDY, Ashavani KUMAR, Venkatachalam HARIHARAN, Gregory E. MENK, Fred C. REDEKER, Nag B. PATIBANDLA, Hou T. NG, Robert E. DAVENPORT, Amritanshu SINHA