Patents by Inventor Sudhanshu Misra

Sudhanshu Misra 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: 20230143013
    Abstract: Examples are disclosed that relate to planarizing substrates without use of an abrasive. One example provides a method of chemically planarizing a substrate, the method comprising introducing an abrasive-free planarization solution onto a porous pad, contacting the substrate with the porous pad while moving the porous pad and substrate relative to one another such that higher portions of the substrate contact the porous pad and lower portions of the substrate do not contact the porous pad, and removing material from the higher portions of the substrate via contact with the porous pad to reduce a height of the higher portions of the substrate relative to the lower portions of the substrate.
    Type: Application
    Filed: December 30, 2022
    Publication date: May 11, 2023
    Inventors: Sudhanshu Misra, Suryadevara Babu
  • Publication number: 20230077988
    Abstract: Examples are disclosed that relate to planarizing substrates without use of an abrasive. One example provides a method of chemically planarizing a substrate, the method comprising introducing an abrasive-free planarization solution onto a porous pad, contacting the substrate with the porous pad while moving the porous pad and substrate relative to one another such that higher portions of the substrate contact the porous pad and lower portions of the substrate do not contact the porous pad, and removing material from the higher portions of the substrate via contact with the porous pad to reduce a height of the higher portions of the substrate relative to the lower portions of the substrate. In some examples, linear motion may be used for chemically planarizing.
    Type: Application
    Filed: August 31, 2022
    Publication date: March 16, 2023
    Inventors: Sudhanshu Misra, Suryadevara Babu
  • Patent number: 11545365
    Abstract: Examples are disclosed that relate to planarizing substrates without use of an abrasive. One example provides a method of chemically planarizing a substrate, the method comprising introducing an abrasive-free planarization solution onto a porous pad, contacting the substrate with the porous pad while moving the porous pad and substrate relative to one another such that higher portions of the substrate contact the porous pad and lower portions of the substrate do not contact the porous pad, and removing material from the higher portions of the substrate via contact with the porous pad to reduce a height of the higher portions of the substrate relative to the lower portions of the substrate.
    Type: Grant
    Filed: May 13, 2020
    Date of Patent: January 3, 2023
    Assignee: CHEMPOWER CORPORATION
    Inventors: Sudhanshu Misra, Suryadevara Babu
  • Publication number: 20220355439
    Abstract: A method comprises planarizing a substrate material with a functionalized chemical planarization pad. The functionalized chemical planarization pad includes a plurality of functional groups bonded to a material of the pad. The functional groups are configured to chemically react with the substrate material such that a portion of substrate material bonds to the functional groups. The pad is regenerated by applying a regeneration solution configured to break bonds between the functional groups and substrate material bonded to the functional groups to form removed material. The removed material is complexed in a dissolved complexing agent to form dissolved material in an effluent phase.
    Type: Application
    Filed: April 26, 2022
    Publication date: November 10, 2022
    Inventors: Sudhanshu Misra, Babu Suryadevara
  • Publication number: 20200365412
    Abstract: Examples are disclosed that relate to planarizing substrates without use of an abrasive. One example provides a method of chemically planarizing a substrate, the method comprising introducing an abrasive-free planarization solution onto a porous pad, contacting the substrate with the porous pad while moving the porous pad and substrate relative to one another such that higher portions of the substrate contact the porous pad and lower portions of the substrate do not contact the porous pad, and removing material from the higher portions of the substrate via contact with the porous pad to reduce a height of the higher portions of the substrate relative to the lower portions of the substrate.
    Type: Application
    Filed: May 13, 2020
    Publication date: November 19, 2020
    Inventors: Sudhanshu Misra, Suryadevara Babu
  • Patent number: 10220487
    Abstract: The present application relates to polishing pads for chemical mechanical planarization (CMP) of substrates, and methods of fabrication and use thereof. The pads described in this invention are customized to polishing specifications where specifications include (but not limited to) to the material being polished, chip design and architecture, chip density and pattern density, equipment platform and type of slurry used. These pads can be designed with a specialized polymeric nano-structure with a long or short range order which allows for molecular level tuning achieving superior thermo-mechanical characteristics. More particularly, the pads can be designed and fabricated so that there is both uniform and nonuniform spatial distribution of chemical and physical properties within the pads.
    Type: Grant
    Filed: February 12, 2016
    Date of Patent: March 5, 2019
    Assignee: Cabot Microelectronics Corporation
    Inventors: Pradip K. Roy, Manish Deopura, Sudhanshu Misra
  • Publication number: 20160229025
    Abstract: The present application relates to polishing pads for chemical mechanical planarization (CMP) of substrates, and methods of fabrication and use thereof. The pads described in this invention are customized to polishing specifications where specifications include (but not limited to) to the material being polished, chip design and architecture, chip density and pattern density, equipment platform and type of slurry used. These pads can be designed with a specialized polymeric nano-structure with a long or short range order which allows for molecular level tuning achieving superior thermo-mechanical characteristics. More particularly, the pads can be designed and fabricated so that there is both uniform and nonuniform spatial distribution of chemical and physical properties within the pads.
    Type: Application
    Filed: February 12, 2016
    Publication date: August 11, 2016
    Inventors: Pradip K. ROY, Manish DEOPURA, Sudhanshu MISRA
  • Patent number: 9375823
    Abstract: CMP pads having novel groove configurations are described. For example, described herein are CMP pads comprising primary grooves, secondary grooves, a groove pattern center, and an optional terminal groove. The CMP pads may be made from polyurethane or poly (urethane-urea), and the grooves produced therein may be made by a method from the group consisting of molding, laser writing, water jet cutting, 3-D printing, thermoforming, vacuum forming, micro-contact printing, hot stamping, and mixtures thereof.
    Type: Grant
    Filed: October 2, 2015
    Date of Patent: June 28, 2016
    Assignee: NexPlanar Corporation
    Inventors: Robert Kerprich, Karey Holland, Diane Scott, Sudhanshu Misra
  • Patent number: 9278424
    Abstract: The present application relates to polishing pads for chemical mechanical planarization (CMP) of substrates, and methods of fabrication and use thereof. The pads described in this invention are customized to polishing specifications where specifications include (but not limited to) to the material being polished, chip design and architecture, chip density and pattern density, equipment platform and type of slurry used. These pads can be designed with a specialized polymeric nano-structure with a long or short range order which allows for molecular level tuning achieving superior themo-mechanical characteristics. More particularly, the pads can be designed and fabricated so that there is both uniform and nonuniform spatial distribution of chemical and physical properties within the pads.
    Type: Grant
    Filed: September 17, 2014
    Date of Patent: March 8, 2016
    Assignee: NexPlanar Corporation
    Inventors: Pradip K Roy, Manish Deopura, Sudhanshu Misra
  • Patent number: 9272388
    Abstract: Described herein are polishing apparatus, polishing formulations, and polymeric substrates for use in polishing surfaces, and related methods. The apparatus, formulations, substrates, and methods may each be used in applications involving the polishing of metal and/or metal-containing surfaces such as semiconductor wafers. The apparatus, formulations, polymeric substrates, and related methods described herein may be used without abrasives, and in some instances, without mechanical friction of a pad surface against the surface to be polished. Therefore, defects on a polished surface due to such mechanical polishing processes may be reduced.
    Type: Grant
    Filed: February 1, 2013
    Date of Patent: March 1, 2016
    Assignee: NexPlanar Corporation
    Inventor: Sudhanshu Misra
  • Publication number: 20160023321
    Abstract: CMP pads having novel groove configurations are described. For example, described herein are CMP pads comprising primary grooves, secondary grooves, a groove pattern center, and an optional terminal groove. The CMP pads may be made from polyurethane or poly (urethane-urea), and the grooves produced therein may be made by a method from the group consisting of molding, laser writing, water jet cutting, 3-D printing, thermoforming, vacuum forming, micro-contact printing, hot stamping, and mixtures thereof.
    Type: Application
    Filed: October 2, 2015
    Publication date: January 28, 2016
    Inventors: Robert Kerprich, Karey Holland, Diane Scott, Sudhanshu Misra
  • Patent number: 9180570
    Abstract: CMP pads having novel groove configurations are described. For example, described herein are CMP pads comprising primary grooves, secondary grooves, a groove pattern center, and an optional terminal groove. The CMP pads may be made from polyurethane or poly (urethane-urea), and the grooves produced therein may be made by a method from the group consisting of molding, laser writing, water jet cutting, 3-D printing, thermoforming, vacuum forming, micro-contact printing, hot stamping, and mixtures thereof.
    Type: Grant
    Filed: March 16, 2009
    Date of Patent: November 10, 2015
    Assignee: NexPlanar Corporation
    Inventors: Robert Kerprich, Karey Holland, Diane Scott, Sudhanshu Misra
  • Publication number: 20150065020
    Abstract: The present application relates to polishing pads for chemical mechanical planarization (CMP) of substrates, and methods of fabrication and use thereof. The pads described in this invention are customized to polishing specifications where specifications include (but not limited to) to the material being polished, chip design and architecture, chip density and pattern density, equipment platform and type of slurry used. These pads can be designed with a specialized polymeric nano-structure with a long or short range order which allows for molecular level tuning achieving superior themo-mechanical characteristics. More particularly, the pads can be designed and fabricated so that there is both uniform and nonuniform spatial distribution of chemical and physical properties within the pads.
    Type: Application
    Filed: September 17, 2014
    Publication date: March 5, 2015
    Inventors: Pradip K. Roy, Manish Deopura, Sudhanshu Misra
  • Patent number: 8864859
    Abstract: The present application relates to polishing pads for chemical mechanical planarization (CMP) of substrates, and methods of fabrication and use thereof. The pads described in this invention are customized to polishing specifications where specifications include (but not limited to) to the material being polished, chip design and architecture, chip density and pattern density, equipment platform and type of slurry used. These pads can be designed with a specialized polymeric nano-structure with a long or short range order which allows for molecular level tuning achieving superior thermo-mechanical characteristics. More particularly, the pads can be designed and fabricated so that there is both uniform and nonuniform spatial distribution of chemical and physical properties within the pads.
    Type: Grant
    Filed: November 28, 2007
    Date of Patent: October 21, 2014
    Assignee: NexPlanar Corporation
    Inventors: Pradip K. Roy, Manish Deopura, Sudhanshu Misra
  • Patent number: 8715035
    Abstract: The present application relates to polishing pads for chemical mechanical planarization (CMP) of substrates, and methods of fabrication and use thereof. The pads described in this invention are customized to polishing specifications where specifications include (but not limited to) to the material being polished, chip design and architecture, chip density and pattern density, equipment platform and type of slurry used. These pads can be designed with a specialized polymeric nano-structure with a long or short range order which allows for molecular level tuning achieving superior thermo-mechanical characteristics. More particularly, the pads can be designed and fabricated so that there is both uniform and nonuniform spatial distribution of chemical and physical properties within the pads.
    Type: Grant
    Filed: February 21, 2006
    Date of Patent: May 6, 2014
    Assignee: NexPlanar Corporation
    Inventors: Pradip K. Roy, Manish Deopura, Sudhanshu Misra
  • Publication number: 20130149945
    Abstract: Described herein are polishing apparatus, polishing formulations, and polymeric substrates for use in polishing surfaces, and related methods. The apparatus, formulations, substrates, and methods may each be used in applications involving the polishing of metal and/or metal-containing surfaces such as semiconductor wafers. The apparatus, formulations, polymeric substrates, and related methods described herein may be used without abrasives, and in some instances, without mechanical friction of a pad surface against the surface to be polished. Therefore, defects on a polished surface due to such mechanical polishing processes may be reduced.
    Type: Application
    Filed: February 1, 2013
    Publication date: June 13, 2013
    Inventor: Sudhanshu Misra
  • Patent number: 8383003
    Abstract: Described herein are polishing apparatus, polishing formulations, and polymeric substrates for use in polishing surfaces, and related methods. The apparatus, formulations, substrates, and methods may each be used in applications involving the polishing of metal and/or metal-containing surfaces such as semiconductor wafers. The apparatus, formulations, polymeric substrates, and related methods described herein may be used without abrasives, and in some instances, without mechanical friction of a pad surface against the surface to be polished. Therefore, defects on a polished surface due to such mechanical polishing processes may be reduced.
    Type: Grant
    Filed: June 18, 2009
    Date of Patent: February 26, 2013
    Assignee: NexPlanar Corporation
    Inventor: Sudhanshu Misra
  • Patent number: 8380339
    Abstract: A polishing pad for chemical mechanical planarization of a film on a substrate is customized by obtaining one or more characteristics of a structure on a substrate. For example, when the structure is a chip formed on a semiconductor wafer, the one or more characteristics of the structure can include chip size, pattern density, chip architecture, film material, film topography, and the like. Based on the one or more characteristics of the structure, a value for the one or more chemical or physical properties of the pad is selected. For example, the one or more chemical or physical properties of the pad can include pad material hardness, thickness, surface grooving, pore size, porosity, Youngs modulus, compressibility, asperity, and the like.
    Type: Grant
    Filed: April 26, 2010
    Date of Patent: February 19, 2013
    Assignee: NexPlanar Corporation
    Inventors: Sudhanshu Misra, Pradip K. Roy
  • Publication number: 20100273398
    Abstract: A polishing pad for chemical mechanical planarization of a film on a substrate is customized by obtaining one or more characteristics of a structure on a substrate. For example, when the structure is a chip formed on a semiconductor wafer, the one or more characteristics of the structure can include chip size, pattern density, chip architecture, film material, film topography, and the like. Based on the one or more characteristics of the structure, a value for the one or more chemical or physical properties of the pad is selected. For example, the one or more chemical or physical properties of the pad can include pad material hardness, thickness, surface grooving, pore size, porosity, Youngs modulus, compressibility, asperity, and the like.
    Type: Application
    Filed: April 26, 2010
    Publication date: October 28, 2010
    Inventors: Sudhanshu Misra, Pradip K. Roy
  • Patent number: 7704122
    Abstract: A polishing pad for chemical mechanical planarization of a film on a substrate is customized by obtaining one or more characteristics of a structure on a substrate. For example, when the structure is a chip formed on a semiconductor wafer, the one or more characteristics of the structure can include chip size, pattern density, chip architecture, film material, film topography, and the like. Based on the one or more characteristics of the structure, a value for the one or more chemical or physical properties of the pad is selected. For example, the one or more chemical or physical properties of the pad can include pad material hardness, thickness, surface grooving, pore size, porosity, Youngs modulus, compressibility, asperity, and the like.
    Type: Grant
    Filed: November 28, 2007
    Date of Patent: April 27, 2010
    Assignee: NexPlanar Corporation
    Inventors: Sudhanshu Misra, Pradip K. Roy