Patents by Inventor Grant Willson

Grant Willson 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).

  • Patent number: 9120117
    Abstract: A diblock copolymer system that self-assembles at very low molecular weights to form very small features is described. One polymer in the block copolymer contains silicon, and the other polymer is a polylactide. The block copolymer may be synthesized by a combination of anionic and ring opening polymerization reactions. This block copolymer may form nanoporous materials that can be used as etch masks in lithographic patterning.
    Type: Grant
    Filed: February 7, 2013
    Date of Patent: September 1, 2015
    Assignee: Board of Regents, The University of Texas System
    Inventors: Christopher John Ellison, Carlton Grant Willson, Julia Cushen, Christopher M. Bates
  • Publication number: 20150240110
    Abstract: The present invention relates to a method the synthesis and utilization of random, cross-linked, substituted polystyrene copolymers as polymeric cross-linked surface treatments (PXSTs) to control the orientation of physical features of a block copolymer deposited over the first copolymer. Such methods have many uses including multiple applications in the semi-conductor industry including production of templates for nanoimprint lithography.
    Type: Application
    Filed: April 28, 2015
    Publication date: August 27, 2015
    Inventors: Carlton Grant Willson, Christopher M. Bates, Jeffrey Strahan, Christopher J. Ellison
  • Publication number: 20150232689
    Abstract: The present invention uses vacuum deposited thin films of material to create an interface that non-preferentially interacts with different domains of an underlying block copolymer film. The non-preferential interface prevents formation of a wetting layer and influences the orientation of domains in the block copolymer. The purpose of the deposited polymer is to produce nanostructured features in a block copolymer film that can serve as lithographic patterns.
    Type: Application
    Filed: April 28, 2015
    Publication date: August 20, 2015
    Inventors: Carlton Grant Willson, William J. Durand, Christopher John Ellison, Christopher M. Bates, Takehiro Seshimo, Julia Cushen, Logan J. Santos, Leon Dean, Erica L. Rausch
  • Patent number: 9040121
    Abstract: Vacuum deposited thin films of material are described to create an interface that non-preferentially interacts with different domains of an underlying block copolymer film. The non-preferential interface prevents formation of a wetting layer and influences the orientation of domains in the block copolymer. The purpose of the deposited polymer is to produce nanostructured features in a block copolymer film that can serve as lithographic patterns.
    Type: Grant
    Filed: February 7, 2013
    Date of Patent: May 26, 2015
    Assignee: Board of Regents The University of Texas System
    Inventors: C. Grant Willson, William Durand, Christopher John Ellison, Christopher Bates, Takehiro Seshimo, Julia Cushen, Logan Santos, Leon Dean, Erica Rausch
  • Patent number: 8926888
    Abstract: An imprint lithography release agent having general formula (1): where R1 represents H or CH3, n is an integer from 1 to 5, and m is an integer from 1 to 40. Fluorinated silazanes of general formula (1) can be used to form a release layer on an imprint lithography template, added to an imprint lithography resist, or both.
    Type: Grant
    Filed: February 24, 2012
    Date of Patent: January 6, 2015
    Assignee: Board of Regents, The University of Texas System
    Inventors: Carlton Grant Willson, Tsuyoshi Ogawa, Michael W. Lin, Daniel J. Hellebusch, B. Michael Jacobsson, William K. Bell
  • Publication number: 20140342291
    Abstract: Dual tone photoresist formulations comprising a photoacid generator are described and employed in fabrication techniques, including methods of making structures on substrates, and more particularly, methods of making electronic devices (e.g. transistors and the like) on flexible substrates wherein two patterns are formed simultaneously in one layer of photoresist.
    Type: Application
    Filed: April 1, 2014
    Publication date: November 20, 2014
    Applicant: Board of Regents, The University of Texas System
    Inventors: C. Grant Willson, Wei-Lun Kane Jen, Brandon Mark Rawlings, Jeffrey Ryan Strahan
  • Publication number: 20130344242
    Abstract: The use of self-assembled block copolymer structures to produce advanced lithographic patterns relies on control of the orientation of these structures in thin films. In particular, orientation of cylinders and lamellae perpendicular to the plane of the block copolymer film is required for most applications. The preferred method to achieve orientation is by heating. The present invention involves the use of polarity-switching top coats to control block copolymer thin film orientation by heating. The top coats can be spin coated onto block copolymer thin films from polar casting solvents and they change composition upon thermal annealing to become “neutral”. Top coats allow for the facile orientation control of block copolymers which would otherwise not be possible by heating alone.
    Type: Application
    Filed: June 19, 2013
    Publication date: December 26, 2013
    Inventors: Carlton Grant Willson, Christopher John Ellison, Takehiro Seshimo, Julia Cushen, Christopher M. Bates, Leon Dean, Logan J. Santos, Erica L. Rausch, Michael Maher
  • Publication number: 20130281713
    Abstract: The present invention describes branched and functionalized siloxanes and methods for making such compounds. The compounds have a variety of uses. One preferred application is as novel planarizing material for lithography, in which case functionalized branched siloxane, such as an epoxy-modified branched siloxane is particularly useful.
    Type: Application
    Filed: February 16, 2011
    Publication date: October 24, 2013
    Applicant: Board of Regents The University of Texas System
    Inventors: Grant Willson, Tsuyoshi Ogawa, MIchael B. Jacobsson
  • Publication number: 20130266780
    Abstract: The present invention includes a diblock copolymer system that self-assembles at very low molecular weights to form very small features. In one embodiment, one polymer in the block copolymer contains silicon, and the other polymer is a polylactide. In one embodiment, the block copolymer is synthesized by a combination of anionic and ring opening polymerization reactions. In one embodiment, the purpose of this block copolymer is to form nanoporous materials that can be used as etch masks in lithographic patterning.
    Type: Application
    Filed: February 7, 2013
    Publication date: October 10, 2013
    Inventors: Christopher John Ellison, Carlton Grant Willson, Julia Cushen, Christopher M. Bates
  • Publication number: 20130209757
    Abstract: The present invention uses vacuum deposited thin films of material to create an interface that non-preferentially interacts with different domains of an underlying block copolymer film. The non-preferential interface prevents formation of a wetting layer and influences the orientation of domains in the block copolymer. The purpose of the deposited polymer is to produce nanostructured features in a block copolymer film that can serve as lithographic patterns.
    Type: Application
    Filed: February 7, 2013
    Publication date: August 15, 2013
    Inventors: Carlton Grant Willson, William J. Durand, Christopher John Ellison, Christopher M. Bates, Takehiro Seshimo, Julia Cushen, Logan J. Santos, Leon Dean, Erica L. Rausch
  • Publication number: 20130196019
    Abstract: The present invention describes the synthesis of silicon-containing monomers and copolymers. The synthesis of a monomer, trimethyl-(2-methylenebut-3-enyl)silane (TMSI) and subsequent synthesis of diblock copolymer with styrene, forming polystyrene-block-polytrimethylsilyl isoprene, and synthesis of diblock copolymer Polystyrene-block-polymethacryloxymethyltrimethylsilane or PS-b-P(MTMSMA). These silicon containing diblock copolymers have a variety of uses. One preferred application is as novel imprint template material with sub-100 nm features for lithography.
    Type: Application
    Filed: March 17, 2011
    Publication date: August 1, 2013
    Applicant: National University of Sinapore
    Inventors: C. Grant Willson, Christopher M. Bates, Jeffrey Strahan, Christopher John Ellison, Brennen Mueller
  • Publication number: 20130045361
    Abstract: The present invention relates to a method the synthesis and utilization of random, cross-linked, substituted polystyrene copolymers as polymeric cross-linked surface treatments (PXSTs) to control the orientation of physical features of a block copolymer deposited over the first copolymer. Such methods have many uses including multiple applications in the semi-conductor industry including production of templates for nanoimprint lithography.
    Type: Application
    Filed: March 17, 2011
    Publication date: February 21, 2013
    Inventors: C. Grant Willson, Christopher M. Bates, Jeffrey Strahan, Christopher John Ellison
  • Publication number: 20130022785
    Abstract: The present invention discloses diblock copolymer systems that self-assemble to produce very small structures. These co-polymers consist of one block that contains silicon and another block comprised of an oligosaccharide that are coupled by azide-alkyne cycloaddition.
    Type: Application
    Filed: June 20, 2012
    Publication date: January 24, 2013
    Inventors: Christopher John Ellison, Julia Cushen, Issei Otsuka, C. Grant Willson, Christopher M. Bates, Jeffery Alan Easley, Redouane Borsali, Sebastien Fort, Sami Halila
  • Publication number: 20120217676
    Abstract: An imprint lithography release agent having general formula (1): where R1 represents H or CH3, n is an integer from 1 to 5, and m is an integer from 1 to 40. Fluorinated silazanes of general formula (1) can be used to form a release layer on an imprint lithography template, added to an imprint lithography resist, or both.
    Type: Application
    Filed: February 24, 2012
    Publication date: August 30, 2012
    Applicant: BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM
    Inventors: Carlton Grant Willson, Tsuyoshi Ogawa, Michael W. Lin, Daniel J. Hellebusch, B. Michael Jacobsson, William K. Bell
  • Publication number: 20120194671
    Abstract: A system and method for recognition of images may include the use of alignment markers. The image recognized may be a pattern from an array, a character, a number, a shape, and/or irregular shapes. The pattern may be formed by elements in an array such as an identification marking and/or a sensor array. More particularly, the system and method relate to discriminating between images by accounting for the orientation of the image. The size and/or location of alignment markers may provide information about the orientation of an image. Information about the orientation of an image may reduce false recognitions. The system and method of image recognition may be used with identification markings, biosensors, micro-fluidic arrays, and/or optical character recognition systems.
    Type: Application
    Filed: January 31, 2011
    Publication date: August 2, 2012
    Inventors: Jason E. Meiring, Timothy B. Michaelson, C. Grant Willson
  • Publication number: 20120133078
    Abstract: A method of forming a relief image in a structure comprising a substrate and a transfer layer formed thereon comprises covering the transfer layer with a polymerizable fluid composition, and then contacting the polymerizable fluid composition with a mold having a relief structure formed therein such that the polymerizable fluid composition fills the relief structure in the mold. The polymerizable fluid composition is subjected to conditions to polymerize polymerizable fluid composition and form a solidified polymeric material therefrom on the transfer layer. The mold is then separated from the solid polymeric material such that a replica of the relief structure in the mold is formed in the solidified polymeric material; and the transfer layer and the solidified polymeric material are subjected to an environment to selectively etch the transfer layer relative to the solidified polymeric material such that a relief image is formed in the transfer layer.
    Type: Application
    Filed: February 1, 2012
    Publication date: May 31, 2012
    Applicant: BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM
    Inventors: Carlton Grant Willson, Matthew E. Colburn
  • Publication number: 20110262860
    Abstract: Dual tone photoresist formulations comprising a photoacid generator are described and employed in fabrication techniques, including methods of making structures on substrates, and more particularly, methods of making electronic devices (e.g. transistors and the like) on flexible substrates wherein two patterns are formed simultaneously in one layer of photoresist.
    Type: Application
    Filed: April 20, 2011
    Publication date: October 27, 2011
    Inventors: C. Grant Willson, Wei-Lun Kane Jen, Brandon Mark Rawlings, Jeffrey Ryan Strahan
  • Patent number: 8033814
    Abstract: An imprint lithography template may be used to form an imprinted layer in a light curable liquid disposed on a substrate. During use, the template may be disposed within a template holder. The template holder may include a body with an opening configured to receive the template, a support plate, and an actuator system coupled to the body. The actuator system may be configured to alter a physical dimension of the template during use.
    Type: Grant
    Filed: March 2, 2010
    Date of Patent: October 11, 2011
    Assignee: Board of Regents, The University of Texas System
    Inventors: Todd C. Bailey, Byung-Jin Choi, Matthew E. Colburn, Sidlgata V. Sreenivasan, Carlton Grant Willson, John G. Ekerdt
  • Patent number: 8017174
    Abstract: A system and method for recognition of images may include the use of alignment markers. The image recognized may be a pattern from an array, a character, a number, a shape, and/or irregular shapes. The pattern may be formed by elements in an array such as an identification marking and/or a sensor array. More particularly, the system and method relate to discriminating between images by accounting for the orientation of the image. The size and/or location of alignment markers may provide information about the orientation of an image. Information about the orientation of an image may reduce false recognitions. The system and method of image recognition may be used with identification markings, biosensors, micro-fluidic arrays, and/or optical character recognition systems.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: September 13, 2011
    Assignee: Board of Regents The University of Texas System
    Inventors: Jason E. Meiring, Timothy B. Michaelson, C. Grant Willson
  • Patent number: 7906060
    Abstract: The present invention provides a composition and a method of using the same to form a pattern on a substrate using imprint lithography employing dark-field polymerization. To that end, the composition includes a bis vinyl ether component, and an initiator component that produces an acid in response to radiation. The bis vinyl ether component is reactive to the acid and polymerizes in response thereto.
    Type: Grant
    Filed: April 18, 2008
    Date of Patent: March 15, 2011
    Assignee: Board of Regents, The University of Texas System
    Inventors: Carlton Grant Willson, Nicholas A. Stacey