Patents by Inventor C. Grant Willson

C. 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: 6696220
    Abstract: Described are imprint lithography templates, methods of forming and using the templates, and a template holder device. An imprint lithography template may include a body with a plurality of recesses on a surface of the body. The body may be of a material that is substantially transparent to activating light. At least a portion of the plurality of recesses may define features having a feature size less than about 250 nm. A template may be formed by obtaining a material that is substantially transparent to activating light and forming a plurality or recesses on a surface of the template. In some embodiments, a template may further include at least one alignment mark. In some embodiments, a template may further include a gap sensing area. 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.
    Type: Grant
    Filed: October 12, 2001
    Date of Patent: February 24, 2004
    Assignee: Board of Regents, The University of Texas System
    Inventors: Todd Bailey, Byung J. Choi, Matthew Colburn, S. V. Sreenivasan, C. Grant Willson, John Ekerdt
  • Publication number: 20030003436
    Abstract: A system and method for the detection of analytes in a fluid, in one embodiment, includes a light source, a sensor array, sensing elements, and a detector. More particularly, the system and method relate to discriminating mixtures of analytes in a fluid. The sensor array is formed from a supporting member into which a plurality of sensing elements may be formed. The sensing element may have a predefined shape. The sensing element may be configured to produce a signal when the sensing element interacts with the analyte. In one embodiment, the identity of the analyte may be determined by the detection of the signal and the shape of the sensing element. Using pattern recognition techniques, the analytes within a multi-analyte fluid may be characterized.
    Type: Application
    Filed: February 5, 2002
    Publication date: January 2, 2003
    Inventors: C. Grant Willson, Michael Pishko, David M. Johnson, Ben Rathsack, Zachary Hogan
  • Publication number: 20020115002
    Abstract: Described are imprint lithography templates, methods of forming and using the templates, and a template holder device. An imprint lithography template may include a body with a plurality of recesses on a surface of the body. The body may be of a material that is substantially transparent to activating light. At least a portion of the plurality of recesses may define features having a feature size less than about 250 nm. A template may be formed by obtaining a material that is substantially transparent to activating light and forming a plurality or recesses on a surface of the template. In some embodiments, a template may further include at least one alignment mark. In some embodiments, a template may further include a gap sensing area. 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.
    Type: Application
    Filed: October 12, 2001
    Publication date: August 22, 2002
    Inventors: Todd Bailey, Byung J. Choi, Matthew Colburn, S.V. Sreenivasan, C. Grant Willson, John Ekerdt
  • Publication number: 20020093122
    Abstract: Described are high precision gap and orientation measurement methods between a template and a substrate used in imprint lithography processes. Gap and orientation measurement methods presented here include uses of broad-band light based measuring techniques.
    Type: Application
    Filed: August 1, 2001
    Publication date: July 18, 2002
    Inventors: Byung J. Choi, Matthew Colburn, S. V. Sreenivasan, C. Grant Willson, Todd Bailey, John Ekerdt
  • Publication number: 20020094496
    Abstract: Disclosed herein is an automatic fluid dispensing method and system for dispensing fluid on the surface of a plate-like material, or substrate, including a semiconductor wafer for imprint lithography processes. The dispensing method uses fluid dispenser and a substrate stage that may generate relative lateral motions between a fluid dispenser tip a substrate. Also described herein are methods and devices for creating a planar surface on a substrate using a substantially unpatterned planar template.
    Type: Application
    Filed: February 12, 2002
    Publication date: July 18, 2002
    Inventors: Byung J. Choi, S. V. Sreenivasan, C. Grant Willson, Matthew Colburn, Todd Bailey, John Ekerdt
  • Patent number: 6399273
    Abstract: Water-processable positive-tone photoresists comprising a water-soluble polymer, wherein the polymer contains a heat-labile functional group that renders the polymer insoluble in water or an aqueous base upon heat treatment, and an acid-labile functional group that restores said water or aqueous base solubility to the polymer upon irradiation in the presence of a water-processable photoacid generator, are described. Also described are the methods of making such polymers and photoresists.
    Type: Grant
    Filed: August 14, 2000
    Date of Patent: June 4, 2002
    Assignee: Board of Regents, University of Texas System
    Inventors: Shintaro Yamada, Timo Rager, C. Grant Willson
  • Patent number: 6103445
    Abstract: Provided herein are photoresist compositions for use particularly in 193 nm lithography. These compositions generally comprise a polymer of norbornene and a photo acid generator. The disclosed compositions provide transparency at wavelengths of approximately 190-200 nm, combined with high etch resistance. The polymers also provide hydrophilicity for good positive-tone development characteristics and high glass transition temperatures. Also disclosed is a process for microfabrication utilizing the claimed compositions. A further aspect of the invention is a plasticizer comprising 4,8-di-t-butyl-tricyclo(5.2.1.0.sup.2,6)decanedicarboxylate.
    Type: Grant
    Filed: March 7, 1997
    Date of Patent: August 15, 2000
    Assignee: Board of Regents, The University of Texas System
    Inventors: C. Grant Willson, Uzodinma Okoroanyanwu, David Medieros