Patents by Inventor Hiren V. Shah

Hiren V. Shah 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: 7512303
    Abstract: The invention relates to a wafer scale process for the manufacture of optical waveguide devices, and particularly for the manufacture of ridge waveguide devices, and the improved waveguides made thereby. The present invention has found a process for achieving sub-micron control of an optical waveguiding layer thickness by providing a dimensionally stable wafer assembly into which adhesive can be introduced without altering the planar relationship between a carrier wafer and an optically transmissive wafer in wafer scale manufacture. This process permits wafer scale manufacture of optical waveguide devices including thin optically transmissive layers. A pattern of spacer pedestals is created by a deposition and etch back, or by a surface etch process to precisely reference surface information from a master surface to a carrier wafer to a thin optically transmissive wafer. The tolerance achievable in accordance with this process provides consistent yield across the wafer.
    Type: Grant
    Filed: June 27, 2007
    Date of Patent: March 31, 2009
    Assignee: JDS Uniphase Corporation
    Inventors: Benjamin F. Catching, Donald M. Friedrich, Charles A. Hulse, Marc K. Von Gunten, Jason Reed, Karl Kissa, Glen Drake, Julia Duncan, William J. Minford, Hiren V. Shah, Jerry Zieba, Jason Jiazhan Xu
  • Patent number: 6933019
    Abstract: A method of applying a polymer coating uses a nebulized aerosol of solubilized polymer solution having high-viscosity droplets and low-viscosity droplets to form a textured antireflective surface. Air or other gas is used to direct the nebulized aerosol toward the surface of an object. In some embodiments, heated or dried air, such as from an air curtain, is used to promote the formation of high-viscosity droplets. In a particular embodiment, multiple ultrasonic nebulizers are used in combination with synchronized air jets to apply a uniform polymer coating onto a glass panel used in a large-format display system. Dye is optionally added to the solubilized polymer solution to provide a notch filter at 585 nm and/or infrared filter.
    Type: Grant
    Filed: November 6, 2003
    Date of Patent: August 23, 2005
    Assignee: JDS Uniphase Corporation
    Inventors: Thomas Mayer, Hiren V. Shah, Brad A. Duffy, Richard K. Zoborowski
  • Patent number: 6696534
    Abstract: Fluoropolymers consisting of alternating perfluorocyclobutane and aryl ether linkages possess suitable properties for optical waveguides and other devices using refractive properties of the polymers. Perfluorocyclobutane (PFCB) polymers having aryl groups alternating on an ether chain have shown useful physical properties for optical waveguide applications. Processes for micromolding such polymeric films by replicating a pattern or image directly from a silicon master, rather than from a polydimethyl siloxane (PDMS) mold, are disclosed.
    Type: Grant
    Filed: August 7, 2002
    Date of Patent: February 24, 2004
    Assignee: Clemson University
    Inventors: Dennis W. Smith, Hiren V. Shah, John Ballato, Stephen Foulger
  • Patent number: 6689855
    Abstract: Fluoropolymers consisting of alternating perfluorocyclobutane and aryl ether linkages possess suitable properties for optical waveguides and other devices using refractive properties of the polymers. Perfluorocyclobutane (PFCB) polymers having aryl groups alternating on an ether chain have shown useful physical properties for optical waveguide applications. Processes for micromolding such polymeric films by replicating a pattern or image directly from a silicon master, rather than from a polydimethyl siloxane (PDMS) mold) are disclosed.
    Type: Grant
    Filed: July 16, 2002
    Date of Patent: February 10, 2004
    Assignee: Clemson University
    Inventors: Dennis W. Smith, Hiren V. Shah, John Ballato, Stephen Foulger
  • Patent number: 6649715
    Abstract: Fluoropolymers consisting of alternating perfluorocyclobutane and aryl ether linkages possess suitable properties for optical waveguides and other devices using refractive properties of the polymers. Perfluorocyclobutane (PFCB) polymers having aryl groups alternating on an ether chain have shown useful physical properties for optical waveguide applications. Processes for micromolding such polymeric films by replicating a pattern or image directly from a silicon master, rather than from a polydimethyl siloxane (PDMS) mold, are disclosed.
    Type: Grant
    Filed: June 27, 2000
    Date of Patent: November 18, 2003
    Assignee: Clemson University
    Inventors: Dennis W. Smith, Hiren V. Shah, John Ballato, Stephen Foulger
  • Publication number: 20030050416
    Abstract: Fluoropolymers consisting of alternating perfluorocyclobutane and aryl ether linkages possess suitable properties for optical waveguides and other devices using refractive properties of the polymers. Perfluorocyclobutane (PFCB) polymers having aryl groups alternating on an ether chain have shown useful physical properties for optical waveguide applications. Processes for micromolding such polymeric films by replicating a pattern or image directly from a silicon master, rather than from a polydimethyl siloxane (PDMS) mold) are disclosed.
    Type: Application
    Filed: July 16, 2002
    Publication date: March 13, 2003
    Applicant: Clemson University
    Inventors: Dennis W. Smith, Hiren V. Shah, John Ballato, Stephen Foulger
  • Publication number: 20030023014
    Abstract: Fluoropolymers consisting of alternating perfluorocyclobutane and aryl ether linkages possess suitable properties for optical waveguides and other devices using refractive properties of the polymers. Perfluorocyclobutane (PFCB) polymers having aryl groups alternating on an ether chain have shown useful physical properties for optical waveguide applications. Processes for micromolding such polymeric films by replicating a pattern or image directly from a silicon master, rather than from a polydimethyl siloxane (PDMS) mold, are disclosed.
    Type: Application
    Filed: August 7, 2002
    Publication date: January 30, 2003
    Inventors: Dennis W. Smith, Hiren V. Shah, John Ballato, Stephen Foulger