Patents by Inventor April Jeffries

April Jeffries 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).

  • Systems and methods for controlling the morphology and porosity of printed reactive inks for high precision printing
    Patent number: 11077664
    Abstract: Systems and methods for optimizing morphology and electrical properties of silver printed on a substrate with a particular implementation in photovoltaic manufacturing techniques. The system comprises a substrate, a printer jet head having a nozzle to dispense a reactive metal ink and a solvent onto the substrate, and wherein the solvent and a temperature of the substrate are controlled during deposition of the reactive metal ink onto the substrate to produce a dense film in the absence of sintering.
    Type: Grant
    Filed: May 17, 2018
    Date of Patent: August 3, 2021
    Assignee: ARIZONA BOARD OF REGENTS ON BEHALF OF ARIZONA STATE UNIVERSITY
    Inventors: Mariana Bertoni, April Jeffries, Owen Hildreth, Avinash Mamidanna
  • SYSTEMS AND METHODS FOR CONTROLLING THE MORPHOLOGY AND POROSITY OF PRINTED REACTIVE INKS FOR HIGH PRECISION PRINTING
    Publication number: 20200147966
    Abstract: Systems and methods for optimizing morphology and electrical properties of silver printed on a substrate with a particular implementation in photovoltaic manufacturing techniques. The system comprises a substrate, a printer jet head having a nozzle to dispense a reactive metal ink and a solvent onto the substrate, and wherein the solvent and a temperature of the substrate are controlled during deposition of the reactive metal ink onto the substrate to produce a dense film in the absence of sintering.
    Type: Application
    Filed: May 17, 2018
    Publication date: May 14, 2020
    Inventors: Mariana BERTONI, April JEFFRIES, Owen HILDRETH, Avinash MAMIDANNA
  • Printing using reactive inks and conductive adhesion promoters
    Patent number: 10286713
    Abstract: Methods and chemistries are described to form electrically conductive adhesion promoters for use with reactive inks. In some implementations, a metal ink is printed on a substrate. An adhesion promoter is deposited on the surface of the substrate. The adhesion promoter reacts to form a covalent bond with the substrate. Subsequently, a reactive metal ink is used to print on a substrate using a drop-on-demand printing process. The reactive metal ink includes metal cations that react with the adhesion promoter-treated substrate surface to form a conductive bond between the adhesion promoter-treated substrate surface and a metal of the reactive metal ink.
    Type: Grant
    Filed: October 11, 2017
    Date of Patent: May 14, 2019
    Assignee: Arizona Board of Regents on behalf of Arizona State University
    Inventors: Owen Hildreth, April Jeffries, Avinash Mamidanna, Mariana Bertoni
  • PRINTING USING REACTIVE INKS AND CONDUCTIVE ADHESION PROMOTERS
    Publication number: 20180099520
    Abstract: Methods and chemistries are described to form electrically conductive adhesion promoters for use with reactive inks. In some implementations, a metal ink is printed on a substrate. An adhesion promoter is deposited on the surface of the substrate. The adhesion promoter reacts to form a covalent bond with the substrate. Subsequently, a reactive metal ink is used to print on a substrate using a drop-on-demand printing process. The reactive metal ink includes metal cations that react with the adhesion promoter-treated substrate surface to form a conductive bond between the adhesion promoter-treated substrate surface and a metal of the reactive metal ink.
    Type: Application
    Filed: October 11, 2017
    Publication date: April 12, 2018
    Inventors: Owen Hildreth, April Jeffries, Avinash Mamidanna, Mariana Bertoni