Patents by Inventor Dajing CHEN

Dajing CHEN 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).

  • Porous piezoelectric material with dense surface, and associated methods and devices
    Patent number: 10147870
    Abstract: A method for producing a porous piezoelectric polymer film with a dense surface, includes depositing a polymer solution onto a substrate to form a polymer film including a solvent; evaporating a portion of the solvent to form the dense surface away from the substrate; forming water droplets in interior of the polymer film; and substantially evaporating the water droplets and remaining solvent to form porous interior. A piezoelectric composition includes a piezoelectric material with a porous interior and a dense surface for interfacing with an electrode. A piezoelectric device includes a first electrode; a porous piezoelectric film with a dense surface and porous interior, wherein the porous piezoelectric film is deposited on the first electrode and the dense surface is away from the first electrode; and a second electrode deposited on the dense surface for, together with the first electrode, providing an electrical interface for the porous piezoelectric film.
    Type: Grant
    Filed: November 12, 2015
    Date of Patent: December 4, 2018
    Assignee: THE TRUSTEES OF DARTMOUTH COLLEGE
    Inventors: John X. J. Zhang, Dajing Chen
  • POROUS PIEZOELECTRIC MATERIAL WITH DENSE SURFACE, AND ASSOCIATED METHODS AND DEVICES
    Publication number: 20170317269
    Abstract: A method for producing a porous piezoelectric polymer film with a dense surface, includes depositing a polymer solution onto a substrate to form a polymer film including a solvent; evaporating a portion of the solvent to form the dense surface away from the substrate; forming water droplets in interior of the polymer film; and substantially evaporating the water droplets and remaining solvent to form porous interior. A piezoelectric composition includes a piezoelectric material with a porous interior and a dense surface for interfacing with an electrode. A piezoelectric device includes a first electrode; a porous piezoelectric film with a dense surface and porous interior, wherein the porous piezoelectric film is deposited on the first electrode and the dense surface is away from the first electrode; and a second electrode deposited on the dense surface for, together with the first electrode, providing an electrical interface for the porous piezoelectric film.
    Type: Application
    Filed: November 12, 2015
    Publication date: November 2, 2017
    Inventors: John X.J. ZHANG, Dajing CHEN