Patents by Inventor RUICHAO XU

RUICHAO XU 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).

  • Method of fabricating an acoustic transducer
    Patent number: 10553779
    Abstract: A method of fabricating an acoustic transducer comprising: fabricating a substrate; depositing a bottom electrode on the substrate; depositing an active layer on the bottom electrode; depositing a top electrode on the active layer; wherein at least one electrode is patterned to form at least two active elements; and, wherein a ratio of a thickness coupling coefficient kt to an effective lateral coupling coefficient k31,eff of the active layer is 1.3 or greater.
    Type: Grant
    Filed: December 23, 2014
    Date of Patent: February 4, 2020
    Assignee: MEGGITT A/S
    Inventors: Tomasz Zawada, Ruichao Xu, Michele Guizzetti, Louise Møller Borregaard, Erling Ringgaard
  • Piezoelectric energy harvesting
    Patent number: 10361356
    Abstract: An energy harvesting unit comprising: a package formed by a base and a lid, the package including a sealed interior volume and an exterior; a ledge formed in the sealed interior volume with a first cavity above and a second cavity below the ledge; a plurality of inner electrical contacts formed on the ledge; a plurality of outer electrical contacts formed on the exterior of the package wherein the outer electrical contacts are electrically connected to the inner electrical contacts through the package; and, a piezo-electric member in electrical communication with the inner electrical contacts and coupled to the ledge on a first side of the package and spanning across the cavity and coupled to the ledge on an opposite side of the package.
    Type: Grant
    Filed: September 15, 2014
    Date of Patent: July 23, 2019
    Assignee: MEGGITT A/S
    Inventors: Tomasz Zawada, Ruichao Xu, Michele Guizzetti, Louise Møller Borregaard, Erling Ringgaard
  • INTEGRATED MULTI-ELEMENT ACOUSTIC TRANSDUCERS AND METHODS OF MAKING THE SAME
    Publication number: 20180226566
    Abstract: A method of fabricating an acoustic transducer comprising: fabricating a substrate; depositing a bottom electrode on the substrate; depositing an active layer on the bottom electrode; depositing a top electrode on the active layer; wherein at least one electrode is patterned to form at least two active elements; and, wherein a ratio of a thickness coupling coefficient kt to an effective lateral coupling coefficient k31,eff of the active layer is 1.3 or greater.
    Type: Application
    Filed: December 23, 2014
    Publication date: August 9, 2018
    Inventors: TOMASZ ZAWADA, RUICHAO XU, MICHELE GUIZZETTI, LOUISE MØLLER BORREGAARD, ERLING RINGGAARD
  • PIEZOELECTRIC ENERGY HARVESTING
    Publication number: 20160233413
    Abstract: An energy harvesting unit comprising: a package formed by a base and a lid, the package including a sealed interior volume and an exterior; a ledge formed in the sealed interior volume with a first cavity above and a second cavity below the ledge; a plurality of inner electrical contacts formed on the ledge; a plurality of outer electrical contacts formed on the exterior of the package wherein the outer electrical contacts are electrically connected to the inner electrical contacts through the package; and, a piezo-electric member in electrical communication with the inner electrical contacts and coupled to the ledge on a first side of the package and spanning across the cavity and coupled to the ledge on an opposite side of the package.
    Type: Application
    Filed: September 15, 2014
    Publication date: August 11, 2016
    Inventors: TOMASZ ZAWADA, RUICHAO XU, MIHELE GUIZZETT, LOUISE MØLLER BORREGAARD, ERLING RINGGAARD