Patents by Inventor John Robert Logan

John Robert Logan 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).

  • Capacitive micromachined ultrasound transducer fabricated with epitaxial silicon membrane
    Patent number: 7545012
    Abstract: A capacitive micromachined ultrasound transducer (cMUT) cell is presented. The cMUT cell includes a lower electrode. Furthermore, the cMUT cell includes a diaphragm disposed adjacent to the lower electrode such that a gap having a first gap width is formed between the diaphragm and the lower electrode, wherein the diaphragm comprises one of a first epitaxial layer or a first polysilicon layer. In addition, a stress reducing material is disposed in the first epitaxial layer.
    Type: Grant
    Filed: March 30, 2006
    Date of Patent: June 9, 2009
    Assignee: General Electric Company
    Inventors: Lowell Scott Smith, David Martin Mills, Jeffrey Bernard Fortin, Wei-Cheng Tian, John Robert Logan
  • Capacitive micromachined ultrasound transducer fabricated with epitaxial silicon membrane
    Patent number: 7037746
    Abstract: A capacitive micromachined ultrasound transducer (cMUT) cell is presented. The cMUT cell includes a lower electrode. Furthermore, the cMUT cell includes a diaphragm disposed adjacent to the lower electrode such that a gap having a first gap width is formed between the diaphragm and the lower electrode, wherein the diaphragm comprises one of a first epitaxial layer or a first polysilicon layer. In addition, a stress reducing material is disposed in the first epitaxial layer.
    Type: Grant
    Filed: December 27, 2004
    Date of Patent: May 2, 2006
    Assignee: General Electric Company
    Inventors: Lowell Scott Smith, David Martin Mills, Jeffrey Bernard Fortin, Wei-Cheng Tian, John Robert Logan