Patents by Inventor Stephen John Wrazien

Stephen John Wrazien 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).

  • Reconfigurable electric circuitry and method of making same
    Patent number: 8227701
    Abstract: A reconfigurable electric circuit includes first and second crystalline material layers positioned adjacent to each other and forming a first interface, and a first ferroelectric layer positioned adjacent to the first crystalline material layer and having ferroelectric domains applying an electric field to regions of the first interface to induce a quasi two-dimensional electron gas in the regions, wherein at least one of the regions forms a gate and at least one of the regions forms a channel.
    Type: Grant
    Filed: January 26, 2009
    Date of Patent: July 24, 2012
    Assignee: Seagate Technology LLC
    Inventors: Stephen John Wrazien, Florin Zavaliche, Joachim Walter Ahner, Tong Zhao, Martin Gerard Forrester, Shan Hu
  • Non-destructive read back for ferroelectric data storage device
    Patent number: 7916513
    Abstract: A data storage device comprising a ferroelectric layer, a perovskite structure, and at least one sensor, where the perovskite structure has a polarity discontinuity configured to generate capacitance voltages in the perovskite structure based on polarization charges of the ferroelectric material, and where the at least one sensor is configured to read the capacitance voltages from the perovskite structure.
    Type: Grant
    Filed: November 5, 2008
    Date of Patent: March 29, 2011
    Assignee: Seagate Technology LLC
    Inventors: Shan Hu, Tong Zhao, Florin Zavaliche, Joachim Ahner, Stephen John Wrazien, Martin Gerard Forrester
  • Generating PES using readback signal distortion
    Patent number: 7885025
    Abstract: A data storage system includes a storage medium having a plurality of data sectors and a head that communicates with the data storage medium. The head produces a readback signal when reading information from the data storage medium. A computation unit extracts a distortion component of the readback signal and generates a position error signal from the distortion component.
    Type: Grant
    Filed: October 22, 2008
    Date of Patent: February 8, 2011
    Assignee: Seagate Technology LLC
    Inventors: Walter Richard Eppler, Inci Ozgunes, Xiangjun Feng, Kevin Arthur Gomez, Mark David Bedillion, Stephen John Wrazien
  • Reconfigurable Electric Circuitry and Method of Making Same
    Publication number: 20100187583
    Abstract: A reconfigurable electric circuit includes first and second crystalline material layers positioned adjacent to each other and forming a first interface, and a first ferroelectric layer positioned adjacent to the first crystalline material layer and having ferroelectric domains applying an electric field to regions of the first interface to induce a quasi two-dimensional electron gas in the regions, wherein at least one of the regions forms a gate and at least one of the regions forms a channel.
    Type: Application
    Filed: January 26, 2009
    Publication date: July 29, 2010
    Applicant: Seagate Technology LLC
    Inventors: Stephen John Wrazien, Florin Zavaliche, Joachim Walter Ahner, Tong Zhao, Martin Gerard Forrester, Shan Hu
  • NON-DESTRUCTIVE READ BACK FOR FERROELECTRIC DATA STORAGE DEVICE
    Publication number: 20100110754
    Abstract: A data storage device comprising a ferroelectric layer, a perovskite structure, and at least one sensor, where the perovskite structure has a polarity discontinuity configured to generate capacitance voltages in the perovskite structure based on polarization charges of the ferroelectric material, and where the at least one sensor is configured to read the capacitance voltages from the perovskite structure.
    Type: Application
    Filed: November 5, 2008
    Publication date: May 6, 2010
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Shan Hu, Tong Zhao, Florin Zavaliche, Joachim Ahner, Stephen John Wrazien, Martin Gerard Forrester
  • GENERATING PES USING READBACK SIGNAL DISTORTION
    Publication number: 20100097714
    Abstract: A data storage system includes a storage medium having a plurality of data sectors and a head that communicates with the data storage medium. The head produces a readback signal when reading information from the data storage medium. A computation unit extracts a distortion component of the readback signal and generates a position error signal from the distortion component.
    Type: Application
    Filed: October 22, 2008
    Publication date: April 22, 2010
    Applicant: Seagate Technology LLC
    Inventors: Walter Richard Eppler, Inci Ozgunes, Xiangjun Feng, Kevin Arthur Gomez, Mark David Bedillion, Stephen John Wrazien