Patents by Inventor Andreas Roelofs

Andreas Roelofs 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).

  • Publication number: 20100034008
    Abstract: Memory units that have a magnetic tunnel junction cell that utilizes spin torque and a current induced magnetic field to assist in the switching of the magnetization orientation of the free layer of the magnetic tunnel junction cell. The memory unit includes a spin torque current source for passing a current through the magnetic tunnel junction cell, the spin torque current source having a direction perpendicular to the magnetization orientations, and also includes a magnetic ampere field current source is oriented in a direction orthogonal or at some angles to the magnetization orientations.
    Type: Application
    Filed: August 27, 2008
    Publication date: February 11, 2010
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Xiaobin Wang, Haiwen Xi, Hongyue Liu, Insik Jin, Andreas Roelofs, Eileen Yan, Dimitar V. Dimitrov
  • Publication number: 20090316462
    Abstract: Magnetic shift registers in which data writing and reading is accomplished by moving the magnetic domain walls by electric current. Various embodiments of domain wall nodes or anchors that stabilize a domain wall are provided. In some embodiments, the wall anchors are elements separate from the magnetic track. In other embodiments, the wall anchors are disturbances in the physical configuration of the magnetic track. In still other embodiments, the wall anchors are disturbances in the material of the magnetic track.
    Type: Application
    Filed: June 24, 2008
    Publication date: December 24, 2009
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Haiwen Xi, Xiaobin Wang, Dimitar V. Dimitrov, Paul E. Anderson, Harry Liu, Song S. Xue, Andreas Roelofs, Markus Siegert
  • Publication number: 20090160097
    Abstract: A single annealing process simultaneously creates local areas of ferroelectric imprint that can be used as markers, and areas with low leakage current that exhibit ideal symmetric switching on ferroelectric recording media.
    Type: Application
    Filed: December 20, 2007
    Publication date: June 25, 2009
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Tong Zhao, Andreas Roelofs, Cedric Stephane Bedoya
  • Publication number: 20070041233
    Abstract: A method for improving the stability of ferroelectric storage devices comprises: providing a ferroelectric storage medium including a film of ferroelectric material; and repeatedly applying a voltage to the film of ferroelectric material to improve the stability of polarized bits in the film of ferroelectric material. An apparatus that is used to perform the method is also provided.
    Type: Application
    Filed: August 19, 2005
    Publication date: February 22, 2007
    Applicant: Seagate Technology LLC
    Inventors: Andreas Roelofs, Martin Forrester, Joachim Ahner
  • Publication number: 20060023606
    Abstract: An apparatus comprises a ferroelectric storage medium, and a transducer for reading data from the ferroelectric storage medium and for writing data to the ferroelectric storage medium, wherein the transducer includes a substrate and a probe coupled to the substrate, wherein the probe includes a conductive element and a bilayer structure causing the probe to bend toward the ferroelectric storage medium.
    Type: Application
    Filed: July 30, 2004
    Publication date: February 2, 2006
    Applicant: Seagate Technology LLC
    Inventors: Mark Lutwyche, Earl Johns, Martin Forrester, Mark Bedillion, Andreas Roelofs, Joachim Ahner, Robert Rottmayer, Andre Liem, Edward Skalko, Xueshi Yang