Patents by Inventor Thibault Devolder

Thibault Devolder 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).

  • Magnetic memory device
    Patent number: 7738286
    Abstract: A magnetic memory device comprises a magnetic tunnel junction (MTJ) connecting to a bit line to a sense line through an isolation transistor. The MTJ includes a ferromagnetic layer having a magnetic hard axis. An assist current line overlies the bit line and is insulated from the bit line. The MTJ is switchable between a first, relatively high resistance state and a second, relatively low resistance state. The assist current line applies a magnetic field along the magnetic hard axis in the ferromagnetic layer, independently of current flow through the MTJ for assisting switching of the MTJ between the first and second states.
    Type: Grant
    Filed: December 14, 2006
    Date of Patent: June 15, 2010
    Assignees: Hitachi, Ltd., Centre National de la Recherche Scientifique, Universite Paris Sud XI
    Inventors: Kenchi Ito, Hiromasa Takahashi, Takayuki Kawahara, Riichiro Takemura, Thibault Devolder, Paul Crozat, Joo-von Kim, Claude Chappert
  • Magnetic memory device
    Publication number: 20080037179
    Abstract: A magnetic memory device comprises a magnetic tunnel junction (MTJ) connecting to a bit line to a sense line through an isolation transistor. The MTJ includes a ferromagnetic layer having a magnetic hard axis. An assist current line overlies the bit line and is insulated from the bit line. The MTJ is switchable between a first, relatively high resistance state and a second, relatively low resistance state. The assist current line applies a magnetic field along the magnetic hard axis in the ferromagnetic layer, independently of current flow through the MTJ for assisting switching of the MTJ between the first and second states.
    Type: Application
    Filed: December 14, 2006
    Publication date: February 14, 2008
    Inventors: Kenchi Ito, Hiromasa Takahashi, Takayuki Kawahara, Riichiro Takemura, Thibault Devolder, Paul Crozat, Joo-von Kim, Claude Chappert