Patents by Inventor Jacques Ferre

Jacques Ferre 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 etching process, especially for magnetic or magnetooptic recording
    Patent number: 7132222
    Abstract: Process for writing on a material, in which said material is irradiated by means of a beam of light ions, such as for example He+ ions, said beam of light ions having an energy of the order of or less than a hundred keV, wherein this material comprises a plurality of superposed thin-layers, at least one of said thin layers being magnetic and in that one or more regions having sizes of the order of 1 micrometer or less are irradiated, the irradiation dose being controlled so as to be a few 1016 ions/cm2 or less, the irradiation modifying the composition of atomic planes in the material at one or more interfaces between two layers of the latter.
    Type: Grant
    Filed: April 14, 2004
    Date of Patent: November 7, 2006
    Assignee: Centre National de la Recherche Scientifique (CNRS)
    Inventors: Claude Chappert, Harry Bernas, Jacques Ferre
  • Magnetic etching process, especially for magnetic or magnetooptic recording
    Publication number: 20040259036
    Abstract: Process for writing on a material, in which said material is irradiated by means of a beam of light ions, such as for example He+ ions, said beam of light ions having an energy of the order of or less than a hundred keV, wherein this material comprises a plurality of superposed thin-layers, at least one of said thin layers being magnetic and in that one or more regions having sizes of the order of 1 micrometer or less are irradiated, the irradiation dose being controlled so as to be a few 1016 ions/cm2 or less, the irradiation modifying the composition of atomic planes in the material at one or more interfaces between two layers of the latter.
    Type: Application
    Filed: April 14, 2004
    Publication date: December 23, 2004
    Inventors: Claude Chappert, Harry Bernas, Jacques Ferre