Patents by Inventor Roland Stumpf

Roland Stumpf 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 nanomaterials and synthesis method
    Patent number: 7429339
    Abstract: A magnetic nanoparticle (22), a magnetic nanomaterial (30), assembly (30), and a method for synthsising a magnetic nanoparticle, relating to thermodynamically stable and air stable ferromagnetic nanoparticles of adjustable aspect ratio made upon decomposition of organometallic precursors in solution in the presence of a reaction gas and a mixture of organic ligands. The magnetic nanomaterial comprises magnetic nanoparticles of homogeneous size, shape, and magnetic orientation that comprises a magnetic core (24, 34) ferromagnetic at room temperature and/or operating temperatures, and a non-magnetic matrix (26, 36) encapsulating the magnetic core. This magnetic nanomaterial could be used in high frequency integrated circuit applications, such as used in wireless portable electronic devices, to enchance magnetic field confinement and improve passive component performance at MHz and GHz frequency in a variety of passive and active devices, such as transformers, on-chip signal isolation, inductors, and the like.
    Type: Grant
    Filed: February 6, 2003
    Date of Patent: September 30, 2008
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Philippe Renaud, Frederic Dumestre, Bruno Chaudret, Marie Claire Fromen, Marie-Jose Casanove, Peter Zurcher, Roland Stumpf, Catherine Amiens
  • Magnetic nanomaterials and synthesis method
    Publication number: 20050200438
    Abstract: A magnetic nanoparticle (22), a magnetic nanomaterial (30), assembly (30), and a method for synthsising a magnetic nanoparticle, relating to thermodynamically stable and air stable ferromagnetic nanoparticles of adjustable aspect ratio made upon decomposition of organometallic precursors in solution in the presence of a reaction gas and a mixture of organic ligands. The magnetic nanomaterial comprises magnetic nanoparticles of homogeneous size, shape, and magnetic orientation that comprises a magnetic core (24, 34) ferromagnetic at room temerature and/or operating temperatures, and a non-magnetic matrix (26, 36) encapsulating the magnetic core. This magenetic nanomaterial could be used in high frequency integrated circuit applications, such as used in wireless portable electronic devices, to enchance magnetic field confienment and improve passive component performance at MHz and GHz frequency in a variety of passive and active devices, such as transformers, on-chip signal isolation, inductors, and the like.
    Type: Application
    Filed: February 6, 2003
    Publication date: September 15, 2005
    Inventors: Philippe Renaud, Frederic Dumestre, Bruno Chaudret, Marie Fromen, Marie-Jose Casanove, Peter Zurcher, Roland Stumpf, Catherine Amiens