Patents by Inventor Koutaro Tomita

Koutaro Tomita 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).

  • Process for production of magnetic thin film, magnetic thin film, and magnetic material
    Patent number: 9886978
    Abstract: The present invention provides a process for production of a magnetic thin film which has insulation properties, serves as a permanent magnet, and has improved residual magnetization in comparison with prior arts, the magnetic thin film, and a magnetic material. When a magnetic thin film 3 is formed, an external magnetic field with a predetermined intensity is applied to a coating liquid containing magnetic particles containing epsilon-type iron-oxide-based compounds which have insulation properties and which serve as a permanent magnet, and the coating liquid is let cured in order to form the magnetic thin film 3. Accordingly, the magnetic particles containing the epsilon-type iron-oxide-based compounds can be fixed while being oriented regularly in a magnetization direction. This realizes the process for production of the magnetic thin film 3 which has insulation properties and which serve as a permanent magnet, the magnetic thin film 3, and a magnetic material 1.
    Type: Grant
    Filed: June 24, 2010
    Date of Patent: February 6, 2018
    Assignees: The University of Tokyo, Dowa Electronics Materials Co., Ltd.
    Inventors: Shin-Ichi Ohkoshi, Asuka Namai, Kazuyuki Takami, Koutaro Tomita
  • PROCESS FOR PRODUCTION OF MAGNETIC THIN FILM, MAGNETIC THIN FILM, AND MAGNETIC MATERIAL
    Publication number: 20120100064
    Abstract: The present invention provides a process for production of a magnetic thin film which has insulation properties, serves as a permanent magnet, and has improved residual magnetization in comparison with prior arts, the magnetic thin film, and a magnetic material. When a magnetic thin film 3 is formed, an external magnetic field with a predetermined intensity is applied to a coating liquid containing magnetic particles containing epsilon-type iron-oxide-based compounds which have insulation properties and which serve as a permanent magnet, and the coating liquid is let cured in order to form the magnetic thin film 3. Accordingly, the magnetic particles containing the epsilon-type iron-oxide-based compounds can be fixed while being oriented regularly in a magnetization direction. This realizes the process for production of the magnetic thin film 3 which has insulation properties and which serve as a permanent magnet, the magnetic thin film 3, and a magnetic material 1.
    Type: Application
    Filed: June 24, 2010
    Publication date: April 26, 2012
    Applicant: The University of Tokyo
    Inventors: Shin-Ichi Ohkoshi, Asuka Namai, Kazuyuki Takami, Koutaro Tomita