Patents by Inventor Ryoichi Kadota

Ryoichi Kadota 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 recording medium and manufacturing method thereof
    Publication number: 20060115686
    Abstract: A high-density magnetic recording medium uses a nonmetallic substrate, while still providing high in-plane magnetic anisotropy and remanent coercivity. Such a medium can be formed by depositing a seed layer on a textured surface of the nonmetallic substrate in a gas mixture containing oxygen or nitrogen and an inert gas, while controlling the oxygen concentration or nitrogen concentration, and subsequently exposing the surface of the seed layer to oxygen or nitrogen.
    Type: Application
    Filed: January 17, 2006
    Publication date: June 1, 2006
    Applicant: Fuji Electric Co., Ltd.
    Inventors: Toyoji Ataka, Satoru Nakamura, Katsuya Masuda, Ryoichi Kadota, Yuji Ando
  • Magnetic recording medium and manufacturing method thereof
    Patent number: 7014882
    Abstract: A high-density magnetic recording medium uses a nonmetallic substrate, while still providing high in-plane magnetic anisotropy and remanent coercivity. Such a medium can be formed by depositing a seed layer on a textured surface of the nonmetallic substrate in a gas mixture containing oxygen or nitrogen and an inert gas, while controlling the oxygen concentration or nitrogen concentration, and subsequently exposing the surface of the seed layer to oxygen or nitrogen.
    Type: Grant
    Filed: March 13, 2003
    Date of Patent: March 21, 2006
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Toyoji Ataka, Satoru Nakamura, Katsuya Masuda, Ryoichi Kadota, Yuji Ando
  • Magnetic recording medium and manufacturing method thereof
    Publication number: 20040009372
    Abstract: A high-density magnetic recording medium uses a nonmetallic substrate, while still providing high in-plane magnetic anisotropy and remanent coercivity. Such a medium can be formed by depositing a seed layer on a textured surface of the nonmetallic substrate in a gas mixture containing oxygen or nitrogen and an inert gas, while controlling the oxygen concentration or nitrogen concentration, and subsequently exposing the surface of the seed layer to oxygen or nitrogen.
    Type: Application
    Filed: March 13, 2003
    Publication date: January 15, 2004
    Inventors: Toyoji Ataka, Satoru Nakamura, Katsuya Masuda, Ryoichi Kadota, Yuji Ando