Patents by Inventor Masaki Miyazato

Masaki Miyazato 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 method for improving wettability of a protective film of the magnetic recording medium
    Publication number: 20010031382
    Abstract: A carbon protective film of a magnetic recording medium includes a surface region having a high nitrogen concentration. The nitrogen-doped surface region enhances surface energy and improves wettability of the protective film with a liquid lubricant. The nitrogen is implanted by plasma treatment to produce a surface region in the protective film that includes from 6 to 20 at % of nitrogen in the surface region within 30 Å from the film surface. The treatment reduces the contact angle of the film surface with water to the range from of 10 to 30 degrees.
    Type: Application
    Filed: January 10, 2001
    Publication date: October 18, 2001
    Inventors: Kazuhiro Kusakawa, Michinari Kamiyama, Masaki Miyazato, Masanori Yoshihara, Hideki Matsuo, Hideaki Matsuyama
  • Magnetic recording medium having a carbon protective layer and method for manufacturing the same
    Patent number: 5837357
    Abstract: A magnetic recording medium is provided that includes a non-magnetic base, a magnetic layer laminated on a non-magnetic base, a carbon protective layer containing hydrogen and laminated on the magnetic layer, and a lubrication layer formed by applying a liquid lubricant to the carbon protective layer. The carbon protective layer includes a surface layer containing nitrogen, and the composition ratios of nitrogen and hydrogen in the surface layer may be suitably controlled to optimum ranges.
    Type: Grant
    Filed: November 6, 1996
    Date of Patent: November 17, 1998
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Souta Matsuo, Hiroshi Minazawa, Masaki Miyazato, Yoshiharu Kashiwakura