Patents by Inventor Hiroshi Daio

Hiroshi Daio 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 production process thereof
    Patent number: 6680112
    Abstract: A process for producing a magnetic recording medium, which comprises the steps of forming a non-magnetic undercoat film and a magnetic film on a non-magnetic substrate; forming a carbonaceous protective film thereon through plasma CVD to produce a disk D; etching the surface of a carbonaceous protective film in an etching apparatus 2 by use of plasma generated from an etching gas; and forming a lubricating film on the carbonaceous protective film surface.
    Type: Grant
    Filed: June 14, 2000
    Date of Patent: January 20, 2004
    Assignee: Showa Denko Kabushiki Kaisha
    Inventors: Mikio Suzuki, Kimie Takagi, Wenqiang Lu, Hiroshi Daio