Patents by Inventor Hajima Utsunomiya

Hajima Utsunomiya 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).

  • Publication number: 20050018592
    Abstract: An optical information recording medium which makes it possible to reduce the noise level and improve the C/N ratio and store record data for a long time period. An optical information recording medium has a recording layer formed on a substrate, for having a laser beam irradiated thereto for recording and reproduction of record data. The recording layer includes a first sub-recording film and a second sub-recording film. The first sub-recording film is formed of a first material containing Si as a main component. The second sub-recording film is formed of a second material containing Al as a main component and having Mg added thereto, and disposed in the vicinity of the first recording film. The laser beam is irradiated to the recording layer via a light transmitting layer formed in a manner covering the recording layer.
    Type: Application
    Filed: July 22, 2004
    Publication date: January 27, 2005
    Applicant: TDK Corporation
    Inventors: Hiroyasu Inoue, Koji Mishima, Masaki Aoshima, Hideki Hirata, Hajima Utsunomiya