Patents by Inventor Katsuo Kuwano

Katsuo Kuwano 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).

  • Optical transparent film and sputtering target for forming optical transparent film
    Patent number: 6528442
    Abstract: To provide an optically transparent film containing 0.01 to 20% by weight glass forming oxide consisting of Nb2O5, V2O5, B2O3, SiO2, and P2O6; 0.01 to 20% by weight Al2O3 or Ga2O3; and 0.01 to 5% by weight hard oxide of ZrO2 and TiO2 as required; balance being ZnO, and a sputtering target for forming such a film. This sputtering target reduces occurrence of particles during sputtering, decreases the number of interruption or discontinuance of sputtering to improve production efficiency, and forms a protective film for optical disks with large transmittance and low reflectance.
    Type: Grant
    Filed: December 7, 2000
    Date of Patent: March 4, 2003
    Assignee: Nikko Materials Company, Limited
    Inventors: Katsuo Kuwano, Hideo Takami