Patents by Inventor Eikiyu Hiruma

Eikiyu Hiruma 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).

  • Method of fabricating an image pick-up tube and target section used therewith
    Patent number: 5021705
    Abstract: An image pick-up tube and a method of fabricating an image pick-up tube and a target section used therewith, in which the target includes at least a conductive film and a photoconductive film on a substrate for photo-electric conversion, and a signal from the target section is read by an electron beam scanning system. At least a part of the surface area outside the effective scanning region of the electron beam scanning side of the target section is formed of a secondary electron emission dampening layer.
    Type: Grant
    Filed: May 24, 1989
    Date of Patent: June 4, 1991
    Assignees: Hitachi Ltd., Nippon Hoso Kyokai
    Inventors: Masanao Yamamoto, Takaaki Unnai, Shigeru Ehata, Tadaaki Hirai, Kenji Sameshima, Eikiyu Hiruma, Shirou Suzuki, Kenkichi Tanioka, Junichi Yamazaki, Keiichi Shidara
  • Method of making a photosensor
    Patent number: 4883562
    Abstract: A method of making an image pickup tube target (FIG. 1A), etc., using an amorphous photoconductive layer. When an electrode, an amorphous semiconductor layer, etc., are provided on a substrate, the steps of ion etching away a surface of the substrate and forming the electrode are performed so that a target (FIG. 1A) is produced in which no defects are substantially caused in a reproduced image even if a high electric field is applied across the target.
    Type: Grant
    Filed: January 26, 1989
    Date of Patent: November 28, 1989
    Assignees: Hitachi, Ltd., Nippon Hoso Kyokai
    Inventors: Hirofumi Ogawa, Kenji Sameshima, Tadaaki Hirai, Takaaki Unnai, Masanao Yamamoto, Keiichi Shidara, Junichi Yamazaki, Eikiyu Hiruma, Shirou Suzuki