Patents by Inventor Kenkichi Tanioka

Kenkichi Tanioka 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).

  • Photoconductive target
    Patent number: 4330733
    Abstract: A photoconductive target having an electrode and a P-type conductive layer mainly made of Se and making rectifying contact at an interface with the electrode, with at least Te being doped in a portion of the P-type conductive layer. At least one metal fluoride forming shallow levels is doped in the region where the signal current is generated for the most part of the P-type conductive layer with an average concentration of not less than 50 ppm and not more than 5% by weight. The metal fluoride is preferably at least one selected from the group consisting of LiF, NaF, MgF.sub.2, CaF.sub.2, BaF.sub.2, AlF.sub.3, CrF.sub.3, MnF.sub.2, CoF.sub.2, PbF.sub.2, CeF.sub.3 and TlF. The high light sticking of the photoconductive target can thus be considerably reduced.
    Type: Grant
    Filed: May 22, 1980
    Date of Patent: May 18, 1982
    Assignees: Nippon Hoso Kyokai, Hitachi, Ltd.
    Inventors: Keiichi Shidara, Naohiro Goto, Tatsuro Kawamura, Eikyu Hiruma, Yohitsumu Ikeda, Kenkichi Tanioka, Tadaaki Hirai, Yukio Takasaki, Chushirou Kusano, Tsuyoshi Uda, Yasuhiko Nonaka