Patents by Inventor Tetsuhiki Isobe

Tetsuhiki Isobe 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 for producing light-emitting material
    Patent number: 6117363
    Abstract: There is provided a novel method for manufacturing a light-emitting material composed of II-VI group semiconductors having a nano structure crystal and which is optimally doped with an activator. In a manufacturing method for the light-emitting material, a II-VI group semiconductor doped with an activator by a liquid phase reaction having a co-precipitation product is formed and an organic acid is added to the liquid phase reaction system. In another manufacturing method for the light-emitting material, a II-VI group semiconductor doped with an activator by a liquid phase reaction having a product co-precipitation is formed and a high molecular organic acid or polystyrene is added after the end of the liquid phase reaction.
    Type: Grant
    Filed: March 10, 1998
    Date of Patent: September 12, 2000
    Assignee: Sony Corporation
    Inventors: Masaru Ihara, Katsutoshi Ohno, Mamoru Sennna, Tetsuhiki Isobe, Takahiro Igarashi