Patents by Inventor Toshitake Nakata

Toshitake Nakata 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).

  • Patent number: 5187547
    Abstract: A light emitting diode device comprises an n type silicon carbide substrate having first and second major surfaces opposite to each other at least inclined at a predetermined angle not less than 3.degree. from a {0001} plane, an n type silicon carbide layer grown on the first major surface, a p type silicon carbide layer grown on the n type silicon carbide layer, a p type ohmic electrode formed on a partial area of the p type silicon carbide layer, and an n type ohmic electrode formed on a partial area of the second major surface. The diode element has a substantially trapezoidal form in a cross section orthogonal to the first major surface. The diode element has the side of the p type silicon carbide layer broader than the side of the second major surface and is supported at the side of the type silicon carbide layer fixed to a supporting stem.
    Type: Grant
    Filed: November 19, 1990
    Date of Patent: February 16, 1993
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Tatsuhiko Niina, Kiyoshi Ohta, Toshitake Nakata, Yasuhiko Matsushita, Takahiro Uetani, Yoshiharu Fujikawa