Patents by Inventor Takafumi KOUMOTO

Takafumi KOUMOTO 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).

  • Semiconductor device and method for controlling same
    Patent number: 10818750
    Abstract: A semiconductor device includes a semiconductor part including first to fifth layers; an electrode on a front surface of the semiconductor part; first and second control electrodes between the semiconductor part and the electrode. The first layer includes first and second portions alternately arranged along the front surface of the semiconductor part. The second layer is positioned between the first and second portions of the first layer. The first and second control electrodes are placed at boundaries of the first and second portions and the second layer, respectively. The third layer is provided between the second electrode and the first and second portions of the first layer. The fourth and fifth layers are selectively provided between the third layer and the second electrode. The first control electrode is opposed to the first, third and fourth layers. The second control electrode is opposed to the first, third and fifth layers.
    Type: Grant
    Filed: August 15, 2019
    Date of Patent: October 27, 2020
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION
    Inventors: Hiroaki Yamashita, Syotaro Ono, Hisao Ichijo, Takafumi Koumoto
  • SEMICONDUCTOR DEVICE AND METHOD FOR CONTROLLING SAME
    Publication number: 20200303495
    Abstract: A semiconductor device includes a semiconductor part including first to fifth layers; an electrode on a front surface of the semiconductor part; first and second control electrodes between the semiconductor part and the electrode. The first layer includes first and second portions alternately arranged along the front surface of the semiconductor part. The second layer is positioned between the first and second portions of the first layer. The first and second control electrodes are placed at boundaries of the first and second portions and the second layer, respectively. The third layer is provided between the second electrode and the first and second portions of the first layer. The fourth and fifth layers are selectively provided between the third layer and the second electrode. The first control electrode is opposed to the first, third and fourth layers. The second control electrode is opposed to the first, third and fifth layers.
    Type: Application
    Filed: August 15, 2019
    Publication date: September 24, 2020
    Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION
    Inventors: Hiroaki YAMASHITA, Syotaro ONO, Hisao ICHIJO, Takafumi KOUMOTO