Patents by Inventor Kiyofumi Kondou

Kiyofumi Kondou 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 having super junction structure with varying width
    Patent number: 11456378
    Abstract: The disclosure reduces the risk of collapse of the wall surrounding the trench and suppresses the withstand voltage fluctuation that accompanies the manufacturing variation for a semiconductor device having a super junction structure. The semiconductor device includes a drift layer of a first conductivity type and a plurality of embedded parts embedded in the drift layer. The embedded parts are of a second conductivity type different from the first conductivity type, and the embedded parts are arranged with a first direction as a longitudinal direction and spaced from each other along a second direction that intersects the first direction. A width of each of the embedded parts in the second direction changes continuously along the first direction.
    Type: Grant
    Filed: December 19, 2018
    Date of Patent: September 27, 2022
    Assignee: LAPIS Semiconductor Co., Ltd.
    Inventors: Toshiyuki Orita, Tomomi Yamanobe, Makoto Higashihira, Yuuki Doi, Toshifumi Kobe, Masao Tsujimoto, Takao Kaji, Kiyofumi Kondou
  • SEMICONDUCTOR DEVICE AND MANUFACTURING METHOD OF SEMICONDUCTOR DEVICE
    Publication number: 20190189800
    Abstract: The disclosure reduces the risk of collapse of the wall surrounding the trench and suppresses the withstand voltage fluctuation that accompanies the manufacturing variation for a semiconductor device having a super junction structure. The semiconductor device includes a drift layer of a first conductivity type and a plurality of embedded parts embedded in the drift layer. The embedded parts are of a second conductivity type different from the first conductivity type, and the embedded parts are arranged with a first direction as a longitudinal direction and spaced from each other along a second direction that intersects the first direction. A width of each of the embedded parts in the second direction changes continuously along the first direction.
    Type: Application
    Filed: December 19, 2018
    Publication date: June 20, 2019
    Applicant: LAPIS Semiconductor Co., Ltd.
    Inventors: Toshiyuki Orita, Tomomi Yamanobe, Makoto Higashihira, Yuuki Doi, Toshifumi Kobe, Masao Tsujimoto, Takao Kaji, Kiyofumi Kondou