Patents by Inventor Takefumi Shirako

Takefumi Shirako 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).

  • Publication number: 20220392514
    Abstract: Electrically conductive line side-by-side running distance equalization and related apparatuses and systems. An apparatus includes a first sense amplifier, a second sense amplifier, a first pair of lines, and a second pair of lines. The first sense amplifier includes a first pull-up sense amplifier and a first pull-down sense amplifier. The first pair of lines electrically connects a first pull-up sense amplifier of the first sense amplifier to a first pull-down sense amplifier of the first sense amplifier. The second pair of lines electrically connects the second pull-up sense amplifier to the second pull-down sense amplifier. Parallel running distances between lines of the first pair of lines and the second pair of lines are equalized by a wiring twist of the first pair of lines and three wiring twists of the second pair of lines.
    Type: Application
    Filed: August 15, 2022
    Publication date: December 8, 2022
    Inventors: Yuko Watanabe, Takefumi Shirako
  • Patent number: 11450375
    Abstract: In some examples, a subword driver block of a memory device includes a plurality of active regions of a first type and a plurality of active regions of a second type adjacent to the plurality of active regions of the first type. The subword driver block further includes a plurality of first gate electrodes overlapping with the plurality of active regions of the first type to form a plurality of first transistors, and a plurality of second gate electrodes overlapping with the plurality of active regions of the first type to form a plurality of second transistors. Each of the second transistors is shared by a first subword driver and a second subword driver. Each of the second transistors may include a drain and a source respectively coupled to a first and second word line, which are driven by the first subword driver and the second subword driver, respectively.
    Type: Grant
    Filed: August 28, 2020
    Date of Patent: September 20, 2022
    Assignee: Micron Technology, Inc.
    Inventors: Takefumi Shirako, Masahiro Yokomichi, Kyuseok Lee, Sangmin Hwang
  • Patent number: 11417389
    Abstract: Electrically conductive line side-by-side running distance equalization and related apparatuses and systems. An apparatus includes a first sense amplifier including a first pull-up sense amplifier, a first pull-down sense amplifier, and a first pair of lines connecting the first pull-up sense amplifier to the first pull-down sense amplifier. The apparatus also includes a second sense amplifier adjacent to the first sense amplifier. The second sense amplifier includes a second pull-up sense amplifier, a second pull-down sense amplifier, and a second pair of lines connecting the second pull-up sense amplifier to the second pull-down sense amplifier. Parallel running distances between lines of the first pair of lines and the second pair of lines are equalized by a wiring twist of at least one of the first pair of lines or the second pair of lines in a region of the first pull-up sense amplifier and the second pull-up sense amplifier.
    Type: Grant
    Filed: June 30, 2020
    Date of Patent: August 16, 2022
    Assignee: Micron Technology, Inc.
    Inventors: Yuko Watanabe, Takefumi Shirako
  • Publication number: 20220068351
    Abstract: In some examples, a subword driver block of a memory device includes a plurality of active regions of a first type and a plurality of active regions of a second type adjacent to the plurality of active regions of the first type. The subword driver block further includes a plurality of first gate electrodes overlapping with the plurality of active regions of the first type to form a plurality of first transistors, and a plurality of second gate electrodes overlapping with the plurality of active regions of the first type to form a plurality of second transistors. Each of the second transistors is shared by a first subword driver and a second subword driver. Each of the second transistors may include a drain and a source respectively coupled to a first and second word line, which are driven by the first subword driver and the second subword driver, respectively.
    Type: Application
    Filed: August 28, 2020
    Publication date: March 3, 2022
    Applicant: Micron Technology, Inc.
    Inventors: Takefumi Shirako, Masahiro Yokomichi, Kyuseok Lee, Sangmin Hwang
  • Publication number: 20210407578
    Abstract: Electrically conductive line side-by-side running distance equalization and related apparatuses and systems. An apparatus includes a first sense amplifier including a first pull-up sense amplifier, a first pull-down sense amplifier, and a first pair of lines connecting the first pull-up sense amplifier to the first pull-down sense amplifier. The apparatus also includes a second sense amplifier adjacent to the first sense amplifier. The second sense amplifier includes a second pull-up sense amplifier, a second pull-down sense amplifier, and a second pair of lines connecting the second pull-up sense amplifier to the second pull-down sense amplifier. Parallel running distances between lines of the first pair of lines and the second pair of lines are equalized by a wiring twist of at least one of the first pair of lines or the second pair of lines in a region of the first pull-up sense amplifier and the second pull-up sense amplifier.
    Type: Application
    Filed: June 30, 2020
    Publication date: December 30, 2021
    Inventors: Yuko Watanabe, Takefumi Shirako