Patents by Inventor Ryohei Shoji

Ryohei Shoji 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).

  • PERIODIC WRITE TO IMPROVE DATA RETENTION
    Publication number: 20220375524
    Abstract: A nonvolatile memory control method includes a step of writing, repeatedly to a nonvolatile memory cells. The method continues with detecting when writing reaches a writing threshold value. Upon reaching the writing threshold, the method continues with driving a charge to at least one parasitic area intermediate at least two charge storage areas of the nonvolatile memory cells to improve data retention in at least one of the at least two charge storage areas of the nonvolatile memory cells.
    Type: Application
    Filed: May 18, 2021
    Publication date: November 24, 2022
    Applicant: SanDisk Technologies LLC
    Inventors: Dengtao Zhao, Ravi Kumar, Chin-Yi Chen, Ryohei Shoji
  • Periodic write to improve data retention
    Patent number: 11508440
    Abstract: A nonvolatile memory control method includes a step of writing, repeatedly to a nonvolatile memory cells. The method continues with detecting when writing reaches a writing threshold value. Upon reaching the writing threshold, the method continues with driving a charge to at least one parasitic area intermediate at least two charge storage areas of the nonvolatile memory cells to improve data retention in at least one of the at least two charge storage areas of the nonvolatile memory cells.
    Type: Grant
    Filed: May 18, 2021
    Date of Patent: November 22, 2022
    Assignee: SanDisk Technologies LLC
    Inventors: Dengtao Zhao, Ravi Kumar, Chin-Yi Chen, Ryohei Shoji