Patents by Inventor Tsukasa TOKUTOMI

Tsukasa TOKUTOMI 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: 20180277226
    Abstract: According to an embodiment, a semiconductor memory, on receiving a first command, applies a voltage within a first range and a voltage within a second range to a word line and reads a first bit from a memory cell, and, on receiving a second command, applies a voltage within a third range to the word line and reads a second bit from the memory cell. The controller issues the first command a plurality of times and changes the voltages to be applied to the word line within the first range and the second range in accordance with the plurality of first commands, specifies a first and second voltage within the first and the second range, respectively, and estimates a third voltage within the third range. The voltage applied to read the second bit is the estimated third voltage.
    Type: Application
    Filed: September 7, 2017
    Publication date: September 27, 2018
    Applicant: Toshiba Memory Corporation
    Inventors: Tsukasa TOKUTOMI, Masanobu Shirakawa, Marie Takada
  • Publication number: 20180190348
    Abstract: According to an embodiment, a control circuitry performing: a first operation of reading data out of a memory cell with a first voltage applied to a word line while changing the first voltage by a first shift amount within a first range, and a second operation of reading data out of the memory cell with a second voltage applied to the word line while changing the second voltage by a second shift amount within a second range, wherein the second shift amount is smaller than the first shift amount, and wherein the control circuitry performs the second operation to apply the second voltage to the word line subsequently to application of the first voltage to the word line in the first operation.
    Type: Application
    Filed: September 7, 2017
    Publication date: July 5, 2018
    Applicant: Toshiba Memory Corporation
    Inventors: Tsukasa TOKUTOMI, Masanobu SHIRAKAWA, Marie TAKADA