Patents by Inventor Toshiki Hisada

Toshiki Hisada 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: 20240113058
    Abstract: A semiconductor storage device includes first and second chips. The first chip includes a first semiconductor substrate, first conductive layers arranged in a first direction and extending in a second direction, a semiconductor column extending in the first direction and facing the first conductive layers, a first charge storage film formed between the first conductive layers and the semiconductor column, a plurality of first transistors on the first semiconductor substrate, and first bonding electrodes electrically connected to a portion of the plurality of first transistors. The second chip includes a second semiconductor substrate, a plurality of second transistors on the second semiconductor substrate, and second bonding electrodes electrically connected to a portion of the plurality of second transistors, and bonded to the first bonding electrodes.
    Type: Application
    Filed: December 13, 2023
    Publication date: April 4, 2024
    Inventors: Nobuaki OKADA, Toshiki HISADA
  • Patent number: 11881465
    Abstract: A semiconductor storage device includes first and second chips. The first chip includes a first semiconductor substrate, first conductive layers arranged in a first direction and extending in a second direction, a semiconductor column extending in the first direction and facing the first conductive layers, a first charge storage film formed between the first conductive layers and the semiconductor column, a plurality of first transistors on the first semiconductor substrate, and first bonding electrodes electrically connected to a portion of the plurality of first transistors. The second chip includes a second semiconductor substrate, a plurality of second transistors on the second semiconductor substrate, and second bonding electrodes electrically connected to a portion of the plurality of second transistors, and bonded to the first bonding electrodes.
    Type: Grant
    Filed: February 24, 2021
    Date of Patent: January 23, 2024
    Assignee: Kioxia Corporation
    Inventors: Nobuaki Okada, Toshiki Hisada
  • Publication number: 20230207012
    Abstract: A semiconductor memory device includes a memory cell unit, word lines, a driver circuit, and first transistors. The word lines are connected to the control gates of 0-th to N-th memory cells. The (N+1) number of first transistors transfer the voltage to the word lines respectively. Above one of the first transistors which transfers the voltage to an i-th (i is a natural number in the range of 0 to N) word line, M (M<N) of the word lines close to the i-th word line pass through a region above the gate electrode by a first level interconnection without passing over the impurity diffused layers.
    Type: Application
    Filed: February 20, 2023
    Publication date: June 29, 2023
    Applicant: KIOXIA CORPORATION
    Inventors: Takatoshi MINAMOTO, Toshiki HISADA, Dai NAKAMURA
  • Patent number: 11610630
    Abstract: A semiconductor memory device includes a memory cell unit, word lines, a driver circuit, and first transistors. The word lines are connected to the control gates of 0-th to N-th memory cells. The (N+1) number of first transistors transfer the voltage to the word lines respectively. Above one of the first transistors which transfers the voltage to an i-th (i is a natural number in the range of 0 to N) word line, M (M<N) of the word lines close to the i-th word line pass through a region above the gate electrode by a first level interconnection without passing over the impurity diffused layers.
    Type: Grant
    Filed: March 17, 2021
    Date of Patent: March 21, 2023
    Assignee: Kioxia Corporation
    Inventors: Takatoshi Minamoto, Toshiki Hisada, Dai Nakamura
  • Patent number: 11302398
    Abstract: According to one embodiment, a first well of the first conductivity type which is formed in a substrate. a second well of a second conductivity type which is formed in the first well. The plurality of memory cells, the plurality of first bit line select transistors, and the plurality of second bit line select transistors are formed in the second well, and the plurality of first bit line select transistors and the plurality of second bit line select transistors are arranged on a side of the sense amplifier with respect to the plurality of memory cells of the plurality of bit lines.
    Type: Grant
    Filed: September 17, 2020
    Date of Patent: April 12, 2022
    Assignee: KIOXIA CORPORATION
    Inventors: Katsuaki Isobe, Noboru Shibata, Toshiki Hisada
  • Publication number: 20220077088
    Abstract: A semiconductor storage device includes first and second chips. The first chip includes a first semiconductor substrate, first conductive layers arranged in a first direction and extending in a second direction, a semiconductor column extending in the first direction and facing the first conductive layers, a first charge storage film formed between the first conductive layers and the semiconductor column, a plurality of first transistors on the first semiconductor substrate, and first bonding electrodes electrically connected to a portion of the plurality of first transistors. The second chip includes a second semiconductor substrate, a plurality of second transistors on the second semiconductor substrate, and second bonding electrodes electrically connected to a portion of the plurality of second transistors, and bonded to the first bonding electrodes.
    Type: Application
    Filed: February 24, 2021
    Publication date: March 10, 2022
    Inventors: Nobuaki OKADA, Toshiki HISADA
  • Publication number: 20210202002
    Abstract: A semiconductor memory device includes a memory cell unit, word lines, a driver circuit, and first transistors. The word lines are connected to the control gates of 0-th to N-th memory cells. The (N+1) number of first transistors transfer the voltage to the word lines respectively. Above one of the first transistors which transfers the voltage to an i-th (i is a natural number in the range of 0 to N) word line, M (M<N) of the word lines close to the i-th word line pass through a region above the gate electrode by a first level interconnection without passing over the impurity diffused layers.
    Type: Application
    Filed: March 17, 2021
    Publication date: July 1, 2021
    Applicant: TOSHIBA MEMORY CORPORATION
    Inventors: Takatoshi MINAMOTO, Toshiki HISADA, Dai NAKAMURA
  • Patent number: 10978151
    Abstract: A semiconductor memory device includes a memory cell unit, word lines, a driver circuit, and first transistors. The word lines are connected to the control gates of 0-th to N-th memory cells. The (N+1) number of first transistors transfer the voltage to the word lines respectively. Above one of the first transistors which transfers the voltage to an i-th (i is a natural number in the range of 0 to N) word line, M (M<N) of the word lines close to the i-th word line pass through a region above the gate electrode by a first level interconnection without passing over the impurity diffuse layers.
    Type: Grant
    Filed: August 15, 2019
    Date of Patent: April 13, 2021
    Assignee: TOSHIBA MEMORY CORPORATION
    Inventors: Takatoshi Minamoto, Toshiki Hisada, Dai Nakamura
  • Publication number: 20210005266
    Abstract: According to one embodiment, a first well of the first conductivity type which is formed in a substrate. a second well of a second conductivity type which is formed in the first well. The plurality of memory cells, the plurality of first bit line select transistors, and the plurality of second bit line select transistors are formed in the second well, and the plurality of first bit line select transistors and the plurality of second bit line select transistors are arranged on a side of the sense amplifier with respect to the plurality of memory cells of the plurality of bit lines.
    Type: Application
    Filed: September 17, 2020
    Publication date: January 7, 2021
    Applicant: Toshiba Memory Corporation
    Inventors: Katsuaki ISOBE, Noboru SHIBATA, Toshiki HISADA
  • Patent number: 10783971
    Abstract: According to one embodiment, a first well of the first conductivity type which is formed in a substrate. a second well of a second conductivity type which is formed in the first well. The plurality of memory cells, the plurality of first bit line select transistors, and the plurality of second bit line select transistors are formed in the second well, and the plurality of first bit line select transistors and the plurality of second bit line select transistors are arranged on a side of the sense amplifier with respect to the plurality of memory cells of the plurality of bit lines.
    Type: Grant
    Filed: May 24, 2019
    Date of Patent: September 22, 2020
    Assignee: Toshiba Memory Corporation
    Inventors: Katsuaki Isobe, Noboru Shibata, Toshiki Hisada
  • Publication number: 20190371404
    Abstract: A semiconductor memory device includes a memory cell unit, word lines, a driver circuit, and first transistors. The word lines are connected to the control gates of 0-th to N-th memory cells. The (N+1) number of first transistors transfer the voltage to the word lines respectively. Above one of the first transistors which transfers the voltage to an i-th (i is a natural number in the range of 0 to N) word line, M (M<N) of the word lines close to the i-th word line pass through a region above the gate electrode by a first level interconnection without passing over the impurity diffuse layers.
    Type: Application
    Filed: August 15, 2019
    Publication date: December 5, 2019
    Applicant: TOSHIBA MEMORY CORPORATION
    Inventors: Takatoshi Minamoto, Toshiki Hisada, Dai Nakamura
  • Patent number: 10431309
    Abstract: A semiconductor memory device includes a memory cell unit, word lines, a driver circuit, and first transistors. The word lines are connected to the control gates of 0-th to N-th memory cells. The (N+1) number of first transistors transfer the voltage to the word lines respectively. Above one of the first transistors which transfers the voltage to an i-th (i is a natural number in the range of 0 to N) word line, M (M<N) of the word lines close to the i-th word line pass through a region above the gate electrode by a first level interconnection without passing over the impurity diffused layers.
    Type: Grant
    Filed: April 9, 2019
    Date of Patent: October 1, 2019
    Assignee: TOSHIBA MEMORY CORPORATION
    Inventors: Takatoshi Minamoto, Toshiki Hisada, Dai Nakamura
  • Publication number: 20190279721
    Abstract: According to one embodiment, a first well of the first conductivity type which is formed in a substrate. a second well of a second conductivity type which is formed in the first well. The plurality of memory cells, the plurality of first bit line select transistors, and the plurality of second bit line select transistors are formed in the second well, and the plurality of first bit line select transistors and the plurality of second bit line select transistors are arranged on a side of the sense amplifier with respect to the plurality of memory cells of the plurality of bit lines.
    Type: Application
    Filed: May 24, 2019
    Publication date: September 12, 2019
    Applicant: Toshiba Memory Corporation
    Inventors: Katsuaki Isobe, Noboru Shibata, Toshiki Hisada
  • Publication number: 20190237143
    Abstract: A semiconductor memory device includes a memory cell unit, word lines, a driver circuit, and first transistors. The word lines are connected to the control gates of 0-th to N-th memory cells. The (N+1) number of first transistors transfer the voltage to the word lines respectively. Above one of the first transistors which transfers the voltage to an i-th (i is a natural number in the range of 0 to N) word line, M (M<N) of the word lines close to the i-th word line pass through a region above the gate electrode by a first level interconnection without passing over the impurity diffused layers.
    Type: Application
    Filed: April 9, 2019
    Publication date: August 1, 2019
    Applicant: TOSHIBA MEMORY CORPORATION
    Inventors: Takatoshi Minamoto, Toshiki Hisada, Dai Nakamura
  • Patent number: 10347341
    Abstract: According to one embodiment, a first well of the first conductivity type which is formed in a substrate. a second well of a second conductivity type which is formed in the first well. The plurality of memory cells, the plurality of first bit line select transistors, and the plurality of second bit line select transistors are formed in the second well, and the plurality of first bit line select transistors and the plurality of second bit line select transistors are arranged on a side of the sense amplifier with respect to the plurality of memory cells of the plurality of bit lines.
    Type: Grant
    Filed: March 5, 2018
    Date of Patent: July 9, 2019
    Assignee: TOSHIBA MEMORY CORPORATION
    Inventors: Katsuaki Isobe, Noboru Shibata, Toshiki Hisada
  • Patent number: 10304538
    Abstract: A semiconductor memory device includes a memory cell unit, word lines, a driver circuit, and first transistors. The word lines are connected to the control gates of 0-th to N-th memory cells. The (N+1) number of first transistors transfer the voltage to the word lines respectively. Above one of the first transistors which transfers the voltage to an i-th (i is a natural number in the range of 0 to N) word line, M (M<N) of the word lines close to the i-th word line pass through a region above the gate electrode by a first level interconnection without passing over the impurity diffused layers.
    Type: Grant
    Filed: July 17, 2018
    Date of Patent: May 28, 2019
    Assignee: TOSHIBA MEMORY CORPORATION
    Inventors: Takatoshi Minamoto, Toshiki Hisada, Dai Nakamura
  • Publication number: 20180322924
    Abstract: A semiconductor memory device includes a memory cell unit, word lines, a driver circuit, and first transistors. The word lines are connected to the control gates of 0-th to N-th memory cells. The (N+1) number of first transistors transfer the voltage to the word lines respectively. Above one of the first transistors which transfers the voltage to an i-th (i is a natural number in the range of 0 to N) word line, M (M<N) of the word lines close to the i-th word line pass through a region above the gate electrode by a first level interconnection without passing over the impurity diffused layers.
    Type: Application
    Filed: July 17, 2018
    Publication date: November 8, 2018
    Applicant: TOSHIBA MEMORY CORPORATION
    Inventors: Takatoshi MINAMOTO, Toshiki HISADA, Dai NAKAMURA
  • Patent number: 10068647
    Abstract: A semiconductor memory device includes a first block that includes a first set of word lines, a second block that includes a second set of word lines and is adjacent to the first block in a first direction, a first transistor group adjacent to the first and second blocks in a second direction crossing the first direction, and a second transistor group adjacent to the first transistor group in the second direction. Each of the word lines in the first set is electrically connected to a transistor in the first transistor group, and each of the word lines in the second set is electrically connected to a transistor in the first transistor group.
    Type: Grant
    Filed: August 10, 2016
    Date of Patent: September 4, 2018
    Assignee: Toshiba Memory Corporation
    Inventors: Nobuaki Okada, Toshiki Hisada
  • Patent number: 10049745
    Abstract: A semiconductor memory device includes a memory cell unit, word lines, a driver circuit, and first transistors. The word lines are connected to the control gates of 0-th to N-th memory cells. The (N+1) number of first transistors transfer the voltage to the word lines respectively. Above one of the first transistors which transfers the voltage to an i-th (i is a natural number in the range of 0 to N) word line, M (M<N) of the word lines close to the i-th word line pass through a region above the gate electrode by a first level interconnection without passing over the impurity diffused layers.
    Type: Grant
    Filed: May 19, 2017
    Date of Patent: August 14, 2018
    Assignee: TOSHIBA MEMORY CORPORATION
    Inventors: Takatoshi Minamoto, Toshiki Hisada, Dai Nakamura
  • Publication number: 20180190359
    Abstract: According to one embodiment, a first well of the first conductivity type which is formed in a substrate. a second well of a second conductivity type which is formed in the first well. The plurality of memory cells, the plurality of first bit line select transistors, and the plurality of second bit line select transistors are formed in the second well, and the plurality of first bit line select transistors and the plurality of second bit line select transistors are arranged on a side of the sense amplifier with respect to the plurality of memory cells of the plurality of bit lines.
    Type: Application
    Filed: March 5, 2018
    Publication date: July 5, 2018
    Applicant: Toshiba Memory Corporation
    Inventors: Katsuaki Isobe, Noboru Shibata, Toshiki Hisada