Patents by Inventor Noriyasu Kumazaki
Noriyasu Kumazaki 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).
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Patent number: 12159677Abstract: A memory device includes a memory cell array, a voltage generation circuit generating one or more voltages supplied to the memory cell array, an input/output circuit receiving an address indicating a region in the memory cell array, and a control circuit controlling operations of the memory cell array. The control circuit supplies a non-selection voltage of the voltages before a ready/busy signal changes from a ready state to a busy state.Type: GrantFiled: June 5, 2023Date of Patent: December 3, 2024Assignee: Kioxia CorporationInventors: Akio Sugahara, Takaya Handa, Ryosuke Isomura, Kazuto Uehara, Junichi Sato, Norichika Asaoka, Masashi Yamaoka, Bushnaq Sanad, Yuzuru Shibazaki, Noriyasu Kumazaki, Yuri Terada
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Publication number: 20240233835Abstract: A semiconductor device includes a regulator circuit, a charge pump circuit, and a control circuit. The regulator circuit is configured to regulate a voltage input from outside and output a regulated voltage. The charge pump circuit is configured to receive the regulated voltage as an input voltage, boost the input voltage, and output a boosted voltage. The control circuit is configured to cause the regulator circuit to vary a voltage level of the regulated voltage based on voltage value information about the voltage input from the outside.Type: ApplicationFiled: January 10, 2024Publication date: July 11, 2024Inventors: Yoshinao SUZUKI, Kazuto SHITARA, Kenta SHIBASAKI, Noriyasu KUMAZAKI
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Patent number: 11915760Abstract: According to one embodiment, a semiconductor storage device includes a first memory string including a first memory transistor, a first word line connected to a gate electrode of the first memory transistor, a source line connected to one end of the memory string, and a first connection transistor connected between the first word line and the source line.Type: GrantFiled: April 12, 2023Date of Patent: February 27, 2024Assignee: Kioxia CorporationInventors: Sanad Bushnaq, Noriyasu Kumazaki, Masashi Yamaoka
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Patent number: 11862293Abstract: A semiconductor memory device includes memory cell arrays including a first memory cell and a first word line connected to the first memory cell, a first wiring electrically connected to the first word lines corresponding to the memory cell arrays, a driver circuit electrically connected to the first wiring, second wirings electrically connected to the first wiring via the driver circuit, a voltage generation circuit including output terminals disposed corresponding to the second wirings, and first circuits disposed corresponding to the memory cell arrays. The voltage generation circuit is electrically connected to the first word lines via a first current path including the second wirings, the driver circuit, and the first wiring. The voltage generation circuit is electrically connected to the first word lines via a second current path including the second wirings and the first circuits and without including the driver circuit.Type: GrantFiled: December 9, 2021Date of Patent: January 2, 2024Assignee: KIOXIA CORPORATIONInventor: Noriyasu Kumazaki
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Publication number: 20230317177Abstract: A memory device includes a memory cell array, a voltage generation circuit generating one or more voltages supplied to the memory cell array, an input/output circuit receiving an address indicating a region in the memory cell array, and a control circuit controlling operations of the memory cell array. The control circuit supplies a non-selection voltage of the voltages before a ready/busy signal changes from a ready state to a busy state.Type: ApplicationFiled: June 5, 2023Publication date: October 5, 2023Applicant: Kioxia CorporationInventors: Akio SUGAHARA, Takaya HANDA, Ryosuke ISOMURA, Kazuto UEHARA, Junichi SATO, Norichika ASAOKA, Masashi YAMAOKA, Bushnaq SANAD, Yuzuru SHIBAZAKI, Noriyasu KUMAZAKI, Yuri TERADA
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Publication number: 20230253045Abstract: According to one embodiment, a semiconductor storage device includes a first memory string including a first memory transistor, a first word line connected to a gate electrode of the first memory transistor, a source line connected to one end of the memory string, and a first connection transistor connected between the first word line and the source line.Type: ApplicationFiled: April 12, 2023Publication date: August 10, 2023Inventors: Sanad BUSHNAQ, Noriyasu KUMAZAKI, Masashi YAMAOKA
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Patent number: 11705210Abstract: A memory device includes a memory cell array, a voltage generation circuit generating one or more voltages supplied to the memory cell array, an input/output circuit receiving an address indicating a region in the memory cell array and a control circuit controlling operations of the memory cell array. The voltage generation circuit generates the voltages before a ready/busy signal changing from a ready state to a busy state.Type: GrantFiled: January 7, 2022Date of Patent: July 18, 2023Assignee: Kioxia CorporationInventors: Akio Sugahara, Takaya Handa, Ryosuke Isomura, Kazuto Uehara, Junichi Sato, Norichika Asaoka, Masashi Yamaoka, Bushnaq Sanad, Yuzuru Shibazaki, Noriyasu Kumazaki, Yuri Terada
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Patent number: 11657874Abstract: According to one embodiment, a semiconductor storage device includes a first memory string including a first memory transistor, a first word line connected to a gate electrode of the first memory transistor, a source line connected to one end of the memory string, and a first connection transistor connected between the first word line and the source line.Type: GrantFiled: September 21, 2021Date of Patent: May 23, 2023Assignee: Kioxia CorporationInventors: Sanad Bushnaq, Noriyasu Kumazaki, Masashi Yamaoka
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Publication number: 20220406351Abstract: A semiconductor memory device includes memory cell arrays including a first memory cell and a first word line connected to the first memory cell, a first wiring electrically connected to the first word lines corresponding to the memory cell arrays, a driver circuit electrically connected to the first wiring, second wirings electrically connected to the first wiring via the driver circuit, a voltage generation circuit including output terminals disposed corresponding to the second wirings, and first circuits disposed corresponding to the memory cell arrays. The voltage generation circuit is electrically connected to the first word lines via a first current path including the second wirings, the driver circuit, and the first wiring. The voltage generation circuit is electrically connected to the first word lines via a second current path including the second wirings and the first circuits and without including the driver circuit.Type: ApplicationFiled: December 9, 2021Publication date: December 22, 2022Applicant: KIOXIA CORPORATIONInventor: Noriyasu KUMAZAKI
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Publication number: 20220130469Abstract: A memory device includes a memory cell array, a voltage generation circuit generating one or more voltages supplied to the memory cell array, an input/output circuit receiving an address indicating a region in the memory cell array and a control circuit controlling operations of the memory cell array. The voltage generation circuit generates the voltages before a ready/busy signal changing from a ready state to a busy state.Type: ApplicationFiled: January 7, 2022Publication date: April 28, 2022Applicant: TOSHIBA MEMORY CORPORATIONInventors: Akio SUGAHARA, Takaya HANDA, Ryosuke ISOMURA, Kazuto UEHARA, Junichi SATO, Norichika ASAOKA, Masashi YAMAOKA, Bushnaq SANAD, Yuzuru SHIBAZAKI, Noriyasu KUMAZAKI, Yuri TERADA
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Patent number: 11257551Abstract: A method of controlling a memory device includes receiving an address indicating a region in a memory cell array and generating one or more voltages supplied to the memory cell array in parallel with receiving the address.Type: GrantFiled: February 5, 2021Date of Patent: February 22, 2022Assignee: TOSHIBA MEMORY CORPORATIONInventors: Akio Sugahara, Takaya Handa, Ryosuke Isomura, Kazuto Uehara, Junichi Sato, Norichika Asaoka, Masashi Yamaoka, Bushnaq Sanad, Yuzuru Shibazaki, Noriyasu Kumazaki, Yuri Terada
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Publication number: 20220005531Abstract: According to one embodiment, a semiconductor storage device includes a first memory string including a first memory transistor, a first word line connected to a gate electrode of the first memory transistor, a source line connected to one end of the memory string, and a first connection transistor connected between the first word line and the source line.Type: ApplicationFiled: September 21, 2021Publication date: January 6, 2022Inventors: Sanad BUSHNAQ, Noriyasu Kumazaki, Masashi Yamaoka
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Patent number: 11152069Abstract: According to one embodiment, a semiconductor storage device includes a first memory string including a first memory transistor, a first word line connected to a gate electrode of the first memory transistor, a source line connected to one end of the memory string, and a first connection transistor connected between the first word line and the source line.Type: GrantFiled: August 30, 2019Date of Patent: October 19, 2021Assignee: TOSHIBA MEMORY CORPORATIONInventors: Sanad Bushnaq, Noriyasu Kumazaki, Masashi Yamaoka
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Publication number: 20210158879Abstract: A method of controlling a memory device includes receiving an address indicating a region in a memory cell array and generating one or more voltages supplied to the memory cell array in parallel with receiving the address.Type: ApplicationFiled: February 5, 2021Publication date: May 27, 2021Applicant: TOSHIBA MEMORY CORPORATIONInventors: Akio SUGAHARA, Takaya HANDA, Ryosuke ISOMURA, Kazuto UEHARA, Junichi SATO, Norichika ASAOKA, Masashi YAMAOKA, Bushnaq SANAD, Yuzuru SHIBAZAKI, Noriyasu KUMAZAKI, Yuri TERADA
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Patent number: 10957404Abstract: According one embodiment, a memory device includes: a memory cell array; a voltage generation circuit generating one or more voltages supplied to the memory cell array; an input/output circuit receiving an address indicating a region in the memory cell array; and a control circuit controlling operations of the memory cell array. The voltage generation circuit generates the voltages during reception of the address.Type: GrantFiled: September 11, 2019Date of Patent: March 23, 2021Assignee: TOSHIBA MEMORY CORPORATIONInventors: Akio Sugahara, Takaya Handa, Ryosuke Isomura, Kazuto Uehara, Junichi Sato, Norichika Asaoka, Masashi Yamaoka, Bushnaq Sanad, Yuzuru Shibazaki, Noriyasu Kumazaki, Yuri Terada
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Patent number: 10930357Abstract: A semiconductor storage device includes a memory cell array, a temperature sensor configured to generate a first temperature signal corresponding to a temperature of the memory cell array in response to a first command periodically generated during a waiting period of the memory cell array, a storage circuit configured to store the first temperature signal and update the first temperature signal each time the first command is generated during the waiting period, and a voltage generation circuit configured to generate a voltage to be applied to the memory cell array based on the first temperature signal stored in the storage circuit.Type: GrantFiled: August 29, 2019Date of Patent: February 23, 2021Assignee: TOSHIBA MEMORY CORPORATIONInventors: Yuri Terada, Noriyasu Kumazaki, Yasufumi Kajiyama, Akio Sugahara, Masahiro Yoshihara
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Patent number: 10896735Abstract: According to one embodiment, a semiconductor memory device includes: a memory cell array including a first memory cell, a first word line, a first circuit coupled to the first word line, a first driver used for a write operation and a read operation, a second driver used for an erase operation, and a voltage generator. The first circuit includes: a second circuit capable of electrically coupling the first word line and a first interconnect; a third circuit capable of electrically coupling the first interconnect and a second interconnect; a fourth circuit capable of electrically coupling the second interconnect and the first driver in the write and read operations; and a fifth circuit capable of electrically coupling the second interconnect and the second driver in the erase operation.Type: GrantFiled: September 9, 2019Date of Patent: January 19, 2021Assignee: TOSHIBA MEMORY CORPORATIONInventors: Bushnaq Sanad, Noriyasu Kumazaki, Yuzuru Shibazaki
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Publication number: 20200202958Abstract: According one embodiment, a memory device includes: a memory cell array; a voltage generation circuit generating one or more voltages supplied to the memory cell array; an input/output circuit receiving an address indicating a region in the memory cell array; and a control circuit controlling operations of the memory cell array. The voltage generation circuit generates the voltages during reception of the address.Type: ApplicationFiled: September 11, 2019Publication date: June 25, 2020Applicant: TOSHIBA MEMORY CORPORATIONInventors: Akio SUGAHARA, Takaya HANDA, Ryosuke ISOMURA, Kazuto UEHARA, Junichi SATO, Norichika ASAOKA, Masashi YAMAOKA, Bushnaq SANAD, Yuzuru SHIBAZAKI, Noriyasu KUMAZAKI, Yuri TERADA
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Publication number: 20200202957Abstract: A semiconductor storage device includes a memory cell array, a temperature sensor configured to generate a first temperature signal corresponding to a temperature of the memory cell array in response to a first command periodically generated during a waiting period of the memory cell array, a storage circuit configured to store the first temperature signal and update the first temperature signal each time the first command is generated during the waiting period, and a voltage generation circuit configured to generate a voltage to be applied to the memory cell array based on the first temperature signal stored in the storage circuit.Type: ApplicationFiled: August 29, 2019Publication date: June 25, 2020Inventors: Yuri TERADA, Noriyasu KUMAZAKI, Yasufumi KAJIYAMA, Akio SUGAHARA, Masahiro YOSHIHARA
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Publication number: 20200202937Abstract: According to one embodiment, a semiconductor storage device includes a first memory string including a first memory transistor, a first word line connected to a gate electrode of the first memory transistor, a source line connected to one end of the memory string, and a first connection transistor connected between the first word line and the source line.Type: ApplicationFiled: August 30, 2019Publication date: June 25, 2020Inventors: Sanad BUSHNAQ, Noriyasu KUMAZAKI, Masashi YAMAOKA