Patents by Inventor Toshifumi Watanabe
Toshifumi Watanabe 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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Publication number: 20240097658Abstract: A semiconductor device includes a first pad, a second pad, a first output driver provided for the first pad and configured to output a first transmission signal to the first pad, a second output driver provided for the second pad and configured to output a second transmission signal to the second pad, a register that stores first and second calibration values, a first reference resistor for the first pad and having a resistance value that is set according to the first calibration value, a second reference resistor for the second pad and having a resistance value that is set according to the second calibration value, a first setting circuit configured to calibrate a resistance value of the first output driver using the first reference resistor, and a second setting circuit configured to calibrate a resistance value of the second output driver using the second reference resistor.Type: ApplicationFiled: March 3, 2023Publication date: March 21, 2024Inventors: Fumiya WATANABE, Toshifumi WATANABE, Kazuhiko SATOU, Shouichi OZAKI, Kenro KUBOTA, Atsuko SAEKI, Ryota TSUCHIYA, Harumi ABE
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Publication number: 20240075410Abstract: There is provided a gas solution supply apparatus capable of preventing bubbles from being generated in use at a point-of-use even if gas solution to be provided to a point-of-use has a high concentration. The gas solution supply apparatus 1 includes: a gas dissolving unit 4 that dissolves a source gas in a source liquid to produce a first gas solution; a first gas-liquid separator 10 that stores the first gas solution produced and produces a second gas solution through gas-liquid separation of the first gas solution; a pressure reducer 17 that depressurizes the second gas solution produced in the first gas-liquid separator 10; and a second gas-liquid separator 12 that stores the depressurized second gas solution and produces a third gas solution through gas-liquid separation of the second gas solution. The third gas solution is supplied to a point-of-use.Type: ApplicationFiled: August 2, 2023Publication date: March 7, 2024Inventors: Suguru OZAWA, Yuji ARAKI, Yoichi NAKAGAWA, Toshifumi WATANABE, Risa KIMURA, Ryuta KATO
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Publication number: 20240079067Abstract: A semiconductor memory device includes an output pin configured for connection with a memory controller, an output circuit configured to output through the output pin a voltage signal that changes over time in accordance with one or more bits of data to be output to the memory controller, and a control circuit configured to temporarily change a drive capability of the output circuit each time a voltage signal corresponding to one bit of the data is output through the output pin.Type: ApplicationFiled: February 28, 2023Publication date: March 7, 2024Inventors: Shouichi OZAKI, Kazuhiko SATOU, Kenro KUBOTA, Fumiya WATANABE, Atsuko SAEKI, Ryota TSUCHIYA, Harumi ABE, Toshifumi WATANABE
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Publication number: 20240055057Abstract: A semiconductor memory includes a memory cell, a bit line electrically connected to the memory cell, a sense amplifier including a first latch circuit, a first hookup circuit, a second latch circuit, a first wiring, and a first pre-charge circuit. The sense amplifier is in a first circuit area. The first hookup circuit is in a second circuit area and configured to control connection between the bit line and the sense amplifier. The first wiring is connected between the first latch circuit and the second latch circuit. The first pre-charge circuit includes a first transistor in a third circuit area between the first circuit area and the second circuit area. The first transistor has a first end connected to the first wiring at a first position in the third circuit area and a second end connectable to a terminal supplied with one of a pre-charge voltage and a ground voltage.Type: ApplicationFiled: March 1, 2023Publication date: February 15, 2024Inventors: Teppei HIGASHITSUJI, Toshifumi WATANABE
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Publication number: 20240046974Abstract: A semiconductor memory device includes a memory cell, a word line connected to the memory cell, a source line connected to the memory cell, a bit line connected to the memory cell, and a control circuit configured to perform a read operation on the memory cell. During the read operation, the control circuit applies to the word line a first voltage, a second voltage greater than the first voltage after applying the first voltage, and a third voltage greater than the first voltage and smaller than the second voltage after applying the second voltage, and applies to the source line a fourth voltage according to a timing at which the second voltage is applied to the word line, a fifth voltage smaller than the fourth voltage after applying the fourth voltage, and a sixth voltage greater than the fifth voltage after applying the fifth voltage.Type: ApplicationFiled: October 19, 2023Publication date: February 8, 2024Inventors: Toshifumi WATANABE, Naofumi ABIKO
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Publication number: 20230420054Abstract: A semiconductor memory device according to an embodiment includes a plurality of planes including a plurality of blocks each being a set of memory cells, and a sequencer configured to execute a first operation and a second operation shorter than the first operation. Upon receiving a first command set that instructs execution of the first operation, the sequencer is configured to execute the first operation. Upon receiving a second command set that instructs execution of the second operation while the first operation is being executed, the sequencer is configured to suspend the first operation and execute the second operation or execute the second operation in parallel with the first operation, based on an address of a block that is a target of the first operation and an address of a block that is a target of the second operation.Type: ApplicationFiled: September 7, 2023Publication date: December 28, 2023Applicant: Kioxia CorporationInventors: Akio SUGAHARA, Akihiro IMAMOTO, Toshifumi WATANABE, Mami KAKOI, Kohei MASUDA, Masahiro YOSHIHARA, Naofumi ABIKO
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Patent number: 11842759Abstract: A semiconductor memory device includes a memory cell, a word line connected to the memory cell, a source line connected to the memory cell, a bit line connected to the memory cell, and a control circuit configured to perform a read operation on the memory cell. During the read operation, the control circuit applies to the word line a first voltage, a second voltage greater than the first voltage after applying the first voltage, and a third voltage greater than the first voltage and smaller than the second voltage after applying the second voltage, and applies to the source line a fourth voltage according to a timing at which the second voltage is applied to the word line, a fifth voltage smaller than the fourth voltage after applying the fourth voltage, and a sixth voltage greater than the fifth voltage after applying the fifth voltage.Type: GrantFiled: July 26, 2022Date of Patent: December 12, 2023Assignee: Kioxia CorporationInventors: Toshifumi Watanabe, Naofumi Abiko
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Patent number: 11810629Abstract: A semiconductor memory device includes a memory cell array including a plurality of memory cells, a word line connected to the plurality of memory cells, a plurality of bit lines connected respectively to the plurality of memory cells, a sense amplifier connected to the plurality of bit lines, and a controller configured to execute a write operation in a plurality of program loops each including a program operation and a verify operation. The sense amplifier is configured to apply a first voltage, a second voltage higher than the first voltage, a third voltage higher than the second voltage, and a fourth voltage higher than the third voltage to first, second, third, and fourth bit lines of the plurality of bit lines, respectively, while a program voltage is applied to the word line in the program operation.Type: GrantFiled: August 31, 2022Date of Patent: November 7, 2023Assignee: Kioxia CorporationInventors: Takeshi Hioka, Toshifumi Watanabe
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Patent number: 11783899Abstract: A semiconductor memory device according to an embodiment includes a plurality of planes including a plurality of blocks each being a set of memory cells, and a sequencer configured to execute a first operation and a second operation shorter than the first operation. Upon receiving a first command set that instructs execution of the first operation, the sequencer is configured to execute the first operation. Upon receiving a second command set that instructs execution of the second operation while the first operation is being executed, the sequencer is configured to suspend the first operation and execute the second operation or execute the second operation in parallel with the first operation, based on an address of a block that is a target of the first operation and an address of a block that is a target of the second operation.Type: GrantFiled: October 26, 2022Date of Patent: October 10, 2023Assignee: Kioxia CorporationInventors: Akio Sugahara, Akihiro Imamoto, Toshifumi Watanabe, Mami Kakoi, Kohei Masuda, Masahiro Yoshihara, Naofumi Abiko
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Publication number: 20230317184Abstract: A semiconductor memory device includes a memory cell array including a plurality of memory cells, a word line connected to the plurality of memory cells, a plurality of bit lines connected respectively to the plurality of memory cells, a sense amplifier connected to the plurality of bit lines, and a controller configured to execute a write operation in a plurality of program loops each including a program operation and a verify operation. The sense amplifier is configured to apply a first voltage, a second voltage higher than the first voltage, a third voltage higher than the second voltage, and a fourth voltage higher than the third voltage to first, second, third, and fourth bit lines of the plurality of bit lines, respectively, while a program voltage is applied to the word line in the program operation.Type: ApplicationFiled: August 31, 2022Publication date: October 5, 2023Inventors: Takeshi HIOKA, Toshifumi WATANABE
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Patent number: 11648515Abstract: A gas solution manufacturing device 1 includes a gas supply line 2 configured to supply a gas as a raw material of a gas solution, a liquid supply line 3 configured to supply a liquid as a raw material of the gas solution, a gas solution production unit 4 configured to mix the gas and the liquid together to produce the gas solution, a gas-liquid separation unit 5 configured to perform gas-liquid separation of the produced gas solution into a supplied liquid to be supplied to a use point and a discharged gas to be discharged through an exhaust port, and a gas dissolving unit 6 provided in the liquid supply line 4 and configured to dissolve the discharged gas resulting from the gas-liquid separation in the liquid. The gas dissolving unit 6 is configured with a hollow fiber membrane configured with a gas permeable membrane.Type: GrantFiled: February 1, 2021Date of Patent: May 16, 2023Assignee: EBARA CORPORATIONInventors: Suguru Ozawa, Yuji Araki, Yoichi Nakagawa, Toshifumi Watanabe
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Patent number: 11584669Abstract: A gas dissolved liquid manufacturing device includes: a pump configured to pressurize a liquid; a pipe communicating with the pump; a nozzle disposed in the pipe, the nozzle being configured to generate micro bubbles using a supplied gas; and a gas-liquid separation tank whose upper part communicates with the pipe, the gas-liquid separation tank being configured to separate a gas-liquid mixture generated by the nozzle into a gas and a liquid.Type: GrantFiled: July 7, 2020Date of Patent: February 21, 2023Assignee: EBARA CORPORATIONInventors: Yoichi Nakagawa, Suguru Ozawa, Yuji Araki, Toshifumi Watanabe
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Publication number: 20230052383Abstract: A semiconductor memory device according to an embodiment includes a plurality of planes including a plurality of blocks each being a set of memory cells, and a sequencer configured to execute a first operation and a second operation shorter than the first operation. Upon receiving a first command set that instructs execution of the first operation, the sequencer is configured to execute the first operation. Upon receiving a second command set that instructs execution of the second operation while the first operation is being executed, the sequencer is configured to suspend the first operation and execute the second operation or execute the second operation in parallel with the first operation, based on an address of a block that is a target of the first operation and an address of a block that is a target of the second operation.Type: ApplicationFiled: October 26, 2022Publication date: February 16, 2023Applicant: Kioxia CorporationInventors: Akio SUGAHARA, Akihiro IMAMOTO, Toshifumi WATANABE, Mami KAKOI, Kohei MASUDA, Masahiro YOSHIHARA, Naofumi ABIKO
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Patent number: 11532363Abstract: A semiconductor memory device according to an embodiment includes a plurality of planes including a plurality of blocks each being a set of memory cells, and a sequencer configured to execute a first operation, and a second operation shorter than the first operation. Upon receiving a first command set that instructs execution of the first operation, the sequencer is configured to execute the first operation. Upon receiving a second command set that instructs execution of the second operation while the first operation is being executed, the sequencer is configured to suspend the first operation and execute the second operation or execute the second operation in parallel with the first operation, based on an address of a block that is a target of the first operation and an address of a block that is a target of the second operation.Type: GrantFiled: March 15, 2021Date of Patent: December 20, 2022Assignee: KIOXIA CORPORATIONInventors: Akio Sugahara, Akihiro Imamoto, Toshifumi Watanabe, Mami Kakoi, Kohei Masuda, Masahiro Yoshihara, Naofumi Abiko
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Publication number: 20220358991Abstract: A semiconductor memory device includes a memory cell, a word line connected to the memory cell, a source line connected to the memory cell, a bit line connected to the memory cell, and a control circuit configured to perform a read operation on the memory cell. During the read operation, the control circuit applies to the word line a first voltage, a second voltage greater than the first voltage after applying the first voltage, and a third voltage greater than the first voltage and smaller than the second voltage after applying the second voltage, and applies to the source line a fourth voltage according to a timing at which the second voltage is applied to the word line, a fifth voltage smaller than the fourth voltage after applying the fourth voltage, and a sixth voltage greater than the fifth voltage after applying the fifth voltage.Type: ApplicationFiled: July 26, 2022Publication date: November 10, 2022Inventors: Toshifumi WATANABE, Naofumi ABIKO
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Patent number: 11430502Abstract: A semiconductor memory device includes a memory cell, a word line connected to the memory cell, a source line connected to the memory cell, a bit line connected to the memory cell, and a control circuit configured to perform a read operation on the memory cell. During the read operation, the control circuit applies to the word line a first voltage, a second voltage greater than the first voltage after applying the first voltage, and a third voltage greater than the first voltage and smaller than the second voltage after applying the second voltage, and applies to the source line a fourth voltage according to a timing at which the second voltage is applied to the word line, a fifth voltage smaller than the fourth voltage after applying the fourth voltage, and a sixth voltage greater than the fifth voltage after applying the fifth voltage.Type: GrantFiled: April 5, 2021Date of Patent: August 30, 2022Assignee: KIOXIA CORPORATIONInventors: Toshifumi Watanabe, Naofumi Abiko
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Patent number: 11352274Abstract: A gas dissolution supply apparatus dissolves a gas supplied from a gas supply unit in a liquid supplied from a liquid supply unit to produce a gas dissolution in a gas dissolving unit, stores the gas dissolution produced in the gas dissolving unit in a gas dissolution tank, supplies the gas dissolution from the gas dissolution tank to a point of use, measures the flow rate of a part of the gas dissolution supplied to the point of use that is returned to the gas dissolving unit, and adjusts the flow rate of the liquid supplied from the liquid supply unit to the gas dissolving unit based on the result of the measurement.Type: GrantFiled: May 28, 2020Date of Patent: June 7, 2022Assignee: EBARA CORPORATIONInventors: Suguru Ozawa, Yuji Araki, Toshifumi Watanabe, Yoichi Nakagawa
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Publication number: 20220105478Abstract: A gas solution supply device 1 includes: a first gas-liquid separator 8 in which gas solution is stored; a second gas-liquid separator 16 provided at a stage subsequent to the first gas-liquid separator 8 and in which gas solution to be supplied to a use point is stored; an intermediate line 17 provided between the first gas-liquid separator 8 and the second gas-liquid separator 16; a pressure booster pump 18 provided on the intermediate line 17 and increases a pressure of gas solution being supplied from the first gas-liquid separator 8 to the second gas-liquid separator 16; a gas supply line 2 that supplies gas as a material of the gas solution; and a gas dissolving unit 20 provided on the intermediate line 17 and dissolves the gas supplied from the gas supply line 2 in the gas solution supplied from the first gas-liquid separator 8.Type: ApplicationFiled: September 29, 2021Publication date: April 7, 2022Inventors: Suguru OZAWA, Yuji ARAKI, Toshifumi WATANABE, Yoichi NAKAGAWA, Risa KIMURA, Tao XU
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Publication number: 20210245115Abstract: A gas solution manufacturing device 1 includes a gas supply line 2 configured to supply a gas as a raw material of a gas solution, a liquid supply line 3 configured to supply a liquid as a raw material of the gas solution, a gas solution production unit 4 configured to mix the gas and the liquid together to produce the gas solution, a gas-liquid separation unit 5 configured to perform gas-liquid separation of the produced gas solution into a supplied liquid to be supplied to a use point and a discharged gas to be discharged through an exhaust port, and a gas dissolving unit 6 provided in the liquid supply line 4 and configured to dissolve the discharged gas resulting from the gas-liquid separation in the liquid. The gas dissolving unit 6 is configured with a hollow fiber membrane configured with a gas permeable membrane.Type: ApplicationFiled: February 1, 2021Publication date: August 12, 2021Inventors: Suguru OZAWA, Yuji ARAKI, Yoichi NAKAGAWA, Toshifumi WATANABE
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Publication number: 20210225424Abstract: A semiconductor memory device includes a memory cell, a word line connected to the memory cell, a source line connected to the memory cell, a bit line connected to the memory cell, and a control circuit configured to perform a read operation on the memory cell. During the read operation, the control circuit applies to the word line a first voltage, a second voltage greater than the first voltage after applying the first voltage, and a third voltage greater than the first voltage and smaller than the second voltage after applying the second voltage, and applies to the source line a fourth voltage according to a timing at which the second voltage is applied to the word line, a fifth voltage smaller than the fourth voltage after applying the fourth voltage, and a sixth voltage greater than the fifth voltage after applying the fifth voltage.Type: ApplicationFiled: April 5, 2021Publication date: July 22, 2021Inventors: Toshifumi WATANABE, Naofumi ABIKO