Patents by Inventor Yoshihiko Kamata
Yoshihiko Kamata 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: 11562791Abstract: Memory devices might include a first latch to store a first data bit; a second latch to store a second data bit; a data line selectively connected to the first latch, the second latch, and a string of series-connected memory cells; and a controller configured to bias the data line during a programing operation of a selected memory cell. The controller may with the first data bit equal to 0 and the second data bit equal to 0, bias the data line to a first voltage level; with the first data bit equal to 1 and the second data bit equal to 0, bias the data line to a second voltage level; with the first data bit equal to 0 and the second data bit equal to 1, bias the data line to a third voltage level; and with the first data bit equal to 1 and the second data bit equal to 1, bias the data line to a fourth voltage level.Type: GrantFiled: August 9, 2021Date of Patent: January 24, 2023Assignee: Micron Technology, Inc.Inventors: Hao T. Nguyen, Tomoko Ogura Iwasaki, Erwin E. Yu, Dheeraj Srinivasan, Sheyang Ning, Lawrence Celso Miranda, Aaron S. Yip, Yoshihiko Kamata
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Patent number: 11562799Abstract: Memory devices might include an array of memory cells including a plurality of strings of series-connected memory cells, a plurality of access lines, a common source, a plurality of data lines, a plurality of shield lines, and control logic. Each access line might be connected to a control gate of a respective memory cell of each string of series-connected memory cells. Each string of series-connected memory cells might be selectively connected between the common source and a respective data line. The plurality of shield lines might be interleaved with the plurality of data lines. The control logic might be configured to implement a program verify operation of respective memory cells coupled to a selected access line including sensing a voltage level on each data line to determine whether each respective memory cell coupled to the selected access line has been programmed to a target level for the respective memory cell.Type: GrantFiled: September 1, 2021Date of Patent: January 24, 2023Assignee: Micron Technology, Inc.Inventor: Yoshihiko Kamata
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Publication number: 20220383960Abstract: Methods of forming integrated circuit structures for a capacitive sense NAND memory include forming a first semiconductor overlying a dielectric, forming a second semiconductor to be in contact with a first end of the first semiconductor, forming a third semiconductor to be in contact with a second end of the first semiconductor opposite the first end of the first semiconductor, forming a vertical channel material structure overlying the first semiconductor and having a channel material capacitively coupled to the first semiconductor, and forming a plurality of series-connected field-effect transistors adjacent the vertical channel material structure.Type: ApplicationFiled: July 29, 2022Publication date: December 1, 2022Applicant: MICRON TECHNOLOGY, INC.Inventors: Yoshiaki Fukuzumi, Jun Fujiki, Shuji Tanaka, Masashi Yoshida, Masanobu Saito, Yoshihiko Kamata
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Publication number: 20220351785Abstract: Memory might include a plurality of series-connected non-volatile memory cells, a plurality of series-connected first field-effect transistors connected in series with the plurality of series-connected non-volatile memory cells, and a second field-effect transistor, wherein the channel of the second field-effect transistor is capacitively coupled to channels of the plurality of series-connected first field-effect transistors.Type: ApplicationFiled: July 11, 2022Publication date: November 3, 2022Applicant: MICRON TECHNOLOGY, INC.Inventors: Yoshiaki Fukuzumi, Jun Fujiki, Shuji Tanaka, Masashi Yoshida, Masanobu Saito, Yoshihiko Kamata
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Publication number: 20220336490Abstract: A microelectronic device comprises first digit lines, second digit lines, and multiplexer devices. The first digit lines are coupled to strings of memory cells. The second digit lines are coupled to additional strings of memory cells. The second digit lines are offset from the first digit lines in a first horizontal direction and are substantially aligned with the first digit lines in a second horizontal direction orthogonal to the first horizontal direction. The multiplexer devices are horizontally interposed between the first digit lines and the second digit lines in the first horizontal direction. The multiplexer devices are in electrical communication with the first digit lines, the second digit lines, and page buffer devices. Additional microelectronic devices, memory devices, and electronic systems are also described.Type: ApplicationFiled: July 6, 2022Publication date: October 20, 2022Inventors: Koichi Kawai, Yoshihiko Kamata, Yoshiaki Fukuzumi, Tamotsu Murakoshi
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Publication number: 20220310180Abstract: According to one embodiment, a semiconductor memory device includes first and second memory cells, a first word line, first and second sense amplifiers, first and second bit lines, a controller. The first and second sense amplifiers each include first and second transistors. The first bit line is connected between the first memory cell and the first transistor. The second bit line is connected between the second memory cell and the second transistor. In the read operation, the controller is configured to apply a kick voltage to the first word line before applying the read voltage to the first word line, and to apply a first voltage to a gate of the first transistor and a second voltage to a gate of the second transistor while applying the kick voltage to the first word line.Type: ApplicationFiled: June 15, 2022Publication date: September 29, 2022Applicant: KIOXIA CORPORATIONInventors: Yoshihiko KAMATA, Naofumi ABIKO
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Publication number: 20220301634Abstract: Memory devices might include a capacitor, a first capacitance element, a first transistor, and control logic. The first transistor might be connected between the capacitor and the first capacitance element. The control logic might be connected to a control gate of the first transistor. The control logic might be configured to activate the first transistor to precharge the capacitor and the first capacitance element during a read operation of the memory device. The first capacitance element might be a wire capacitance of a first signal line.Type: ApplicationFiled: March 17, 2021Publication date: September 22, 2022Applicant: MICRON TECHNOLOGY, INC.Inventor: Yoshihiko Kamata
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Patent number: 11437106Abstract: An array of memory cells might include a first data line, a second data line, a source, a capacitance selectively connected to the first data line, a string of series-connected non-volatile memory cells between the first data line and the capacitance, and a pass gate selectively connected between the second data line and the source, wherein an electrode of the capacitance is capacitively coupled to a channel of the pass gate.Type: GrantFiled: December 4, 2020Date of Patent: September 6, 2022Assignee: Micron Technology, Inc.Inventors: Yoshiaki Fukuzumi, Jun Fujiki, Shuji Tanaka, Masashi Yoshida, Masanobu Saito, Yoshihiko Kamata
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Patent number: 11393545Abstract: According to one embodiment, a semiconductor memory device includes first and second memory cells, a first word line, first and second sense amplifiers, first and second bit lines, a controller. The first and second sense amplifiers each include first and second transistors. The first bit line is connected between the first memory cell and the first transistor. The second bit line is connected between the second memory cell and the second transistor. In the read operation, the controller is configured to apply a kick voltage to the first word line before applying the read voltage to the first word line, and to apply a first voltage to a gate of the first transistor and a second voltage to a gate of the second transistor while applying the kick voltage to the first word line.Type: GrantFiled: April 14, 2021Date of Patent: July 19, 2022Assignee: KIOXIA CORPORATIONInventors: Yoshihiko Kamata, Naofumi Abiko
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Patent number: 11393845Abstract: A microelectronic device comprises first digit lines, second digit lines, and multiplexer devices. The first digit lines are coupled to strings of memory cells. The second digit lines are coupled to additional strings of memory cells. The second digit lines are offset from the first digit lines in a first horizontal direction and are substantially aligned with the first digit lines in a second horizontal direction orthogonal to the first horizontal direction. The multiplexer devices are horizontally interposed between the first digit lines and the second digit lines in the first horizontal direction. The multiplexer devices are in electrical communication with the first digit lines, the second digit lines, and page buffer devices. Additional microelectronic devices, memory devices, and electronic systems are also described.Type: GrantFiled: August 28, 2020Date of Patent: July 19, 2022Assignee: Micron Technology, Inc.Inventors: Koichi Kawai, Yoshihiko Kamata, Yoshiaki Fukuzumi, Tamotsu Murakoshi
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Patent number: 11386966Abstract: Memory might include a non-volatile memory cell, a capacitance selectively connected to the non-volatile memory cell, a field-effect transistor having a channel capacitively coupled to an electrode of the capacitance, and a controller for access of the non-volatile memory cell configured to cause the memory to increase a voltage level of the electrode of the capacitance, selectively discharge the voltage level of the electrode of the capacitance through the non-volatile memory cell responsive to a data state stored in the non-volatile memory cell, and determine whether the field-effect transistor is activated in response to a remaining voltage level of the electrode of the capacitance.Type: GrantFiled: December 4, 2020Date of Patent: July 12, 2022Assignee: Micron Technology, Inc.Inventors: Yoshiaki Fukuzumi, Jun Fujiki, Shuji Tanaka, Masashi Yoshida, Masanobu Saito, Yoshihiko Kamata
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Publication number: 20220199176Abstract: Memory devices might include an array of memory cells including a plurality of strings of series-connected memory cells, a plurality of access lines, a common source, a plurality of data lines, a plurality of shield lines, and control logic. Each access line might be connected to a control gate of a respective memory cell of each string of series-connected memory cells. Each string of series-connected memory cells might be selectively connected between the common source and a respective data line. The plurality of shield lines might be interleaved with the plurality of data lines. The control logic might be configured to implement a program verify operation of respective memory cells coupled to a selected access line including sensing a voltage level on each data line to determine whether each respective memory cell coupled to the selected access line has been programmed to a target level for the respective memory cell.Type: ApplicationFiled: September 1, 2021Publication date: June 23, 2022Applicant: MICRON TECHNOLOGY, INC.Inventor: Yoshihiko Kamata
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Publication number: 20220180938Abstract: Arrays of memory cells might include a data line, a source, a plurality of pass gates connected in series between the data line and the source, a plurality of unit column structures each having a respective plurality of series-connected non-volatile memory cells connected in series with a respective plurality of series-connected field-effect transistors, wherein a channel of each non-volatile memory cell of its respective plurality of series-connected non-volatile memory cells and a channel of each field-effect transistor of its respective plurality of series-connected field-effect transistors are selectively connected to one another, and a plurality of backside gate lines each connected to the second control gate of a respective pass gate of the plurality of pass gates, wherein, for each unit column structure of the plurality of unit column structures, the channel of a particular field-effect transistor of its respective plurality of field-effect transistors is capacitively coupled to the first channel of aType: ApplicationFiled: December 4, 2020Publication date: June 9, 2022Applicant: MICRON TECHNOLOGY, INC.Inventors: Yoshiaki Fukuzumi, Jun Fujiki, Shuji Tanaka, Masashi Yoshida, Masanobu Saito, Yoshihiko Kamata
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Publication number: 20220181346Abstract: Arrays of memory cells might include a first upper data line, a second upper data line, a lower data line, a first pass gate selectively connected to the lower data line, a second pass gate connected to the first pass gate and selectively connected to the lower data line, a third pass gate selectively connected to the lower data line, a fourth pass gate connected to the third pass gate and selectively connected to the lower data line, unit column structures selectively connected to a respective one of the upper data lines and capacitively coupled to a first channel of a respective one of the pass gates, and control lines capacitively coupled to a second channel of a respective one of the pass gates.Type: ApplicationFiled: December 21, 2021Publication date: June 9, 2022Applicant: MICRON TECHNOLOGY, INC.Inventors: Yoshiaki Fukuzumi, Jun Fujiki, Shuji Tanaka, Masashi Yoshida, Masanobu Saito, Yoshihiko Kamata
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Publication number: 20220180937Abstract: An array of memory cells might include a first data line, a second data line, a source, a capacitance selectively connected to the first data line, a string of series-connected non-volatile memory cells between the first data line and the capacitance, and a pass gate selectively connected between the second data line and the source, wherein an electrode of the capacitance is capacitively coupled to a channel of the pass gate.Type: ApplicationFiled: December 4, 2020Publication date: June 9, 2022Applicant: MICRON TECHNOLOGY, INC.Inventors: Yoshiaki Fukuzumi, Jun Fujiki, Shuji Tanaka, Masashi Yoshida, Masanobu Saito, Yoshihiko Kamata
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Publication number: 20220180939Abstract: Memory might include a non-volatile memory cell, a capacitance selectively connected to the non-volatile memory cell, a field-effect transistor having a channel capacitively coupled to an electrode of the capacitance, and a controller for access of the non-volatile memory cell configured to cause the memory to increase a voltage level of the electrode of the capacitance, selectively discharge the voltage level of the electrode of the capacitance through the non-volatile memory cell responsive to a data state stored in the non-volatile memory cell, and determine whether the field-effect transistor is activated in response to a remaining voltage level of the electrode of the capacitance.Type: ApplicationFiled: December 4, 2020Publication date: June 9, 2022Applicant: MICRON TECHNOLOGY, INC.Inventors: Yoshiaki Fukuzumi, Jun Fujiki, Shuji Tanaka, Masashi Yoshida, Masanobu Saito, Yoshihiko Kamata
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Publication number: 20220181254Abstract: Some embodiments include an assembly having channel-material-structures, and having memory cells along the channel-material-structures. The memory cells include charge-storage-material. Linear-conductive-structures are vertically offset from the channel-material-structures and are electrically coupled with the channel-material-structures. Intervening regions are between the linear-conductive-structures. Conductive-shield-structures are within the intervening regions. The conductive-shield-structures are electrically coupled with a reference-voltage-source.Type: ApplicationFiled: February 25, 2022Publication date: June 9, 2022Applicant: Micron Technology, Inc.Inventors: Naveen Kaushik, Yoshihiko Kamata, Richard J. Hill, Kyle A. Ritter, Tomoko Ogura Iwasaki, Haitao Liu
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Publication number: 20220157380Abstract: A semiconductor storage device includes a first memory cell electrically connected to a first bit line and a first word line, a second memory cell electrically connected to a second bit line and the first word line, and a first circuit configured to supply voltages to the first word line. During a reading operation to read a page of memory cells including the first memory cell and the second memory cell, the first circuit supplies a first voltage to the first word line while the first memory cell is selected as a read target during a first time period, and supplies a second voltage greater than the first voltage to the first word line while the second memory cell is selected as a read target during a second time period that is different from the first time period, and directly thereafter, supplies the first voltage to the first word line.Type: ApplicationFiled: February 2, 2022Publication date: May 19, 2022Inventors: Mai Shimizu, Koji Kato, Yoshihiko Kamata, Mario Sako
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Patent number: 11302628Abstract: Some embodiments include an assembly having channel-material-structures, and having memory cells along the channel-material-structures. The memory cells include charge-storage-material. Linear-conductive-structures are vertically offset from the channel-material-structures and are electrically coupled with the channel-material-structures. Intervening regions are between the linear-conductive-structures. Conductive-shield-structures are within the intervening regions. The conductive-shield-structures are electrically coupled with a reference-voltage-source.Type: GrantFiled: July 9, 2020Date of Patent: April 12, 2022Assignee: Micron Technology, Inc.Inventors: Naveen Kaushik, Yoshihiko Kamata, Richard J. Hill, Kyle A. Ritter, Tomoko Ogura Iwasaki, Haitao Liu
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Patent number: 11276466Abstract: A semiconductor storage device includes a first memory cell electrically connected to a first bit line and a first word line, a second memory cell electrically connected to a second bit line and the first word line, and a first circuit configured to supply voltages to the first word line. During a reading operation to read a page of memory cells including the first memory cell and the second memory cell, the first circuit supplies a first voltage to the first word line while the first memory cell is selected as a read target during a first time period, and supplies a second voltage greater than the first voltage to the first word line while the second memory cell is selected as a read target during a second time period that is different from the first time period, and directly thereafter, supplies the first voltage to the first word line.Type: GrantFiled: November 19, 2020Date of Patent: March 15, 2022Assignee: KIOXIA CORPORATIONInventors: Mai Shimizu, Koji Kato, Yoshihiko Kamata, Mario Sako