Patents by Inventor Masaru Koyanagi

Masaru Koyanagi 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: 20190295987
    Abstract: A semiconductor device includes a base member, a stacked body on the base member, a first conductor on the stacked body, a second conductor on a top surface of the base member, and a connection conductor connecting the first conductor and the second conductor. The stacked body includes semiconductor chips stacked and a shared terminal connected to the plurality of semiconductor chips. The plurality of semiconductor chips each includes a functional element on a front surface side thereof and a through electrode extending from a back surface to the front surface side. The shared terminal has a top end positioned at a top surface of the stacked body and a bottom end positioned at a bottom surface of the stacked body. The first conductor is connected to the top end of the shared terminal, and the second conductor is electrically connected to the bottom end of the shared terminal.
    Type: Application
    Filed: September 4, 2018
    Publication date: September 26, 2019
    Applicant: TOSHIBA MEMORY CORPORATION
    Inventors: Satoshi Tsukiyama, Masaru Koyanagi, Mikihiko Ito, Kazushige Kawasaki
  • Publication number: 20190296724
    Abstract: A correction circuit includes a first detection unit, a second detection unit, a delay unit, and a waveform shaping unit. The first detection unit is configured to measure a first period of a high level of a first clock. The second detection unit is configured to measure a second period of a high level of a second clock that is complementary to the first clock. The delay unit is configured to generate a first delay clock and a second delay clock according to a difference between the first period and the second period. The waveform shaping unit is configured to generate a third clock having a logic level which is switched based on an edge of the first delay clock and an edge of the second delay clock.
    Type: Application
    Filed: September 2, 2018
    Publication date: September 26, 2019
    Inventors: Yasuhiro HIRASHIMA, Masaru KOYANAGI
  • Publication number: 20190295988
    Abstract: A semiconductor device includes a base member and semiconductor chips stacked on the base member. The semiconductor chips include a first semiconductor chip and a second semiconductor chip adjacent to the first semiconductor chip. The first semiconductor chip includes a semiconductor substrate, a functional layer and through electrodes. The through electrodes extend from the back surface to the front surface of the semiconductor substrate, and are electrically connected to the functional layer on the front surface. The second semiconductor chip is electrically connected to the first semiconductor chip through connection members connected to the through electrodes. The functional layer includes first and second contact pads. The second contact pad is positioned at a level between the semiconductor substrate and the first contact pad. The through electrodes include a first through electrode connected to the first contact pad and a second through electrode connected to the second contact pad.
    Type: Application
    Filed: September 4, 2018
    Publication date: September 26, 2019
    Applicant: TOSHIBA MEMORY CORPORATION
    Inventors: Satoshi TSUKIYAMA, Masaru KOYANAGI, Mikihiko ITO, Kazushige KAWASAKI
  • Publication number: 20190295661
    Abstract: A semiconductor device comprises an input circuit that includes a first comparator configured to output a first output signal and a second output signal having a phase opposite to that of the first output signal, based on a comparison result of a first input signal and a second input signal which is a complementary signal of the first input signal. A duty ratio of the first output signal and a duty ratio of the second output signal are different from a duty ratio of the first input signal and a duty ratio of the second input signal, respectively.
    Type: Application
    Filed: September 2, 2018
    Publication date: September 26, 2019
    Inventors: Yasuhiro HIRASHIMA, Masaru KOYANAGI, Mikihiko ITO, Kei SHIRAISHI, Fumiya WATANABE
  • Patent number: 10360982
    Abstract: The present embodiment discloses a semiconductor memory device which includes a memory cell array, a signal pad, a first voltage pad, a first regulation circuit and a first operation circuit. The signal pad supplies an output signal associated with the memory cell array. The first voltage pad receives a first voltage. The first regulation circuit regulates a signal output from the signal pad. The first operation circuit operates the first regulation circuit. The first regulation circuit and the first operation circuit are provided between the signal pad and the first voltage pad.
    Type: Grant
    Filed: September 12, 2017
    Date of Patent: July 23, 2019
    Assignee: TOSHIBA MEMORY CORPORATION
    Inventors: Yasuhiro Suematsu, Masaru Koyanagi, Satoshi Inoue, Kenro Kubota
  • Patent number: 10359961
    Abstract: According to one embodiment, there is provided a storage device including a control chip and a plurality of memory chips. The control chip has an input buffer common to the control chip and the plurality of memory chips and electrically connected to an external terminal. A first transmission path going through the input buffer and a second transmission path not going through the input buffer are provided between the external terminal and the plurality of memory chips. In a first mode, the control chip enables the input buffer so as to activate the first transmission path and, in a second mode, disables the input buffer so as to activate the second transmission path.
    Type: Grant
    Filed: September 12, 2014
    Date of Patent: July 23, 2019
    Assignee: TOSHIBA MEMORY CORPORATION
    Inventors: Mikihiko Ito, Masaru Koyanagi, Shintaro Hayashi
  • Publication number: 20190206495
    Abstract: According to one embodiment, a memory device includes: a first chip including a first circuit, first and second terminal; a second chip including a second circuit and a third terminal; and an interface chip including first and second voltage generators. The first chip is between the second chip and the interface chip. The first terminal is connected between the first circuit and the first voltage generator. A third end of the second terminal is connected to the third terminal and a fourth end of the second terminal is connected to the second voltage generator. A fifth end of the third terminal is connected to the second circuit and a sixth end of the third terminal is connected to the second voltage generator via the second terminal. The third end overlaps with the sixth end, without overlapping with the fourth end.
    Type: Application
    Filed: March 11, 2019
    Publication date: July 4, 2019
    Applicant: Toshiba Memory Corporation
    Inventors: Mikihiko ITO, Masaru KOYANAGI, Masafumi NAKATANI, Masahiro YOSHIHARA, Shinya OKUNO, Shigeki NAGASAKA
  • Publication number: 20190206845
    Abstract: According to one embodiment, a memory device includes: a first chip including a first circuit, first and second terminals; a second chip including a second circuit and a third terminal; and an interface chip including first and second voltage generators. The first chip is between the second chip and the interface chip. The first terminal is connected between the first circuit and the first voltage generator. A third end of the second terminal is connected to the third terminal and a fourth end of the second terminal is connected to the second voltage generator. A fifth end of the third terminal is connected to the second circuit and a sixth end of the third terminal is connected to the second voltage generator via the second terminal. The third end overlaps with the sixth end, without overlapping with the fourth end.
    Type: Application
    Filed: March 11, 2019
    Publication date: July 4, 2019
    Applicant: Toshiba Memory Corporation
    Inventors: Mikihiko ITO, Masaru Koyanagi, Masafumi Nakatani, Shinya Okuno, Shigeki Nagasaka, Masahiro Yoshihara, Akira Umezawa, Satoshi Tsukiyama, Kazushige Kawasaki
  • Publication number: 20190096854
    Abstract: A semiconductor device includes first, second and third stacked chips with a first, second and third substrate, respectively, at least three first, second and third logical circuits, respectively, and at least two first, second and third vias, respectively, and a fourth chip stacked on the third chip having a fourth substrate, and at least three fourth logical circuits. First and second ones of the first to third logical circuits of the first to fourth chips are each configured to perform a first and second logical operation, respectively, on a first and second address input signal, respectively, received at the respective chip to thereby output a first and second address output signal, respectively. Third ones are each configured to activate the respective chip based on at least the second address output signal transmitted within the respective chip.
    Type: Application
    Filed: November 8, 2018
    Publication date: March 28, 2019
    Applicant: TOSHIBA MEMORY CORPORATION
    Inventor: Masaru KOYANAGI
  • Publication number: 20190080769
    Abstract: A semiconductor memory device includes a first transistor including a first end connected to a first pad and a second end connected to a first node, a second transistor including a first end connected to a second pad and a second end connected to the first node, a third transistor including a first end connected to the second pad, a second end connected to the first node, and a gate connected to a second node and having a size different from that of the second transistor, a fourth transistor including a first end connected to the first pad, a second end connected to the second node, and a gate connected to the first node, and a fifth transistor including a first end connected to the second pad, a second end connected to the second node, and a gate connected to the first node.
    Type: Application
    Filed: March 5, 2018
    Publication date: March 14, 2019
    Inventors: Kei SHIRAISHI, Masaru KOYANAGI, Mikihiko ITO, Yasuhiro HIRASHIMA
  • Patent number: 10186487
    Abstract: A semiconductor device includes a first chip having a through via, a second chip having a first terminal that is electrically connected to the through via, and a substrate having a second terminal disposed on a first surface thereof and electrically connected to the first terminal. When viewed along a straight line that intersects a center axis that is perpendicular to the first surface and intersects a center point of the substrate, the first terminal is disposed further towards the center axis than the second terminal and the through via is disposed further towards the center axis than the first terminal.
    Type: Grant
    Filed: August 28, 2017
    Date of Patent: January 22, 2019
    Assignee: TOSHIBA MEMORY CORPORATION
    Inventors: Kazushige Kawasaki, Mikihiko Ito, Masaru Koyanagi
  • Publication number: 20190007045
    Abstract: A semiconductor device includes a latch circuit including a first inverter configured to output a first signal based on an input signal, a second inverter configured to output a first clock signal based on a first strobe signal, a third inverter configured to output a second clock signal based on a second strobe signal, a first clock generation circuit configured to generate a third clock signal having transitions that are delayed with respect to the first clock signal, a second clock generation circuit configured to generate a fourth clock signal having transitions that are delayed with respect to the second clock signal, a fourth inverter configured to output an inversion signal of the first signal in accordance with the third and fourth clock signals, and a data latch circuit configured to latch an output signal of the fourth inverter.
    Type: Application
    Filed: February 27, 2018
    Publication date: January 3, 2019
    Inventors: Yasuhiro HIRASHIMA, Masaru KOYANAGI, Yutaka TAKAYAMA
  • Patent number: 10157894
    Abstract: A semiconductor device includes a first chip having a first via and a second via through the first chip; and a second chip provided on the first chip and having a third via and a fourth via through the second chip. The first chip includes: a first logical operation circuit configured to perform a first logical operation (NOT) on a first address input signal to output a first address output signal to the second chip through the first via; a second logical operation circuit connected to the first logical operation circuit, the second logical operation circuit being configured to perform a second logical operation (XOR) on a second address input signal and the first address output signal to output a second address output signal to the second chip through the second via; and a first activation circuit connected to the second logical operation circuit, the first activation circuit being configured to activate the first chip based on at least the second address output signal.
    Type: Grant
    Filed: November 21, 2017
    Date of Patent: December 18, 2018
    Assignee: TOSHIBA MEMORY CORPORATION
    Inventor: Masaru Koyanagi
  • Patent number: 10089257
    Abstract: According to one embodiment, a semiconductor storage device includes a plurality of semiconductor chips and a control unit. The plurality of semiconductor chips is configured to connect to a signal transmission path and is controlled individually by individual chip enable signals. The plurality of semiconductor chips each includes a termination circuit connected to the signal transmission path. When one of the semiconductor chips is selected to input or output data, the control unit activates the termination circuit provided in the semiconductor chip that is not selected based on a first instruction signal and the chip enable signal.
    Type: Grant
    Filed: April 23, 2018
    Date of Patent: October 2, 2018
    Assignee: TOSHIBA MEMORY CORPORATION
    Inventors: Yoshikazu Takeyama, Masaru Koyanagi, Akio Sugahara
  • Publication number: 20180277484
    Abstract: A semiconductor device includes a first chip having a through via, a second chip having a first terminal that is electrically connected to the through via, and a substrate having a second terminal disposed on a first surface thereof and electrically connected to the first terminal. When viewed along a straight line that intersects a center axis that is perpendicular to the first surface and intersects a center point of the substrate, the first terminal is disposed further towards the center axis than the second terminal and the through via is disposed further towards the center axis than the first terminal.
    Type: Application
    Filed: August 28, 2017
    Publication date: September 27, 2018
    Inventors: Kazushige KAWASAKI, Mikihiko ITO, Masaru KOYANAGI
  • Publication number: 20180277219
    Abstract: The present embodiment discloses a semiconductor memory device which includes a memory cell array, a signal pad, a first voltage pad, a first regulation circuit and a first operation circuit. The signal pad supplies an output signal associated with the memory cell array. The first voltage pad receives a first voltage. The first regulation circuit regulates a signal output from the signal pad. The first operation circuit operates the first regulation circuit. The first regulation circuit and the first operation circuit are provided between the signal pad and the first voltage pad.
    Type: Application
    Filed: September 12, 2017
    Publication date: September 27, 2018
    Applicant: TOSHIBA MEMORY CORPORATION
    Inventors: Yasuhiro SUEMATSU, Masaru KOYANAGI, Satoshi INOUE, Kenro KUBOTA
  • Publication number: 20180239721
    Abstract: According to one embodiment, a semiconductor storage device includes a plurality of semiconductor chips and a control unit. The plurality of semiconductor chips is configured to connect to a signal transmission path and is controlled individually by individual chip enable signals. The plurality of semiconductor chips each includes a termination circuit connected to the signal transmission path. When one of the semiconductor chips is selected to input or output data, the control unit activates the termination circuit provided in the semiconductor chip that is not selected based on a first instruction signal and the chip enable signal.
    Type: Application
    Filed: April 23, 2018
    Publication date: August 23, 2018
    Applicant: Toshiba Memory Corporation
    Inventors: Yoshikazu TAKEYAMA, Masaru KOYANAGI, Akio SUGAHARA
  • Publication number: 20180233205
    Abstract: According to an embodiment, a semiconductor storage device includes a first chip including a power supply protection circuit. The power supply protection circuit including: a resistor including a first end connected to the second pad; a first capacitor including a first end connected to a second end of the resistor; a first transistor including a first end connected to the second pad, a second end connected to a node with a signal of a value based on a voltage of the first end of the first capacitor, and a gate connected to the first pad; a first inverter including an input terminal connected to the second end of the first transistor; and a second transistor including a gate connected to an output terminal of the first inverter.
    Type: Application
    Filed: September 11, 2017
    Publication date: August 16, 2018
    Applicant: TOSHIBA MEMORY CORPORATION
    Inventors: Maya INAGAKI, Masaru KOYANAGI
  • Patent number: 9977752
    Abstract: According to one embodiment, a semiconductor storage device includes a plurality of semiconductor chips and a control unit. The plurality of semiconductor chips is configured to connect to a signal transmission path and is controlled individually by individual chip enable signals. The plurality of semiconductor chips each includes a termination circuit connected to the signal transmission path. When one of the semiconductor chips is selected to input or output data, the control unit activates the termination circuit provided in the semiconductor chip that is not selected based on a first instruction signal and the chip enable signal.
    Type: Grant
    Filed: April 18, 2017
    Date of Patent: May 22, 2018
    Assignee: TOSHIBA MEMORY CORPORATION
    Inventors: Yoshikazu Takeyama, Masaru Koyanagi, Akio Sugahara
  • Patent number: RE47355
    Abstract: A non-volatile semiconductor storage device includes: a memory cell array having memory cells arranged therein, the memory cells storing data in a non-volatile manner; and a plurality of transfer transistors transferring a voltage to the memory cells, the voltage to be supplied for data read, write and erase operations with respect to the memory cells. Each of the transfer transistors includes: a gate electrode formed on a semiconductor substrate via a gate insulation film; and diffusion layers formed to sandwich the gate electrode therebetween and functioning as drain/source layers. Upper layer wirings are provided above the diffusion layers and provided with a predetermined voltage to prevent depletion of the diffusion layers at least when the transfer transistors become conductive.
    Type: Grant
    Filed: July 13, 2017
    Date of Patent: April 16, 2019
    Assignee: TOSHIBA MEMORY CORPORATION
    Inventors: Dai Nakamura, Hiroyuki Kutsukake, Kenji Gomikawa, Takeshi Shimane, Mitsuhiro Noguchi, Koji Hosono, Masaru Koyanagi, Takashi Aoi