Patents by Inventor Koji Katayama

Koji Katayama 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: 20240227119
    Abstract: Provided is a polishing pad having a high following performance even when a surface to be polished is a curved face. A polishing pad (1) in an embodiment of the present invention includes a polishing layer (2) having a polishing face (21) and a support layer (3) that is formed from a material softer than the polishing layer (2) and is fixed to a face (22) opposite to the polishing face (21) of the polishing layer (2). The support layer (3) has a hardness of not less than 30 and less than 70 in terms of F hardness.
    Type: Application
    Filed: February 25, 2022
    Publication date: July 11, 2024
    Applicant: FUJIMI INCORPORATED
    Inventors: Kyosuke Tenko, Koji Katayama, Daisuke Yasui, Hideharu Hase, Shota Hishida
  • Patent number: 12007348
    Abstract: A gas sensor driving method for a gas sensor that (i) includes: a first electrode including a first principal surface; a second electrode including a second principal surface; a metal-oxide layer interposed between the first principal surface and the second principal surface that face each other; and an insulating film covering the first electrode, the metal-oxide layer, and the second electrode, and exposing at least a part of a third principal surface of the second electrode, the third principal surface being disposed on an opposite side of the second principal surface, and (ii) detects hydrogen in accordance with a change in a resistance value of the metal-oxide layer. The gas sensor driving method includes repeatedly applying a positive voltage and a negative voltage across the first electrode and the second electrode.
    Type: Grant
    Filed: October 7, 2021
    Date of Patent: June 11, 2024
    Assignee: NUVOTON TECHNOLOGY CORPORATION JAPAN
    Inventors: Kazunari Homma, Koji Katayama, Shunsaku Muraoka, Ken Kawai
  • Publication number: 20240175837
    Abstract: A hydrogen sensor includes a first electrode that is a planar electrode; a second electrode that is a planar electrode facing the first electrode and includes an exposed portion to be exposed to a gas containing hydrogen; a metal oxide layer disposed between the two facing surfaces of the first electrode and the second electrode and having the resistance value that is changed by the exposed portion being exposed to the gas; a first terminal, a second terminal, and a heat dissipation portion spaced apart from each other; one or more first vias provided above the second electrode and electrically connected to the first terminal and the second electrode; one or more second vias provided above the second electrode and electrically connected to the second terminal and the second electrode; and one or more third vias above the second electrode and in contact with the heat dissipation portion.
    Type: Application
    Filed: January 10, 2024
    Publication date: May 30, 2024
    Inventors: Kazunari HOMMA, Satoru ITO, Koji KATAYAMA
  • Publication number: 20240131654
    Abstract: Provided is a polishing pad having a high following performance even when a surface to be polished is a curved face. A polishing pad (1) in an embodiment of the present invention includes a polishing layer (2) having a polishing face (21) and a support layer (3) that is formed from a material softer than the polishing layer (2) and is fixed to a face (22) opposite to the polishing face (21) of the polishing layer (2). The support layer (3) has a hardness of not less than 30 and less than 70 in terms of F hardness.
    Type: Application
    Filed: February 25, 2022
    Publication date: April 25, 2024
    Applicant: FUJIMI INCORPORATED
    Inventors: Kyosuke Tenko, Koji Katayama, Daisuke Yasui, Hideharu Hase, Shota Hishida
  • Publication number: 20240069468
    Abstract: With a mounting operation of a supply container, a supported portion 11b of a developer receiving portion 11 is supported by a receipt supporting portion 30c of a lifting portion 30. With further mounting operation, a shutter sliding portion 30b of the lifting portion 30 slides on a shutter inclined portion 4f of a shutter 4. The developer receiving portion 11 is displaced so as to bring a receiving opening into communication with a discharge opening by operating, using the shutter 4, the lifting portion 30 supporting the supported portion 11b of the developer receiving portion 11. By this, a load required for movement of the developer receiving portion 11 is reduced to achieve smooth mounting of the supply container.
    Type: Application
    Filed: November 8, 2023
    Publication date: February 29, 2024
    Inventors: Yohei Gamo, Tsukasa Mine, Akihito Kamura, Koji Katayama, Masato Yamaoka, Yusuke Oizumi, Manabu Jimba, Ayatomo Okino, Nobuyuki Yomoda, Keisuke Isobe
  • Patent number: 11852991
    Abstract: A developer supply container includes a developer accommodating portion accommodating developer, and a developer discharging portion in fluid communication with the developer accommodating portion. The developer accommodating portion is rotatable about a rotational axis and relative to the developer discharging portion, with the developer discharging portion being provided with a developer discharge opening at a bottommost side of the developer discharging portion and configured to permit discharging the developer to outside of the developer supply container. A lifter is linearly liftable relative to the developer discharging portion in a direction perpendicular to a horizontal plane that includes the rotational axis when the developer supply container is oriented with the developer discharge opening positioned at a bottom side of the developer discharging portion.
    Type: Grant
    Filed: October 25, 2022
    Date of Patent: December 26, 2023
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yohei Gamo, Tsukasa Mine, Akihito Kamura, Koji Katayama, Masato Yamaoka, Yusuke Oizumi, Manabu Jimba, Ayatomo Okino, Nobuyuki Yomoda, Keisuke Isobe
  • Publication number: 20230081445
    Abstract: A variable resistance nonvolatile storage device includes: a variable resistance element having a state reversibly changeable between a high resistance state and a low resistance state; and a current supply circuit that supplies the variable resistance element with a low-resistance changing current for changing the state from the high resistance state to the low resistance state. The low-resistance changing current has a waveform that includes a first period and a second period along a time axis, the second period being subsequent to the first period. The current supply circuit applies to the variable resistance element: a first current during the first period; and a second current during the second period, the second current being smaller than the first current. The first current is not zero at an end of the first period, and the second current is not zero at a start of the second period.
    Type: Application
    Filed: November 18, 2022
    Publication date: March 16, 2023
    Inventors: Ken KAWAI, Koji KATAYAMA
  • Patent number: 11599042
    Abstract: With a mounting operation of a supply container, a supported portion 11b of a developer receiving portion 11 is supported by a receipt supporting portion 30c of a lifting portion 30. With further mounting operation, a shutter sliding portion 30b of the lifting portion 30 slides on a shutter inclined portion 4f of a shutter 4. The developer receiving portion 11 is displaced so as to bring a receiving opening into communication with a discharge opening by operating, using the shutter 4, the lifting portion 30 supporting the supported portion 11b of the developer receiving portion 11. By this, a load required for movement of the developer receiving portion 11 is reduced to achieve smooth mounting of the supply container.
    Type: Grant
    Filed: October 24, 2022
    Date of Patent: March 7, 2023
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yohei Gamo, Tsukasa Mine, Akihito Kamura, Koji Katayama, Masato Yamaoka, Yusuke Oizumi, Manabu Jimba, Ayatomo Okino, Nobuyuki Yomoda, Keisuke Isobe
  • Publication number: 20230048946
    Abstract: With a mounting operation of a supply container, a supported portion 11b of a developer receiving portion 11 is supported by a receipt supporting portion 30c of a lifting portion 30. With further mounting operation, a shutter sliding portion 30b of the lifting portion 30 slides on a shutter inclined portion 4f of a shutter 4. The developer receiving portion 11 is displaced so as to bring a receiving opening into communication with a discharge opening by operating, using the shutter 4, the lifting portion 30 supporting the supported portion 11b of the developer receiving portion 11. By this, a load required for movement of the developer receiving portion 11 is reduced to achieve smooth mounting of the supply container.
    Type: Application
    Filed: October 24, 2022
    Publication date: February 16, 2023
    Inventors: Yohei Gamo, Tsukasa Mine, Akihito Kamura, Koji Katayama, Masato Yamaoka, Yusuke Oizumi, Manabu Jimba, Ayatomo Okino, Nobuyuki Yomoda, Keisuke Isobe
  • Publication number: 20230041483
    Abstract: With a mounting operation of a supply container, a supported portion 11b of a developer receiving portion 11 is supported by a receipt supporting portion 30c of a lifting portion 30. With further mounting operation, a shutter sliding portion 30b of the lifting portion 30 slides on a shutter inclined portion 4f of a shutter 4. The developer receiving portion 11 is displaced so as to bring a receiving opening into communication with a discharge opening by operating, using the shutter 4, the lifting portion 30 supporting the supported portion 11b of the developer receiving portion 11. By this, a load required for movement of the developer receiving portion 11 is reduced to achieve smooth mounting of the supply container.
    Type: Application
    Filed: October 25, 2022
    Publication date: February 9, 2023
    Inventors: Yohei Gamo, Tsukasa Mine, Akihito Kamura, Koji Katayama, Masato Yamaoka, Yusuke Oizumi, Manabu Jimba, Ayatomo Okino, Nobuyuki Yomoda, Keisuke Isobe
  • Publication number: 20230022428
    Abstract: A hydrogen sensor includes: a first electrode which is planar; a second electrode which is planar, faces the first electrode, and includes an exposed portion; a metal oxide layer which is sandwiched between a surface of the first electrode and a surface of the second electrode, and has a resistance that changes due to hydrogen; and two terminals, i.e., a first terminal and a second terminal, that are connected to the second electrode.
    Type: Application
    Filed: September 30, 2022
    Publication date: January 26, 2023
    Inventors: Kazunari HOMMA, Koji KATAYAMA, Ken KAWAI
  • Publication number: 20230019635
    Abstract: There are provided a developer accommodating portion for accommodating the developer, a discharge portion formed with a discharge opening for discharging the developer accommodated in the developer accommodating portion, and an engaging portion 30. The engaging portion 30 is engaged with an engaged portion 11b with a mounting operation of a developer supply container 1 to displace a developer receiving portion 11 in an upward direction U so that the receiving opening communicates with the discharge opening. The engaging portion 30 has a holding portion 31 which is provided rotatably about a rotation shaft 41 and is provided with holding portion 21 to be engaged with the engaged portion 11b to hold the engaged portion 11b. With the mounting operation, the engaging portion 30 rotates about the rotation shaft 41 so that the engaged portion 11b held by the holding portion 31 moves upward U.
    Type: Application
    Filed: September 15, 2022
    Publication date: January 19, 2023
    Inventors: Ayatomo Okino, Hiromasa Katayama, Nobuyuki Yomoda, Masato Yamaoka, Akihito Kamura, Koji Katayama, Tsukasa Mine, Katsuya Murakami, Keisuke Isobe, Shogo Yamasaki
  • Patent number: 11541737
    Abstract: Provided is a gas detection device that includes a gas sensor, a power supply circuit that applies voltage to the gas sensor, and a control circuit that determines whether a leak of gas is present. The power supply circuit includes a reset power source that generates a first voltage, and a detection power source that generates a detection voltage for measuring resistance of a metal-oxide layer of the gas sensor. When a value of a current flowing through the metal-oxide layer is a predetermined value ITH or greater, the reset power source applies the first voltage to the gas sensor to perform a reset of resetting the metal-oxide layer of the gas sensor to a high-resistance state, and the control circuit determines that a leak of gas is present, depending on a state in which the reset is performed after the reset is performed for the first time.
    Type: Grant
    Filed: December 18, 2017
    Date of Patent: January 3, 2023
    Assignee: NUVOTON TECHNOLOGY CORPORATION JAPAN
    Inventors: Shunsaku Muraoka, Kazunari Homma, Koji Katayama, Zhiqiang Wei
  • Patent number: 11536677
    Abstract: A gas detection device includes a gas sensor and a drive circuit. The drive circuit includes a measurement circuit, a power supply circuit, and a control circuit. The gas sensor includes a first electrode, a second electrode, a metal-oxide layer disposed between the first electrode and the second electrode, and an insulating film that covers the first electrode, the second electrode, and the metal-oxide layer, and has an opening that exposes part of a main surface of the second electrode. A resistance value of the metal-oxide layer decreases when gas containing hydrogen atoms contact the second electrode. When the resistance value of the metal-oxide layer falls outside a predetermined range, the drive circuit applies a predetermined voltage between the first electrode and the second electrode to restore the resistance value of the metal-oxide layer back into the predetermined range.
    Type: Grant
    Filed: December 18, 2017
    Date of Patent: December 27, 2022
    Assignee: NUVOTON TECHNOLOGY CORPORATION JAPAN
    Inventors: Ken Kawai, Koji Katayama, Shinichi Yoneda
  • Patent number: 11525765
    Abstract: The objective of the present invention is to provide a particle detection device and a particle detection method that can individually and continuously detect a wide range of particles. The objective is achieved by a particle detection device including: a particle separation channel through which particles are separated according to particle sizes in a perpendicular direction to the flow of fluid; and two or more particle recovery channels that are connected to and branched from the particle separation channel, in which each of the particle recovery channels includes a particle detection unit that includes an aperture and an electric detector.
    Type: Grant
    Filed: February 13, 2018
    Date of Patent: December 13, 2022
    Assignees: TOSOH CORPORATION, NATIONAL UNIVERSITY CORPORATION CHIBA UNIVERSITY
    Inventors: Kazuki Iijima, Toshinobu Toyoshima, Kotohiro Furukawa, Koji Katayama, Naotaka Jin, Minoru Seki
  • Patent number: 11498182
    Abstract: A disc-shaped polishing pad (1) is used for a polishing method of the present invention. The polishing pad (1) has a peripheral surface (111) on a polishing surface (10) side in an axial direction of the disc of a tapered surface whose diameter is reduced to the polishing surface (10). An angle formed by the peripheral surface (111) and the polishing surface (10) is 125° or more and less than 180°. The polishing pad (1) has a hardness immediately after a pressing surface is in close contact of 40 or more by a testing method specified in an appendix 2 of JIS K7312: 1996, “Spring Hardness Test Type C Testing Method”. A slurry containing abrasives is supplied to a polished surface larger than the polishing surface (10). The polishing surface (10) is pressed against the polished surface and the polishing pad (1) is moved to polish the polished surface.
    Type: Grant
    Filed: February 20, 2017
    Date of Patent: November 15, 2022
    Assignee: FUJIMI INCORPORATED
    Inventors: Toru Kamada, Koji Katayama, Hitoshi Morinaga, Takashi Horibe
  • Patent number: 11480913
    Abstract: There are provided a developer accommodating portion for accommodating the developer, a discharge portion formed with a discharge opening for discharging the developer accommodated in the developer accommodating portion, and an engaging portion 30. The engaging portion 30 is engaged with an engaged portion 11b with a mounting operation of a developer supply container 1 to displace a developer receiving portion 11 in an upward direction U so that the receiving opening communicates with the discharge opening. The engaging portion 30 has a holding portion 31 which is provided rotatably about a rotation shaft 41 and is provided with holding portion 21 to be engaged with the engaged portion 11b to hold the engaged portion 11b. With the mounting operation, the engaging portion 30 rotates about the rotation shaft 41 so that the engaged portion 11b held by the holding portion 31 moves upward U.
    Type: Grant
    Filed: November 5, 2020
    Date of Patent: October 25, 2022
    Assignee: Canon Kabushiki Kaisha
    Inventors: Ayatomo Okino, Hiromasa Katayama, Nobuyuki Yomoda, Masato Yamaoka, Akihito Kamura, Koji Katayama, Tsukasa Mine, Katsuya Murakami, Keisuke Isobe, Shogo Yamasaki
  • Publication number: 20220276584
    Abstract: With a mounting operation of a supply container, a supported portion 11b of a developer receiving portion 11 is supported by a receipt supporting portion 30c of a lifting portion 30. With further mounting operation, a shutter sliding portion 30b of the lifting portion 30 slides on a shutter inclined portion 4f of a shutter 4. The developer receiving portion 11 is displaced so as to bring a receiving opening into communication with a discharge opening by operating, using the shutter 4, the lifting portion 30 supporting the supported portion 11b of the developer receiving portion 11. By this, a load required for movement of the developer receiving portion 11 is reduced to achieve smooth mounting of the supply container.
    Type: Application
    Filed: May 17, 2022
    Publication date: September 1, 2022
    Inventors: Yohei Gamo, Tsukasa Mine, Akihito Kamura, Koji Katayama, Masato Yamaoka, Yusuke Oizumi, Manabu Jimba, Ayatomo Okino, Nobuyuki Yomoda, Keisuke Isobe
  • Publication number: 20220276583
    Abstract: With a mounting operation of a supply container, a supported portion 11b of a developer receiving portion 11 is supported by a receipt supporting portion 30c of a lifting portion 30. With further mounting operation, a shutter sliding portion 30b of the lifting portion 30 slides on a shutter inclined portion 4f of a shutter 4. The developer receiving portion 11 is displaced so as to bring a receiving opening into communication with a discharge opening by operating, using the shutter 4, the lifting portion 30 supporting the supported portion 11b of the developer receiving portion 11. By this, a load required for movement of the developer receiving portion 11 is reduced to achieve smooth mounting of the supply container.
    Type: Application
    Filed: May 17, 2022
    Publication date: September 1, 2022
    Inventors: Yohei Gamo, Tsukasa Mine, Akihito Kamura, Koji Katayama, Masato Yamaoka, Yusuke Oizumi, Manabu Jimba, Ayatomo Okino, Nobuyuki Yomoda, Keisuke Isobe
  • Publication number: 20220198251
    Abstract: A semiconductor device includes variable resistance elements on a semiconductor substrate. Each of the variable resistance elements includes a first electrode, a second electrode, and a variable resistance layer that is sandwiched between the first electrode and the second electrode and that stores a resistance value that is continuously variable. The variable resistance layer includes a filament whose shape differs according to a neural network weight, and stores, as an analog value, the resistance value that is variable.
    Type: Application
    Filed: March 10, 2022
    Publication date: June 23, 2022
    Inventors: Takumi MIKAWA, Koji KATAYAMA, Ryutaro YASUHARA