Patents by Inventor Toyohiro Chikyo

Toyohiro Chikyo 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).

  • Patent number: 11856664
    Abstract: The present invention is to provide a prevention method and a prevention system for preventing dew condensation and light scattering due to the dew condensation. According to one embodiment of the present invention, a fine liquid droplet capable of causing dew condensation is detected by a detection means for detecting a fine liquid droplet, and then the fine liquid droplet is removed on the basis of the detection. The detection means comprises a first thin wire made of a first metal, and a second thin wire made of a second metal or a semiconductor, the second metal is different from the first metal, the first thin wire and the second thin wire are disposed in juxtaposition with each other on an insulating substrate, and a spacing between the first thin wire and the second thin wire is in a range of 20 nm or more and 10000 nm or less.
    Type: Grant
    Filed: February 2, 2018
    Date of Patent: December 26, 2023
    Assignee: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Jin Kawakita, Toyohiro Chikyo
  • Patent number: 11486843
    Abstract: The present invention is to provide a small-sized dryness/wetness responsive sensor that detects a galvanic current with a high sensitivity as a principle of operation. According to one embodiment of the present invention, a dryness/wetness responsive sensor comprises a thin wire made of a first metal and a thin wire made of a second metal, the second metal is different from the first metal, the thin wire of the first metal and the thin wire of the second metal are disposed in juxtaposition with each other on an insulating substrate, and a surface state of a part between the thin wire of the first metal and the thin wire of the second metal is hydrophilic or hydrophobic.
    Type: Grant
    Filed: August 23, 2018
    Date of Patent: November 1, 2022
    Assignee: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Jin Kawakita, Akihiko Ohi, Tomoko Ohki, Naoki Ikeda, Toshihide Nabatame, Toyohiro Chikyo
  • Patent number: 11454603
    Abstract: The purpose of the present invention is to realize a dew point measurement in which the generation of dew condensation is directly detected and the detection can be performed without using any optical system. In particular, the purpose of the present invention is to realize a dew point measuring device that is compact and has a high sensitivity. According to one embodiment of the present invention, a sudden change in current values before and after the dew point is detected by detecting the dew condensation to detect a galvanic current that flows due to a water droplet attached onto a surface of an insulating substrate on which thin wires of dissimilar metals are juxtaposed, and by controlling the temperature on the surface of the substrate. In this way, the dew point measurement in which the dew point can be directly measured and a measurement with simple configuration and high accuracy can be performed can be realized.
    Type: Grant
    Filed: June 6, 2017
    Date of Patent: September 27, 2022
    Assignee: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Jin Kawakita, Toyohiro Chikyo
  • Patent number: 11163829
    Abstract: The present invention searches for, in order of priority, a combination of material property parameters having a significant relationship, from among arbitrary combinations of multiple material property parameters.
    Type: Grant
    Filed: February 7, 2018
    Date of Patent: November 2, 2021
    Assignee: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Michiko Yoshitake, Shinjiro Yagyu, Toyohiro Chikyo, Isao Kuwajima
  • Patent number: 11138772
    Abstract: Provided are a search system and a search method capable of searching an unknown combination of material property parameters having a significant relationship based on already known relationships from among multiple arbitrary combinations of material property parameters. The search system includes a database, a graph generator, and a graph searcher, and is configured as follows: the database stores the plurality of pairs of material property parameters having mutual relationships, and the graph generator generates a graph in which material property parameters stored in the database are nodes, and an inter-node corresponding to the pairs of material property parameters stored to have mutual relationships is an edge. The graph searcher searches the graph generated by the graph generator based on a given search condition and outputs a search result.
    Type: Grant
    Filed: December 9, 2016
    Date of Patent: October 5, 2021
    Assignee: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Michiko Yoshitake, Shinjiro Yagyu, Toyohiro Chikyo, Isao Kuwajima
  • Publication number: 20200387547
    Abstract: The present invention searches for, in order of priority, a combination of material property parameters having a significant relationship, from among arbitrary combinations of multiple material property parameters.
    Type: Application
    Filed: February 7, 2018
    Publication date: December 10, 2020
    Inventors: Michiko YOSHITAKE, Shinjiro YAGYU, Toyohiro CHIKYO, Isao KUWAJIMA
  • Patent number: 10830573
    Abstract: The purpose of the present invention is to measure a size of a liquid droplet easily and in a short period of time by combining outputs of multiple types of liquid droplet detectors having different size dependencies of a liquid droplet of detection signals. In one embodiment of the present invention, in the detector having a narrow gap width shown in FIG. 5(a), the electrodes are electrically conducted by the attachment of a small liquid droplet. On the other hand, in the detectors with a wide gap width shown in FIGS. 5(b) and 5(c), the electrodes are not electrically conducted unless a liquid droplet having a larger size is attached. By utilizing this, the size of a liquid droplet is determined. In a case where the liquid droplet is water, as a liquid droplet detector, for example, a detector of a type that detects a galvanic current by a cell formed by the attachment of water between the electrodes made of different kinds of metals may be used.
    Type: Grant
    Filed: May 11, 2017
    Date of Patent: November 10, 2020
    Assignee: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Jin Kawakita, Toyohiro Chikyo
  • Publication number: 20200249185
    Abstract: The present invention is to provide a small-sized dryness/wetness responsive sensor that detects a galvanic current with a high sensitivity as a principle of operation. According to one embodiment of the present invention, a dryness/wetness responsive sensor comprises a thin wire made of a first metal and a thin wire made of a second metal, the second metal is different from the first metal, the thin wire of the first metal and the thin wire of the second metal are disposed in juxtaposition with each other on an insulating substrate, and a surface state of a part between the thin wire of the first metal and the thin wire of the second metal is hydrophilic or hydrophobic.
    Type: Application
    Filed: August 23, 2018
    Publication date: August 6, 2020
    Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Jin KAWAKITA, Akihiko OHI, Tomoko OHKI, Naoki IKEDA, Toshihide NABATAME, Toyohiro CHIKYO
  • Publication number: 20200053837
    Abstract: The present invention is to provide a prevention method and a prevention system for preventing dew condensation and light scattering due to the dew condensation. According to one embodiment of the present invention, a fine liquid droplet capable of causing dew condensation is detected by a detection means for detecting a fine liquid droplet, and then the fine liquid droplet is removed on the basis of the detection. The detection means comprises a first thin wire made of a first metal, and a second thin wire made of a second metal or a semiconductor, the second metal is different from the first metal, the first thin wire and the second thin wire are dispose d in juxtaposition with each other on an insulating substrate, and a spacing between the first thin wire and the second thin wire is in a range of 20 nm or more and 10000 nm or less.
    Type: Application
    Filed: February 2, 2018
    Publication date: February 13, 2020
    Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Jin KAWAKITA, Toyohiro CHIKYO
  • Publication number: 20190310213
    Abstract: The purpose of the present invention is to realize a dew point measurement in which the generation of dew condensation is directly detected and the detection can be performed without using any optical system. In particular, the purpose of the present invention is to realize a dew point measuring device that is compact and has a high sensitivity. According to one embodiment of the present invention, a sudden change in current values before and after the dew point is detected by detecting the dew condensation to detect a galvanic current that flows due to a water droplet attached onto a surface of an insulating substrate on which thin wires of dissimilar metals are juxtaposed, and by controlling the temperature on the surface of the substrate. In this way, the dew point measurement in which the dew point can be directly measured and a measurement with simple configuration and high accuracy can be performed can be realized.
    Type: Application
    Filed: June 6, 2017
    Publication date: October 10, 2019
    Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Jin KAWAKITA, Toyohiro CHIKYO
  • Publication number: 20190178621
    Abstract: The purpose of the present invention is to measure a size of a liquid droplet easily and in a short period of time by combining outputs of multiple types of liquid droplet detectors having different size dependencies of a liquid droplet of detection signals. In one embodiment of the present invention, in the detector having a narrow gap width shown in FIG. 5(a), the electrodes are electrically conducted by the attachment of a small liquid droplet. On the other hand, in the detectors with a wide gap width shown in FIGS. 5(b) and 5(c), the electrodes are not electrically conducted unless a liquid droplet having a larger size is attached. By utilizing this, the size of a liquid droplet is determined. In a case where the liquid droplet is water, as a liquid droplet detector, for example, a detector of a type that detects a galvanic current by a cell formed by the attachment of water between the electrodes made of different kinds of metals may be used.
    Type: Application
    Filed: May 11, 2017
    Publication date: June 13, 2019
    Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Jin KAWAKITA, Toyohiro CHIKYO
  • Publication number: 20190145920
    Abstract: The present invention improves the sensitivity and the responsiveness of a dryness/wetness responsive sensor utilizing a galvanic current, allowing for downsizing of the dryness/wetness responsive sensor. Instead of the conventional structure in which an anode electrode and a cathode electrode are stacked with an intervening insulator, the present invention employs a structure in which both electrodes run in juxtaposition with each other on an insulating substrate in the form of, for example, a comb-shaped electrode as shown in the drawing. By utilizing a semiconductor manufacturing process or any other micro/nano-fabrication technology, an inter-electrode distance can be extremely shortened as compared with the conventional sensors, allowing enhancing the sensitivity per unit footprint of the electrodes. Accordingly, a decrease in the size of the dryness/wetness responsive sensor can be easily achieved.
    Type: Application
    Filed: December 19, 2018
    Publication date: May 16, 2019
    Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Jin KAWAKITA, Tadashi SHINOHARA, Toyohiro CHIKYO, Toshihide NABATAME, Akihiko OHI, Tomoko OHKI
  • Publication number: 20190139279
    Abstract: Provided are a search system and a search method capable of searching an unknown combination of material property parameters having a significant relationship based on already known relationships from among multiple arbitrary combinations of material property parameters. The search system includes a database, a graph generator, and a graph searcher, and is configured as follows: the database stores the plurality of pairs of material property parameters having mutual relationships, and the graph generator generates a graph in which material property parameters stored in the database are nodes, and an inter-node corresponding to the pairs of material property parameters stored to have mutual relationships is an edge. The graph searcher searches the graph generated by the graph generator based on a given search condition and outputs a search result.
    Type: Application
    Filed: December 9, 2016
    Publication date: May 9, 2019
    Inventors: Michiko YOSHITAKE, Shinjiro YAGYU, Toyohiro CHIKYO, Isao KUWAJIMA
  • Patent number: 10267756
    Abstract: A dryness/wetness responsive sensor having decreased size, and improved sensitivity and responsiveness. The present invention comprises a thin wire of a first metal and a thin wire of a second metal, which is different from the first metal, wherein the thin wires run in juxtaposition with each other on an insulating substrate, and wherein the spacing between the first thin wire and the second thin wire is in the range of 5 nm or more and less than 20 ?m.
    Type: Grant
    Filed: July 21, 2015
    Date of Patent: April 23, 2019
    Assignee: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Jin Kawakita, Tadashi Shinohara, Toyohiro Chikyo, Toshihide Nabatame, Akihiko Ohi, Tomoko Ohki
  • Patent number: 10043598
    Abstract: A process of producing a conducting material suitable for being filled in TSVs for LSI chip 3D package, etc. includes that a solution containing a monomer that provides a conducting polymer, anions, and metal ions such as Ag+ or Cu2+ is irradiated with ultraviolet radiation or light having the energy necessary for exciting electrons up to an energy level capable of reducing the metal ions to precipitate a conducting polymer/metal composite. This enables an electrical conductor of high electrical conductivity to be precipitated faster than could be achieved by conventional processes.
    Type: Grant
    Filed: July 27, 2012
    Date of Patent: August 7, 2018
    Assignee: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Jin Kawakita, Toyohiro Chikyo
  • Patent number: 9957371
    Abstract: Provided is a polymer nanowire which contains nanoparticles so as to have new functionalities. A thin film is formed on a substrate and includes functional nanoparticles and polymers, and further includes a photosensitive pigment as required. The thin film is irradiated with a pulsed laser. This causes a polymer nanowire containing the functional nanoparticles to grow from a surface of the thin film.
    Type: Grant
    Filed: December 13, 2012
    Date of Patent: May 1, 2018
    Assignee: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Michiko Sasaki, Masahiro Goto, Akira Kasahara, Toyohiro Chikyo, Masahiro Tosa
  • Patent number: 9825180
    Abstract: The present invention provides a thin-film transistor in which transistor characteristics such as drain current and threshold voltage are improved, and a method of manufacturing the same. The present invention provides a thin-film transistor provided with a source electrode (108), a drain electrode (109), a semiconductor layer (105), a gate electrode (103), and an insulating layer (104); wherein the semiconductor layer (105) contains a composite metal oxide obtained by adding to a first metal oxide an oxide having an oxygen dissociation energy that is at least 200 kJ/mol greater than the oxygen dissociation energy of the first metal oxide, whereby the amount of oxygen vacancy is controlled; and the insulating layer (104) is provided with an SiO2 layer, a high-permittivity first layer, and a high-permittivity second layer, whereby the dipoles generated at the boundary between the SiO2 layer and the high-permittivity layers are used to control the threshold voltage.
    Type: Grant
    Filed: August 26, 2016
    Date of Patent: November 21, 2017
    Assignee: National Institute for Materials Science
    Inventors: Toshihide Nabatame, Kazuhito Tsukagoshi, Shinya Aikawa, Toyohiro Chikyo
  • Patent number: 9703197
    Abstract: A resist film structure is provided, which allows a resist layer to have improved photosensitivity to EUV or electron beams without changing the photosensitivity of the resist material itself. A metal layer 1 with a thickness as small as a nanometer level is provided on a resist polymer layer 2 formed on a substrate 3. When the resist layer in this structure is exposed to light, the metal layer 1 produces a surface plasmon effect to enhance the irradiation to the resist film, so that the photosensitivity of the resist film is improved.
    Type: Grant
    Filed: September 25, 2014
    Date of Patent: July 11, 2017
    Assignee: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Jin Kawakita, Toyohiro Chikyo, Takayuki Nakane
  • Publication number: 20170167995
    Abstract: The present invention improves the sensitivity and the responsiveness of a dryness/wetness responsive sensor utilizing a galvanic current, allowing for downsizing of the dryness/wetness responsive sensor. Instead of the conventional structure in which an anode electrode and a cathode electrode are stacked with an intervening insulator, the present invention employs a structure in which both electrodes run in juxtaposition with each other on an insulating substrate in the form of, for example, a comb-shaped electrode as shown in the drawing. By utilizing a semiconductor manufacturing process or any other micro/nano-fabrication technology, an inter-electrode distance can be extremely shortened as compared with the conventional sensors, allowing enhancing the sensitivity per unit footprint of the electrodes. Accordingly, a decrease in the size of the dryness/wetness responsive sensor can be easily achieved.
    Type: Application
    Filed: July 21, 2015
    Publication date: June 15, 2017
    Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Jin KAWAKITA, Tadashi SHINOHARA, Toyohiro CHIKYO, Toshihide NABATAME, Akihiko OHI, Tomoko OHKI
  • Patent number: 9622346
    Abstract: A conductive polymer-metal complex becomes to be adhered simply and strongly on the surface of a substrate such as PTFE. By subjecting a solution containing a monomer which provides a conductive polymer, an anion, and a metal ions such as Ag+, Cu2+, Cu+ and the like to an irradiation with light having an energy required for exciting an electron to an energy level capable of reducing the metal ion, such as ultraviolet light, under an appropriated condition, thereby precipitating the conductive polymer-metal complex as being dispersed in the reaction liquid. By supplying this dispersion liquid onto various substrates, the complex microparticles in the dispersion liquid enter into and mate with the narrow holes on the surface of the substrate. As a result, the complex precipitate formed on the surface of the substrate and the substrate can be adhered strongly to each other.
    Type: Grant
    Filed: October 21, 2013
    Date of Patent: April 11, 2017
    Assignee: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Jin Kawakita, Toyohiro Chikyo, Yasuo Hashimoto, Barbara Horvath