Patents by Inventor Jin Kawakita

Jin Kawakita 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: 11913892
    Abstract: A condensation detection element comprises a condensation detection unit, the condensation detection unit being formed on a first substrate unit, and a peripheral circuit unit, the peripheral circuit unit being formed on a second substrate unit. The condensation detection unit comprises a thin wire electrode of a first metal and a thin wire electrode of a second metal. The condensation detection unit is configured to detect the presence or absence of water droplet that comes into contact with the thin wire electrode of the first metal and the thin wire electrode of the second metal by a current flowing between the thin wire electrode of the first metal and the thin wire electrode of the second metal. The first substrate unit has a higher thermal conductivity and a lower heat capacity than the second substrate unit.
    Type: Grant
    Filed: November 11, 2019
    Date of Patent: February 27, 2024
    Assignee: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventor: Jin Kawakita
  • 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
  • Publication number: 20220003701
    Abstract: A condensation detection element comprises a condensation detection unit, the condensation detection unit being formed on a first substrate unit, and a peripheral circuit unit, the peripheral circuit unit being formed on a second substrate unit. The condensation detection unit comprises a thin wire electrode of a first metal and a thin wire electrode of a second metal. The condensation detection unit is configured to detect the presence or absence of water droplet that comes into contact with the thin wire electrode of the first metal and the thin wire electrode of the second metal by a current flowing between the thin wire electrode of the first metal and the thin wire electrode of the second metal. The first substrate unit has a higher thermal conductivity and a lower heat capacity than the second substrate unit.
    Type: Application
    Filed: November 11, 2019
    Publication date: January 6, 2022
    Inventor: Jin KAWAKITA
  • 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
  • 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: 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
  • Publication number: 20170084538
    Abstract: By using silicon oxynitride with an oxygen content of 4.2 to 37.5 at % as a material for a barrier layer, adhesiveness similar to that of silicon oxide and an Ag diffusion prevention property similar to that of silicon nitride can be realized. In particular, in a semiconductor device in which a plurality of silicon chips is vertically stacked by through-silicon vias, Ag is prevented from being diffused into Si and adhesiveness to Si becomes favorable when an Ag/polypyrrole complex is used as a conductive filling material used for the formation of a barrier layer provided on the inner surface of the via.
    Type: Application
    Filed: May 14, 2015
    Publication date: March 23, 2017
    Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Jin KAWAKITA, Barbara HORVATH, Toyohiro CHIKYO
  • Publication number: 20160238937
    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: Application
    Filed: September 25, 2014
    Publication date: August 18, 2016
    Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Jin KAWAKITA, Toyohiro CHIKYO, Takayuki NAKANE
  • Publication number: 20150282310
    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: Application
    Filed: October 21, 2013
    Publication date: October 1, 2015
    Inventors: Jin Kawakita, Toyohiro Chikyo, Yasuo Hashimoto, Barbara Horvath
  • Patent number: 8802192
    Abstract: A coating method of the invention is characterized by using particles each being an aggregate comprising particles far smaller than that, and heating them at a temperature lower than the melting point and blowing and depositing the same to an object to be treated at a supersonic velocity. The warm spray of the invention is characterized in that standard particles and addition particles with a particle diameter larger than that are mixed so that the K-value determined by the following relation is 1 or more and 2 or less: K=A×(B/C)×D, A: mass % of the content of additive particles, B: center particle diameter of standard particle (?m), C: center particle diameter of additive particle (?m), D: (maximum particle diameter?minimum particle diameter) of additive particle/10 (?m). The invention intends to deposit micro oxide crystals without using an adhesive or the like, with no alteration to the function thereof, and also attain a dense layer with no substantial voids.
    Type: Grant
    Filed: September 14, 2007
    Date of Patent: August 12, 2014
    Assignee: National Institute for Materials Science
    Inventors: Jin Kawakita, Seiji Kuroda