Patents by Inventor Yuji Katsuda

Yuji Katsuda 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: 11011404
    Abstract: The ceramic structure 10 includes a discoid ceramic base 12 and an electrode 14 buried in the ceramic base 12. The ceramic base 12 is a sintered body composed principally of alumina or a rare-earth metal oxide and has a thermal expansion coefficient of 7.5 to 9.5 ppm/K over the range of 40° C. to 1200° C. The electrode 14 is composed principally of metal ruthenium. The electrode 14 may be formed in the shape of a sheet. Alternatively, the electrode 14 may be patterned in the manner of a one-stroke sketch so as to extend over the entire cross section of the ceramic base 12.
    Type: Grant
    Filed: January 9, 2017
    Date of Patent: May 18, 2021
    Assignee: NGK Insulators, Ltd.
    Inventors: Yuji Katsuda, Noboru Nishimura
  • Patent number: 10998881
    Abstract: A composite substrate includes a supporting substrate and a functional substrate that are directly joined together, the supporting substrate being a sintered sialon body.
    Type: Grant
    Filed: March 8, 2019
    Date of Patent: May 4, 2021
    Assignee: NGK Insulators, Ltd.
    Inventors: Yuki Nomoto, Kei Tanaka, Katsuhiro Inoue, Yuji Katsuda
  • Patent number: 10964974
    Abstract: A solid electrolyte is constituted by lithium phosphorus oxynitride (LiPON). A multiplication value obtained by multiplying a ratio of a peak intensity of nitrogen atoms having a single bond with one P atom and having a double bond with another P atom to a peak intensity of an N2 state in a Raman spectroscopy spectrum by a ratio of a content amount of N atoms to a content amount of P atoms is greater than or equal to 0.40.
    Type: Grant
    Filed: September 10, 2018
    Date of Patent: March 30, 2021
    Assignee: NGK Insulators, Ltd.
    Inventors: Miyuki Kojima, Yosuke Sato, Yuji Katsuda, Yoshiaki Nagasawa, Kazuyuki Kaigawa
  • Publication number: 20210009434
    Abstract: A lithium ion conductive material has a composition formula of Lia(OH)bFcBr, where 1.8?a?2.3, b=a?c?1, 0.01?c?0.11, and includes an antiperovskite-type crystal phase. Preferably, the lithium ion conductive material further includes a layered antiperovskite-type crystal phase. More preferably, 0?B/(A+B)?0.2 is satisfied, where A is the peak intensity in the vicinity of 2?=31.2° in the X-ray diffractometry using Cu-K? ray and B is the peak intensity in the vicinity of 2?=30.2°.
    Type: Application
    Filed: September 16, 2020
    Publication date: January 14, 2021
    Applicant: NGK INSULATORS, LTD.
    Inventors: Miyuki KOJIMA, Keita MIYANISHI, Yosuke SATO, Yuji KATSUDA
  • Publication number: 20200407279
    Abstract: The composite sintered body includes Al2O3, and MgAl2O4. The content of Al2O3 in the composite sintered body is not less than 95.5% by weight. The average sintered grain size of Al2O3 in the composite sintered body is not less than 2 ?m and not greater than 4 ?m. The standard deviation of sintered grain size distribution of Al2O3 in the composite sintered body is not greater than 0.35. The bulk density of the composite sintered body is not less than 3.94 g/cm3 and not greater than 3.98 g/cm3. In the composite sintered body, the ratio of amount of crystal phase of MgAl2O4 to that of Al2O3 is not less than 0.003 and not greater than 0.01.
    Type: Application
    Filed: September 16, 2020
    Publication date: December 31, 2020
    Applicant: NGK INSULATORS, LTD.
    Inventors: Kyohei ATSUJI, Noboru NISHIMURA, Asumi NAGAI, Yuji KATSUDA
  • Patent number: 10863587
    Abstract: A ceramic structure 10 includes a heater electrode 14 within a disk-shaped AlN ceramic substrate 12. The heater electrode 14 contains a metal filler in the main component WC. The metal filler (such as Ru or RuAl) has a lower resistivity and a higher thermal expansion coefficient than AlN. An absolute value of a difference |?CTE| between a thermal expansion coefficient of the AlN ceramic substrate 12 and a thermal expansion coefficient of the heater electrode 14 at a temperature in the range of 40° C. to 1000° C. is 0.35 ppm/° C. or less.
    Type: Grant
    Filed: February 6, 2017
    Date of Patent: December 8, 2020
    Assignee: NGK Insulators, Ltd.
    Inventors: Kyohei Atsuji, Noboru Nishimura, Yuji Katsuda
  • Publication number: 20200350196
    Abstract: A method of manufacturing a composite sintered body includes a step (Step S11) of molding mixed powder in which Al2O3, SiC, and MgO are mixed, into a green body having a predetermined shape and a step (Step S12) of generating a composite sintered body by sintering the green body. Then, in Step S11, the ratio of SiC to the mixed powder is not lower than 4.0 weight percentage and not higher than 13.0 weight percentage. Further, the purity of Al2O3 in Step S11 is not lower than 99.9%. It is thereby possible to suppress the abnormal grain growth of Al2O3 and suitably manufacture a composite sintered body having high relative dielectric constant and withstand voltage, and low tan ?.
    Type: Application
    Filed: July 21, 2020
    Publication date: November 5, 2020
    Applicant: NGK INSULATORS, LTD.
    Inventors: Asumi NAGAI, Katsuhiro INOUE, Yuji KATSUDA
  • Publication number: 20200343585
    Abstract: Provided is a solid electrolyte which contains a composition expressed by 3LiOH.Li2SO4. The solid electrolyte has a lithium ion conductivity of 0.1x10?6 S/cm or more at 25° C. and an activation energy of 0.6 eV or more.
    Type: Application
    Filed: July 8, 2020
    Publication date: October 29, 2020
    Applicants: NAGOYA INSTITUTE OF TECHNOLOGY, NGK INSULATORS, LTD.
    Inventors: Reona MIYAZAKI, Toshihiro YOSHIDA, Satoshi OZAKI, Yosuke SATO, Yuji KATSUDA
  • Publication number: 20200280047
    Abstract: There is provided an all-solid-state lithium battery including: a positive-electrode plate composed of a lithium complex oxide sintered body having a layered rock-salt structure; a solid electrolyte layer composed of a lithium-ion-conductive antiperovskite material; a negative-electrode plate containing Ti and permitting intercalation and deintercalation of lithium ions at 0.4 (vs. Li/Li+) V or more; a positive-electrode current collecting layer provided on a face, remote from the solid electrolyte layer, of the positive-electrode plate; a negative-electrode current collecting layer provided on a face, remote from the solid electrolyte layer, of the negative-electrode plate; a positive-electrode covering metal membrane provided at an interface between the positive-electrode plate and the solid electrolyte layer; and a negative-electrode covering metal membrane provided at an interface between the negative-electrode plate and the solid electrolyte layer.
    Type: Application
    Filed: May 18, 2020
    Publication date: September 3, 2020
    Applicant: NGK INSULATORS, LTD.
    Inventors: Kei TANAKA, Miyuki KOJIMA, Keita MIYANISHI, Yosuke SATO, Yuji KATSUDA, Yukihisa TAKEUCHI
  • Publication number: 20200266494
    Abstract: Provided is a secondary battery including: a positive electrode plate composed of an inorganic material containing a positive electrode active material in an oxide form and having a thickness of 25 ?m or more; a negative electrode plate composed of an inorganic material containing a negative electrode active material in an oxide form and having a thickness of 25 ?m or more; and an inorganic solid electrolyte, the secondary battery being charged and discharged at a temperature of 100° C. or higher.
    Type: Application
    Filed: May 4, 2020
    Publication date: August 20, 2020
    Applicant: NGK INSULATORS, LTD.
    Inventors: Yukihisa TAKEUCHI, Iwao OWADA, Yukinobu YURA, Yosuke SATO, Toshihiro YOSHIDA, Yuji KATSUDA
  • Publication number: 20200259217
    Abstract: Provided is an all-solid lithium battery including: a low-angle oriented positive electrode plate that is a lithium complex oxide sintered plate having a porosity of 10 to 50%; a negative electrode plate containing Ti and capable of intercalating and deintercalating lithium ions at 0.4 V or higher (vs. Li/Li+); and a solid electrolyte having a melting point lower than the melting point or pyrolytic temperature of the oriented positive electrode plate or the negative electrode plate, wherein at least 30% of pores in the oriented positive electrode plate is filled with the solid electrolyte in an observation of a cross-section perpendicular to a main face of the oriented positive electrode plate.
    Type: Application
    Filed: May 1, 2020
    Publication date: August 13, 2020
    Applicant: NGK INSULATORS, LTD.
    Inventors: Yukinobu YURA, Yukihisa TAKEUCHI, Yosuke SATO, Toshihiro YOSHIDA, Yuji KATSUDA
  • Publication number: 20200165168
    Abstract: A sintered compact includes an alumina phase as a primary phase, and further includes an amorphous phase containing Si and Mn and a cordierite phase. The sintered compact has a porosity of higher than or equal to 1.1% and less than or equal to 5.0%. Preferably, I1/(I1+I2) is greater than or equal to 0.20 and less than or equal to 0.45, where I1 is the strength of the main peak of cordierite obtained by an XRD method, and I2 is the strength of the main peak of alumina.
    Type: Application
    Filed: January 30, 2020
    Publication date: May 28, 2020
    Applicant: NGK INSULATORS, LTD.
    Inventors: Kyohei ATSUJI, Noboru NISHIMURA, Yuji KATSUDA
  • Patent number: 10631370
    Abstract: A member for a semiconductor manufacturing apparatus according to the present invention is a member that is to be joined to an aluminum nitride base member. The member is composed of a composite material including principal constituent phases that are aluminum nitride and a pseudopolymorph of aluminum nitride which includes silicon, aluminum, oxygen, and nitrogen. The pseudopolymorph of aluminum nitride has at least one periodic structure selected from a 27R phase and a 21R phase or an X-ray diffraction peak at least at 2?=59.8° to 60.8°. The composite material has a thermal conductivity of 50 W/mK or less at room temperature.
    Type: Grant
    Filed: October 20, 2016
    Date of Patent: April 21, 2020
    Assignee: NGK Insulators, Ltd.
    Inventors: Asumi Nagai, Noboru Nishimura, Yuji Katsuda
  • Publication number: 20190292105
    Abstract: The composite sintered body includes AlN and MgAl2O4. The open porosity of the composite sintered body is lower than 0.1%. The relative density of the composite sintered body is not lower than 99.5%. The total percentage of the AlN and the MgAl2O4 contained in the composite sintered body is not lower than 95 weight percentage and not higher than 100 weight percentage. The percentage of the MgAl2O4 contained in the composite sintered body is not lower than 15 weight percentage and not higher than 70 weight percentage. It is thereby possible to provide a high-density composite sintered body having high plasma corrosion resistance, high volume resistivity, and high thermal conductivity.
    Type: Application
    Filed: March 15, 2019
    Publication date: September 26, 2019
    Applicant: NGK INSULATORS, LTD.
    Inventors: En YAGI, Yuji KATSUDA
  • Patent number: 10399906
    Abstract: A SiAlON sintered body according to the present invention is represented by Si6-zAlzOzN8-z (0<z?4.2) and has an open porosity of 0.1% or less and a relative density of 99.9% or more. A ratio of a total of intensities of maximum peaks of components other than SiAlON to an intensity of a maximum peak of the SiAlON in an X-ray diffraction diagram is 0.005 or less.
    Type: Grant
    Filed: September 13, 2017
    Date of Patent: September 3, 2019
    Assignee: NGK Insulators, Ltd.
    Inventors: Yuki Nomoto, Katsuhiro Inoue, Kei Tanaka, Yuji Katsuda
  • Publication number: 20190207585
    Abstract: A composite substrate includes a supporting substrate and a functional substrate that are directly joined together, the supporting substrate being a sintered sialon body.
    Type: Application
    Filed: March 8, 2019
    Publication date: July 4, 2019
    Applicant: NGK INSULATORS, LTD.
    Inventors: Yuki NOMOTO, Kei TANAKA, Katsuhiro INOUE, Yuji KATSUDA
  • Patent number: 10293581
    Abstract: A first bonding material composition according to the present invention is a bonding material composition used when aluminum nitride sintered bodies containing a rare-earth metal oxide are bonded to each other, in which the bonding material composition contains, in addition to an O element-containing aluminum nitride raw material, (a) as a fluorine compound, at least one of a fluorine compound of an alkaline-earth metal and a fluorine compound of a rare-earth metal, or (b) as a fluorine compound, at least one of a fluorine compound of an alkaline-earth metal and a fluorine compound of a rare-earth metal, and a rare-earth metal oxide.
    Type: Grant
    Filed: August 25, 2016
    Date of Patent: May 21, 2019
    Assignee: NGK Insulators, Ltd.
    Inventors: Masashi Goto, Noboru Nishimura, Yuji Katsuda
  • Publication number: 20190006710
    Abstract: A solid electrolyte is constituted by lithium phosphorus oxynitride (LiPON). A multiplication value obtained by multiplying a ratio of a peak intensity of nitrogen atoms having a single bond with one P atom and having a double bond with another P atom to a peak intensity of an N2 state in a Raman spectroscopy spectrum by a ratio of a content amount of N atoms to a content amount of P atoms is greater than or equal to 0.40.
    Type: Application
    Filed: September 10, 2018
    Publication date: January 3, 2019
    Applicant: NGK INSULATORS, LTD.
    Inventors: Miyuki KOJIMA, Yosuke SATO, Yuji KATSUDA, Yoshiaki NAGASAWA, Kazuyuki KAIGAWA
  • Patent number: 9981876
    Abstract: A mullite-containing sintered body according to the present invention contains mullite and at least one selected from the group consisting of silicon nitride, silicon oxynitride, and sialon. It is preferable that the mullite-containing sintered body have a thermal expansion coefficient of less than 4.3 ppm/° C. at 40° C. to 400° C., an open porosity of 0.5% or less, and an average grain size of 1.5 ?m or less.
    Type: Grant
    Filed: March 9, 2017
    Date of Patent: May 29, 2018
    Assignee: NGK Insulators, Ltd.
    Inventors: Yoshinori Isoda, Yoshio Suzuki, Katsuhiro Inoue, Yuji Katsuda
  • Publication number: 20180079690
    Abstract: A SiAlON sintered body according to the present invention is represented by Si6-zAlzOzN8-z (0<z?4.2) and has an open porosity of 0.1% or less and a relative density of 99.9% or more. A ratio of a total of intensities of maximum peaks of components other than SiAlON to an intensity of a maximum peak of the SiAlON in an X-ray diffraction diagram is 0.005 or less.
    Type: Application
    Filed: September 13, 2017
    Publication date: March 22, 2018
    Applicant: NGK INSULATORS, LTD.
    Inventors: Yuki NOMOTO, Katsuhiro INOUE, Kei TANAKA, Yuji KATSUDA