Patents Assigned to NGK Insulators, Ltd.
  • Patent number: 10712307
    Abstract: A heater 72 of a heater portion includes linear portions 78 and bend portions 77. A resistance value per unit length of the bend portions 77 at least at a temperature within a temperature range of no less than 700° C. and no more than 900° C. is lower than a resistance value per unit length of the linear portions 78.
    Type: Grant
    Filed: August 17, 2016
    Date of Patent: July 14, 2020
    Assignee: NGK INSULATORS, LTD.
    Inventors: Yusuke Watanabe, Takao Murase, Masashi Yasui, Rui Sakaguchi
  • Patent number: 10710062
    Abstract: A honeycomb structure includes a pillar-shaped honeycomb structure body having porous partition walls, wherein the partition walls have projecting portions, a shape of each cell is polygonal, in the polygonal cell, the projecting portions are disposed on two sides extending from a corner of the cell, respectively, the projecting portions are non-uniformly arranged, a relation of Formula (1) is satisfied, and a ratio of a total number of the corners is 2.5% or more: Formula (1): 1/(N+1)<A/L.
    Type: Grant
    Filed: March 15, 2018
    Date of Patent: July 14, 2020
    Assignee: NGK Insulators, Ltd.
    Inventor: Takayuki Ogata
  • Patent number: 10710324
    Abstract: A manufacturing method of a honeycomb structure forming die includes a linear slit forming step of forming, in a kneaded material discharging surface of a die substrate, a plurality of linear slits which are straight from one end to the other end on the kneaded material discharging surface, a slit sealing material disposing step of disposing a slit sealing material in parts of the plurality of linear slits, and a back hole forming step of forming back holes to introduce a kneaded material, in a kneaded material introducing surface of the die substrate which is present on a side opposite to the kneaded material discharging surface.
    Type: Grant
    Filed: January 25, 2017
    Date of Patent: July 14, 2020
    Assignee: NGK Insulators, Ltd.
    Inventors: Toshihiro Hirakawa, Toshio Yamada, Yukio Miyairi
  • Publication number: 20200220239
    Abstract: A heat pipe disclosed herein may include a tubular body sealing a working fluid therein; and a wick disposed on at least a part of inside of the tubular body. The tubular body may include a ceramic portion constituted of a ceramic material. An axial length of the ceramic portion may be equal to or greater than L/2, where L is an axial length of the tubular body.
    Type: Application
    Filed: March 19, 2020
    Publication date: July 9, 2020
    Applicant: NGK Insulators, Ltd.
    Inventors: Toshikatsu KASHIWAYA, Mikio TANAKA, Hiroki ABE
  • Publication number: 20200220158
    Abstract: There is provided a secondary zinc battery including: a unit cell including; a positive-electrode plate including a positive-electrode active material layer and a positive-electrode collector; a negative-electrode plate including a negative-electrode active material layer containing zinc and a negative-electrode collector; a layered double hydroxide (LDH) separator covering or wrapping around the entire negative-electrode active material layer; and an electrolytic solution. The positive-electrode collector has a positive-electrode collector tab extending from one edge of the positive-electrode active material layer, and the negative-electrode collector has a negative-electrode collector tab extending from the opposite edge of the negative-electrode active material layer and beyond a vertical edge of the LDH separator. The unit cell can thereby collects electricity from the positive-electrode collector tab and the negative-electrode collector tab.
    Type: Application
    Filed: March 16, 2020
    Publication date: July 9, 2020
    Applicant: NGK INSULATORS, LTD.
    Inventors: Junki Matsuya, Yuichi Gonda, Takeshi Yagi, Kenshin Kitoh
  • Publication number: 20200219755
    Abstract: A wafer mounting table includes a first electrode and a second electrode buried inside of a ceramic substrate having a wafer mounting surface so as to be parallel to the wafer mounting surface with the first electrode closer to the wafer mounting surface than the second electrode. The wafer mounting table includes a conductive section that electrically conducts the first electrode and the second electrode. The conductive section is such that a plurality of circular members comprised of plate-shaped metal meshes parallel to the wafer mounting surface are stacked between the first electrode and the second electrode.
    Type: Application
    Filed: February 24, 2020
    Publication date: July 9, 2020
    Applicant: NGK INSULATORS, LTD.
    Inventors: Yuji AKATSUKA, Masaki ISHIKAWA, Kazuhiro NOBORI, Akiyoshi HATTORI, Keiichi NAKAMURA
  • Publication number: 20200216364
    Abstract: An oriented ceramic sintered body production method includes (a) a step of preparing a ceramic compact before firing into an oriented ceramic sintered body; and (b) a step of obtaining an oriented ceramic sintered body by sandwiching the ceramic compact between a pair of releasing sheets, placing the ceramic compact and the releasing sheets in a hot press firing furnace, and hot press firing the ceramic compact while applying a pressure by a pair of punches through the pair of releasing sheets, wherein each of the releasing sheets is a releasing sheet such that, after the releasing sheet is sandwiched between PET films, is then placed and vacuum-packed on a stainless steel sheet, and is isostatically pressed at 200 kg/cm2, a surface of the releasing sheet on the side opposite from the stainless steel sheet has a profile curve with a maximum profile height Pt of 0.8 ?m or less.
    Type: Application
    Filed: March 13, 2020
    Publication date: July 9, 2020
    Applicant: NGK INSULATORS, LTD.
    Inventors: Morimichi WATANABE, Kei SATO, Kiyoshi MATSUSHIMA, Takahiro MAEDA, Jun YOSHIKAWA, Tsutomu NANATAKI
  • Patent number: 10703697
    Abstract: An organic compound refinement method for refining a specific organic compound which is a target compound from at least two types of organic compounds. The method includes separating the target compound from an organic compound other than the target compound while the at least two types of organic compounds are irradiated with light at an infrared absorption wavelength of a specific functional group that is not contained in the target compound but is contained in the organic compound other than the target compound, or separating the target compound from an organic compound other than the target compound while the at least two types of organic compounds are irradiated with light at an infrared absorption wavelength of a specific functional group that is contained in the target compound but is not contained in the organic compound other than the target compound.
    Type: Grant
    Filed: February 14, 2019
    Date of Patent: July 7, 2020
    Assignee: NGK Insulators, Ltd.
    Inventors: Kousuke Niwa, Hiroaki Isobe
  • Patent number: 10702822
    Abstract: A honeycomb filter includes a plugged honeycomb structure body which has cell rows arranged along one direction in a cross section of the honeycomb structure body and including a first cell row constituted of at least one of an inflow cell and an outflow cell, and a through-cell, and a second cell row including no through-cells. A width P1 (mm) of the first cell row, a width P2 (mm) of the second cell and a curvature radius R of a curved shape of corner portions of a polygonal shape of each cell satisfy relations of Equations (1) and (2) below: Equation (1): 2?100?(P1/P2×100)?50, and Equation (2): 0.4?(R/1000)/((P1+P2)/2)×100?20.
    Type: Grant
    Filed: April 11, 2018
    Date of Patent: July 7, 2020
    Assignee: NGK Insulators, Ltd.
    Inventors: Yasushi Kato, Takahiro Kondo
  • Patent number: 10707373
    Abstract: There is provided a self-supporting polycrystalline gallium nitride substrate having excellent characteristics such as high luminous efficiency and high conversion efficiency when used for devices, such as light emitting devices and solar cells. The self-supporting polycrystalline gallium nitride substrate is composed of gallium nitride-based single crystal grains having a specific crystal orientation in a direction approximately normal to the substrate, and has a top surface and a bottom surface. The crystal orientations of individual gallium nitride-based single crystal grains as determined from inverse pole figure mapping by electron backscatter diffraction (EBSD) analysis on the top surface are distributed at various tilt angles from the specific crystal orientation, in which the average tilt angle thereof is 0.1° or more and less than 1° and the cross-sectional average diameter DT of the gallium nitride-based single crystal grains at the outermost surface exposed on the top surface is 10 ?m or more.
    Type: Grant
    Filed: August 9, 2018
    Date of Patent: July 7, 2020
    Assignee: NGK Insulators, Ltd.
    Inventors: Morimichi Watanabe, Kei Sato, Yoshitaka Kuraoka, Katsuhiro Imai, Tsutomu Nanataki
  • Publication number: 20200212288
    Abstract: Provided is a method for producing a piezoelectric element in which a piezoelectric body substrate piece is subjected to polarization treatment and a piezoelectric element is produced. The method includes a first step in which the piezoelectric body substrate piece is held on a flat plate-shaped slightly adhesive sheet and a second step in which voltage is applied to the piezoelectric body substrate piece held on the slightly adhesive sheet and the piezoelectric body substrate piece is subjected to polarization treatment.
    Type: Application
    Filed: March 10, 2020
    Publication date: July 2, 2020
    Applicant: NGK Insulators, Ltd.
    Inventors: Hiroki OBATA, Masayuki UETANI, Ryusuke IKEDA
  • Publication number: 20200214130
    Abstract: A connection structure for a wiring substrate and a flexible substrate including a wiring substrate and a flexible substrate, in which the wiring substrate includes an insulating member, conductor layer, and ground layer, the flexible substrate includes an insulating sheet and metal film, and the metal film includes a signal line pad joined to the conductor layer via a joining material when viewed from the back surface of the flexible substrate. When viewed from behind the flexible substrate, there is an overlap region where the signal line pad and conductor layer overlap. In a cross-section when the overlap region is cut in a direction perpendicular to a signal transmission direction, in a case where a width of the signal line pad including the overlap region is W, and a width of the conductor layer including the overlap region is W0, the connection structure satisfies W0<W.
    Type: Application
    Filed: March 3, 2020
    Publication date: July 2, 2020
    Applicants: NGK Electronics Devices, Inc., NGK Insulators, Ltd.
    Inventors: Takashi KAWAMURA, Masato ISHIZAKI, Naoki GOTOU
  • Publication number: 20200209134
    Abstract: A particle detection element used to detect the number of particles in a gas includes: a casing having a gas flow passage through which the gas passes; an electric charge generating unit that imparts charges generated by a discharge to the particles in the gas introduced into the casing to thereby form charged particles; and a collecting unit including a collecting electrode that is disposed inside the casing and collects a collection target that is the charged particles or the charges not imparted to the particles. The casing has a reinforcing portion on at least one of an outer circumferential surface and an inner circumferential surface of the casing, and the reinforcing portion partially thickens a wall of the gas flow passage.
    Type: Application
    Filed: March 3, 2020
    Publication date: July 2, 2020
    Applicant: NGK INSULATORS, LTD.
    Inventors: KEIICHI KANNO, Kazuyuki Mizuno, Hidemasa Okumura
  • Publication number: 20200212289
    Abstract: Provided is a chip component manufacturing method which enables a plurality of chip pieces to be handled while being pasted to a sheet, and in which it is possible to apply at least a surface treatment to a plurality of chip pieces while being pasted to a sheet. This chip component manufacturing method comprises: a step for retaining a green sheet or the like on a carrier sheet; a step for cutting, together with a portion of the carrier sheet, the green sheet or the like retained on the carrier sheet; a step for removing, together with a portion of the carrier sheet, at least a dummy portion of the green sheet or the like that has been cut, so as to leave a plurality of chip pieces on the carrier sheet; and a step for applying at least a surface treatment to lateral surface portions of the plurality of chip pieces that have become exposed due to the removing while the plurality of chip pieces are being retained on the carrier sheet.
    Type: Application
    Filed: March 9, 2020
    Publication date: July 2, 2020
    Applicants: NGK Insulators, Ltd., NGK Ceramic Device Co., Ltd.
    Inventors: Isamu Oguma, Takatomo Ogata, Shigeru Funabashi, Hidetake Ota
  • Publication number: 20200209302
    Abstract: Provided is a method for inspecting a piezoelectric element in which voltage is applied to a piezoelectric element and evaluation of the electrical characteristics of the piezoelectric element is performed. The method includes a first step in which the piezoelectric element is held on a flat plate-shaped slightly adhesive sheet and a second step in which voltage is applied to the piezoelectric element held on the slightly adhesive sheet and evaluation of the electrical characteristics of the piezoelectric element is performed.
    Type: Application
    Filed: March 10, 2020
    Publication date: July 2, 2020
    Applicant: NGK Insulators, Ltd.
    Inventors: Hiroki Obata, Masayuki Uetani, Ryusuke Ikeda
  • Patent number: 10696010
    Abstract: A plugged honeycomb structure includes: a plurality of honeycomb segments, a bonding layer, and a plugging portions to plug open ends of cells of each of the honeycomb segments. The honeycomb segment is configured so that the cells having at least two kinds of different shapes are disposed in a cross section orthogonal to an extension direction of the cells, the honeycomb segment has a center region and an circumferential region located in the circumference of the center region, the center region has a cell arrangement pattern such that inflow cells surround one outflow cell, in the inflow end face of the honeycomb segment, the circumferential region has an open frontal area that is smaller than an open frontal area of the center region, the segment circumferential wall of the honeycomb segment and the bonding layer have a special thickness.
    Type: Grant
    Filed: August 24, 2016
    Date of Patent: June 30, 2020
    Assignee: NGK Insulators, Ltd.
    Inventors: Kazuya Mori, Toshihiro Hirakawa
  • Patent number: 10700385
    Abstract: Provided is a battery including a layered double hydroxide. The battery includes a positive electrode, a negative electrode, an electrolytic solution being an aqueous alkali metal hydroxide solution, and a layered double hydroxide having a fundamental composition represented by the formula: M2+1?xM3+x(OH)2An?x/n·mH2O where M2+ represents a divalent cation, M3+ represents a trivalent cation, An? represents an n-valent anion, n is an integer of 1 or more, x is 0.1 to 0.4, and m is any real number, the layered double hydroxide being in contact with the electrolytic solution, wherein a metal compound containing a metal corresponding to M2+ and/or M3+ is dissolved in the electrolytic solution such that erosion of the layered double hydroxide by the electrolytic solution is suppressed. The present invention provides a highly reliable battery such that the degradation of a layered double hydroxide (LDH) contained in the battery can be significantly reduced.
    Type: Grant
    Filed: March 28, 2017
    Date of Patent: June 30, 2020
    Assignee: NGK Insulators, Ltd.
    Inventors: Shohei Yokoyama, Sho Yamamoto, Naohito Yamada
  • Patent number: 10700328
    Abstract: The present invention provides a unit cell for a nickel-zinc battery in the form of a cell pack having positive and negative electrodes reliably separated by a hydroxide ion-conductive separator, which can be readily handled and is very advantageous for forming an assembled battery. The nickel-zinc cell pack of the invention includes: a flexible bag comprising flexible films; a separation sheet liquid-tightly connected to the interior of the flexible bag to separate a positive-electrode chamber and a negative-electrode chamber for inhibiting liquid communication therebetween; a positive electrode and a positive-electrode electrolytic solution disposed in the positive-electrode chamber; a negative electrode and a negative-electrode electrolytic solution disposed in the negative-electrode chamber, wherein the separation sheet comprises a separator structure comprising a separator exhibiting hydroxide-ion conductivity and water impermeability.
    Type: Grant
    Filed: November 28, 2017
    Date of Patent: June 30, 2020
    Assignee: NGK Insulators, Ltd.
    Inventors: Yuichi Gonda, Kenshin Kitoh
  • Patent number: 10695708
    Abstract: A plugged honeycomb structure includes a honeycomb structure body, and a plurality of plugging portions, the honeycomb structure body further includes pass-through hole portions each of which is formed in at least a part of a partition wall intersection portion in which the partition walls intersect in one end face and each of which interconnects a pair of cells facing each other at a position corresponding to the partition wall intersection portion to enable pass-through of a fluid, and a value obtained by dividing a diameter of a first virtual inscribed circle inscribed at a position of a minimum hole width of the pass-through hole portion by a diameter of a second virtual inscribed circle inscribed at a position of a minimum plugging width between the plugging portions facing each other is in a range of 0.05 to 0.74.
    Type: Grant
    Filed: February 7, 2017
    Date of Patent: June 30, 2020
    Assignee: NGK Insulators, Ltd.
    Inventor: Takayuki Ogata
  • Patent number: 10701762
    Abstract: A heat radiation device includes a heat source, a meta-material structure layer arranged on a front surface side of the heat source and configured to radiate radiant energy in a specific wavelength range by converting heat energy inputted from the heat source into the radiant energy in the specific wavelength range, and a rear-surface metal layer arranged on a rear surface side of the heat source. An average emissivity of the rear-surface metal layer is smaller than an average emissivity of the meta-material structure layer.
    Type: Grant
    Filed: September 20, 2018
    Date of Patent: June 30, 2020
    Assignee: NGK Insulators, Ltd.
    Inventor: Yoshio Kondo