Patents by Inventor Yoshiki Iwazaki

Yoshiki Iwazaki 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: 20210035744
    Abstract: A multilayer ceramic device includes a ceramic main body including a plurality of internal electrodes laminated in a first direction, the ceramic main body having a pair of end surfaces respectively facing a second direction perpendicular to the first direction and a direction opposite to the second direction; a pair of protective layers covering respective entire areas of said pair of end surfaces, the protective layers each including at least one of Al, Si, Cr, Zn, Ga, Ge, In, Sn, W, Pt, Au and Bi as a main component thereof; and a pair of external electrodes respectively covering the pair of end surfaces through the pair of protective layers, respectively.
    Type: Application
    Filed: July 31, 2020
    Publication date: February 4, 2021
    Applicant: TAIYO YUDEN CO., LTD.
    Inventors: Teruo ATSUMI, Yoshiki IWAZAKI
  • Patent number: 10431383
    Abstract: A multilayer ceramic capacitor includes: a pair of external electrodes; a first internal electrode containing a base metal and coupled to one of the pair external electrodes; a dielectric layer stacked on the first internal electrode and containing a ceramic material and the base metal; and a second internal electrode stacked on the dielectric layer, containing the base metal, and coupled to another one of the external electrodes, wherein a concentration of the base metal in each of five regions, which are equally divided regions of a region between locations 50 nm away from the first and second internal electrodes in a stacking direction between the first and second internal electrodes, is within ±20% of an average of the concentrations of the base metal in the five regions, and thicknesses of the first internal electrode and the second internal electrode are 0.2 ?m or greater.
    Type: Grant
    Filed: March 13, 2017
    Date of Patent: October 1, 2019
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Koichiro Morita, Katsuya Taniguchi, Minoru Ryu, Yoshiki Iwazaki
  • Patent number: 10431385
    Abstract: A multilayer ceramic capacitor includes: a pair of external electrodes; a first internal electrode containing a base metal and coupled to one of the external electrodes; a dielectric layer stacked on the first internal electrode and containing a ceramic material and the base metal; and a second internal electrode stacked on the dielectric layer, containing the base metal, and coupled to another one of the external electrodes, wherein a concentration of the base metal in each of five regions, which are equally divided regions of a region between locations 50 nm away from the first and second internal electrodes in a stacking direction between the first and second internal electrodes, is within ±20% of an average of the concentrations of the base metal in the five regions, and an average grain size in the dielectric layer is 200 nm or less.
    Type: Grant
    Filed: March 13, 2017
    Date of Patent: October 1, 2019
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Katsuya Taniguchi, Koichiro Morita, Minoru Ryu, Yoshiki Iwazaki
  • Patent number: 10431384
    Abstract: A multilayer ceramic capacitor includes: a pair of external electrodes; a first internal electrode containing a base metal and coupled to one of the external electrodes; a dielectric layer stacked on the first internal electrode and containing the base metal and a ceramic material mainly composed of barium titanate; and a second internal electrode stacked on the dielectric layer, containing the base metal, and coupled to another one of the external electrodes, wherein a concentration of the base metal in each of five regions, which are equally divided regions between locations 50 nm away from the first and second internal electrodes in a stacking direction between the first and second internal electrodes, is within ±20% of an average of the concentrations of the base metal in the five regions, and an atomic concentration ratio of Mg to Ti is 0 or greater and less than 0.002 in the dielectric layer.
    Type: Grant
    Filed: March 13, 2017
    Date of Patent: October 1, 2019
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Koichiro Morita, Katsuya Taniguchi, Minoru Ryu, Yoshiki Iwazaki
  • Patent number: 10260132
    Abstract: In an embodiment, a magnetic body includes soft magnetic alloy grains 11 containing Fe, element L, and element M (where element L is Si or Zr and element M is a metal element other than Si or Zr that oxidizes more easily than Fe), as well as oxide film produced from oxidization of part of these grains 11; wherein at least some of the bonds between adjacent soft magnetic alloy grains 11 are by way of the oxide film; the oxide film has an inner film 12a, and an outer film 12b positioned on the outer side of the inner film 12a; and the inner film 12a contains more of element L than element M, while the outer film 12b contains more of element M than element L.
    Type: Grant
    Filed: March 31, 2016
    Date of Patent: April 16, 2019
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Minoru Ryu, Shinsuke Takeoka, Yoko Orimo, Yoshiki Iwazaki, Kenji Otake
  • Patent number: 10199169
    Abstract: A multilayer ceramic capacitor includes: a pair of external electrodes; a first internal electrode that is coupled to one of the pair of external electrodes; a dielectric layer that is stacked on the first internal electrode and contains BaTiO3 and Ni; and a second internal electrode that is stacked on the dielectric layer, contains Ni, and is coupled to another one of the pair of external electrodes, wherein Ni is contained in five regions, which are equally divided region of a region between locations 50 nm away from the first and second internal electrodes in a stacking direction between the first and second internal electrodes, and a Ni concentration in at least one of end regions located closest to the first internal electrode and the second internal electrode among the five regions is greater than a Ni concentration in a central region of the five regions by 10% or more.
    Type: Grant
    Filed: March 10, 2017
    Date of Patent: February 5, 2019
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Yoshiki Iwazaki, Katsuya Taniguchi, Minoru Ryu, Koichiro Morita
  • Patent number: 10163569
    Abstract: A multilayer ceramic capacitor includes: a pair of external electrodes; a first internal electrode containing a base metal and coupled to one of the external electrodes; a dielectric layer stacked on the first internal electrode and containing a ceramic material and the base metal; and a second internal electrode stacked on the dielectric layer, containing the base metal, and coupled to another one of the external electrodes, wherein a concentration of the base metal in each of five regions is within ±20% of an average of the concentrations of the base metal in the five regions, the five regions being obtained by dividing a region from a location 50 nm away from the first internal electrode of the dielectric layer to a location 50 nm away from the second internal electrode of the dielectric layer in a stacking direction between the first and second internal electrodes equally into five.
    Type: Grant
    Filed: March 13, 2017
    Date of Patent: December 25, 2018
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Koichiro Morita, Minoru Ryu, Katsuya Taniguchi, Yoshiki Iwazaki
  • Patent number: 10147546
    Abstract: A multilayer ceramic capacitor includes: a pair of external electrodes; a first internal electrode containing a base metal and coupled to one of the external electrodes; a dielectric layer stacked on the first internal electrode and containing a ceramic material and the base metal; and a second internal electrode stacked on the dielectric layer, containing the base metal, and coupled to another one of the pair external electrodes, a concentration of the base metal in each of five regions, which are equally divided regions of a region between locations 50 nm away from the first and second internal electrodes in a stacking direction between the first and second internal electrodes, being within ±20% of an average of the concentrations of the base metal in the five regions, an average grain number in the dielectric layer being three or less in the stacking direction between the first and second internal electrodes.
    Type: Grant
    Filed: March 13, 2017
    Date of Patent: December 4, 2018
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Koichiro Morita, Katsuya Taniguchi, Minoru Ryu, Yoshiki Iwazaki
  • Patent number: 10096425
    Abstract: A multilayer ceramic capacitor includes a laminate constituted by internal electrode layers of different polarities alternately layered via dielectric layers, wherein the multilayer ceramic capacitor is such that the dielectric layers contain ceramic grains whose primary component is BaTiO3, the ceramic grains contain Mo, Mn, rare earth R, and at least one of V and W, and the average valence number of Mo in the ceramic grains is 4.50 to 5.50. The multilayer ceramic capacitor can offer excellent service life characteristics and sufficiently suppress leak current even when the thickness of the dielectric layer is 0.8 ?m or less.
    Type: Grant
    Filed: July 26, 2016
    Date of Patent: October 9, 2018
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Chie Kawamura, Yoichiro Ogata, Tetsuo Shimura, Minoru Ryu, Yoshiki Iwazaki
  • Patent number: 10056192
    Abstract: A multilayer ceramic capacitor includes: a pair of external electrodes; a first internal electrode containing a base metal and coupled to one of the external electrodes; a dielectric layer stacked on the first internal electrode and containing a ceramic material and the base metal; and a second internal electrode stacked on the dielectric layer, containing the base metal, and coupled to another one of the external electrodes, wherein a concentration of the base metal in each of five regions, which are equally divided regions of a region between locations 50 nm away from the first and second internal electrodes in a stacking direction between the first and second internal electrodes, is within ±20% of an average of the concentrations of the base metal in the five regions, and the dielectric layer has a thickness of 0.6 ?m or less.
    Type: Grant
    Filed: March 13, 2017
    Date of Patent: August 21, 2018
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Katsuya Taniguchi, Koichiro Morita, Minoru Ryu, Yoshiki Iwazaki
  • Patent number: 10056191
    Abstract: A multilayer ceramic capacitor includes: a pair of external electrodes; a first internal electrode that is coupled to one of the pair of external electrodes; a dielectric layer that is stacked on the first internal electrode and contains BaTiO3 and Ni; and a second internal electrode that is stacked on the dielectric layer, contains Ni, and is coupled to another one of the pair of external electrodes, wherein Ni concentrations obtained by analyzing five regions with a transmission electron microscope are within a range from 0.015 to 0.045, the five regions being obtained by dividing a region from a location 50 nm away from the first internal electrode of the dielectric layer to a location 50 nm away from the second internal electrode of the dielectric layer in a stacking direction between the first internal electrode and the second internal electrode equally into five.
    Type: Grant
    Filed: March 10, 2017
    Date of Patent: August 21, 2018
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Minoru Ryu, Katsuya Taniguchi, Koichiro Morita, Yoshiki Iwazaki
  • Publication number: 20170365410
    Abstract: A multilayer ceramic capacitor includes: a pair of external electrodes; a first internal electrode containing a base metal and coupled to one of the external electrodes; a dielectric layer stacked on the first internal electrode and containing a ceramic material and the base metal; and a second internal electrode stacked on the dielectric layer, containing the base metal, and coupled to another one of the pair external electrodes, a concentration of the base metal in each of five regions, which are equally divided regions of a region between locations 50 nm away from the first and second internal electrodes in a stacking direction between the first and second internal electrodes, being within ±20% of an average of the concentrations of the base metal in the five regions, an average grain number in the dielectric layer being three or less in the stacking direction between the first and second internal electrodes.
    Type: Application
    Filed: March 13, 2017
    Publication date: December 21, 2017
    Inventors: Koichiro MORITA, Katsuya TANIGUCHI, Minoru RYU, Yoshiki IWAZAKI
  • Publication number: 20170365412
    Abstract: A multilayer ceramic capacitor includes: a pair of external electrodes; a first internal electrode containing a base metal and coupled to one of the external electrodes; a dielectric layer stacked on the first internal electrode and containing a ceramic material and the base metal; and a second internal electrode stacked on the dielectric layer, containing the base metal, and coupled to another one of the external electrodes, wherein a concentration of the base metal in each of five regions, which are equally divided regions of a region between locations 50 nm away from the first and second internal electrodes in a stacking direction between the first and second internal electrodes, is within ±20% of an average of the concentrations of the base metal in the five regions, and an average grain size in the dielectric layer is 200 nm or less.
    Type: Application
    Filed: March 13, 2017
    Publication date: December 21, 2017
    Inventors: Katsuya TANIGUCHI, Koichiro MORITA, Minoru RYU, Yoshiki IWAZAKI
  • Publication number: 20170365406
    Abstract: A multilayer ceramic capacitor includes: a pair of external electrodes; a first internal electrode that is coupled to one of the pair of external electrodes; a dielectric layer that is stacked on the first internal electrode and contains BaTiO3 and Ni; and a second internal electrode that is stacked on the dielectric layer, contains Ni, and is coupled to another one of the pair of external electrodes, wherein Ni concentrations obtained by analyzing five regions with a transmission electron microscope are within a range from 0.015 to 0.045, the five regions being obtained by dividing a region from a location 50 nm away from the first internal electrode of the dielectric layer to a location 50 nm away from the second internal electrode of the dielectric layer in a stacking direction between the first internal electrode and the second internal electrode equally into five.
    Type: Application
    Filed: March 10, 2017
    Publication date: December 21, 2017
    Inventors: Minoru RYU, Katsuya TANIGUCHI, Koichiro MORITA, Yoshiki IWAZAKI
  • Publication number: 20170365407
    Abstract: A multilayer ceramic capacitor includes: a pair of external electrodes; a first internal electrode containing a base metal and coupled to one of the external electrodes; a dielectric layer stacked on the first internal electrode and containing a ceramic material and the base metal; and a second internal electrode stacked on the dielectric layer, containing the base metal, and coupled to another one of the external electrodes, wherein a concentration of the base metal in each of five regions is within ±20% of an average of the concentrations of the base metal in the five regions, the five regions being obtained by dividing a region from a location 50 nm away from the first internal electrode of the dielectric layer to a location 50 nm away from the second internal electrode of the dielectric layer in a stacking direction between the first and second internal electrodes equally into five.
    Type: Application
    Filed: March 13, 2017
    Publication date: December 21, 2017
    Inventors: Koichiro MORITA, Minoru RYU, Katsuya TANIGUCHI, Yoshiki IWAZAKI
  • Publication number: 20170365405
    Abstract: A multilayer ceramic capacitor includes: a pair of external electrodes; a first internal electrode that is coupled to one of the pair of external electrodes; a dielectric layer that is stacked on the first internal electrode and contains BaTiO3 and Ni; and a second internal electrode that is stacked on the dielectric layer, contains Ni, and is coupled to another one of the pair of external electrodes, wherein Ni is contained in five regions, which are equally divided region of a region between locations 50 nm away from the first and second internal electrodes in a stacking direction between the first and second internal electrodes, and a Ni concentration in at least one of end regions located closest to the first internal electrode and the second internal electrode among the five regions is greater than a Ni concentration in a central region of the five regions by 10% or more.
    Type: Application
    Filed: March 10, 2017
    Publication date: December 21, 2017
    Inventors: Yoshiki IWAZAKI, Katsuya TANIGUCHI, Minoru RYU, Koichiro MORITA
  • Publication number: 20170365408
    Abstract: A multilayer ceramic capacitor includes: a pair of external electrodes; a first internal electrode containing a base metal and coupled to one of the pair external electrodes; a dielectric layer stacked on the first internal electrode and containing a ceramic material and the base metal; and a second internal electrode stacked on the dielectric layer, containing the base metal, and coupled to another one of the external electrodes, wherein a concentration of the base metal in each of five regions, which are equally divided regions of a region between locations 50 nm away from the first and second internal electrodes in a stacking direction between the first and second internal electrodes, is within ±20% of an average of the concentrations of the base metal in the five regions, and thicknesses of the first internal electrode and the second internal electrode are 0.2 ?m or greater.
    Type: Application
    Filed: March 13, 2017
    Publication date: December 21, 2017
    Inventors: Koichiro MORITA, Katsuya TANIGUCHI, Minoru RYU, Yoshiki IWAZAKI
  • Publication number: 20170365411
    Abstract: A multilayer ceramic capacitor includes: a pair of external electrodes; a first internal electrode containing a base metal and coupled to one of the external electrodes; a dielectric layer stacked on the first internal electrode and containing a ceramic material and the base metal; and a second internal electrode stacked on the dielectric layer, containing the base metal, and coupled to another one of the external electrodes, wherein a concentration of the base metal in each of five regions, which are equally divided regions of a region between locations 50 nm away from the first and second internal electrodes in a stacking direction between the first and second internal electrodes, is within ±20% of an average of the concentrations of the base metal in the five regions, and the dielectric layer has a thickness of 0.6 ?m or less.
    Type: Application
    Filed: March 13, 2017
    Publication date: December 21, 2017
    Inventors: Katsuya TANIGUCHI, Koichiro MORITA, Minoru RYU, Yoshiki IWAZAKI
  • Publication number: 20170365409
    Abstract: A multilayer ceramic capacitor includes: a pair of external electrodes; a first internal electrode containing a base metal and coupled to one of the external electrodes; a dielectric layer stacked on the first internal electrode and containing the base metal and a ceramic material mainly composed of barium titanate; and a second internal electrode stacked on the dielectric layer, containing the base metal, and coupled to another one of the external electrodes, wherein a concentration of the base metal in each of five regions, which are equally divided regions between locations 50 nm away from the first and second internal electrodes in a stacking direction between the first and second internal electrodes, is within ±20% of an average of the concentrations of the base metal in the five regions, and an atomic concentration ratio of Mg to Ti is 0 or greater and less than 0.002 in the dielectric layer.
    Type: Application
    Filed: March 13, 2017
    Publication date: December 21, 2017
    Inventors: Koichiro MORITA, Katsuya TANIGUCHI, Minoru RYU, Yoshiki IWAZAKI
  • Patent number: RE47989
    Abstract: An acoustic wave device includes: a piezoelectric film made of an aluminum nitride film containing a divalent element and a tetravalent element, or a divalent element and a pentavalent element; and an electrode that excites an acoustic wave propagating through the piezoelectric film.
    Type: Grant
    Filed: July 20, 2017
    Date of Patent: May 12, 2020
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Tsuyoshi Yokoyama, Yoshiki Iwazaki, Tokihiro Nishihara, Yosuke Onda