Patents by Inventor Minoru Ryu

Minoru Ryu 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: 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: 20170345564
    Abstract: In an embodiment, a multilayer ceramic capacitor 10 has a first external electrode 12 and a second external electrode 13 that each contain metal grains MP and dielectric grains DP, where an oxide of the same metal element constituting the metal grain MP, or MO, is present at the interface between the metal grain MP and the dielectric grain DP. The multilayer ceramic capacitor can prevent the hardness of its external electrodes from dropping, even when the external electrodes contain metal grains and dielectric grains.
    Type: Application
    Filed: May 19, 2017
    Publication date: November 30, 2017
    Inventors: Minoru RYU, Mikio TAHARA, Hirokazu ORIMO
  • Publication number: 20170345567
    Abstract: In an embodiment, a multilayer ceramic capacitor 10 has a capacitor body comprising a capacitive part 11a constituted by multiple internal electrode layers 11al that are stacked with dielectric layers 11a2 in between, as well as dielectric cover parts 11b that respectively cover both sides of the capacitive part 11a in the stacking direction. Also, the dielectric layers 11a2 of the capacitive part 11a, and the dielectric cover parts 11b, contain elemental manganese, and the elemental manganese is distributed in such a way that its quantity gradually decreases in the depth direction from the exterior faces of the dielectric cover parts 11b toward the center of the dielectric layers 11a2 of the capacitive part 11a.
    Type: Application
    Filed: May 19, 2017
    Publication date: November 30, 2017
    Inventors: Daisuke SAKATE, Sadanori SHIMODA, Fumi TANIGUCHI, Minoru RYU
  • Patent number: 9721727
    Abstract: A multilayer ceramic capacitor has a laminate including dielectric layers laminated alternately with internal electrode layers of different polarities, wherein the dielectric layer contains ceramic grains having Ba, Ti, and X (wherein X represents at least one type of element selected from the group consisting of Mo, Ta, Nb, and W) and a variation in the concentration distribution of X above in the ceramic grain is within ±5%. The multilayer ceramic capacitor can offer excellent service life characteristics even when the thickness of the dielectric layer is 0.8 ?m or less, as well as excellent bias characteristics.
    Type: Grant
    Filed: November 18, 2015
    Date of Patent: August 1, 2017
    Assignee: TAIYO YUDEN CO., LTD
    Inventors: Chie Kawamura, Tetsuo Shimura, Minoru Ryu, Koichiro Morita, Yukihiro Konishi, Yoshiki Iwazaki
  • Publication number: 20170152187
    Abstract: Dielectric layers are prepared using a dielectric material that contains a ceramic powder having Ba, Ti, and additive element X which is solid-solubilized and is at least one element selected from the group consisting of Mo, Ta, Nb, and W, wherein the standard deviation of the ratio of the peak intensity of the additive element X (XK?) measured by STEM-EDX, and the sum of the peak intensity of the Ti and peak intensity of the Ba (BaL?+TiK?) measured by STEM-EDX, is less than 10.5% of the average ratio as measured at a total of five points including the three points that divide the maximum diameter of one grain of the ceramic powder into four equal parts, and two excluding the center point of the three points that divide the diameter crossing at right angles with the maximum diameter at its center point, into four equal parts.
    Type: Application
    Filed: November 29, 2016
    Publication date: June 1, 2017
    Inventors: Kunihiko NAGAOKA, Kazumichi HIROI, Minoru RYU, Chie KAWAMURA
  • Patent number: 9666371
    Abstract: A multilayer ceramic capacitor has a laminate comprising dielectric layers stacked alternately with internal electrode layers of different polarities, wherein: the dielectric layers contain ceramic grains whose primary component is BaTiO3; the ceramic grains contain at least one type of donor element (D) selected from the group that includes Nb, Mo, Ta, and W, and at least one type of acceptor element (A) selected from the group that includes Mg and Mn; and the ratio of the concentration of the donor element (D) and that of the acceptor element (A) (D/A) is greater than 1 at the center parts of the ceramic grains, while the D/A ratio is less than 1 at the outer edge parts of the ceramic grains (if A=0, then D/A=? and D=A=0 never occurs).
    Type: Grant
    Filed: January 20, 2016
    Date of Patent: May 30, 2017
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Koichiro Morita, Chie Kawamura, Minoru Ryu, Katsuya Taniguchi, Kazumichi Hiroi, Yoshiki Iwazaki
  • Publication number: 20170032895
    Abstract: A multilayer ceramic capacitor includes a laminate constituted by internal electrode layers of different polarities alternately stacked 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, and rare earth R, and the average valence number of Mo in the ceramic grains is 4.18 to 4.60. The multilayer ceramic capacitor can offer excellent service life characteristics and bias characteristics even when the thickness of the dielectric layer is 0.8 ?m or less.
    Type: Application
    Filed: July 26, 2016
    Publication date: February 2, 2017
    Inventors: Yoichiro OGATA, Chie KAWAMURA, Tetsuo SHIMURA, Minoru RYU, Yoshiki IWAZAKI
  • Publication number: 20170032894
    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: Application
    Filed: July 26, 2016
    Publication date: February 2, 2017
    Inventors: Chie KAWAMURA, Yoichiro OGATA, Tetsuo SHIMURA, Minoru RYU, Yoshiki IWAZAKI
  • Publication number: 20160293308
    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: Application
    Filed: March 31, 2016
    Publication date: October 6, 2016
    Inventors: Minoru RYU, Shinsuke TAKEOKA, Yoko ORIMO, Yoshiki IWAZAKI, Kenji OTAKE
  • Publication number: 20160217924
    Abstract: A multilayer ceramic capacitor has a laminate comprising dielectric layers stacked alternately with internal electrode layers of different polarities, wherein: the dielectric layers contain ceramic grains whose primary component is BaTiO3; the ceramic grains contain at least one type of donor element (D) selected from the group that includes Nb, Mo, Ta, and W, and at least one type of acceptor element (A) selected from the group that includes Mg and Mn; and the ratio of the concentration of the donor element (D) and that of the acceptor element (A) (D/A) is greater than 1 at the center parts of the ceramic grains, while the D/A ratio is less than 1 at the outer edge parts of the ceramic grains (if A=0, then D/A=? and D=A=0 never occurs).
    Type: Application
    Filed: January 20, 2016
    Publication date: July 28, 2016
    Inventors: Koichiro Morita, Chie Kawamura, Minoru Ryu, Katsuya Taniguchi, Kazumichi Hiroi, Yoshiki Iwazaki
  • Publication number: 20160189865
    Abstract: A multilayer ceramic capacitor has a laminate including dielectric layers laminated alternately with internal electrode layers of different polarities, wherein the dielectric layer contains ceramic grains having Ba, Ti, and X (wherein X represents at least one type of element selected from the group consisting of Mo, Ta, Nb, and W) and a variation in the concentration distribution of X above in the ceramic grain is within ±5%. The multilayer ceramic capacitor can offer excellent service life characteristics even when the thickness of the dielectric layer is 0.8 ?m or less, as well as excellent bias characteristics.
    Type: Application
    Filed: November 18, 2015
    Publication date: June 30, 2016
    Inventors: Chie KAWAMURA, Tetsuo SHIMURA, Minoru RYU, Koichiro MORITA, Yukihiro KONISHI, Yoshiki IWAZAKI
  • Publication number: 20130188292
    Abstract: [Problems] To provide a ceramic composition that retains a high insulation resistance after being fired in a reductive atmosphere to form a laminated body. [Means for Solving the Problem] A novel ceramic composition according to an embodiment of the invention include: (NaxK1-x)(NbyTa1-y)O3 (0?x?1.0, 0.3<y?1.0) as main ingredient and Li and F in an amount ranging from 0.1 to 10.0 mol, calculated on lithium fluoride basis, relative to 100 mol of the main ingredient.
    Type: Application
    Filed: July 25, 2012
    Publication date: July 25, 2013
    Inventors: KEISUKE KOBAYASHI, Clive A. Randall, Keiichi Hatano, Yutaka Doshida, Yoichi Mizuno, Minoru Ryu