Patents by Inventor Koichiro Morita
Koichiro Morita 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).
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Publication number: 20180240592Abstract: A multilayer ceramic capacitor includes: a multilayer structure in which each of ceramic dielectric layers and each of internal electrode layers are alternately stacked, the plurality of internal electrode layers being alternately exposed to a first edge face and a second edge face of the multilayer structure, wherein: a region in which a set of internal electrode layers exposed to the first edge face of the multilayer structure face with another set of internal electrode layers exposed to the second edge face of the multilayer structure is a capacity region; at least a part of the circumference region around the capacity region has a protective region of which an average grain diameter of a main component ceramic is larger than that of the capacity region and of which a concentration of a donor element in the main component ceramic is larger than that of the capacity region.Type: ApplicationFiled: February 8, 2018Publication date: August 23, 2018Inventor: Koichiro MORITA
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Patent number: 10056191Abstract: 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: GrantFiled: March 10, 2017Date of Patent: August 21, 2018Assignee: TAIYO YUDEN CO., LTD.Inventors: Minoru Ryu, Katsuya Taniguchi, Koichiro Morita, Yoshiki Iwazaki
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Patent number: 10056192Abstract: 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: GrantFiled: March 13, 2017Date of Patent: August 21, 2018Assignee: TAIYO YUDEN CO., LTD.Inventors: Katsuya Taniguchi, Koichiro Morita, Minoru Ryu, Yoshiki Iwazaki
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Publication number: 20170365409Abstract: 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: ApplicationFiled: March 13, 2017Publication date: December 21, 2017Inventors: Koichiro MORITA, Katsuya TANIGUCHI, Minoru RYU, Yoshiki IWAZAKI
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Publication number: 20170365405Abstract: 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: ApplicationFiled: March 10, 2017Publication date: December 21, 2017Inventors: Yoshiki IWAZAKI, Katsuya TANIGUCHI, Minoru RYU, Koichiro MORITA
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Publication number: 20170365407Abstract: 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: ApplicationFiled: March 13, 2017Publication date: December 21, 2017Inventors: Koichiro MORITA, Minoru RYU, Katsuya TANIGUCHI, Yoshiki IWAZAKI
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Publication number: 20170365408Abstract: 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: ApplicationFiled: March 13, 2017Publication date: December 21, 2017Inventors: Koichiro MORITA, Katsuya TANIGUCHI, Minoru RYU, Yoshiki IWAZAKI
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Publication number: 20170365406Abstract: 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: ApplicationFiled: March 10, 2017Publication date: December 21, 2017Inventors: Minoru RYU, Katsuya TANIGUCHI, Koichiro MORITA, Yoshiki IWAZAKI
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Publication number: 20170365412Abstract: 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: ApplicationFiled: March 13, 2017Publication date: December 21, 2017Inventors: Katsuya TANIGUCHI, Koichiro MORITA, Minoru RYU, Yoshiki IWAZAKI
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Publication number: 20170365410Abstract: 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: ApplicationFiled: March 13, 2017Publication date: December 21, 2017Inventors: Koichiro MORITA, Katsuya TANIGUCHI, Minoru RYU, Yoshiki IWAZAKI
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Publication number: 20170365411Abstract: 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: ApplicationFiled: March 13, 2017Publication date: December 21, 2017Inventors: Katsuya TANIGUCHI, Koichiro MORITA, Minoru RYU, Yoshiki IWAZAKI
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Publication number: 20170264146Abstract: Disclosed is a linear motor that can exert a high propulsive force and reduce cogging. A stator has a plurality of core units in a stroke direction. Each of the core units has a first core having a first magnetic pole and a second magnetic pole, which is different in polarity from the first magnetic pole, coils wound around the first core, a second core having a third magnetic pole and a fourth magnetic pole, which is different in polarity from the third magnetic pole, and coils wound around the second core. The third magnetic pole faces the first magnetic pole, and the fourth magnetic pole faces the second magnetic pole. A movable element is sandwiched between the first magnetic poles and the third magnetic poles, and between the second magnetic poles and the fourth magnetic poles.Type: ApplicationFiled: November 11, 2015Publication date: September 14, 2017Inventors: Hitoshi SHIBATA, Hiroshi KANESHIGE, Katsuya FUKUSHIMA, Masashi SUGIURA, Koichiro MORITA
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Patent number: 9721727Abstract: 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: GrantFiled: November 18, 2015Date of Patent: August 1, 2017Assignee: TAIYO YUDEN CO., LTDInventors: Chie Kawamura, Tetsuo Shimura, Minoru Ryu, Koichiro Morita, Yukihiro Konishi, Yoshiki Iwazaki
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Patent number: 9679698Abstract: A multi-layer ceramic capacitor has a structure where the dispersion, nd, of average grain size of the dielectric grains constituting the dielectric layer (a value (D90/D10) obtained by dividing D90 which is a grain size including 90% cumulative abundance of grains by D10 which is a grain size including 10% cumulative abundance of grains) is smaller than 4.Type: GrantFiled: November 13, 2012Date of Patent: June 13, 2017Assignee: TAIYO YUDEN CO., LTD.Inventors: Koichiro Morita, Tetsuo Shimura
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Publication number: 20170154732Abstract: A ceramic electronic component includes a ceramic body and external electrodes. The ceramic body includes ceramic layers formed of a ceramic material and laminated in a first axis direction, and internal electrode layers each including an extracted portion and disposed between the ceramic layers, the extracted portion being extracted to a circumference of each of the ceramic layers and having a width of 100 ?m or less along the circumference. The external electrodes contain the ceramic material, the external electrodes being provided to a surface of the ceramic body and each connected to the extracted portion.Type: ApplicationFiled: November 23, 2016Publication date: June 1, 2017Inventor: Koichiro Morita
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Patent number: 9666371Abstract: 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: GrantFiled: January 20, 2016Date of Patent: May 30, 2017Assignee: TAIYO YUDEN CO., LTD.Inventors: Koichiro Morita, Chie Kawamura, Minoru Ryu, Katsuya Taniguchi, Kazumichi Hiroi, Yoshiki Iwazaki
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Patent number: 9536666Abstract: A multi-layer ceramic capacitor has a laminate of dielectric layers and internal electrode layers laminated alternately with one another, as well as cover layers formed as the outermost layers at the top and bottom of the laminate in the laminating direction, wherein the dielectric layers are constituted by a sintered compact containing a barium titanate and a silicon compound, and a fresnoite phase having an average grain size of 1 ?m or less is present in the dielectric layers.Type: GrantFiled: November 13, 2012Date of Patent: January 3, 2017Assignee: TAIYO YUDEN CO., LTD.Inventors: Hideya Teraoka, Koichiro Morita, Youichi Mizuno
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Patent number: 9406441Abstract: A multi-layer ceramic capacitor is constituted by ceramic dielectric layers alternately laminated with conductive layers, wherein the ceramic dielectric layers are sintered in such a way that core-shell grains having a core-shell structure are mixed with uniform solid-solution grains resulting from uniform progression of the solid solution process. Such multi-layer ceramic capacitor is characterized in that the area ratio of the core-shell grains to all sintered grains constituting the ceramic dielectric layer is 5 to 15% and that the average grain size of all sintered grains including the core-shell grains and uniform solid-solution grains is 0.3 to 0.5 ?m.Type: GrantFiled: July 2, 2015Date of Patent: August 2, 2016Assignee: TAIYO YUDEN CO., LTD.Inventors: Koichiro Morita, Youichi Mizuno
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Publication number: 20160217924Abstract: 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: ApplicationFiled: January 20, 2016Publication date: July 28, 2016Inventors: Koichiro Morita, Chie Kawamura, Minoru Ryu, Katsuya Taniguchi, Kazumichi Hiroi, Yoshiki Iwazaki
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Publication number: 20160189865Abstract: 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: ApplicationFiled: November 18, 2015Publication date: June 30, 2016Inventors: Chie KAWAMURA, Tetsuo SHIMURA, Minoru RYU, Koichiro MORITA, Yukihiro KONISHI, Yoshiki IWAZAKI