Patents by Inventor Katsuya Taniguchi
Katsuya Taniguchi 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: 20200090867Abstract: A measuring method for measuring a concentration of a donor element which is solid-solved in ceramic grains of a plurality of ceramic dielectric layers, includes measuring (a current value at 10 V/?m when a direct voltage is applied to a plurality of ceramic dielectric layers at 125 degrees C.)/(a current value at 10 V/?m when a direct voltage is applied to the plurality of the ceramic dielectric layers at 85 degrees C.), with respect to a multilayer ceramic capacitor having a multilayer structure in which each of the plurality of ceramic dielectric layers and each of a plurality of internal electrode layers are alternately stacked.Type: ApplicationFiled: November 21, 2019Publication date: March 19, 2020Inventor: Katsuya TANIGUCHI
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Publication number: 20190355519Abstract: A multilayer ceramic capacitor includes: a multilayer structure in which each of a plurality of dielectric layers and each of a plurality of internal electrode layers are alternately stacked, wherein a concentration of a rare earth element in an active region with respect to a main component ceramic of the active region is equal to or more than a concentration of a rare earth element in at least a part of a protective region with respect to a main component ceramic of the protective region, wherein an average ionic radius of the rare earth element of the at least a part of the protective region is equal to or less than an average ionic radius of the rare earth element in the active region.Type: ApplicationFiled: May 10, 2019Publication date: November 21, 2019Inventor: Katsuya TANIGUCHI
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Patent number: 10431385Abstract: 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: GrantFiled: March 13, 2017Date of Patent: October 1, 2019Assignee: TAIYO YUDEN CO., LTD.Inventors: Katsuya Taniguchi, Koichiro Morita, Minoru Ryu, Yoshiki Iwazaki
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Patent number: 10431383Abstract: 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: GrantFiled: March 13, 2017Date of Patent: October 1, 2019Assignee: TAIYO YUDEN CO., LTD.Inventors: Koichiro Morita, Katsuya Taniguchi, Minoru Ryu, Yoshiki Iwazaki
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Patent number: 10431384Abstract: 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: GrantFiled: March 13, 2017Date of Patent: October 1, 2019Assignee: TAIYO YUDEN CO., LTD.Inventors: Koichiro Morita, Katsuya Taniguchi, Minoru Ryu, Yoshiki Iwazaki
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Publication number: 20190279816Abstract: A multilayer ceramic capacitor includes: a multilayer structure in which each of a plurality of dielectric layers and each of internal electrode layers are alternately stacked; wherein a main component of the dielectric layers is a ceramic material, wherein a main phase of the ceramic material has a perovskite structure expressed by a general formula ABO3, wherein a B site of the ceramic material includes an element acting as a donor; wherein an A site and the B site of the ceramic material includes a rare earth element, wherein (an amount of the rare earth element substitutionally solid-solved in the A site)/(an amount of the rare earth element substitutionally solid-solved in the B site) is 0.75 or more and 1.25 or less.Type: ApplicationFiled: February 26, 2019Publication date: September 12, 2019Inventors: Katsuya TANIGUCHI, Tsuyoshi SOGABE
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Patent number: 10199169Abstract: 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: GrantFiled: March 10, 2017Date of Patent: February 5, 2019Assignee: TAIYO YUDEN CO., LTD.Inventors: Yoshiki Iwazaki, Katsuya Taniguchi, Minoru Ryu, Koichiro Morita
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Patent number: 10163569Abstract: 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: GrantFiled: March 13, 2017Date of Patent: December 25, 2018Assignee: TAIYO YUDEN CO., LTD.Inventors: Koichiro Morita, Minoru Ryu, Katsuya Taniguchi, Yoshiki Iwazaki
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Patent number: 10147546Abstract: 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: GrantFiled: March 13, 2017Date of Patent: December 4, 2018Assignee: TAIYO YUDEN CO., LTD.Inventors: Koichiro Morita, Katsuya Taniguchi, Minoru Ryu, Yoshiki Iwazaki
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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: 20180233284Abstract: A multilayer ceramic capacitor includes: a multilayer structure in which each of a plurality of ceramic dielectric layers and each of a plurality of internal electrode layers are alternately stacked, wherein: (a current value at 10 V/?m when a direct voltage is applied to the plurality of the ceramic dielectric layers at 125 degrees C.)/(a current value at 10 V/?m when a direct voltage is applied to the plurality of the ceramic dielectric layers at 85 degrees C.) is more than 5 and less than 20; and a donor element concentration in the plurality of ceramic dielectric layers is 0.05 atm % or more and 0.3 atm % or less.Type: ApplicationFiled: February 5, 2018Publication date: August 16, 2018Inventor: Katsuya TANIGUCHI
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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: 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: 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: 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: 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: 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: 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: 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