Patents by Inventor Tetsuya KISUMI
Tetsuya KISUMI 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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Patent number: 11488780Abstract: A ceramic electronic component includes an outer electrode including a baked electrode layer including an electrically conductive metal and glass, and a plating film on a surface of the baked electrode layer. The baked electrode layer includes metal portions made of the electrically conductive metal and glass portions made of the glass and distributed so as to be in contact with the metal portions. Cracks starting from boundaries between the metal portions and the glass portions and extending toward the inner side of the glass portions are provided in the glass portions.Type: GrantFiled: September 1, 2021Date of Patent: November 1, 2022Assignee: MURATA MANUFACTURING CO., LTD.Inventor: Tetsuya Kisumi
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Publication number: 20220093336Abstract: A ceramic electronic component includes an outer electrode including a baked electrode layer including an electrically conductive metal and glass, and a plating film on a surface of the baked electrode layer. The baked electrode layer includes metal portions made of the electrically conductive metal and glass portions made of the glass and distributed so as to be in contact with the metal portions. Cracks starting from boundaries between the metal portions and the glass portions and extending toward the inner side of the glass portions are provided in the glass portions.Type: ApplicationFiled: September 1, 2021Publication date: March 24, 2022Inventor: Tetsuya KISUMI
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Publication number: 20220093333Abstract: A method for producing a ceramic electronic component includes providing an outer electrode, which includes forming a baked electrode layer by applying an electrically conductive paste including an electrically conductive metal and glass such that the electrically conductive paste covers an exposed portion of an inner electrode on a ceramic body and baking the applied electrically conductive paste, and forming a plating film on the surface of the baked electrode layer by electroplating. The baked electrode layer includes metal portions and glass portions distributed in contact with the metal portions. After the formation of the baked electrode layer, the surface of the baked electrode layer is subjected to barrel or blast processing using a powder having a Mohs hardness equal to or lower than that of the ceramic body.Type: ApplicationFiled: September 1, 2021Publication date: March 24, 2022Inventors: Tetsuya KISUMI, Yusuke YOKOTA
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Patent number: 10090108Abstract: A multilayer ceramic capacitor having an external electrode with a glass phase, where an occupation rate of the glass phase is 30% to 60% on an area ratio, and a maximum length c of the glass phase is 5 ?m or less.Type: GrantFiled: April 11, 2017Date of Patent: October 2, 2018Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Tetsuya Kisumi, Toshiki Nagamoto, Yasuhiro Nishisaka, Yoko Okabe
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Patent number: 9842698Abstract: A multilayer ceramic capacitor having a multilayer ceramic element with internal electrodes opposed to each other and dielectric ceramic layers interposed therebetween, and external electrodes on a surface of the multilayer ceramic element and electrically connected to the internal electrodes. The external electrodes contain a first non-precious metal as a first conductive component, and glass containing BaO and/or SrO, where a total content of the BaO and/or the SrO is 34 mol % or more. The internal electrodes have a second non-precious metal different from the first non-precious metal included in the external electrodes. A glass layer is formed at interfacial parts between the ceramic layers and the external electrodes, and a diffusion length thereof is within a range of 1 ?m to 5 ?m from joint interfaces between the external electrodes and the internal electrodes at the joints.Type: GrantFiled: October 21, 2015Date of Patent: December 12, 2017Assignee: MURATA MANUFACTURING CO., LTD.Inventor: Tetsuya Kisumi
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Publication number: 20170221635Abstract: A multilayer ceramic capacitor having an external electrode with a glass phase, where an occupation rate of the glass phase is 30% to 60% on an area ratio, and a maximum length c of the glass phase is 5 ?m or less.Type: ApplicationFiled: April 11, 2017Publication date: August 3, 2017Inventors: Tetsuya Kisumi, Toshiki Nagamoto, Yasuhiro Nishisaka, Yoko Okabe
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Patent number: 9667174Abstract: A ceramic electronic component includes a ceramic body, inner electrodes, a glass coating layer, and outer electrodes. The glass coating layer extends from an exposed portion of one of the inner electrodes at a first end surface to a first principal surface. The outer electrodes are each constituted by a plating film disposed directly above the glass coating layer. The glass coating layer includes a glass medium and metal powder particles that define conductive paths. The metal powder particles have an elongated or substantially elongated shape and are dispersed in the glass medium. The dimension of a portion of the glass coating layer located on the first principal surface in the length direction, is larger than that of a portion of the glass coating layer located on the first end surface in the thickness direction.Type: GrantFiled: February 27, 2014Date of Patent: May 30, 2017Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Yasuhiro Nishisaka, Satoshi Matsuno, Tetsuya Kisumi, Yoko Okabe
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Patent number: 9653211Abstract: A conductive paste includes a metal powder, a glass frit containing a Si component, and an organic vehicle. The metal powder has a flat shape with a ratio a/b of a maximum length a to a maximum thickness b of 2.5 or more, a molar content of SiO2 in the glass frit is 36 to 59 percent by mole, and a volume content of the glass frit is 6 to 11 percent by volume. In external electrodes of a multilayer ceramic capacitor using this conductive paste, the molar content of SiO2 in a glass phase is 38 to 60 percent by mole, and an occupation rate of the glass phase is 30% to 60% on the area ratio, and a maximum length c of the glass phase is 5 ?m or less.Type: GrantFiled: August 12, 2014Date of Patent: May 16, 2017Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Tetsuya Kisumi, Toshiki Nagamoto, Yasuhiro Nishisaka, Yoko Okabe
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Publication number: 20160133398Abstract: A ceramic electronic component includes a ceramic body, a glass coating layer, and an electrode terminal. The ceramic body includes a plurality of internal electrodes whose ends are exposed on the surface of the ceramic body. The glass coating layer covers a portion of the ceramic body on which the internal electrodes are exposed. The electrode terminal is provided directly on the glass coating layer. The electrode terminal includes a plating film. The glass coating layer is made of a glass medium in which metal powder particles are dispersed. The metal powder particles define conduction paths that electrically connect the internal electrodes with the electrode terminal.Type: ApplicationFiled: January 20, 2016Publication date: May 12, 2016Inventors: Yasuhiro NISHISAKA, Yukio SANADA, Tetsuya KISUMI, Toshiki NAGAMOTO, Masato KIMURA, Seiji KOGA
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Patent number: 9328014Abstract: A ceramic electronic component includes a ceramic body, a glass coating layer, and terminal electrodes. End portions of inner electrodes are exposed at a surface of the ceramic body. The glass coating layer covers portions of the ceramic body in which the inner electrodes are exposed. The terminal electrodes are disposed directly above the glass coating layer and are each constituted by a plating film. The glass coating layer includes a glass medium and metal powder particles that are dispersed in the glass medium and define conductive paths which electrically connect the inner electrodes and the terminal electrodes. The metal powder particles include first metal powder particles and second metal powder particles. The first metal powder particles are flat or substantially flat powder particles. The second metal powder particles are spherical or substantially spherical powder particles.Type: GrantFiled: February 27, 2014Date of Patent: May 3, 2016Assignee: Murata Manufacturing Co., Ltd.Inventors: Yasuhiro Nishisaka, Satoshi Matsuno, Tetsuya Kisumi, Yoko Okabe
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Patent number: 9275804Abstract: A ceramic electronic component includes a ceramic body, a glass coating layer, and an electrode terminal. The ceramic body includes a plurality of internal electrodes whose ends are exposed on the surface of the ceramic body. The glass coating layer covers a portion of the ceramic body on which the internal electrodes are exposed. The electrode terminal is provided directly on the glass coating layer. The electrode terminal includes a plating film. The glass coating layer is made of a glass medium in which metal powder particles are dispersed. The metal powder particles define conduction paths that electrically connect the internal electrodes with the electrode terminal.Type: GrantFiled: January 31, 2013Date of Patent: March 1, 2016Assignee: Murata Manufacturing Co., Ltd.Inventors: Yasuhiro Nishisaka, Yukio Sanada, Tetsuya Kisumi, Toshiki Nagamoto, Masato Kimura, Seiji Koga
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Publication number: 20160042867Abstract: A multilayer ceramic capacitor having a multilayer ceramic element with internal electrodes opposed to each other and dielectric ceramic layers interposed therebetween, and external electrodes on a surface of the multilayer ceramic element and electrically connected to the internal electrodes. The external electrodes contain a first non-precious metal as a first conductive component, and glass containing BaO and/or SrO, where a total content of the BaO and/or the SrO is 34 mol % or more. The internal electrodes have a second non-precious metal different from the first non-precious metal included in the external electrodes. A glass layer is formed at interfacial parts between the ceramic layers and the external electrodes, and a diffusion length thereof is within a range of 1 ?m to 5 ?m from joint interfaces between the external electrodes and the internal electrodes at the joints.Type: ApplicationFiled: October 21, 2015Publication date: February 11, 2016Inventor: TETSUYA KISUMI
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Patent number: 9232673Abstract: A ceramic electronic component includes a ceramic body; a plurality of internal electrodes provided in the ceramic body and including ends exposed on a surface of the ceramic body; a coating layer covering a surface portion of the ceramic body on which the internal electrodes are exposed, the coating layer being made of a glass or resin medium in which metal powder particles are dispersed; and an electrode terminal provided directly on the coating layer and including a plating film. The metal powder particles define conduction paths electrically connecting the internal electrodes with the electrode terminal and have an elongated shape in cross section along a thickness direction of the coating layer. The metal powder particles defining the conduction paths have a maximum diameter not smaller than the thickness of the coating layer.Type: GrantFiled: January 31, 2013Date of Patent: January 5, 2016Assignee: Murata Manufacturing Co., Ltd.Inventors: Yasuhiro Nishisaka, Yukio Sanada, Tetsuya Kisumi, Toshiki Nagamoto
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Patent number: 9224543Abstract: A ceramic electronic component includes a ceramic body, a plurality of internal electrodes provided in the ceramic body and including ends exposed on a surface of the ceramic body; a glass coating layer covering a portion of the surface of the ceramic body on which the internal electrodes are exposed; and an electrode terminal provided directly on the glass coating layer and including a plating film. The glass coating layer is made of a glass medium in which metal powder particles are dispersed. The internal electrodes project from the surface of the ceramic body into the glass coating layer without passing through the glass coating layer. The metal powder particles define conduction paths electrically connecting the internal electrodes with the electrode terminal.Type: GrantFiled: January 31, 2013Date of Patent: December 29, 2015Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Yasuhiro Nishisaka, Yukio Sanada, Tetsuya Kisumi, Akira Ishizuka
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Publication number: 20140347783Abstract: A conductive paste includes a metal powder, a glass frit containing a Si component, and an organic vehicle. The metal powder has a flat shape with a ratio a/b of a maximum length a to a maximum thickness b of 2.5 or more, a molar content of SiO2 in the glass frit is 36 to 59 percent by mole, and a volume content of the glass frit is 6 to 11 percent by volume. In external electrodes of a multilayer ceramic capacitor using this conductive paste, the molar content of SiO2 in a glass phase is 38 to 60 percent by mole, and an occupation rate of the glass phase is 30% to 60% on the area ratio, and a maximum length c of the glass phase is 5 ?m or less.Type: ApplicationFiled: August 12, 2014Publication date: November 27, 2014Inventors: Tetsuya Kisumi, Toshiki Nagamoto, Yasuhiro Nishisaka, Yoko Okabe
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Publication number: 20140292141Abstract: A ceramic electronic component includes a ceramic body, inner electrodes, a glass coating layer, and outer electrodes. The glass coating layer extends from an exposed portion of one of the inner electrodes at a first end surface to a first principal surface. The outer electrodes are each constituted by a plating film disposed directly above the glass coating layer. The glass coating layer includes a glass medium and metal powder particles that define conductive paths. The metal powder particles have an elongated or substantially elongated shape and are dispersed in the glass medium. The dimension of a portion of the glass coating layer located on the first principal surface in the length direction, is larger than that of a portion of the glass coating layer located on the first end surface in the thickness direction.Type: ApplicationFiled: February 27, 2014Publication date: October 2, 2014Applicant: MURATA MANUFACTURING CO., LTD.Inventors: Yasuhiro NISHISAKA, Satoshi MATSUNO, Tetsuya KISUMI, Yoko OKABE
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Publication number: 20140292142Abstract: A ceramic electronic component includes a ceramic body, a glass coating layer, and terminal electrodes. End portions of inner electrodes are exposed at a surface of the ceramic body. The glass coating layer covers portions of the ceramic body in which the inner electrodes are exposed. The terminal electrodes are disposed directly above the glass coating layer and are each constituted by a plating film. The glass coating layer includes a glass medium and metal powder particles that are dispersed in the glass medium and define conductive paths which electrically connect the inner electrodes and the terminal electrodes. The metal powder particles include first metal powder particles and second metal powder particles. The first metal powder particles are flat or substantially flat powder particles. The second metal powder particles are spherical or substantially spherical powder particles.Type: ApplicationFiled: February 27, 2014Publication date: October 2, 2014Applicant: Murata Manufacturing Co., Ltd.Inventors: Yasuhiro NISHISAKA, Satoshi MATSUNO, Tetsuya KISUMI, Yoko OKABE