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公开(公告)号：US20240161950A1
公开(公告)日：2024-05-16
申请号：US18550067
申请日：2022-03-09
Inventor： Yuto AKIYAMA , Sayaka WATANABE , Yuji YAMAGISHI
IPC: H01C7/112 , C04B35/453 , C04B35/64 , H01C1/148 , H01C7/18
CPC classification number: H01C7/112 , C04B35/453 , C04B35/64 , H01C1/148 , H01C7/18
Abstract: A multilayer ceramic component according to the present disclosure includes a sintered body, a plurality of internal electrodes, and a side surface electrode. The side surface electrode includes: a primary electrode layer containing silver as a main component thereof; and a plating layer covering the primary electrode layer at least partially. The primary electrode layer includes a first terminal portion provided for the side surface of the sintered body and a second terminal portion. The second terminal portion extends, in a second direction, from at least one of a pair of end portions of the first terminal portion in a third direction and is provided for at least one of a pair of principal surfaces. An interposed portion is formed by allowing a part of the plating layer to enter a region where a tip of the second terminal portion and the sintered body are separate from each other.
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公开(公告)号：US20230245806A1
公开(公告)日：2023-08-03
申请号：US18098998
申请日：2023-01-19
Inventor： Naoki MUTOU , Yoshiyuki SATOU , Yuji YAMAGISHI , Ken YANAI
IPC: H01C7/112 , H01C7/18 , C04B35/453 , C04B35/64
CPC classification number: H01C7/112 , C04B35/64 , C04B35/453 , H01C7/18
Abstract: A method for manufacturing a multilayer varistor includes: a first step including providing a multilayer stack in which a plurality of green sheet layers, each containing a Zn oxide powder as a main component and a Pr oxide powder as a sub-component, and a plurality of internal electrode paste layers, each containing a Pd powder, are alternately stacked; and a second step including forming a sintered compact, including an internal electrode inside, by baking the multilayer stack. The second step includes: a first sub-step including baking the multilayer stack by setting an oxygen concentration in an atmosphere at 1000 ppm by volume or less while increasing a temperature from 500° C. to 800° C.; and a second sub-step including baking, after the first sub-step, the multilayer stack by setting the oxygen concentration in the atmosphere at 1000 ppm by volume or more while increasing the temperature to a maximum allowable temperature.
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公开(公告)号：US20230245805A1
公开(公告)日：2023-08-03
申请号：US18099008
申请日：2023-01-19
Inventor： Yuji YAMAGISHI , Yoshiyuki SATOU , Naoki MUTOU
Abstract: A multilayer varistor according to the present disclosure includes a sintered compact, at least one pair of internal electrodes, and at least one pair of external electrodes. The sintered compact contains at least a Zn oxide and a Pr oxide. The at least one pair of internal electrodes are provided inside the sintered compact and contain, as a main component, at least one selected from the group consisting of Pd and Ag and, as a sub-component, an oxide of at least one element selected from the group consisting of Pr, Mn, Co, and Sb. The at least one pair of external electrodes are arranged to cover the sintered compact partially and electrically connected to the at least one pair of internal electrodes, respectively.
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公开(公告)号：US20220310291A1
公开(公告)日：2022-09-29
申请号：US17838961
申请日：2022-06-13
Inventor： Ken YANAI , Tomokazu YAMAGUCHI , Yuji YAMAGISHI , Naoki MUTOU , Sayaka MATSUMOTO , Ryosuke USUI
Abstract: A sintered body that includes semiconductor ceramic layers and an internal electrode which are alternately stacked on one another is prepared. A first external electrode is formed on a side surface of the sintered body such that the first external electrode is connected to the internal electrode. An insulating layer is formed on a surface of the sintered body by applying a glass coating over an entire of the sintered body having the formed first external electrode. The insulating layer is exposed from the first external electrode. A second external electrode is formed on the first external electrode. This method provides the produced multilayer electronic component with a stable electric connection between the internal electrodes and the external electrodes.
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公开(公告)号：US20230274863A1
公开(公告)日：2023-08-31
申请号：US18173584
申请日：2023-02-23
Inventor： Yuto AKIYAMA , Ken YANAI , Ryosuke USUI , Yuji YAMAGISHI , Masashi TAKAMURA
Abstract: A multilayer varistor according to the present disclosure includes; a sintered compact; an internal electrode provided inside the sintered compact; a high-resistivity layer arranged to cover the sintered compact at least partially; and an external electrode arranged to cover the high-resistivity layer partially and electrically connected to the internal electrode. The high-resistivity layer includes a thinner region having a smaller thickness than a surrounding region that surrounds the thinner region.
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Patent Agency Ranking
公开(公告)号：US20230207159A1
公开(公告)日：2023-06-29
申请号：US18068282
申请日：2022-12-19
Inventor： Yuto AKIYAMA , Ken YANAI , Ryosuke USUI , Yuji YAMAGISHI
Abstract: A multilayer varistor includes: a sintered compact; an internal electrode provided inside the sintered compact; a high-resistivity layer arranged to cover the sintered compact at least partially and containing element Si; and an external electrode arranged to cover the high-resistivity layer partially, electrically connected to the internal electrode, and containing silver as a main component thereof. A ratio of a total mass of the alkali metals and the alkaline earth metals to a mass of the element Si in a surface region of the high-resistivity layer is equal to or less than 0.6.
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公开(公告)号：US20230081158A1
公开(公告)日：2023-03-16
申请号：US17892711
申请日：2022-08-22
Inventor： Keiji KAWAJIRI , Naoki MUTOU , Hironori MOTOMITSU , Michiya WATANABE , Yuji YAMAGISHI
IPC: H01C7/102 , H01C7/112 , H01C7/10 , H01C1/142 , H01C17/065
Abstract: A varistor includes a sintered body, an internal electrode, an insulating layer, and an external electrode. The internal electrode is disposed in an interior of the sintered body. The insulating layer covers at least part of the sintered body and includes Zn2SiO4. The external electrode is electrically connected to the internal electrode, covers part of the sintered body and part of the insulating layer, and is in contact with the part of the insulating layer. The insulating layer has a region being in contact with the external electrode, the region having a greater average thickness than a region of the insulating layer which is out of contact with the external electrode.
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公开(公告)号：US20240300819A1
公开(公告)日：2024-09-12
申请号：US18552398
申请日：2021-11-30
Inventor： Youji SHIRATO , Norihiro KAWAMURA , Yuji YAMAGISHI , Mitsuru TAMAOKI
CPC classification number: C01B32/21 , H05K7/2039 , C01P2004/03 , C01P2006/90 , H01L23/42 , H01L24/29 , H01L24/32 , H01L2224/29193 , H01L2224/32245
Abstract: The problem to be overcome by the present disclosure is to provide a graphite sheet with the ability to lower the contact thermal resistance at the surface of the graphite sheet. In a graphite sheet, a plurality of graphite layers are stacked one on top of another in a thickness direction. The plurality of graphite layers includes: a first graphite layer that forms an outermost layer of the graphite sheet; and a second graphite layer other than the first graphite layer. At least a part of the second graphite layer is exposed through a surface of the first graphite layer. The graphite sheet has an apparent shear strength equal to or greater than 0.1 MPa and equal to or less than 0.5 MPa as measured by SAICAS method from a depth of 0.5 m to a depth of 19 m.
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公开(公告)号：US20240013955A1
公开(公告)日：2024-01-11
申请号：US18252671
申请日：2021-11-16
Inventor： Keiji KAWAJIRI , Naoki MUTOU , Hironori MOTOMITSU , Michiya WATANABE , Yuji YAMAGISHI , Yasuhiro NISHIMURA
Abstract: A multilayer varistor includes a sintered body, a first external electrode, a second external electrode, a first internal electrode, a second internal electrode, and a high-resistivity portion. The first internal electrode is provided inside the sintered body and electrically connected to the first external electrode. The second internal electrode is provided inside the sintered body and electrically connected to the second external electrode. The high-resistivity portion includes: a surface high-resistivity portion provided to cover a surface of the sintered body; and an inner high-resistivity portion extended inward from the surface high-resistivity portion inside the sintered body.
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公开(公告)号：US20230274864A1
公开(公告)日：2023-08-31
申请号：US18173598
申请日：2023-02-23
Inventor： Yuto AKIYAMA , Ken YANAI , Masashi TAKAMURA , Yuji YAMAGISHI , Ryosuke USUI
Abstract: A multilayer varistor according to the present disclosure includes: a sintered compact having, on a surface thereof, at least one planar portion and at least one corner portion; an internal electrode provided inside the sintered compact; a high-resistivity layer arranged to cover the at least one planar portion and the at least one corner portion of the sintered compact at least partially; and an external electrode arranged to cover the high-resistivity layer partially and electrically connected to the internal electrode. The high-resistivity layer includes: a first high-resistivity layer covering the at least one planar portion; and a second high-resistivity layer covering the at least one corner portion. The first high-resistivity layer has a larger average thickness than the second high-resistivity layer.
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