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公开(公告)号：US20200033428A1
公开(公告)日：2020-01-30
申请号：US16510613
申请日：2019-07-12
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Keiichi YOSHINAKA , Katsuhisa IMADA , Mitsuhiro SATO , Ryohei KAWABATA
IPC: G01R33/36 , G01R33/341
Abstract: A coil array component including an element assembly that includes a filler and a resin material, a first coil portion and a second coil portion that are embedded in the element assembly and that are composed of a first coil conductor and a second coil conductor, respectively, and four outer electrodes electrically connected to the first coil portion and the second coil portion. Also, four extension electrodes that extend from end surfaces of the element assembly to the bottom surface and are electrically connected to the outer electrodes on the bottom surface are further included. In addition, the extension electrodes are covered with insulating layers on end surfaces of the element assembly.
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公开(公告)号：US20190311842A1
公开(公告)日：2019-10-10
申请号：US16373548
申请日：2019-04-02
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Katsuhisa IMADA , Keiichi YOSHINAKA , Keishiro AMAYA , Hiroyuki KANBARA
Abstract: A coil component including an element assembly that contains a filler and a resin material, a coil portion composed of a coil conductor that is embedded in the element assembly, and a pair of outer electrodes electrically connected to the coil conductor. Also, the coil conductor is covered with a glass layer.
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公开(公告)号：US20250132083A1
公开(公告)日：2025-04-24
申请号：US19005899
申请日：2024-12-30
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Yuudai SUZUKI , Katsuhisa IMADA , Makoto HIRAKI , Ikuno SUGIYAMA , Hiroshi UEKI
Abstract: A laminated coil component includes a multilayer body in which a coil, which is obtained by electrically connecting a plurality of coil conductors with a via conductor interposed therebetween, is provided in an inside of an insulator portion which is obtained by laminating a plurality of insulation layers. Each of a first coil conductor and a second coil conductor that are adjacent to each other in a lamination direction and are electrically connected in series with a first via conductor interposed therebetween includes a first main surface that faces the opposite direction to the lamination direction and on which a void exists. The second coil conductor includes a second main surface that faces the lamination direction and on which another void exists, and the other void locally exists on a position opposed to the first via conductor.
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公开(公告)号：US20210249189A1
公开(公告)日：2021-08-12
申请号：US17169255
申请日：2021-02-05
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Ryouji MIZOBATA , Makoto HIRAKI , Katsuhisa IMADA , Morihiro HAMANO
Abstract: A method for producing a multilayer coil component includes preparing an insulating sheet; forming a resin paste layer on the insulating sheet by using a resin paste; forming a conductive paste layer by using a conductive paste, the conductive paste layer covering the resin paste layer and having a projecting portion at a portion where a second void portion is to be formed; forming an insulating paste layer on the insulating sheet by using an insulating paste such that at least part of an upper surface of the conductive paste layer is exposed; stacking the insulating sheets having the resin paste layer, the conductive paste layer, and the insulating paste layer formed thereon to form a multilayer compact that includes the conductive paste layers connected into a coil shape; and firing the multilayer compact.
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公开(公告)号：US20210287842A1
公开(公告)日：2021-09-16
申请号：US17196924
申请日：2021-03-09
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Makoto HIRAKI , Ryohei KAWABATA , Katsuhisa IMADA
Abstract: A multilayer coil component includes a multilayer body that includes insulating layers that are stacked; a coil disposed in the multilayer body; and outer electrodes disposed on surfaces of the multilayer body and electrically connected to the coil. The coil includes at least two coil conductor groups that each include at least two coil conductors connected to each other in parallel through two coupling conductors. The at least two coil conductor groups are connected to each other in series through a connecting conductor. The connecting conductor connects the coil conductor between the two coupling conductors in one of the at least two coil conductor groups to the coil conductor between the two coupling conductors in another one of the at least two coil conductor groups.
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Patent Agency Ranking
公开(公告)号：US20210249178A1
公开(公告)日：2021-08-12
申请号：US17168020
申请日：2021-02-04
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Katsuhisa IMADA , Morihiro HAMANO , Makoto HIRAKI , Ryouji MIZOBATA
Abstract: A highly reliable multilayer coil component, in which the difference in shrinkage ratio between an insulator portion and a conductor portion during firing can be reduced, includes an insulator portion; a coil that is embedded in the insulator portion and includes a plurality of coil conductor layers electrically connected to one another; and outer electrodes that are disposed on surfaces of the insulator portion and are electrically connected to the coil. The coil conductor layers that are adjacent to each other in a stacking direction are connected to each other through a via conductor and a connecting conductor, and the connecting conductor has a pore area ratio smaller than a pore area ratio of the coil conductor layers.
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公开(公告)号：US20210249172A1
公开(公告)日：2021-08-12
申请号：US17169131
申请日：2021-02-05
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Makoto HIRAKI , Katsuhisa IMADA , Morihiro HAMANO , Ryouji MIZOBATA
IPC: H01F17/00 , H01F27/28 , H01F41/04 , H01F27/255 , H01F27/32
Abstract: A highly reliable multilayer coil component in which the internal stress is further alleviated, and a method for producing the same. The method produces a multilayer coil component that includes an insulator portion, a coil that is embedded in the insulator portion and includes a plurality of coil conductor layers electrically connected to one another, and an outer electrode that is disposed on a surface of the insulator portion and is electrically connected to an extended portion of the coil. The method includes forming a conductive paste layer by using a conductive paste; forming an insulating paste layer by using an insulating paste; forming a multilayer compact that includes the conductive paste layer and the insulating paste layer; and firing the multilayer compact, in which the conductive paste has a PVC of 60% or more and 80% or less (i.e., from 60% to 80%).
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公开(公告)号：US20220189674A1
公开(公告)日：2022-06-16
申请号：US17548405
申请日：2021-12-10
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Yuudai SUZUKI , Katsuhisa IMADA , Makoto HIRAKI , Ikuno SUGIYAMA , Hiroshi UEKI
Abstract: A laminated coil component includes a multilayer body in which a coil, which is obtained by electrically connecting a plurality of coil conductors with a via conductor interposed therebetween, is provided in an inside of an insulator portion which is obtained by laminating a plurality of insulation layers. Each of a first coil conductor and a second coil conductor that are adjacent to each other in a lamination direction and are electrically connected in series with a first via conductor interposed therebetween includes a first main surface that faces the opposite direction to the lamination direction and on which a void exists. The second coil conductor includes a second main surface that faces the lamination direction and on which another void exists, and the other void locally exists on a position opposed to the first via conductor.
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公开(公告)号：US20210272733A1
公开(公告)日：2021-09-02
申请号：US17184370
申请日：2021-02-24
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Makoto HIRAKI , Katsuhisa IMADA
Abstract: A coil component in which stress inside thereof is alleviated and the DC resistance is low. A multilayer coil component includes an element body that includes an insulator portion and a coil embedded in the insulator portion; and outer electrodes disposed on surfaces of the insulator portion and electrically connected to ends of the coil. There is a groove-shaped void portion at a boundary between the coil and the insulator portion, and the void portion extends in a length direction of the coil. The coil has a ridge in the void portion, and the ridge extends in the length direction of the coil.
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公开(公告)号：US20190214188A1
公开(公告)日：2019-07-11
申请号：US16245060
申请日：2019-01-10
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Katsuhisa IMADA
CPC classification number: H01F27/29 , H01F27/24 , H01F27/2804 , H01F2027/2809
Abstract: A multilayer coil component includes a body including laminated ferrite layers, a coil conductor including conductive layers laminated in the body, and a pair of outer electrodes. Each of the outer electrodes is electrically connected to a corresponding one of end portions of the coil conductor. At least one of the conductive layers has a constricted portion at an end portion thereof. Each of the conductive layers includes a first conductive layer and a second conductive layer. The first conductive layer has a thickness different from the second conductive layer.
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