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公开(公告)号：US20240128004A1
公开(公告)日：2024-04-18
申请号：US18389615
申请日：2023-12-19
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Makoto HIRAKI , Katsuhisa IMADA , Morihiro HAMANO , Ryouji MIZOBATA
IPC: H01F17/00 , H01F27/255 , H01F27/28 , H01F27/32 , H01F41/04
CPC classification number: H01F17/0013 , H01F27/255 , H01F27/2804 , H01F27/32 , H01F41/046 , H01F2027/2809
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：US20230282406A1
公开(公告)日：2023-09-07
申请号：US18315734
申请日：2023-05-11
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kouhei MATSUURA , Morihiro HAMANO , Keiichi TSUDUKI
CPC classification number: H01F17/0013 , H01F41/041 , H01B3/12 , H05K3/4629 , H05K1/0306 , C04B35/00 , C03C3/04 , C04B2235/365 , H01F2017/0066 , H01F2017/002 , H01F2017/0093 , C04B2237/341
Abstract: An electronic component that has fewer cracks during production is provided. The electronic component includes an outer electrode on a multilayer body, which includes an inner glass layer, a magnetic material layer on top and bottom surfaces of the inner glass layer, and an outer glass layer on top and bottom surfaces of the magnetic material layer. The insulating layers of the inner glass layer and the outer glass layers contain a dielectric glass material that contains a glass material containing at least K, B, and Si, quartz, and alumina. The glass material content of each insulating layer of the inner glass layer ranges from approximately 60%-65% by weight, the quartz content of each insulating layer of the inner glass layer ranges from approximately 34%-37% by weight, and the alumina content of each insulating layer of the inner glass layer ranges from approximately 0.5%-4% by weight.
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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：US20190164677A1
公开(公告)日：2019-05-30
申请号：US16201971
申请日：2018-11-27
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kouhei MATSUURA , Morihiro HAMANO , Keiichi TSUDUKI
Abstract: An electronic component with a plurality of coil conductor layers laminated such that a coil conductor having a coil pattern on a surface of an insulation layer is formed on each of the plurality of coil conductor layers. The electronic component includes a laminated body in which a bottom face side extended electrode layer, a primary coil conductor layer including a primary coil conductor, a secondary coil conductor layer including a secondary coil conductor, a tertiary coil conductor layer including a tertiary coil conductor, a parallel primary coil conductor layer including a parallel primary coil conductor, and a top face side extended electrode layer are laminated in this order. The electronic component further includes first through sixth external electrodes on a surface of the laminated body, which are connected to the primary, secondary, tertiary and parallel primary coil conductors.
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公开(公告)号：US20190013130A1
公开(公告)日：2019-01-10
申请号：US16028717
申请日：2018-07-06
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Morihiro HAMANO , Keiichi TSUDUKI , Kouhei MATSUURA , Minoru MATSUNAGA
Abstract: A coil component includes a first magnetic body, an insulator stacked on the first magnetic body, a second magnetic body stacked on the insulator, a coil which is disposed in the insulator and which includes at least one coil conductor layer, and an internal magnetic body disposed within the inner circumference of the coil and connected to the first magnetic body and the second magnetic body. In a cross section in a stacking direction, the width of the internal magnetic body increases continuously from the first magnetic body side toward the second magnetic body side. Also, the inner circumferential surface of an end coil conductor layer located closest to the second magnetic body faces the outer circumferential surface of the internal magnetic body and is inclined in the same direction as the outer circumferential surface of the internal magnetic body with respect to the stacking direction.
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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：US20210166854A1
公开(公告)日：2021-06-03
申请号：US17084369
申请日：2020-10-29
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kouhei MATSUURA , Morihiro HAMANO
Abstract: A coil component includes an element body including a first glass layer, a first ferrite layer formed on a first main surface of the first glass layer, and a second ferrite layer formed on a second main surface of the first glass layer; a coil buried in the first glass layer; and an outer electrode disposed on a side surface of the element body so as to span the first ferrite layer, the first glass layer, and the second ferrite layer. On the side surface of the element body, the width of the outer electrode in the ferrite layer regions is larger than the width of the outer electrode in the glass layer region in plan view in the direction perpendicular to the side surface.
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公开(公告)号：US20200152365A1
公开(公告)日：2020-05-14
申请号：US16670916
申请日：2019-10-31
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kouhei MATSUURA , Morihiro HAMANO , Keiichi TSUDUKI
Abstract: An electronic component that has fewer cracks during production is provided. The electronic component includes an outer electrode on a multilayer body, which includes an inner glass layer, a magnetic material layer on top and bottom surfaces of the inner glass layer, and an outer glass layer on top and bottom surfaces of the magnetic material layer. The insulating layers of the inner glass layer and the outer glass layers contain a dielectric glass material that contains a glass material containing at least K, B, and Si, quartz, and alumina. The glass material content of each insulating layer of the inner glass layer ranges from approximately 60%-65% by weight, the quartz content of each insulating layer of the inner glass layer ranges from approximately 34%-37% by weight, and the alumina content of each insulating layer of the inner glass layer ranges from approximately 0.5%-4% by weight.
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公开(公告)号：US20200075221A1
公开(公告)日：2020-03-05
申请号：US16547475
申请日：2019-08-21
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Shimpei TANABE , Morihiro HAMANO
Abstract: A multilayer coil component includes an element body that includes a plurality of insulating layers laminated together, a coil that is embedded in the element body and that includes a coil conductor layer provided between the insulating layers, and a first outer electrode and a second outer electrode each of which is provided on at least one of outer surfaces of the element body and each of which is electrically connected to the coil. A dissimilar-material layer that is made of a material different from the insulating layers is provided on at least one of the outer surfaces of the element body that extend in a lamination direction in which the plurality of insulating layers are laminated together.
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