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公开(公告)号：US20230420172A1
公开(公告)日：2023-12-28
申请号：US18367503
申请日：2023-09-13
Applicant: TDK CORPORATION
Inventor： Hidekazu SATO , Takahiro SATO , Hitoshi KUDO , Takashi ENDO , Yusuke NAGAI , Tatsuro SUZUKI , Hiroko KORIKAWA , Kenji KOMORITA
CPC classification number: H01F17/0013 , H01F17/04 , H01F41/046 , H01F27/2804 , H01F5/003 , H01F27/292
Abstract: A multilayer coil component includes an element body having a multilayer structure including a first element body portion formed of a ferrite element body material, and a second element body portion laminated on the first element body portion and formed of a ferrite element body material having a composition different from the ferrite element body material forming the first element body portion, a multilayer coil having an axis parallel to a lamination direction of the element body, and a stress alleviation portion provided in an inner region of the multilayer coil when viewed from the lamination direction. In the multilayer coil component, the stress alleviation portion is provided in the inner region of the multilayer coil in which a stress tends to be concentrated to alleviate the stress in the inner region of the multilayer coil, and thereby occurrence of cracking in the element body can be suppressed.
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公开(公告)号：US20190198232A1
公开(公告)日：2019-06-27
申请号：US16227112
申请日：2018-12-20
Applicant: TDK CORPORATION
Inventor： Takahiro SATO , Hitoshi KUDO , Takashi SUZUKI , Kouichi KAKUDA , Tatsuro SUZUKI , Hiroyuki TANOUE
CPC classification number: H01F27/292 , H01F1/344 , H01F27/2804 , H01F41/041 , H01F2027/2809
Abstract: In a multilayer coil component, a ferrite element body includes a first element body portion and a second element body portion adjacent to each other in an axial direction of the multilayer coil, in which a dielectric constant of the second element body portion is lower than a dielectric constant of the first element body portion, and a magnetic permeability of the second element body portion is higher than a magnetic permeability of the first element body portion. The inventors newly found that the first element body portion and the second element body portion contribute to coil characteristics when a coil winding portion is provided to extend over the first element body portion and the second element body portion. In the multilayer coil component, desired coil characteristics can be obtained by adjusting proportions of the first element body portion and the second element body portion in the ferrite element body.
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公开(公告)号：US20190198227A1
公开(公告)日：2019-06-27
申请号：US16227167
申请日：2018-12-20
Applicant: TDK CORPORATION
Inventor： Takahiro SATO , Hitoshi KUDO , Takashi SUZUKI , Kouichi KAKUDA , Tatsuro SUZUKI , Hiroyuki TANOUE
CPC classification number: H01F27/2804 , H01F1/344 , H01F2027/2809
Abstract: The inventors have newly found that, even when a composition of a first element body portion and a composition of a second element body portion are different from each other, a high bonding strength at an interface between the first element body portion and the second element body portion can be obtained when both the first element body portion and the second element body portion contain Zn2SiO4 as a constituent component. That is, when the first element body portion and the second element body portion contain Zn2SiO4, a bonding strength at the interface is improved compared to a case in which the first element body portion and the second element body portion do not contain Zn2SiO4.
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公开(公告)号：US20140177131A1
公开(公告)日：2014-06-26
申请号：US14106042
申请日：2013-12-13
Applicant: TDK CORPORATION
Inventor： Iwao MIURA , Hitoshi KUDO , Masato SAKAKIBARA
IPC: H01G4/224
Abstract: A high voltage capacitor comprises a columnar capacitor element body, made of a dielectric material, having a pair of principal surfaces opposing each other; a pair of electrodes arranged on the respective principal surfaces; a pair of terminal metal fittings connected to the respective electrodes; a case; and a resin part. The case contains a resin material and has a bottom part formed with an opening for exposing the terminal metal fitting and a trunk part extending from an edge of the bottom part in a direction intersecting the bottom part. The bottom part and trunk part define a space for containing the capacitor element body. The resin part is made of an insulating material and arranged within the case so as to seal the capacitor element body within the case. The case has a degree of hardness lower than that of the resin part.
Abstract translation: 高电压电容器包括柱状电容器元件主体，由电介质材料制成，具有彼此相对的一对主表面; 布置在各个主表面上的一对电极; 连接到各个电极的一对端子金属配件; 一个案例; 和树脂部分。 壳体包含树脂材料，并且具有形成有露出终端金属配件的开口的底部和从底部的边缘沿与底部相交的方向延伸的主干部分。 底部和主体部分限定用于容纳电容器元件主体的空间。 树脂部分由绝缘材料制成并且布置在壳体内以将电容器元件主体密封在壳体内。 该情况的硬度比树脂部的硬度低。
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