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公开(公告)号：US20240331933A1
公开(公告)日：2024-10-03
申请号：US18618231
申请日：2024-03-27
Applicant: TDK Corporation
Inventor： Hokuto EDA , Takahiro Nemoto , Manabu Ohta , Ryo Fukuoka , Masazumi Arata , Hitoshi Ohkubo
CPC classification number: H01F27/324 , H01F5/06
Abstract: In the coil component, the edge of the aperture of the protection film covering the coil from the lower surface side of the element body does not extend in the same plane. In this case, even if a crack occurs in the joint region between the coil and the bump electrode, the crack is less likely to cross the joint region as compared with the case where the edge extends in the same plane. Therefore, in the coil component, the crack is effectively suppressed.
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公开(公告)号：US12094636B2
公开(公告)日：2024-09-17
申请号：US17234029
申请日：2021-04-19
Applicant: TDK CORPORATION
Inventor： Hokuto Eda , Masataro Saito , Kohei Takahashi , Takamasa Iwasaki , Hitoshi Ohkubo , Masazumi Arata
IPC: H01F27/32 , H01F27/255 , H01F27/28 , H01F27/29
CPC classification number: H01F27/2804 , H01F27/255 , H01F27/29 , H01F27/323 , H01F2027/2809
Abstract: In an insulation layer of a coil component, a thickness of a second covering part and a third covering part located on the penetration hole side of a first covering part is thinner than that of the first covering part. A stray capacitance occurring between a flat coil pattern and external terminal electrodes is reduced by making the first covering part of the insulation layer thicker than the second covering part and the third covering part. Further, since the second covering part and the third covering part of the insulation layers are thinner than the first covering part, a magnetic volume is increased while external dimensions of the base body is maintained, and thus a high inductance is realized.
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公开(公告)号：US11682507B2
公开(公告)日：2023-06-20
申请号：US16800299
申请日：2020-02-25
Applicant: TDK CORPORATION
Inventor： Kazuhiro Yoshidome , Hiroyuki Matsumoto , Hitoshi Ohkubo , Atsuyuki Nakano
CPC classification number: H01F1/147 , C22C38/002 , C22C38/02 , C22C38/12 , H01F1/15333 , H01F27/245 , H01F27/25 , C22C2202/02
Abstract: A coil component having high inductance while suppressing core loss is obtained. The coil component includes a coil and a magnetic core. The magnetic core has a laminated body in which soft magnetic layers are laminated. Micro gaps are formed in the soft magnetic layers. The soft magnetic layers are divided into at least two or more small pieces by the micro gaps. A structure made of Fe-based nano-crystals is observed in the soft magnetic layers.
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公开(公告)号：US11657949B2
公开(公告)日：2023-05-23
申请号：US16663464
申请日：2019-10-25
Applicant: TDK CORPORATION
Inventor： Kyohei Tonoyama , Ken Satoh , Kentaro Saito , Miyuki Asai , Hitoshi Ohkubo
CPC classification number: H01F27/255 , H01F17/0013 , H01F17/04 , H01F27/2804 , H01F27/292 , H01F27/324 , H01F2017/048 , H01F2027/2809
Abstract: A magnetic core and a coil component with excellent permeability, core loss, DC superimposition property, and withstand voltage. A magnetic core has a metal magnetic powder containing resin including a metal magnetic powder. The metal magnetic powder includes a large size powder, an intermediate size powder, and a small size powder. A particle size of the large size powder is 10 μm or more and 60 μm or less. A particle size of the intermediate size powder is 2.0 μm or more and less than 10 μm. A particle size of the small size powder is 0.1 μm or more and less than 2.0 μm. The large size powder includes a nano crystal. A ratio of the large size powder existing with respect to the metal magnetic powder is 39% or more and 91% or less in terms of an area ratio in a cross section of the magnetic core.
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公开(公告)号：US10147540B2
公开(公告)日：2018-12-04
申请号：US13848441
申请日：2013-03-21
Applicant: TDK CORPORATION
Inventor： Kyohei Tonoyama , Makoto Morita , Tomokazu Ito , Hitoshi Ohkubo , Manabu Ohta , Yoshihiro Maeda , Yuuya Kaname , Hideharu Moro
Abstract: In a planar coil element and a method for producing the same, a metal magnetic powder-containing resin containing an oblate or needle-like first metal magnetic powder contains a second metal magnetic powder having an average particle size (1 μm) smaller than that (32 μm) of the first metal magnetic powder, which significantly reduces the viscosity of the metal magnetic powder-containing resin. Therefore, the metal magnetic powder-containing resin is easy to handle when applied to enclose a coil unit, which makes it easy to produce the planar coil element.
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Patent Agency Ranking
6.发明授权公开(公告)号：US09406420B2
公开(公告)日：2016-08-02
申请号：US14018293
申请日：2013-09-04
Applicant: TDK Corporation
Inventor： Hitoshi Ohkubo , Kyohei Tonoyama , Makoto Morita , Tomokazu Ito , Hideto Itoh , Yoshihiro Maeda , Manabu Ohta , Yuuya Kaname , Takahiro Kawahara
IPC: H01F17/00 , H01F1/00 , B32B15/00 , G11B5/708 , H01F5/00 , H01F1/06 , H01F1/26 , H01F27/255 , H01F27/28 , H01F27/29
CPC classification number: H01F5/00 , H01F1/06 , H01F1/26 , H01F27/255 , H01F27/2804 , H01F27/292 , H01F2017/0066 , H01F2027/2809
Abstract: A coil component 1 is provided with coil conductors 10a and 10b and a magnetic metal powder containing resin 22 (22a and 22b) covering the coil conductors 10a and 10b. The magnetic metal powder containing resin 22 includes first metal powder having a first average grain diameter, second metal powder having a second average grain diameter that is smaller than the first average grain diameter, and third metal powder having a third average grain diameter that is smaller than the second average grain diameter. The first average grain diameter is 15 μm or more and 100 μm or less. The third average grain diameter is 2 μm or less. The first metal powder mainly contains Permalloy and the second and third metal powders mainly contain carbonyl iron.
Abstract translation: 线圈部件1设置有线圈导体10a，10b和覆盖线圈导体10a，10b的含有树脂22（22a，22b）的磁性金属粉末。 含有磁性金属粉末的树脂22包括具有第一平均粒径的第一金属粉末，具有小于第一平均粒径的第二平均粒径的第二金属粉末和具有比第一平均粒径小的第三平均粒径的第三金属粉末 比第二平均粒径。 第一平均粒径为15μm以上且100μm以下。 第三平均粒径为2μm以下。 第一种金属粉末主要含有坡莫合金，第二和第三种金属粉末主要含有羰基铁。
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公开(公告)号：US09142343B2
公开(公告)日：2015-09-22
申请号：US13935442
申请日：2013-07-03
Applicant: TDK Corporation
Inventor： Hitoshi Ohkubo , Tomokazu Ito , Hideto Itoh , Yoshihiro Maeda , Manabu Ohta , Yuuya Kaname , Takahiro Kawahara
CPC classification number: H01F27/2804 , H01F17/0033 , H01F27/022 , H01F27/255 , H01F27/29 , H01F27/292 , H01F2017/0073 , H01F2027/2809
Abstract: A coil component 1 includes a substrate 2, a planar spiral conductor 10a formed on a top surface 2t of the substrate 2, a lead conductor 11a connected to an outer peripheral end of the planar spiral conductor 10a, a dummy lead conductor 15a formed on the top surface of the substrate 2 and between an outermost turn of the planar spiral conductor 10a and an end 2X2 of the substrate 2 and free from an electrical connection with another conductor within the same plane, external electrodes 26a and 26b arranged in parallel with the top surface of the substrate 2, and a bump electrode 25a formed on a surface of the lead conductor 11a and connects the lead conductor 11a with the external electrode 26a. The external terminals 26a and 26b have a larger area than the bump electrodes 15a and 15b for securing a bonding strength.
Abstract translation: 线圈部件1包括基板2，形成在基板2的顶面2t上的平面状螺旋导体10a，与平面螺旋导体10a的外周端连接的引出导体11a， 基板2的上表面和平面螺旋导体10a的最外侧的一侧和基板2的端部2X2之间，并且与同一平面内的另一个导体没有电连接，与顶部平行布置的外部电极26a和26b 基板2的表面以及形成在引线导体11a的表面上的突起电极25a，并将引线导体11a与外部电极26a连接起来。 外部端子26a和26b具有比用于确保接合强度的凸块电极15a和15b更大的面积。
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公开(公告)号：US11705270B2
公开(公告)日：2023-07-18
申请号：US16877772
申请日：2020-05-19
Applicant: TDK CORPORATION
Inventor： Miyuki Asai , Hokuto Eda , Masazumi Arata , Hitoshi Ohkubo
IPC: H01F27/28 , H01F27/255 , H01F27/32
CPC classification number: H01F27/2804 , H01F27/255 , H01F27/324 , H01F2027/2809
Abstract: In a coil component, an uneven structure provided by an insulation layer and a resin wall contributes to extension of a contact area with respect to a magnetic body, so that an adhesive force with respect to the magnetic body is improved. In addition, the magnetic body protrudes downward toward an exposed region of the resin wall corresponding to a recessed portion in the uneven structure, a volume thereof is increased, and coil characteristics such as an inductance value are improved.
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公开(公告)号：US11521791B2
公开(公告)日：2022-12-06
申请号：US16877831
申请日：2020-05-19
Applicant: TDK CORPORATION
Inventor： Kenei Onuma , Masazumi Arata , Hitoshi Ohkubo
Abstract: An upper end portion and a lower end portion of a second magnetic portion of a coil component are further away from a coil than when a third part and a fifth part are not present. For this reason, a magnetic flux is unlikely to be concentrated in the upper end portion and the lower end portion of the second magnetic portion, so that magnetic saturation is unlikely to occur. Therefore, improvement of direct current superimposition characteristics is realized in the coil component.
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公开(公告)号：US08975997B2
公开(公告)日：2015-03-10
申请号：US13847079
申请日：2013-03-19
Applicant: TDK Corporation
Inventor： Kyohei Tonoyama , Makoto Morita , Tomokazu Ito , Hitoshi Ohkubo , Manabu Ohta , Yoshihiro Maeda , Yuuya Kaname , Hideharu Moro
CPC classification number: H01F27/255 , H01F17/0013 , H01F27/292 , H01F2017/048
Abstract: In a planar coil element, the quantitative ratio of inclined particles to total particles of a first metal magnetic powder contained in a metal magnetic powder-containing resin provided in a through hole of a coil unit is higher than the quantitative ratio of inclined particles to total particles of the first metal magnetic powder contained in the metal magnetic powder-containing resin provided in other than the through hole, and many of particles of the first metal magnetic powder in the magnetic core are inclined particles whose major axes are inclined with respect to the thickness direction and the planar direction of a substrate. Therefore, the planar coil element has improved strength as compared to a planar coil element shown in FIG. 9A and has improved magnetic permeability as compared to a planar coil element shown in FIG. 9B.
Abstract translation: 在平面线圈元件中，设置在线圈单元的通孔中的含金属磁性粉末的树脂中包含的第一金属磁粉的倾斜粒子与总粒子的定量比高于倾斜粒子与总体的定量比 除了通孔以外的金属磁性粉末的树脂中含有的第一金属磁性粉末的颗粒，磁芯中的第一金属磁性粉末的许多颗粒是倾斜的，其长轴相对于 厚度方向和基板的平面方向。 因此，与图1所示的平面线圈元件相比，平面线圈元件具有改善的强度。 与图9A所示的平面线圈元件相比，磁导率提高。 9B。
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