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公开(公告)号：US11183320B2
公开(公告)日：2021-11-23
申请号：US16663514
申请日：2019-10-25
申请人： TDK CORPORATION
发明人： Kyohei Tonoyama , Ken Satoh , Kentaro Saito , Miyuki Asai , Hitoshi Ohkubo
摘要： A magnetic core includes a metal magnetic powder, which has 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, the intermediate size powder, and the small size powder have an insulation coating. When A1 represents an average insulation coating thickness of the large size powder, A2 represents an average insulation coating thickness of the intermediate size powder, A3 represents an average insulation coating thickness of the small size powder, A3 is 30 nm or more and 100 nm or less, A3/A1≥1.3, and A3/A2≥1.0.
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公开(公告)号：US10943719B2
公开(公告)日：2021-03-09
申请号：US16877944
申请日：2020-05-19
申请人： TDK CORPORATION
发明人： Miyuki Asai , Hokuto Eda , Masazumi Arata , Hitoshi Ohkubo
摘要： In a coil component, an insulation layer covers an upper surface of a conductor pattern. Accordingly, insulating properties between the conductor pattern and a magnetic body are enhanced, and insulating properties between the conductor patterns are enhanced. In addition, in the coil component, the magnetic body enters a space between resin walls such that the insulation layer is covered. Therefore, a volume of the magnetic body above the conductor pattern is increased, and high coil characteristics are realized.
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公开(公告)号：US10559417B2
公开(公告)日：2020-02-11
申请号：US15166519
申请日：2016-05-27
申请人： TDK CORPORATION
发明人： Hitoshi Ohkubo , Masazumi Arata , Manabu Ohta , Yuuya Kaname , Yoshihiro Maeda , Takahiro Kawahara , Hokuto Eda , Shigeki Sato
摘要： A coil component in which a change in thicknesses of the winding part is prevented is provided. According to the coil component, since each of a pair of neighboring resin walls and a seed part between the pair of resin walls are separated by a predetermined distance, a plating part grown on the seed part is easy to grow uniformly between the pair of neighboring resin walls. For this reason, the winding part whose surface is gentle and in which a change in thickness is prevented is obtained by plating growth.
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公开(公告)号：US10210974B2
公开(公告)日：2019-02-19
申请号：US14952028
申请日：2015-11-25
申请人： TDK CORPORATION
发明人： Hitoshi Ohkubo , Masazumi Arata , Manabu Ohta , Shou Kawadahara , Yoshihiro Maeda , Takahiro Kawahara , Hokuto Eda , Shigeki Sato
摘要： In a coil component (planar coil element), at least part of a third metal magnetic powder constituting a metal magnetic powder and having a minimum average grain diameter is uncoated, which suppresses a reduction in magnetic permeability. On the other hand, the remaining metal powders are coated with glass, which improves the insulating properties of a metal magnetic powder-containing resin and reduces core loss.
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公开(公告)号：US11894174B2
公开(公告)日：2024-02-06
申请号：US17093808
申请日：2020-11-10
申请人： TDK CORPORATION
发明人： Hitoshi Ohkubo , Manabu Ohta , Ryo Fukuoka , Hironori Kimata
CPC分类号： H01F17/04 , H01F27/2804 , H01F2017/048
摘要： In a coil component, a height h1 of a pedestal portion of a resin wall corresponds to the height position of a step portion. In addition, a height of a seed portion corresponds to the plating start position at a time when a winding portion of a coil is plated and grown. The plating start position and the step portion are designed to be close to each other by the height h1 of the pedestal portion and the height h2 of the seed portion satisfying 0.3≤h1/h2≤10. Accordingly, although the coil component has a configuration in which the resin wall has the step portion, the inside of the step portion is sufficiently filled with a coil conductor, and thus deterioration of characteristics is suppressed.
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公开(公告)号：US11680307B2
公开(公告)日：2023-06-20
申请号：US17502323
申请日：2021-10-15
申请人： TDK CORPORATION
发明人： Kyohei Tonoyama , Ken Satoh , Kentaro Saito , Miyuki Asai , Hitoshi Ohkubo
IPC分类号： C22C38/12 , H01F1/20 , C22C38/16 , C22C38/00 , H01F1/24 , C22C38/08 , B22F1/05 , B22F1/16 , B22F1/052 , B22F1/07
CPC分类号： C22C38/12 , B22F1/05 , B22F1/052 , B22F1/07 , B22F1/16 , C22C38/002 , C22C38/005 , C22C38/08 , C22C38/16 , H01F1/20 , H01F1/24 , B22F2301/355 , B22F2304/10
摘要： A magnetic core includes a metal magnetic powder, which has 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, the intermediate size powder, and the small size powder have an insulation coating. When A1 represents an average insulation coating thickness of the large size powder, A2 represents an average insulation coating thickness of the intermediate size powder, A3 represents an average insulation coating thickness of the small size powder, A3 is 30 nm or more and 100 nm or less, A3/A1≥1.3, and A3/A2≥1.0.
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公开(公告)号：US11049641B2
公开(公告)日：2021-06-29
申请号：US15363938
申请日：2016-11-29
申请人： TDK Corporation
发明人： Hitoshi Ohkubo , Kyohei Tonoyama , Shigeki Sato
IPC分类号： H01F5/00 , H01F27/255 , H01F17/00 , H01F17/04 , H01F27/02 , H01F27/28 , H01F27/29 , H01F27/32 , H01F27/42
摘要： A coil device comprising a coil, and a magnetic metal powder containing resin covering said coil. Said magnetic metal powder comprises at least two types of magnetic metal powders with different D50. The magnetic metal powder having larger D50 is defined as a large diameter powder, and the magnetic metal powder having smaller D50 is defined as a small diameter powder among the two types of said magnetic metal powder. Said large diameter powder is made of iron or iron based alloy. Said small diameter powder is made of Ni—Fe alloy. Said small diameter powder has D50 of 0.5 to 1.5 μm. Said large diameter powder and said small diameter powder respectively comprises an insulation coating layer.
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公开(公告)号：US11043329B2
公开(公告)日：2021-06-22
申请号：US16027742
申请日：2018-07-05
申请人： TDK CORPORATION
摘要： In a planar coil element, a dead space in a non-overlapping region is reduced by designing a total width of a first resin wall and a first turn located in the non-overlapping region to be narrow, more specifically, by designing the total width to be narrower than a total width of a second turn outside the first turn and a second resin wall located inside the turn and also than a total width of a third turn on the outer side and a third resin wall located inside the turn. As a result, a volume of a magnetic element body in a magnetic core portion of a coil can be increased, and an, inductance value, which is a magnetic characteristic, can also be improved.
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公开(公告)号：US09349522B2
公开(公告)日：2016-05-24
申请号：US14831761
申请日：2015-08-20
申请人： TDK Corporation
发明人： Hitoshi Ohkubo , Tomokazu Ito , Hideto Itoh , Yoshihiro Maeda , Manabu Ohta , Yuuya Kaname , Takahiro Kawahara , Takashi Nakagawa
CPC分类号： H01F27/2804 , H01F17/0033 , H01F27/022 , H01F27/255 , H01F27/29 , H01F27/292 , H01F2017/0073 , H01F2027/2809
摘要： A coil component includes a substrate, a planar spiral conductor formed on a top surface of the substrate, a lead conductor connected to an outer peripheral end of the planar spiral conductor, a dummy lead conductor formed on the top surface of the substrate between an outermost turn of the planar spiral conductor and an end of the substrate and free from an electrical connection with another conductor within the same plane, external electrodes and arranged in parallel with the top surface of the substrate, and a bump electrode formed on a surface of the lead conductor and connects the lead conductor with the external electrode. The external terminals have a larger area than the bump electrodes for securing a bonding strength.
摘要翻译： 线圈部件包括基板，形成在基板的上表面的平面螺旋导体，与平面螺旋导体的外周端连接的引线导体，形成在基板的上表面之间的最外侧 平面螺旋导体和基板的端部的转动，并且与同一平面内的另一个导体和外部电极的电连接没有电连接，并且与基板的顶表面平行布置，并且凸起电极形成在基板的表面上 引线导体，并将引线导体与外部电极连接。 外部端子具有比用于确保接合强度的凸块电极更大的面积。
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30.发明申请公开(公告)号：US20140077914A1
公开(公告)日：2014-03-20
申请号：US14018293
申请日：2013-09-04
申请人： TDK Corporation
发明人： Hitoshi Ohkubo , Kyohei Tonoyama , Makoto Morita , Tomokazu Ito , Hideto Itoh , Yoshihiro Maeda , Manabu Ohta , Yuuya Kaname , Takahiro Kawahara
CPC分类号： H01F5/00 , H01F1/06 , H01F1/26 , H01F27/255 , H01F27/2804 , H01F27/292 , H01F2017/0066 , H01F2027/2809
摘要： 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.
摘要翻译： 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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