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

IPC: H01F27/32 ,  H01F5/06

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.

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.

公开(公告)号：US12068099B2

公开(公告)日：2024-08-20

申请号：US17109426

申请日：2020-12-02

Applicant: TDK CORPORATION

Inventor： Masataro Saito ,  Masazumi Arata ,  Hokuto Eda ,  Kohei Takahashi ,  Takamasa Iwasaki

IPC: H01F27/28 ,  H01F27/24 ,  H01F27/29

CPC classification number: H01F27/2804 ,  H01F27/24 ,  H01F27/29 ,  H01F2027/2809

Abstract: In a coil component, a first planar coil and a second planar coil are wound around a common magnetic core and are magnetically coupled to each other. However, the first planar coil and the second planar coil are not electrically connected to each other and form coil structures which are separate from each other. Thus, as compared with a case in which the first planar coil and the second planar coil form one coil structure, the first planar coil and the second planar coil are less likely to affect each other's characteristics.

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.

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

IPC: H01F27/32 ,  H01F27/28

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.

公开(公告)号：USD1053135S1

公开(公告)日：2024-12-03

申请号：US29821080

申请日：2021-12-27

Applicant: TDK CORPORATION

Designer： Hokuto Eda ,  Hitoshi Ohkubo ,  Masazumi Arata ,  Masataro Saito ,  Kohei Takahashi ,  Takamasa Iwasaki

公开(公告)号：US11043329B2

公开(公告)日：2021-06-22

申请号：US16027742

申请日：2018-07-05

Applicant: TDK CORPORATION

Inventor： Hitoshi Ohkubo ,  Masazumi Arata ,  Takahiro Kawahara ,  Hokuto Eda ,  Hiroki Tsujiai

IPC: H01F27/28 ,  H01F27/32 ,  H01F41/04 ,  H01F27/29 ,  H01F17/04 ,  H01F17/00 ,  H05K1/16 ,  H05K1/18

Abstract: 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.

公开(公告)号：US10283247B2

公开(公告)日：2019-05-07

申请号：US15213962

申请日：2016-07-19

Applicant: TDK CORPORATION

Inventor： Yuusuke Nagai ,  Masazumi Arata ,  Kenji Komorita ,  Yoshimitsu Satoh

IPC: H01F17/00

Abstract: In a multilayer coil component, even when both pairs of ends of a first coil part and a second coil part are located at the same positions when viewed from the laminated direction and have the same shapes, a connecting part is connected only to a second end of the first coil part on the upper side in the laminated direction, and is connected only to a first end of the second coil part on the lower side in the laminated direction. Thus, a coil wound around along the laminated direction is structured without misaligning the positions of respective connecting parts. Consequently, the entire shapes of the respective coil parts can be designed to be the exact same shape, which makes it possible to reduce the number of types of coil part, saving labor and time for preparing many types of conductor patterns like the conventional type.

公开(公告)号：US20240331905A1

公开(公告)日：2024-10-03

申请号：US18617849

申请日：2024-03-27

Applicant: TDK Corporation

Inventor： Manabu OHTA ,  Ryo Fukuoka ,  Yuji Matsuura ,  Hokuto Eda ,  Takahiro Nemoto ,  Kenei Onuma ,  Masazumi Arata ,  Hitoshi Ohkubo

IPC: H01F5/04 ,  H01F27/29

CPC classification number: H01F5/04 ,  H01F27/292

Abstract: In the coil component, the terminal electrode enters an aperture of the element body and is jointed with the bump electrode inside the element body. That is, the terminal electrode is in contact with both the bump electrode and the element body. Therefore, as compared with the case where the bump electrode is exposed to the lower surface of the element body, a joint surface of the terminal electrode is enlarged, and high adhesion of the terminal electrode is realized.

公开(公告)号：US12020854B2

公开(公告)日：2024-06-25

申请号：US17115311

申请日：2020-12-08

Applicant: TDK CORPORATION

Inventor： Hitoshi Ohkubo ,  Miyuki Asai ,  Masazumi Arata ,  Hokuto Eda

IPC: H01F27/32 ,  H01F17/04

CPC classification number: H01F27/324 ,  H01F17/04 ,  H01F2017/048

Abstract: In a coil component, the pressure resistance is improved by main surfaces and of a main body portion being covered with an insulating layer. The main body portion has a surface part, the resin ratio of the surface part is higher than the internal resin ratio, and insulation is enhanced at the surface part. As a result, the pressure resistance on the surface of the main body portion is further improved and the pressure resistance of the entire coil component is further improved.