公开(公告)号：US20240136116A1

公开(公告)日：2024-04-25

申请号：US18490358

申请日：2023-10-18

Applicant: TDK CORPORATION

Inventor： Hokuto EDA ,  Masataro SAITO ,  Kohei TAKAHASHI ,  Takamasa IWASAKI ,  Hiroki ASAFUSA ,  Takahiro NEMOTO

IPC: H01F27/29 ,  H01F27/28 ,  H01F27/30

CPC classification number: H01F27/292 ,  H01F27/2804 ,  H01F27/306

Abstract: Since the coil body of the coil component includes a plurality of coils and the first coil is one of the plurality of coils included in the coil body, the current route from the external terminal of the first to the outer peripheral turn of the second coil portion where stray capacitance occurs is significantly shorter than the route of current flowing between the pair of external terminals, and the voltage drop in the outer peripheral turn of the second coil portion is relatively small, so that stray capacitance between the second coil portion and the first external terminal is small.

公开(公告)号：US20240136109A1

公开(公告)日：2024-04-25

申请号：US18490293

申请日：2023-10-18

Applicant: TDK CORPORATION

Inventor： Hokuto EDA ,  Masataro SAITO ,  Kohei TAKAHASHI ,  Takamasa IWASAKI ,  Hiroki ASAFUSA ,  Takahiro NEMOTO

IPC: H01F27/28

CPC classification number: H01F27/2852

Abstract: The coil body of the coil component includes a first coil, a second coil, and a third coil arranged in order along one direction when viewed from the facing direction of the pair of main surfaces of the element body. The first coil, the second coil, and the third coil have alternating winding directions, and the number of turns of the second coil is relatively small, thereby improving the characteristics of the coil component.

公开(公告)号：US20230063586A1

公开(公告)日：2023-03-02

申请号：US17898767

申请日：2022-08-30

Applicant: TDK CORPORATION

Inventor： Hokuto EDA ,  Hitoshi OHKUBO ,  Masazumi ARATA ,  Masataro SAITO ,  Kohei TAKAHASHI ,  Takamasa IWASAKI

IPC: H01F1/14 ,  H01F5/04 ,  H01F5/06

Abstract: Since the magnetic sheet is adopted as the coil component, magnetic saturation is likely to occur in the magnetic sheet, and it is considered that the DC superimposition characteristic of the coil component is deteriorated. However, since the inner edge of the coil structure backs down with respect to the inner edge of the magnetic sheet so that the magnetic flux generated in the coil easily circulates, the deterioration of the DC superimposition characteristics due to the adoption of the magnetic sheet is suppressed.

公开(公告)号：US20210327641A1

公开(公告)日：2021-10-21

申请号：US17233790

申请日：2021-04-19

Applicant: TDK CORPORATION

Inventor： Hokuto EDA ,  Masataro SAITO ,  Kohei TAKAHASHI ,  Takamasa IWASAKI

IPC: H01F27/28 ,  H01F27/255

Abstract: In a coil component, a stray capacitance may occur between a conducting wires of an upper layer and a conducting wires of a lower layer arranged in the vertical direction due to the potential difference between them. In the coil component, a separation distance between the conducting wire of the upper layer and the conducting wire of the lower layer is designed to be longer than twice a thickness of an insulation coating of a portion covering a side surface of the conducting wire, and a sufficiently long distance is secured, and thus the stray capacitance is reduced.

公开(公告)号：US20210193369A1

公开(公告)日：2021-06-24

申请号：US17126323

申请日：2020-12-18

Applicant: TDK CORPORATION

Inventor： Masataro SAITO ,  Masazumi ARATA ,  Hokuto EDA ,  Kohei TAKAHASHI ,  Takamasa IWASAKI

IPC: H01F27/28 ,  H01F27/255 ,  H01F27/32

Abstract: In a coil component, a non-magnetic part is bridged between a first coil and a second coil in a cross section of an element body. Therefore, a magnetic flux in a direction along a magnetic core of the first coil and a magnetic core of the second coil is hindered by the non-magnetic part between the first coil and the second coil. Accordingly, a magnetic flux of the first coil and a magnetic flux of the second coil are difficult to interfere with each other.

公开(公告)号：US20210166859A1

公开(公告)日：2021-06-03

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 ,  H01F27/29 ,  H01F27/24

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：US20230066655A1

公开(公告)日：2023-03-02

申请号：US17892939

申请日：2022-08-22

Applicant: TDK CORPORATION

Inventor： Hokuto EDA ,  Hitoshi OHKUBO ,  Masazumi ARATA ,  Masataro SAITO ,  Kohei TAKAHASHI ,  Takamasa IWASAKI ,  Manabu OHTA ,  Kenei ONUMA

IPC: H01F27/29 ,  H01F27/32

Abstract: In the coil component, since the contact area between the external terminal electrode and the element body is increased by the protrusion of the external terminal electrode, the external terminal electrode and the element body are more closely attached to each other. Therefore, the attachment strength between the external terminal electrode and the element body can be improved. Hence, it is possible to suppress peeling of the external terminal electrode from the element body.

公开(公告)号：US20230063602A1

公开(公告)日：2023-03-02

申请号：US17898729

申请日：2022-08-30

Applicant: TDK CORPORATION

Inventor： Hokuto EDA ,  Hitoshi OHKUBO ,  Masazumi ARATA ,  Masataro SAITO ,  Kohei TAKAHASHI ,  Takamasa IWASAKI

IPC: H01F1/14 ,  H01F5/06 ,  H01F5/04

Abstract: In the coil component, the coupling coefficient can be adjusted by the magnetic sheet and the insulator interposed between the pair of coils. For example, by increasing the magnetic permeability of the magnetic sheet so that the magnetic flux generated in the coil easily passes through the magnetic sheet, the coupling coefficient decreases. In the coil component, the coupling coefficient can be adjusted while the thickness of the element body is suppressed.

公开(公告)号：US20230023284A1

公开(公告)日：2023-01-26

申请号：US17867361

申请日：2022-07-18

Applicant: TDK CORPORATION

Inventor： Hokuto EDA ,  Hitoshi OHKUBO ,  Masazumi ARATA ,  Masataro SAITO ,  Kohei TAKAHASHI ,  Takamasa IWASAKI

IPC: H01F27/29 ,  H01F27/32 ,  H01F27/02

Abstract: In a coil component, fixing strength of an external terminal is improved. In the coil component, on the end face of the element body, the center position of the external terminal electrode in the first direction is biased toward the center position of the end face with respect to the center position of the outer end portion. Therefore, the fixing area between the external terminal electrode and the element body is increased on the center position side of the end face, and thus fixing strength between the external terminal electrode and the element body is improved.

公开(公告)号：US20230022095A1

公开(公告)日：2023-01-26

申请号：US17866860

申请日：2022-07-18

Applicant: TDK CORPORATION

Inventor： Hokuto EDA ,  Hitoshi OHKUBO ,  Masazumi ARATA ,  Masataro SAITO ,  Kohei TAKAHASHI ,  Takamasa IWASAKI

IPC: H01F27/28 ,  H01F27/32 ,  H01F27/29 ,  H01F27/02

Abstract: In a coil component, coupling coefficient is improved. In the coil component, the coupling position between the outer end portion of the first planar coil and the first lead-out portion is biased toward the second lead-out portion with respect to the center line of the first lead-out portion, whereby the length of the second planar coil not alongside with the outermost turn of the first planar coil is shortened. By shortening the length of the second planar coil, the coupling coefficient between the first coil portion and the second coil portion is increased.