公开(公告)号：US12142415B2

公开(公告)日：2024-11-12

申请号：US17512790

申请日：2021-10-28

Applicant: TDK CORPORATION

Inventor： Kyosuke Inui ,  Yuichi Oyanagi ,  Toru Tonogai ,  Toshiyuki Anbo

IPC: H01F5/00 ,  H01F17/04 ,  H01F27/29

Abstract: A coil device including: a core containing magnetic particles and a resin component; a coil including a conductor having a coil shape; and a terminal electrode formed on a part of an outer surface of the core and electrically connected to an end of the conductor drawn from the coil. The terminal electrode includes a first electrode layer in contact with the end of the conductor and a second electrode layer located outside the first electrode layer. The first electrode layer and the second electrode layer both include conductive powder and resin, and a content of the resin in the second electrode layer is higher than a content of the resin in the first electrode layer.

公开(公告)号：US11664150B2

公开(公告)日：2023-05-30

申请号：US16840948

申请日：2020-04-06

Applicant: TDK CORPORATION

Inventor： Toru Tonogai ,  Yuichi Oyanagi ,  Kyosuke Inui ,  Maki Mannen

IPC: H01F27/28 ,  H01F27/255 ,  H01F27/29 ,  H01F41/12 ,  H01F17/04

CPC classification number: H01F27/2828 ,  H01F17/04 ,  H01F27/255 ,  H01F27/29 ,  H01F41/127 ,  H01F2017/048

Abstract: Disclosed herein is a coil component that includes a magnetic element body, a coil conductor embedded in the magnetic element body and having an end portion exposed from the magnetic element body, and a terminal electrode connected to the end portion of the coil conductor. The terminal electrode includes a conductive resin contacting the end portion of the coil conductor and containing conductive particles and a resin material, and a metal film covering the conductive resin. The conductive resin including a first conductive resin contacting the end portion of the coil conductor, and a second conductive resin contacting the metal film without contacting the end portion of the coil conductor. A specific surface area of the conductive particles contained in the first conductive resin is larger than that of a conductive particles contained in the second conductive resin.

公开(公告)号：US12230434B2

公开(公告)日：2025-02-18

申请号：US17320380

申请日：2021-05-14

Applicant: TDK CORPORATION

Inventor： Kyosuke Inui ,  Toru Tonogai ,  Yuichi Oyanagi

IPC: H01F17/04 ,  H01F27/29 ,  H01F27/28 ,  H01F41/06

Abstract: An electronic component according to the present invention includes: an element body containing metal particles and a resin; and a resin electrode layer formed on an electrode facing portion which is a part of an outer surface of the element body. The resin electrode layer contains a resin component and a conductor powder. In addition, the electrode facing portion includes an exposed portion formed by removing the resin on an outermost surface of the element body to expose a part of an outer periphery of the metal particles located on the outermost surface. Then, the resin electrode layer and the exposed portion of the electrode facing portion are joined to each other.

公开(公告)号：US11676755B2

公开(公告)日：2023-06-13

申请号：US16841225

申请日：2020-04-06

Applicant: TDK CORPORATION

Inventor： Toru Tonogai ,  Yuichi Oyanagi ,  Kyosuke Inui ,  Maki Mannen

IPC: H01F27/29 ,  H01F27/32 ,  H01F27/255

CPC classification number: H01F27/29 ,  H01F27/255 ,  H01F27/32

Abstract: Disclosed herein is a coil component that includes a magnetic element body, a coil conductor embedded in the magnetic element body and having an end portion exposed from the magnetic element body, and a terminal electrode connected to the end portion of the coil conductor. The terminal electrode includes a conductive resin contacting the end portion of the coil conductor and containing conductive particles and a resin material, and a metal film covering the conductive resin. The end portion of the coil conductor has an exposed surface exposed from the magnetic element body and contacting the conductive resin and a non-exposed surface covered with the magnetic element body. The exposed surface is larger in surface roughness than the non-exposed surface.

公开(公告)号：US20210358682A1

公开(公告)日：2021-11-18

申请号：US17320380

申请日：2021-05-14

Applicant: TDK CORPORATION

Inventor： Kyosuke Inui ,  Toru Tonogai ,  Yuichi Oyanagi

IPC: H01F27/29

Abstract: An electronic component according to the present invention includes: an element body containing metal particles and a resin; and a resin electrode layer formed on an electrode facing portion which is a part of an outer surface of the element body. The resin electrode layer contains a resin component and a conductor powder. In addition, the electrode facing portion includes an exposed portion formed by removing the resin on an outermost surface of the element body to expose a part of an outer periphery of the metal particles located on the outermost surface. Then, the resin electrode layer and the exposed portion of the electrode facing portion are joined to each other.

公开(公告)号：US12300417B2

公开(公告)日：2025-05-13

申请号：US17499269

申请日：2021-10-12

Applicant: TDK CORPORATION

Inventor： Toru Tonogai ,  Kyosuke Inui ,  Yuichi Oyanagi ,  Izuru Kimura

IPC: H01F27/28 ,  H01F27/25 ,  H01F27/255

Abstract: An element body includes a metal-particle-dispersed body in which metal particles are dispersed, the metal-particle-dispersed body includes a display region on a surface, and the display region includes a display pattern in which a resin exposed portion where a resin appears on a surface and a metal exposed portion where the metal particles appear on the surface are alternately repeated.

公开(公告)号：US12131862B2

公开(公告)日：2024-10-29

申请号：US17320402

申请日：2021-05-14

Applicant: TDK CORPORATION

Inventor： Kyosuke Inui ,  Makoto Morita ,  Takashi Kudo ,  Toshiyuki Anbo ,  Kyohei Tonoyama ,  Fuyuki Miura ,  Masanori Sugai ,  Eietsu Abe ,  Toru Tonogai ,  Yuichi Oyanagi

IPC: H01F27/29 ,  H01F27/28 ,  H01F41/06

CPC classification number: H01F27/29 ,  H01F27/2823 ,  H01F41/06

Abstract: An electronic component according to the present invention includes: a leadout electrode portion provided on an outer surface of an element main body; and a resin electrode layer formed at a part of the outer surface of the element main body and connected to the leadout electrode portion. The leadout electrode portion contains copper as a main component, and the resin electrode layer includes a conductor powder containing silver, and a resin. Further, a diffusion layer containing copper oxide and silver is formed at an interface between the leadout electrode portion and the resin electrode layer.

公开(公告)号：USD1037158S1

公开(公告)日：2024-07-30

申请号：US29809239

申请日：2021-09-27

Applicant: TDK CORPORATION

Designer： Kyosuke Inui ,  Terumasa Toyoda ,  Toru Tonogai ,  Yuichi Oyanagi

Abstract: FIG. 1 is a front view of the coil component showing our new design.
FIG. 2 is a back view of the design.
FIG. 3 is a left-side view of the design.
FIG. 4 is a right-side view of the design.
FIG. 5 is a plan view of the design.
FIG. 6 is a bottom view of the design.
FIG. 7 is a perspective view of the design.
FIG. 8 is a cross section view of the design taken along line 8-8 shown in FIG. 5; and,
FIG. 9 is a cross section view of the design taken along line 9-9 shown in FIG. 8.
The evenly spaced broken lines depict portions of the coil component that form no part of the claimed design. The dot-dash chain lines depict a boundary of the claimed subject matter and form no part of the claimed design.

公开(公告)号：US11367556B2

公开(公告)日：2022-06-21

申请号：US16294381

申请日：2019-03-06

Applicant: TDK CORPORATION

Inventor： Toru Tonogai ,  Atsuyuki Nakano ,  Terumasa Toyoda ,  Yuichi Oyanagi

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

Abstract: An inductor has a coil portion made of a wire wound in a coil shape and an element body in which the coil portion is provided. The element body has a first core member, a second core member, and a third core member. The first core member has a winding core portion configured to be positioned inside the coil portion. The second core member is accommodated in the winding core portion. The third core member covers the coil portion and the first core member in which the second core member is accommodated in the winding core portion.

公开(公告)号：US20240290532A1

公开(公告)日：2024-08-29

申请号：US18585359

申请日：2024-02-23

Applicant: TDK Corporation

Inventor： Yuichi OYANAGI ,  Toru Tonogai ,  Tomoya Ishihara

IPC: H01F27/255 ,  H01F17/04 ,  H01F27/28

CPC classification number: H01F27/255 ,  H01F17/04 ,  H01F27/2823

Abstract: In a coil component, a recess provided on a surface of a magnetic sheet contributes to an enlargement of a bonding area between an element body and a magnetic sheet, and thus the interfacial peeling between the element body and the magnetic sheet is suppressed. In particular, since the magnetic sheet covers the entire region of the element body when viewed from the direction of the coil axis, the bonding area may be maximized and interfacial peeling may be further suppressed.