公开(公告)号：US20230126614A1

公开(公告)日：2023-04-27

申请号：US17971177

申请日：2022-10-21

Applicant: TDK Corporation

Inventor： Masanori SUZUKI ,  Takuya TAKEUCHI ,  Tomonaga NISHIKAWA ,  Nobuya TAKAHASHI ,  Naoaki FUJII

IPC: H01F27/32 ,  H01F27/29 ,  H01F41/12

Abstract: Disclosed herein is a coil component that includes a coil part having a structure in which a plurality of conductor layers each having a coil pattern are stacked in a coil axis direction through a plurality of interlayer insulating films, a first magnetic layer covering the coil part in the coil axis direction, and a second magnetic layer positioned in an inner diameter area of the coil part. The plurality of interlayer insulating films include a first interlayer insulating film positioned closest to the first magnetic layer. The first and second magnetic layers contact each other through an opening formed in the first interlayer insulating film. The opening has a shape whose diameter increases as a distance from an interface between the first and second magnetic layers increases.

公开(公告)号：US20220375681A1

公开(公告)日：2022-11-24

申请号：US17762216

申请日：2020-09-24

Applicant: TDK Corporation

Inventor： Takuya TAKEUCHI ,  Yuuichi KAWAGUCHI ,  Masanori SUZUKI ,  Naoaki FUJII

IPC: H01F27/32 ,  H01F27/29 ,  H01F41/04 ,  H01F27/02

Abstract: A coil component has a magnetic element body made of resin containing magnetic particles, a coil part embedded in the magnetic element body, conductor posts which are embedded in the magnetic element body and whose one ends are connected to the coil part and the other ends are exposed from the magnetic element body, an insulating layer interposed between the conductor posts and the magnetic element body, and other insulating layers interposed between the coil part and the magnetic element body. Since the insulating layer is interposed between the conductor posts and the magnetic element body, it is possible to ensure insulation performance between the conductor posts and the magnetic element body and to prevent the occurrence of peeling therebetween.

公开(公告)号：US20240170202A1

公开(公告)日：2024-05-23

申请号：US18549264

申请日：2022-02-22

Applicant: TDK Corporation

Inventor： Yuuichi KAWAGUCHI ,  Naoaki FUJII ,  Masanori SUZUKI ,  Takuya TAKEUCHI ,  Tomonaga NISHIKAWA ,  Hiroki SHIBA

IPC: H01F27/29 ,  H01F17/04

CPC classification number: H01F27/292 ,  H01F17/04

Abstract: To improve a coil component having a structure in which a coil part is embedded in a magnetic member. A coil component includes a coil part embedded in the magnetic members and terminal electrodes each made of a conductive paste. Conductor layers constituting the coil part respectively have coil conductor patterns and electrode patterns exposed from a mounting surface. The terminal electrode has an area provided at a position covering the electrode patterns on the mounting surface and areas provided at positions not covering the electrode patterns on the mounting surface. A part of the area constitutes a protruding part protruding in the x-direction. The terminal electrode thus has the protruding part, thereby making misalignment of mounting position in the z-direction less likely to occur at the time of mounting.

公开(公告)号：US20250104898A1

公开(公告)日：2025-03-27

申请号：US18891123

申请日：2024-09-20

Applicant: TDK Corporation

Inventor： Akira MOTOHASHI ,  Naoaki FUJII ,  Tomonaga NISHIKAWA ,  Hiroki NAKAGOMI ,  Takuya TAKEUCHI

IPC: H01F17/04 ,  H01F5/04 ,  H01F5/06

Abstract: Disclosed herein is a coil component that includes plural conductor layers embedded in the magnetic element body. Each of the conductor layers includes a coil pattern, and first and second connection patterns exposed from the magnetic element body. The conductor layers includes a first conductor layer positioned at one end portion in the stacking direction, a second conductor layer positioned at the other end portion in the stacking direction, and one or more third conductor layers positioned between the first and second conductor layers. In the second conductor layer, an outer peripheral end of the coil pattern is connected to the second connection pattern through a lead-out pattern. In at least one of the first to third conductor layers, the magnetic element body is disposed in a separation area overlapping the lead-out pattern in the stacking direction.

公开(公告)号：US20240203625A1

公开(公告)日：2024-06-20

申请号：US18555158

申请日：2022-03-18

Applicant: TDK Corporation

Inventor： Michitaka OKAZAKI ,  Ikuya KOKUBO ,  Takuya TAKEUCHI ,  Masaki ENDO ,  Masaki YONEYAMA

IPC: H01F5/06 ,  H01F41/12

CPC classification number: H01F5/06 ,  H01F41/122

Abstract: To suppress an increase in DC resistance due to surface roughening in a coil component including a spiral pattern. A coil component manufacturing method includes: a first step of forming a conductor layer including a spiral pattern spirally wound in a plurality of turns; a second step of selectively roughening an upper surface and an upper region of a peripheral-direction side surface of the spiral pattern; and a third step of forming an insulating resin layer so as to embed therein the conductor layer, and the first to third steps are repeatedly performed. Since the upper surface and the upper region of the side surface of the spiral pattern are selectively roughened, it is possible to suppress an increase in DC resistance due to excessive roughening at the lower region of the side surface.

公开(公告)号：US20240153696A1

公开(公告)日：2024-05-09

申请号：US18499509

申请日：2023-11-01

Applicant: TDK CORPORATION

Inventor： Takuya TAKEUCHI ,  Nobuyuki OKUZAWA ,  Nobuya TAKAHASHI

IPC: H01F27/29 ,  H01F27/32 ,  H01F41/04

CPC classification number: H01F27/292 ,  H01F27/324 ,  H01F41/041

Abstract: A coil component includes an element body, a pair of terminal electrodes, and a coil. The coil includes a first wiring portion, a second wiring portion, and a connection portion. A plurality of insulating layers includes a first insulating layer constituting a principal surface, the first insulating layer including the principal surface and a facing surface facing the principal surface, the first wiring portion being disposed along the facing surface, a second insulating layer constituting a mounting surface, and one or a plurality of third insulating layers disposed between the first insulating layer and the second insulating layer. A surface roughness of the facing surface of the first insulating layer is smaller than a surface roughness of each of surfaces of the second insulating layer and the third insulating layer.

公开(公告)号：US20230071379A1

公开(公告)日：2023-03-09

申请号：US17798496

申请日：2021-02-10

Applicant: TDK Corporation

Inventor： Yuuichi KAWAGUCHI ,  Tomonaga NISHIKAWA ,  Takuya TAKEUCHI ,  Mitsuo NATORI

IPC: H01F27/32 ,  H01F17/04 ,  H01F41/04

Abstract: To achieve a high inductance value while reducing the entire thickness in a coil component having a structure in which spiral coil patterns are stacked. A coil component includes: a coil part having a structure in which interlayer insulating films and spirally wound coil patterns are alternately stacked in the axial direction of the coil component; and magnetic element members embedding therein the coil part. The interlayer insulating film covering, from one end side in the axial direction, one coil pattern positioned at the one end in the axial direction is higher in permeability than the interlayer insulating films. Thus, the one coil pattern positioned at the end portion is covered with the interlayer insulating film having a high permeability, so that it is possible to achieve a high inductance value while reducing the entire thickness.

公开(公告)号：US20220375679A1

公开(公告)日：2022-11-24

申请号：US17767226

申请日：2020-09-29

Applicant: TDK Corporation

Inventor： Takuya TAKEUCHI ,  Naoaki FUJII ,  Nobuya TAKAHASHI

IPC: H01F27/29 ,  H01F17/00 ,  H01F27/32 ,  H01F41/04

Abstract: To improve magnetic characteristics of a coil component having a structure in which an interlayer insulating film is provided between a spiral coil pattern and a magnetic element body. A coil component 1 includes: an interlayer insulating film 41 covering coil patterns CP1 to CP3 from one side in the axial direction of the coil patterns; a magnetic element body M1 filled in the inner diameter areas of the coil patterns CP1 to CP3; and a magnetic element body M2 covering the coil patterns CP1 to CP3 from the one side in the axial direction through the interlayer insulating film 41. The interlayer insulating film 41 has a protruding part 41A radially protruding to the inner diameter area, and the protruding part 41A is curved to the other side in the axial direction. Since the protruding part 41A is curved in the axial direction, the entrance of a magnetic path passing through the inner diameter area is made wider than when the protruding part 41A linearly protrudes to the inner diameter area. This suppresses deterioration in magnetic characteristics due to the presence of the protruding part 41A.

公开(公告)号：US20180358169A1

公开(公告)日：2018-12-13

申请号：US16000669

申请日：2018-06-05

Applicant: TDK CORPORATION

Inventor： Tomonaga NISHIKAWA ,  Tomokazu ITO ,  Manabu YAMATANI ,  Masanori SUZUKI ,  Ikuya KOKUBO ,  Takuya TAKEUCHI

IPC: H01F27/29 ,  H01F41/12 ,  H01F5/04 ,  H01F5/06

CPC classification number: H01F27/292 ,  H01F5/04 ,  H01F5/06 ,  H01F41/12

Abstract: Disclosed herein is a coil component that includes: a coil part in which a plurality of conductor layers and a plurality of interlayer insulting layers are alternately laminated, the coil part having a mounting surface substantially parallel to the lamination direction and an upper surface substantially parallel to the lamination direction and positioned on an opposite side to the mounting surface; and a direction mark comprising a conductive material that covers a part of the conductor layers exposed on the upper surface.