Tdk Corporation

Mitsuo Natori

Tomonaga Nishikawa

Yuuichi Kawaguchi

Kouji Kawamura

Hidenori Tsutsui

Kentaro Saito

Takeshi Okumura

Kyohei Tonoyama

Takuya Takeuchi

Junichi Shimamura

Hitoshi Ozawa

Shota Otsuka

Taichi Hirose

Kyohei Yazaki

Shouji Shimada

Kenichi Ichinose

Disclosed herein is a coil component that includes a plurality of conductor layers including first, second, third, and fourth conductor layers stacked one on another in this order. First and third planar spiral coils are formed in the first and third conductor layers. A second planar spiral coil is formed in the second and fourth conductor layers. A pattern width of the second planar spiral coil formed in the second conductor layer is smaller than that of the second planar spiral coil formed in the fourth conductor layer, or a pattern width of each of the first and third planar spiral coils formed in the third conductor layer is smaller than that of each of the first and third planar spiral coils formed in the first conductor layer.

Coil component

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.

Coil component and manufacturing method therefor

A coil-embedded magnetic core capable of achieving improvements both in insulation and initial magnetic permeability, and coil devices thereof. The coil-embedded magnetic core embedding a coil made of a conductor, including magnetic powder and a resin, in which the coil-embedded magnetic core further includes a modifier.

Coil-embedded magnetic core and coil device

Disclosed herein is a coil component that includes a spiral conductor, a magnetic material layer covering the spiral conductor and having a through hole exposing an end of the spiral conductor, a through-hole conductor embedded in the through hole and has first region and second regions that are exposed from the magnetic material layer, a first conductor layer formed on an upper surface of the magnetic material layer and covering the first region of the through-hole conductor without covering the second region, and a second conductor layer covering the first conductor layer and the second region of the through-hole conductor, wherein the second conductor layer has a lower resistance than the first conductor layer.

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Tokyo, Japan

Mitsuo Natori