Taiyo Yuden Co., Ltd.

Akiko Yamaguchi

Kenji Otake

Shinsuke Takeoka

Takayuki Arai

Kazuhiko Oyama

Ryuichi Kondou

In an embodiment, a coil component includes a magnetic body, and an internal conductorhaving a center axis and formed in a spiral shape; wherein the internal conductoris embedded in the magnetic body; in a cross sectional view of a plane that includes the center axis extending in the vertical direction, wherein a conductor region partpositioned between the adjacent windings of the spiral shape has a higher oxygen content than that of a core partincluding the center axis and positioned on the inner side of the windings of the spiral shape. the magnetic body is constituted by iron-based soft magnetic grains and oxide film of at least one type of element that oxidizes more easily than iron, which oxide film bonds at least partly the iron-based soft magnetic grains.

Coil component

One object is to provide a laminated inductor having a reduced thickness without reduction in the magnetic characteristic and the insulation quality. The laminated inductor includes a first magnetic layer, an internal conductor, second magnetic layers, third magnetic layers, and a pair of external electrodes. The first magnetic layer includes three or more magnetic alloy particles arranged in the thickness direction and an oxide film binding the magnetic alloy particles together and containing Cr. The three or more magnetic alloy particles have an average particle diameter of 4 &#x3bc;m or smaller. The internal conductor includes a plurality of conductive patterned portions electrically connected to each other via the first magnetic layer. The second magnetic layers are composed of magnetic alloy particles and disposed around the conductive patterned portions. The third magnetic layers are composed of magnetic alloy particles and disposed so as to be opposed to each other in thickness direction.

Laminated inductor

One object is to provide a laminated inductor having a reduced thickness without reduction in the magnetic characteristic and the insulation quality. The laminated inductor includes a first magnetic layer, an internal conductor, second magnetic layers, third magnetic layers, and a pair of external electrodes. The first magnetic layer has a thickness of 4 to 19 &#x3bc;m, and includes three or more magnetic alloy particles arranged in the thickness direction and an oxide film binding the magnetic alloy particles together and containing Cr. The internal conductor includes a plurality of conductive patterned portions electrically connected to each other via the first magnetic layer. The second magnetic layers are composed of magnetic alloy particles and disposed around the conductive patterned portions. The third magnetic layers are composed of magnetic alloy particles and disposed so as to be opposed to each other in thickness direction.

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Tokyo, Japan

Akiko Yamaguchi