Murata Manufacturing Co., Ltd.

Tomoyuki Wada

Yuki Kanbe

Masahiro Bando

Kazuto Shibuya

Seiya Yuki

A coil component includes a core that has a columnar winding core portion and a flange formed at an end of the winding core portion in an axial direction. The coil component also includes a terminal electrode formed at an end surface of the flange and a wire being wound around the winding core portion with one end portion coupled to the terminal electrode. The flange protrudes toward the first end of the coil component in the first direction. A curved surface and an inclined surface are formed at a boundary between a surface of the flange and a peripheral surface of the winding core portion. The inclined surface has a curvature smaller than that of the curved surface. In addition, the inclined surface is disposed where the wire intersects the boundary as viewed in the first direction.

Coil component

A winding core includes a plurality of terminal electrodes on each flange portion, with a plurality of end surface electrode portions arranged at an interval on an outer end surface of the flange portion. To secure a predetermined interval between each of the plurality of end surface electrode portions, it is desirable for the dimension of each end surface electrode portion in a width direction to be as narrow as possible. Thus, a mask for forming an end surface base electrode layer, which is a base of an end surface electrode portion in a patterned state by sputtering, is improved to narrow a penetration passage through which particles of a film forming material pass. Thus, the dimension of the end surface base electrode layers, which are arranged at an interval in the width direction, in the width direction is less than 0.1 mm at the maximum value.

Winding core with electrodes and coil component

A core of a coil component is formed of a first flange, a second flange, and a winding core connecting the first flange and the second flange to each other. A winding is wound around the winding core. The core is formed of a first part and a second part, the second part having a smaller magnetic permeability and a higher rigidity than the first part. The second part is formed of an end portion of the first flange on one side in an extension direction of the first flange and an end portion of the second flange on one side in an extension direction of the second flange.

This disclosure provides an inductance element including a core, a conductive wire, and a pair of terminal electrodes. The core includes an upper flange portion and a lower flange portion formed on both ends of a winding-core portion, and the conductive wire is wound around the winding-core portion. End portions of the wire connect to a pair of terminal electrodes formed on a bottom surface of the lower flange portion. Each terminal electrode includes a principal electrode region and a pair of extension electrode regions extending from the principal electrode region toward respective side surfaces of the lower flange portion. Each extension electrode region of each terminal electrode is not formed on a region of the bottom surface of the lower flange portion through which one of the end portions of the conductive wires pass.

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Kyoto-fu, Japan

Tomoyuki Wada