Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Hidetoshi Hiwatashi

Tsunetsugu Imanishi

Toshiyuki Nakata

Hiroyuki Hamamoto

Tomokazu Kitagawa

The present invention provides a coil component and a method for making the coil component that includes: a coil section having a through hole and composed of a plurality of ring sections formed of a metallic flat plate disposed in a plane, connected to each other at ring connecting sections, having slits formed by cutting part of the ring sections, and bent at the ring connecting sections and placed one on top of another, terminals connected to the coiled section, and a package member covering the coil section and projecting the terminals therefrom. With this structure, the coil component operates in a high-frequency region, ensuring an inductance and infinitesimal direct-current resistance while being adaptable to a large current, and can be miniaturized.

Coil component and method of producing the same

A coil component includes a coilhaving a through-hole, a magnetic core encapsulating the coil, and a terminal. The magnetic core includes a top portiondisposed at an upper part of the coil, a bottom portiondisposed at a lower part of the coil, and a middle portion. An outer layer thickness of the middle portion (W) is less than a diameter of the through-hole, while the top portion and the bottom portion are higher in density than the middle portion. The configuration of the present invention provides a small size coil component with less occurrence of magnetic saturation to prevent lowering of inductance even with thin topand bottom portions. The coil component further has improved reliability.

Coil component and method of manufacturing the same

The present invention provides a coil component includes: a coil section having a through hole and composed of a plurality of ring sections formed of a metallic flat plate disposed in a plane, connected to each other at ring connecting sections, having slits formed by cutting part of the ring sections, and bent at the ring connecting sections and placed one on top of another, terminals connected to the coil section, and a package member covering the coil section and projecting the terminals therefrom. With this structure, the coil component operates in a high-frequency region, ensuring an inductance and infinitesimal direct-current resistance while being adaptable to a large current, and can be miniaturized.

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Takatsuki, Japan

Hidetoshi Hiwatashi