Matsushita Electric Industrial Co., Ltd.

Tomokazu Kitagawa

Tsunetsugu Imanishi

Toshiyuki Nakata

Hiroyuki Hamamoto

Hidetoshi Hiwatashi

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.

Growing community of inventors

Osaka, Japan

Tomokazu Kitagawa