Tdk Corporation

Fuyuki Miura

Takashi Kudo

Makoto Morita

Kyohei Tonoyama

Masanori Sugai

Kazunori Arimitsu

Yasunori Chiba

Nobuo Kitajima

Toru Tonogai

Toshiyuki Anbo

Yuichi Oyanagi

Kazuhiko Shibata

Kyosuke Inui

Naoki Satou

Eietsu Abe

Kazuya Higurashi

Kiichi Fujisawa

Takehiko Narisawa

Junichi Aoyado

Daiki Amano

A highly reliable coil device is provided. An inductorincludes a coilformed of a flat wire, a first terminalincluding a first wire connecting portionformed with a first accommodation recessed portionin which a first lead-out portionof the coilis accommodated, and a second terminalincluding a second wire connecting portionformed with a second accommodation recessed portionin which a second lead-out portionof the coilis accommodated, in which the first accommodation recessed portionand the second accommodation recessed portionare displaced from each other along a winding axis direction of the coil

Coil device

An electronic component according to the present invention includes: a leadout electrode portion provided on an outer surface of an element main body; and a resin electrode layer formed at a part of the outer surface of the element main body and connected to the leadout electrode portion. The leadout electrode portion contains copper as a main component, and the resin electrode layer includes a conductor powder containing silver, and a resin. Further, a diffusion layer containing copper oxide and silver is formed at an interface between the leadout electrode portion and the resin electrode layer.

Electronic component

A coil device includes a coil portion, an element body, and a terminal electrode. The coil portion is formed by a wire wound in a coil shape. The element body contains the coil portion where a part of an outer circumference of a lead-out part of the coil portion is exposed as an exposed portion from a bottom surface of the element body and where the rest of the outer circumference of the lead-out part of the coil portion is embedded as an embedded portion in the element body. The terminal electrode is formed on the bottom surface of the element body and connected with the exposed portion. An embedded length of the outer circumference of the lead-out part in the embedded portion is larger than a substantially half of a full length of the outer circumference of the lead-out part.

A coil device includes a conductor and a terminal electrode. The conductor is embedded in a core body and wound in a coil shape. The terminal electrode is formed on an end surface of the core body and connected with a lead end of the conductor. The coil device further includes a dummy conductor embedded in the core body separately from the conductor. An end part of the dummy conductor exposed from the end surface of the core body separately from the lead end is connected with the terminal electrode.

To provide a coil component that can adequately ensure component accuracy even when miniaturization is pursued. A coil component includes a main body portion structured with green compact containing magnetic material, a coil arranged inside the main body portion, a pair of lead wires each drawn out from the coil to outside of the main body portion, terminal fittings electrically connected to the lead wires at the outside of the main body portion, and welding portions connecting the lead wires and the terminal fittings. The pair of lead wires is both drawn out towards a first direction that is orthogonal to an axis direction of the coil. Drawing surfaces of the main body portion are disposed towards the coil side from a first side surface that is an end of the main body portion in the first direction. The drawing surfaces perpendicularly intersect the lead wires.

Coil component and method for manufacturing coil component

Coil component

Coil unit

Growing community of inventors

Tokyo, Japan

Fuyuki Miura