Murata Manufacturing Co., Ltd.

Yasuhiro Itani

Takashi Sukegawa

Yoshifumi Maki

Yuuki Kitadai

Takanori Suzuki

Reiichi Matsuba

Hiroki Hashimoto

Masayuki Oishi

Seiji Karimori

Masashi Miyamoto

Katsuyuki Takahashi

Takuma Shiro

Ryo Narahara

A coil component includes a core including a winding core portion and a first flange portion, a first wire and a second wire that are wound around the winding core portion in the same direction, and a first terminal electrode that is disposed on the first flange portion and that is connected to a first end portion of the first wire. The shape of an outer edge of the first terminal electrode includes a convex curve.

Coil component

A coil component includes a core including a winding core portion, a first flange portion, and a second flange portion, and a first wire and a second wire that are wound around the winding core portion in the same direction and that form a winding portion. The winding portion includes a second intersecting portion along a third side surface of the winding core portion at a position on the winding portion nearest to the second flange portion.

A coil component manufacturing apparatus for winding a twisted portion of wires at a desired position of a core. A coil component manufacturing apparatus including a nozzle through which a plurality of wires can be inserted, a wire twisting mechanism that holds a core, rotates the core relative to the nozzle in a direction of twisting the wires, and forms a twisted portion in which the wires are twisted between the nozzle and the core, a wire winding mechanism that holds the core, rotates the core relative to the nozzle in a direction of winding the twisted portion is wound around the core, and winds the twisted portion around the core, and a guide member positioned closer to the core than the nozzle. The guide member guides the twisted portion to a predetermined position of the core when the twisted portion is wound around the core.

Coil component manufacturing apparatus and coil component manufacturing method

A coil component includes a core including a winding core portion, a first flange portion, and a second flange portion, and a plate member that is mounted on the first flange portion and the second flange portion. A distance in a height direction between the plate member and the first flange portion, or a distance in the height direction between the plate member and the second flange portion, or both vary in a length direction, or in a width direction, or both.

A coil component includes a core including a winding core portion and a first flange portion that is disposed on a first end portion of the winding core portion in a direction in which the winding core portion extends. A first curved portion is formed at a connection between a bottom surface of the winding core portion and the first flange portion. A ratio of a length of the first curved portion in a height direction to a distance in the height direction between the bottom surface and a first terminal electrode is no less than 20% and no more than 60% (i.e., from 20% to 60%).

A coil component includes a drum-shaped core including a core part having a circumferential surface including a first side surface and a second side surface parallel to each other; and a coil including two wires wound around the core part in the same direction. The coil has a first twisted wire part having the two wires twisted together on the first side surface, and a second twisted wire part having the two wires twisted together on the second side surface. The first twisted wire part and the second twisted wire part are identical in shape.

Coil component and method of manufacturing coil component

A coil component includes a core including a winding core portion, a first flange portion, and a second flange portion, a first wire and a second wire that are wound around the winding core portion in the same direction and that form a winding portion, a first terminal electrode and a second terminal electrode that are disposed on the first flange portion, and a third terminal electrode and a fourth terminal electrode that are disposed on the second flange portion. A length of the winding portion along a bottom surface of the winding core portion is shorter than a length of the winding portion along an upper surface of the winding core portion.

A multilayer inductor manufacturing method includes stacking a first coil conductor layer on a first magnetic layer; stacking a first burn-away material on side surfaces of the first coil conductor layer; stacking a second magnetic layer on the first burn-away material and first magnetic layer; stacking a second burn-away material on the second magnetic layer laterally outside an upper surface of the first coil conductor layer; stacking a second coil conductor layer on the upper surface of the first coil conductor layer and second burn-away material; stacking a third burn-away material on side surfaces and an upper surface of the second coil conductor layer; stacking a third magnetic layer on side surfaces of the third burn-away material and the second magnetic layer; stacking a fourth magnetic layer on the third burn-away material and the third magnetic layer; and burning away the first, second, and third burn-away materials via firing.

Multilayer inductor manufacturing method and multilayer inductor

A coil component includes an element and a coil that is provided inside the element and that is spirally wound. The coil includes a plurality of coil conductor layers and an extended conductor layer, which are laminated in a first direction. The extended conductor layer overlaps a side gap portion, which is situated on an outer side of a region of the element that is surrounded by the coil conductor layers, and extends so as to reach an outer surface of the element. The element includes a first stress relaxation layer that contacts the coil conductor layers, and a second stress relaxation layer that, while extending along the extended conductor layer, contacts a coil-conductor-layer side of the extended conductor layer, and is positioned inside the side gap portion without reaching the outer surface of the element.

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Nagaokakyo, Japan

Yasuhiro Itani