Murata Manufacturing Co., Ltd.

Junji Kurobe

Yoshihito Otsubo

Kuniaki Yosui

Norio Sakai

Mitsuyoshi Nishide

Gota Shinohara

Akihiro Nakamura

Takehiro Konoike

Noriko Shimizu

Yoichi Nakatsuji

Yasushi Takeda

Hironori Suzuki

Takashi Kodama

Hideo Ajichi

A coil electrode of a coil component includes a plurality of lower wiring patterns arranged on a lower surface of an insulating layer; a plurality of upper wiring patterns arranged on an upper surface of the insulating layer; a plurality of inner conductors disposed at an inner peripheral side of the coil core, each inner conductor connecting one end of the corresponding one of the lower wiring patterns and one end of a corresponding one of the upper wiring patterns forming the pair with the lower wiring pattern; and a plurality of outer conductors disposed at an outer peripheral side of the coil core, each outer conductor connecting the other end of the corresponding one of the lower wiring patterns and the other end of the corresponding one of the upper wiring patterns adjacent to an upper wiring pattern forming the pair with the lower wiring pattern.

Coil component

A coil component includes a main body portion containing resin, a coil provided in the main body portion, and an outer electrode electrically connected to the coil. A recess extending from a top surface of the main body portion toward a bottom surface thereof is provided in the side surface of the main body portion. The outer electrode is disposed in the recess, and a wall layer is interposed between the outer electrode and the inner surface of the recess.

Coil component and method for manufacturing the same

A coil component includes a main body portion containing resin and having a hole portion, a coil provided in the main body portion, and a substantially cylindrical pipe arranged inside the hole portion. The coil includes an inner wiring embedded in the pipe and an outer wiring exposed from the main body portion. The inner wiring and the outer wiring are integrally continuous.

A coil componentincludes an insulation layerin which a magnetic body coreis embedded; a coil electrodewound around the magnetic body core; and an input metal pinand an output metal pinfor external connection whose lower end surfaces are respectively provided being exposed from the insulation layerin a state of the input and output metal pinsandbeing provided upright in a thickness direction of the insulation layer. The coil electrodeincludes a plurality of coil metal pinsandthat are arranged around the magnetic body corein a state of being provided upright in the thickness direction of the insulation layer, and the input metal pinand the output metal pinare formed to be larger in diameter than the coil metal pinsand

An inductor manufacturing method includes a first step of press bonding a Cu foil onto a non-magnetic resin sheet, a second step of forming a conductor pattern by performing etching on the Cu foil, a third step of press bonding another non-magnetic resin sheet onto the conductor pattern, and a via conductor formation step of forming a via conductor that penetrates through the other resin sheet and leads to the conductor pattern. The method further includes a step of forming a body in which resin having magnetism is provided outside of a coil, by press bonding magnetic-powder-containing resin sheets onto a multilayer body, obtained by a manufacturing method including the first to third steps and the via conductor formation step, and then thermally curing the magnetic-powder-containing resin sheets.

Inductor manufacturing method

A multilayer coil having a laminate body having a plurality of insulating layers including a specified insulating layer. A linear coil conductor is substantially looped on the specified insulating layer. An insertion is located on the specified insulating layer, in a position between a first part and a second part of the coil conductor. The first part and the second part are closest parts to each other in the coil conductor. Along a boundary surface between the first part of the coil conductor and the insertion, the first part is located at an upper side of the coil conductor with respect to a stacking direction.

Multilayer coil and a manufacturing method thereof

A method of manufacturing a ferrite sintered body includes the steps of: adding B,C in a ferrite raw material and firing the ferrite raw material, whereby the ferrite sintered body has a high &mgr;i and a high Q, is less irregular in its characteristics, has a high volume resistivity and is capable of preventing deterioration of insulating resistance.

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Nagaokakyo, Japan

Junji Kurobe