Murata Manufacturing Co., Ltd.

Takao Kawachi

Isao Ida

Hiroshi Okuizumi

Eiji Iso

Takuya Ishida

Mitsuru Odahara

Gota Shinohara

Hironobu Kubota

Noriko Shimizu

Mikito Sugiyama

Yoshiharu Sato

Hironori Suzuki

Hideaki Ooi

Keiichi Ishida

Takahiro Ogawa

Mari Yonemura

A manufacturing method for an electronic component includes preparing a first composite magnetic section provided with a first composite magnetic layer and at least one marker layer disposed on the first composite magnetic layer; and preparing a second composite magnetic section provided with a second composite magnetic layer and at least one coil formed by winding a conductive wire and buried in the second composite magnetic layer with part of the coil being exposed. The manufacturing method further includes obtaining a multilayer body by disposing the first composite magnetic section so that a surface on the opposite side of the first composite magnetic section to a surface where the marker layer is disposed opposes a surface of the second composite magnetic section; and obtaining a molded body having a marker area formed with non-conductive particles pressed into the first composite magnetic layer.

Electronic component and manufacturing method for the same

A coil component includes an element body and a coil conductor provided inside the element body, in which the element body has a substantially rectangular shape and has upper and lower surfaces facing each other in a winding axis direction of the coil conductor and first to fourth side surfaces. The element body includes a first magnetic body portion and a second magnetic body portion provided on a main surface of the first magnetic body portion. The coil conductor includes a winding portion and first and second extended portions extended to any side surface of the element body. The first magnetic body portion includes on the main surface thereof an outer convex portion and an inner convex portion provided outside and inside the winding portion, respectively. The outer convex portion is exposed only on one side surface or two adjacent side surfaces of the element body.

Coil component and method for manufacturing the same

A coil component includes a body, a coil conductor embedded in the body, and outer electrodes disposed on the outside of the body. The body includes a first magnetic layer containing a substantially spherical metallic magnetic material and second and third layers containing a substantially flat metallic magnetic material. At least the wound section of the coil conductor is between the second and third magnetic layers in the direction along the axis of the coil conductor. In the direction perpendicular to the axis, the second and third magnetic layers have a width equal to or larger than the outer diameter of the wound section of the coil component. The substantially flat metallic magnetic material is oriented so that the flat plane thereof is perpendicular to the axis of the coil conductor. The first magnetic layer extends between the second and third magnetic layers and the outer electrodes.

Coil component

A coil component including an element assembly and a coil conductor embedded in the element assembly. The element assembly includes a first magnetic layer and a second magnetic layer that constitute a first principal surface and a second principal surface, respectively, where the first principal surface and the second principal surface are opposite to each other in the element assembly. The first magnetic layer has a higher relative magnetic permeability than the second magnetic layer. At least part of a winding portion of the coil conductor is located in the first magnetic layer. The first magnetic layer contains metal magnetic particles and a resin, and the second magnetic layer contains metal magnetic particles, a resin, and zinc oxide particles. The metal magnetic particles and the zinc oxide particles are dispersed in the resin.

A coil is formed by winding an electrically-conductive wire, and is buried in a molded body formed from a composite magnetic material containing a magnetic powder and a resin. Each of led-out ends of the coil has a cut surface formed by obliquely cutting an electrically-conductive wire with respect to a surface thereof. The cut surface of each led-out end of the coil is exposed on a surface of the molded body, and each led-out end is connected to an external terminal electrode formed in the surface of the molded body at the cut surface.

Electronic component

A method of manufacturing an electronic component includes: a coil forming step of forming a winding coil by a wire-shaped conductor; a press fitting step of embedding the winding coil into a plate-shaped composite magnetic material in a state in which the plate-shaped composite magnetic material is softened, the plate-shaped composite magnetic material being a composite magnetic material that is formed in a plate shape and in which magnetic particles and a resin are mixed; a covering step of covering a part of the winding coil with another plate-shaped composite magnetic material that is softened, the part of the coil being a part remaining uncovered in the press fitting step; a pressurizing step of pressurizing and molding an entirety; and, a hardening step of hardening the composite magnetic material.

Growing community of inventors

Nagaokakyo, Japan

Takao Kawachi