Murata Manufacturing Co., Ltd.

Toko, Inc.

Keita Muneuchi

Eiji Iso

Kenichi Araki

Takashi Tomohiro

Noriko Shimizu

Isao Ida

Kunio Sasamori

Keiichi Ishida

Masaaki Totsuka

Takeo Ohaga

Chitoshi Sakai

Makoto Murakami

Nobuyuki Fujisawa

Yoshihiko Hattori

Yusuke Kito

Hisashi Yano

Yoshinobu Kimura

A magnetic compact includes first magnetic particles, second magnetic particles with larger particle sizes than the first magnetic particles, and a resin. The area ratios calculated for multiple regions of the magnetic compact have a standard deviation of 0.40 or less, where area ratio=(total area of first magnetic particles)/(total area of second magnetic particles).

Magnetic compact and inductor

An electronic component includes an element body made of a composite material of a resin material and metal powder. A plurality of particles of the metal powder are exposed from the resin material and make contact with one another on the outer surface of the element.

Electronic component and method for manufacturing the same

A coil component includes a body that is made of a composite material containing a resin material and metal powder, a coil conductor which is provided in the body and an end portion of which is exposed on an end face of the body, and a metal film that is provided on an outer surface of the body and that is electrically connected to the coil conductor on the end face in the outer surface. The outer surface of the body has a contact area that is in contact with the metal film. Multiple particles of the metal powder escape from the resin material and are in contact with each other in the contact area of the body.

Coil component and method of manufacturing the coil component

A surface-mount inductor comprises a molded body containing a metal magnetic powder; at least one coil buried in the molded body such that lead-out end parts at both ends of the coil are at least partially exposed on a surface of the molded body; and an external terminal formed over an exposed surface of each of the lead-out end parts. A metal magnetic powder exposed portion is formed at least around the exposed surface. The external terminal at least includes a first plating layer formed over the metal magnetic powder exposed portion and the exposed surface of the lead-out end part, and a conductive paste layer formed on the first plating layer and made of a solidified conductive paste. Consequently, the surface mount inductor comprises an external terminal having high connection reliability.

Surface-mount inductor and manufacturing method thereof

A surface mounted inductor is equipped with a coil formed by winding a conductive wire, and a formed body in which the coil is sealed with a sealing material that mainly contains metal magnetic powder and a resin. The coil is embedded so that surfaces of lead-out ends are exposed on surfaces of the formed body. The resin at portions of surfaces of the formed body where external terminals are formed is removed, and the metal magnetic powder and a plating layer forming the external terminals are joined to each other, thereby connecting the external terminals and the lead-out ends of the coil.

Method for manufacturing a surface mounted inductor

An electronic component includes at least one coil including a winding part and lead-out end parts at both ends thereof, and a magnetic molded body having a mounting surface with the coil incorporated therein. The lead-out end parts are led out toward the mounting surface such that end surfaces of the lead-out end parts are arranged on the same plane as the mounting surface.

Electronic component and method of manufacturing the same

A manufacturing method of a surface mounted inductor involves using a coil and a tablet in a molding die. The coil is placed on the tablet. The coil and the tablet are arranged in the molding die and pressurized and compressed to the size of the cavity in the molding die at a first temperature. The coil and the tablet are pressurized in the molding die at a second temperature higher than the first temperature to form a formed body incorporating the coil.

Manufacturing method of surface mounted inductor

A method of producing a surface-mount inductor including an external electrode having high fixing strength with respect to an element body even in a high-humidity environment. The method includes the steps of: winding an electrically-conductive wire to form a coil; forming a core using a sealant primarily containing a metal magnetic powder and a resin in such a manner as to encapsulate the coil in the sealant while allowing each of opposite ends of the coil to be at least partially exposed on a surface of the core; reducing smoothness of a surface of at least a part of a portion of the core on which an external electrode is formed as compared to a surface therearound; and forming the external electrode on the core in such a manner as to be electrically conducted with the coil.

Method of producing surface-mount inductor

A coil component, in which a space on an outer periphery of a winding interposed between a pair of flange portion is coated with a resin with magnetic powder, has a problem of long-term reliability that a thermosetting resin expands and contracts due to change in a temperature and the flange portions are fatigued to be broken. An object of the present invention is to provide the coil component of which core is hardly broken even when the resin with magnetic powder expands and contracts and a method of manufacturing the same. In order to solve the above-described problem, the method of manufacturing the coil component according to one embodiment of the present invention is a method of manufacturing a coil component including a drum-shaped core including a winding core portion and a pair of flange portions provided on both ends in an axial direction of the winding core portion, and a winding wound around the winding core portion, including applying a mold releasing agent for providing a gap on at least one of opposed surfaces of the pair of flange portions, winding the winding around the winding core portion, applying a resin with magnetic powder formed of a thermosetting resin to a space on an outer periphery of the winding interposed between the pair of flange portions, and thermally curing the resin with magnetic powder.

Growing community of inventors

Tsurugashima, Japan

Keita Muneuchi