Murata Manufacturing Co., Ltd.

Takao Miyamoto

Akio Igarashi

Yuuji Igarashi

Takuya Ishida

Koji Onishi

Takashi Murakami

Kazuo Miyake

A coil component includes a drum-shaped core that includes a flange portion, a metal terminal that is mounted on the flange portion and that is formed from a metal plate, and an adhesive layer that contacts both a rising portion of the metal terminal and a rising surface of the flange portion. The adhesive layer includes a thick-walled portion and a thin-walled portion having different thicknesses.

Coil component

Advantage is taken of the fact that tin has a higher efficiency of absorption of a laser beam than, for example, copper. A method of manufacturing a coil component includes preparing a wire that includes a linear, central conductor and an insulating coating that covers a circumferential surface of the central conductor, preparing a metal terminal that is to be electrically connected to the central conductor at an end portion of the wire and that has a surface on which a tin-containing film that contains tin is disposed and above which at least the end portion of the wire is to be disposed, and welding the central conductor of the wire to the metal terminal by irradiating at least the tin-containing film with a laser beam with the end portion of the wire disposed along the tin-containing film.

Method of manufacturing a coil component

An adhesive layer is in contact with a rising portion of a metal terminal and an outer end surface of a flange portion of a drum-shaped core. A surface of the rising portion that faces the outer end surface is an inclined surface that inclines with respect to the outer end surface. The thickest portion of the adhesive layer is located near a position at which a distance between the inclined surface and the outer end surface is largest. The thickness of the thickest portion of the adhesive layer is 13 &#x3bc;m or more.

A method of manufacturing a coil component includes a heating step of locally heating metal terminals while the metal terminals are supported by a pressing member having a contact surface capable of coming into contact with the metal terminals in a state where an adhesive is disposed between the metal terminals and a drum core.

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Nagaokakyo, Japan

Takao Miyamoto