Tokin Corporation

Jfe Steel Corporation

National Institute of Advanced Industrial Science and Technology

Jfe Precision Corporation

Toshinori Tsuda

Kenichi Chatani

Kenji Ikeda

Naomichi Nakamura

Mineo Muraki

Takuya Takashita

Kimihiro Ozaki

Akiri Urata

Makoto Nakaseko

Hoshiaki Terao

Makoto Yamaki

Raita Wada

Yu Kanamori

Koichi Okamoto

Shoichi Sato

Provided is a method of manufacturing a soft magnetic dust core. The method includes: preparing coated powder including amorphous powder made of an Fe-B-Si-P-C-Cu-based alloy, an Fe-B-P-C-Cu-based alloy, an Fe-B-Si-P-Cu-based alloy, or an Fe-B-P-Cu-based alloy, with a first initial crystallization temperature Tand a second initial crystallization temperature T; and a coating formed on a surface of particles of the amorphous powder; applying a compacting pressure to the coated powder or a mixture of the coated powder and the amorphous powder at a temperature equal to or lower than T−100 K; and heating to a maximum end-point temperature equal to or higher than T−50 K and lower than Twith the compacting pressure being applied.

Method of manufacturing soft magnetic dust core

A module includes a circuit board and an inductor. The circuit board has a facing surface and a rear surface which are located at opposite sides to each other in an up-down direction. The inductor has a magnetic core and a coil. The magnetic core is made of a soft magnetic metal material. The magnetic core has a facing surface and a radiating surface which are located at opposite sides to each other in the up-down direction. The facing surface of the magnetic core is arranged to face the facing surface of the circuit board in the up-down direction. The radiating surface of the magnetic core is arranged to be radiatable heat outward. The coil has a coil portion and a connection end. The coil portion winds, at least in part, the magnetic core. The connection end is connected to the facing surface of the circuit board.

Magnetic core, inductor and module including inductor

A module comprises a circuit board and an inductor. The circuit board has a facing surface and a rear surface which are located at opposite sides to each other in an up-down direction. The inductor has a magnetic core and a coil. The magnetic core is made of a soft magnetic metal material. The magnetic core has a facing surface and a radiating surface which are located at opposite sides to each other in the up-down direction. The facing surface of the magnetic core is arranged to face the facing surface of the circuit board in the up-down direction. The radiating surface of the magnetic core is arranged to be radiatable heat outward. The coil has a coil portion and a connection end. The coil portion winds, at least in part, the magnetic core. The connection end is connected to the facing surface of the circuit board.

A soft magnetic molded body, in which a binder component is used to bind a soft magnetic metal powder that has a flat shape, includes 60% by volume or more of the soft magnetic metal powder and 10-30% by volume of fine open pores. The binder component includes an inorganic oxide as a main component.

Soft magnetic molded body, magnetic core, and magnetic sheet

Growing community of inventors

Sendai, Japan

Toshinori Tsuda