Magnetic base body containing metal magnetic particles and coil component including the same
AssigneeTaiyo Yuden Co., Ltd.
InventorsTakashi Nakajima, Keiko Yajima
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Abstract
A magnetic base body relating to one or more embodiments of the present invention includes metal magnetic particles exhibiting a volume-based particle size distribution indicating that a most frequent particle size is less than 2 μm and that a cumulative frequency of particle sizes ranging from the smallest particle size to 30% of the most frequent particle size is equal to or less than 1% and an insulating film formed on the surface of each of the metal magnetic particles, where the insulating film exhibits insulating properties.
Claims16
A method for forming a magnetic base body for a coil component, the method comprising:
- preparing a plurality of metal magnetic particles such that the metal magnetic particles are distributed according to a predetermined volume-based particle size distribution where a most frequent particle size ranges from 0.3 μm to 1.9 μm and a cumulative frequency of particle sizes ranging from a smallest particle size to 30% of the most frequent particle size is equal to or less than 1%;
- and
- oxidizing surfaces of the plurality of metal magnetic particles to form an insulating film on the surfaces of the plurality of metal magnetic particles, the insulating film exhibiting insulating properties and being an oxide of a metal element contained in the plurality of metal magnetic particles.
Dependencies are inferred from the claim text.