Composite magnetic particle including metal magnetic particle
AssigneeTaiyo Yuden Co., Ltd.
InventorAtsushi Tanada
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Abstract
A composite magnetic body according to one aspect of the present invention includes a first metal magnetic particle covered with a first resin portion made of a first resin material and a second metal magnetic particle having a smaller particle size than the first metal magnetic particle, where the second metal magnetic particle is bound to the first metal magnetic particle via a second resin portion made of a second resin material and the second resin material has a larger molecular weight than the first resin material.
Claims12
A composite magnetic particle comprising:
- a first metal magnetic particle covered with a first resin portion made of a first resin material;
- and
- a second metal magnetic particle having a smaller particle size than the first metal magnetic particle, the second metal magnetic particle being bound to the first metal magnetic particle via a second resin portion made of a second resin material, the second resin material having a larger molecular weight than the first resin material.
A magnetic base body comprising:
- a plurality of first metal magnetic particles each covered with a first resin portion made of a first resin material;
- and
- a plurality of second metal magnetic particles having a second average particle size smaller than a first average particle size, the first average particle size being an average particle size of the plurality of first metal magnetic particles,
- wherein each of the second metal magnetic particles is covered with a second resin portion made of a second resin material and bound to at least one of the first metal magnetic particles via at least one selected from the group consisting of the first resin portion and the second resin portion, and
- wherein, in a case where a cross-section of the magnetic base body is measured using a scanning electron microscope (SEM) with a magnification ratio of 2000, pairs of adjacent ones of the first metal magnetic particles are observed and 15% or less of the pairs have no second metal magnetic particle between the adjacent first metal magnetic particles.
A manufacturing method for a composite magnetic particle, the manufacturing method comprising steps of:
- coating a surface of a first metal magnetic particle with a first resin portion made of a first resin material;
- and
- binding a second metal magnetic particle having a smaller particle size than the first metal magnetic particle to the first metal magnetic particle via a second resin portion made of a second resin material, the second resin material having a larger molecular weight than the first resin material.
Dependencies are inferred from the claim text.