Coil component and method for manufacturing coil component
AssigneeMurata Manufacturing Co., Ltd.
InventorHiroshi Marusawa
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Abstract
A coil component is capable of suppressing permeation of liquid or gas into a magnetic portion and increasing mechanical strength of the magnetic portion. A coil component includes a magnetic portion including soft magnetic metal particles having an insulating oxide layer on a surface thereof, with the soft magnetic metal particles being bonded to each other with the insulating oxide layer interposed therebetween; and a coil portion provided inside or on the surface of the magnetic portion. A mixture containing a resin and inorganic particles is disposed between the soft magnetic metal particles.
Claims20
A coil component comprising:
- a magnetic portion including soft magnetic metal particles having an insulating oxide layer on a surface thereof, the soft magnetic metal particles being bonded to each other with the insulating oxide layer interposed therebetween;
- a coil portion provided inside or on a surface of the magnetic portion;
- and
- a mixture containing a resin and inorganic particles disposed among the soft magnetic metal particles,
- wherein the insulating oxide layer is formed of ZnO, borosilicate glass or soda lime.
A method for manufacturing a coil component comprising:
- forming a coil portion inside or on a surface of a magnetic portion, the magnetic portion including a void portion, and soft magnetic metal particles having an insulating oxide layer on a surface thereof, the soft magnetic metal particles being bonded to each other with the insulating oxide layer interposed therebetween;
- filling the void portion in the magnetic portion with a mixture containing a resin and inorganic particles;
- and
- curing the resin,
- wherein the resin contained in the mixture being a resin composition containing a liquid epoxy resin and a liquid acid anhydride, or a resin composition containing a resin obtained by dissolving a solid epoxy resin in a solvent to form a varnish, and a liquid acid anhydride.
Dependencies are inferred from the claim text.