Dust core, method for manufacturing dust core, electric/electronic component including dust core, and electric/electronic device equipped with electric/electronic component
AssigneeAlps Electric Co., Ltd.
InventorsMasao Matsui, Satoshi Maruyama, Takao Mizushima
Life of this patent
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Abstract
A dust core includes a compact containing a soft magnetic powder and also includes a cover coat for the compact. The cover coat contains a polyamideimide-modified epoxy resin. An electric/electronic component includes the dust core, a coil, and a connection terminal connected to each end portion of the coil. At least one portion of the dust core is placed so as to be located in an induced magnetic field generated by the current flowing in the coil through the connection terminal. An electric/electronic device includes the electric/electronic component.
Claims20
A dust core adapted to be used with a coil, the dust core comprising:
- a compact containing a soft magnetic powder and a binding component, the compact having an outer surface having irregularities derived from the soft magnetic powder, and the compact having cavities therein;
- and
- a cover coat which is in direct contact with and covers the entire outer surface of the compact as a layer, the cover coat covering the irregularities of the outer surface and filling at least part of the cavities in the compact, the cover coat containing a polyamideimide-modified epoxy resin which is a product of reaction of a polyamideimide resin and an epoxy compound.
A dust core adapted to be used with a coil, the dust core comprising:
- a compact containing a soft magnetic powder and a binding component, the compact including cavities formed between adjacent particles of the soft magnetic powder therein, the compact having an outer surface having irregularities derived from the soft magnetic powder;
- and
- a cover coat formed over the outer surface of the compact as a layer and in direct contact therewith such that the cover coat covers the irregularities, the cover coat including an impregnation structure in the compact which is an extending portion impregnating into an inner structure of the compact beyond the outer surface of the compact so as to fill at least part of the cavities of the compact, the cover coat containing a polyamideimide-modified epoxy resin which is a product of reaction of a polyamideimide resin and an epoxy compound.
Dependencies are inferred from the claim text.