COIL COMPONENT
First Claim
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1. A coil component comprising:
- a coil unit including a substrate and a conductor pattern for planar coil provided on the substrate; and
a metal magnetic powder-containing resin covering the coil unit, wherein the metal magnetic powder-containing resin contains three or more kinds of metal powders different in average grain diameter, and wherein, out of the metal powders contained in the metal magnetic powder-containing resin, at least part of the metal powder having a minimum average grain diameter is not covered with an insulating coating, and the remaining metal powders are covered with an insulating coating.
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Abstract
In a coil component (planar coil element), at least part of a third metal magnetic powder constituting a metal magnetic powder and having a minimum average grain diameter is uncoated, which suppresses a reduction in magnetic permeability. On the other hand, the remaining metal powders are coated with glass, which improves the insulating properties of a metal magnetic powder-containing resin and reduces core loss.
44 Citations
6 Claims
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1. A coil component comprising:
- a coil unit including a substrate and a conductor pattern for planar coil provided on the substrate; and
a metal magnetic powder-containing resin covering the coil unit, wherein the metal magnetic powder-containing resin contains three or more kinds of metal powders different in average grain diameter, and wherein, out of the metal powders contained in the metal magnetic powder-containing resin, at least part of the metal powder having a minimum average grain diameter is not covered with an insulating coating, and the remaining metal powders are covered with an insulating coating. - View Dependent Claims (2, 3, 4, 5, 6)
- a coil unit including a substrate and a conductor pattern for planar coil provided on the substrate; and
Specification