Inductor
AssigneeNEC Tokin Corporation
InventorsKenichi Chatani, Naoharu Yamamoto
Life of this patent
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Abstract
An inductor comprises a magnetic core and a coil. The magnetic core has a wound portion around which the coil is wound, and a peripheral portion. The magnetic core is formed from two or more preliminarily-formed-bodies which are pressure-molded in a state where the coil winds one or more preliminarily-formed-bodies which form the wound portion. The preliminarily-formed-bodies include at least one preliminarily-formed-body which forms the peripheral portion while not form the wound portion. Each of the preliminarily-formed-bodies is made of a mixture of flat magnetic powders and an organic binder so as to have a plate-like shape. The flat magnetic powders are oriented so as to be parallel to the preliminarily-formed-body.
Claims10
An inductor comprising:
- a magnetic core having a wound portion and a peripheral portion, the magnetic core being formed by pressure-molding a plurality of preliminarily-formed-bodies each having a plate-like shape parallel to a predetermined plane, the plurality of preliminarily-formed-bodies including at least one first preliminarily-formed-body which forms the wound portion and at least one second preliminarily-formed-body which forms the peripheral portion, wherein the at least one second preliminarily-formed-body is other than the at least one first preliminarily-formed-body, and the at least one second preliminarily-formed-body does not form the wound portion, wherein each of the plurality of preliminarily-formed-bodies is formed from a mixture of flat magnetic powders and an organic binder, each of the flat magnetic powders being oriented so as to be substantially parallel to the predetermined plane;
- and
- a coil wound around the wound portion, wherein the plurality of preliminarily-formed-bodies are pressure-molded in a state where the coil is wound around the at least one first preliminarily-formed-body,
- wherein the magnetic core is formed without any holes except for through holes for winding the coil;
- wherein the magnetic core is formed by pressure-molding the plurality of preliminarily-formed-bodies which are stacked in an upper-to-lower direction perpendicular to the predetermined plane;
- wherein the peripheral portion has an upper surface and a lower surface in the upper-to-lower direction, each parallel to the predetermined plane;
- and
- wherein the wound portion has an upper surface and a lower surface in the upper-to-lower direction, wherein the upper surface of the wound portion is located below the upper surface of the peripheral portion in the upper-to-lower direction, and the lower surface of the wound portion is located above the lower surface of the peripheral portion in the upper-to-lower direction.
Dependencies are inferred from the claim text.