Patent ID: 8896407
Filing Date: 2014-11-25
Classification: H01F

Abstract:
1. 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.