Patent ID: 8629748

Claim:
A wire-wound inductor comprising: a core member having a pillar-shaped core and a pair of flange parts provided on both sides of the core; a coil conductive wire wound around the core of the core member; a pair of terminal electrodes provided on an outer surface of the flange parts and connected to both ends of the coil conductive wire; and an insulation member covering an outer periphery of the coil conductive wire; wherein the core member is constituted by soft magnetic alloy grains containing iron, silicon, and chromium, where each soft magnetic alloy grain has an oxidized layer of the soft magnetic alloy grain on its surface, the oxidized layer contains more chromium than does the soft magnetic alloy grain, and the grains are bonded together via their oxidized layers so as to structure the core member independent of composite bonding; wherein the soft magnetic alloy contains chromium by 2 to 15 percent by weight; wherein the core member has a saturated magnetic flux density of 1.2 T or more, volume resistivity of 10 3 to 10 9 Ω·cm, and magnetic permeation ratio of 10 or more; and wherein the insulation member is constituted by a resin material containing magnetic powder and has a designated magnetic permeation ratio.