Patent ID: 8283888

Claim:
A power receiver, comprising: a power receiving coil having a planar spiral coil; a rectifier for rectifying an AC voltage generated in the power receiving coil; a secondary battery to which a DC voltage rectified by the rectifier is charged; and a flexible magnetic foil arranged in at least one position between the planar spiral coil and the secondary battery and between the planar spiral coil and the rectifier, wherein the flexible magnetic foil comprises a laminate including a plurality of magnetic alloy thin strips laminated directly or through an insulation layer, wherein each of the magnetic alloy thin strips is formed of an amorphous alloy or an Fe-based microcrystalline alloy, and has an average thickness in a range of 5 to 50 μm, and wherein a thickness of the laminate is in a range of 500 μm or less, and the thickness of the laminate contains a thickness of the insulation layer when the plural magnetic alloy thin strips are laminated through the insulation layer.