Patent ID: 8373534

Claim:
A flexible coil comprising : a plurality of sheet-like coils laminated together in a region sharing a magnetic flux, wherein each sheet-like coil has a coil section formed along a surface of an insulating sheet having flexibility, wherein one or more holes are formed in center of the sheet-like coils, and one or more concave portions are formed on opposing side edge portions of the sheet-like coils; and a single flexible magnetic body formed by two flexible magnetic body's pieces which are sandwiching the plurality of the laminated sheet-like coils; wherein: a portion of each flexible magnetic body's piece is disposed in the sheet like coils hole to be entirely filled when sandwiched together to form the single flexible magnetic body; one of the flexible magnetic body's pieces is equal in size to the outline of the sheet like coils and the other of the flexible magnetic body's pieces is smaller in size than the outline of the sheet like coils; and electrodes are exposed on both sides of the flexible magnetic body's piece that is smaller in size than the outline of the sheet like coils.