Patent ID: 8072304

Claim:
A noncontact power-transmission coil, comprising: a planar coil, formed by winding a linear conductor in a spiral shape substantially in a single plane, the planar coil defining a series of coil turns with sequential ones of the coil turns being in contact with one another to form alternating ones of exterior protrusions and exterior depressions on an exterior side planar portion of the planar coil and alternating ones of interior protrusions and interior depressions on an interior side planar portion of the planar coil; and, a cured magnetic layer mixture of magnetic particles and a binder solvent, so as to completely cover exterior protrusions and occupy the exterior depressions on the exterior side planar portion of the planar coil while the interior depressions define empty space between sequential ones of the interior protrusions the cured magnetic layer mixture also covering a side face portion of the planar coil.