| abstract |
Disclosed is a planar coil which is made thin, wherein an effective resistance is increased with the decrease in the high frequency range. The planar coil (10) and a plurality of electrically conductive wires (11) being parallel with each other, which are wound spirally and arranged planarly, and are connected in parallel such that the ends (13a, 13b) of the respective electrically conductive wires (11) are connected substantially electrically with each other at a coil lead-out portions (12a,12b). Since the electrically conductive wires (11) of the planar coil (10) are arranged substantially planarly, coil thickness does not increase and the planar coil (10) is made thin. Furthermore, an increase in effective resistance due to skin effect is minimized in the high frequency range because the plurality of conductive wires (11) are connected in parallel. |