Multi-layered inductance element

A multi-layered inductance element comprising:

• at least one dielectric substrate having a first and second surfaces;
• a first conductor line pattern including a plurality of first conductor line segments being apart from each other and disposed on the first surface of the dielectric substrate, wherein the first conductor line segments exhibit a substantially looped configuration as a whole if adjacent first conductor line segments are connected with each other;
• a second conductor line pattern including a plurality of second conductor line segments being apart from each other and disposed on the second surface of the dielectric substrate, wherein the second conductor line segments exhibit a substantially looped configuration as a whole if adjacent second conductor line segments are connected with each other;
• and
• a plurality of through-holes penetrating through the dielectric substrate, each through-hole electrically connecting one end of one of the first conductor line segments and one end of one of the second conductor line segments,
• wherein each of the first conductor line segments extends over at least a part of one of the second conductor line segments, the plurality of first conductor line segments being connected with the plurality of second conductor line segments via the through-holes, thereby forming a spiral conductor line in which a direction of current flow in the first conductor line pattern is the same as that in the second conductor line pattern,
• and wherein each of the second conductor line segments includes a pair of end parts and a halfway part having a width which is smaller than that of the end parts, the end parts being connected to adjacent first conductor line segments via the through-holes.