COIL HAVING MULTI-LAYER STRUCTURE
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United States of America Patent
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Dec 10, 2015
app pub date -
Dec 27, 2013
filing date -
Dec 27, 2012
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Abstract
A coil according to one embodiment of the present invention relates to a coil having a multi-layer structure, comprising n winding wires (n≧2, n is natural number) which are spaced apart from a central axis and wound around the central axis, wherein a first winding of the n windings is wound to a first height in a direction perpendicular to a reference surface, a second winding is wound to a second height lower than the first height in a direction perpendicular to the reference surface, the first winding has a first radius from the central axis, the second winding has a second radius from the central axis, the second radius being smaller than the first radius, and the second winding wire is disposed in the first winding wire.
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