| 摘要 |
<p>[Problem to be solved]</p><p><Paragraphs id="pa02" num="0002" xmlns:base="http://www.sipo.gov.cn/XMLSchema/base">To provide a compact inductor having a low resistance, a high inductance, and an excellent superimposed DC current characteristic because of a low possibility of occurring a magnetic saturation.</p><p><Paragraphs id="pa03" num="0003" xmlns:base="http://www.sipo.gov.cn/XMLSchema/base">[Means for solving the problem]</p><p><Paragraphs id="pa04" num="0004" xmlns:base="http://www.sipo.gov.cn/XMLSchema/base">A compact inductor 10 comprises a coil 11, a coil-burying body 12, and a body for a closed magnetic circuit 13. The coil-burying body is a fired porous ceramic body having a first magnetic permeability, in which the coil is buried. In the coil-burying body, "a through-hole 12a passing through inside of the coil along an axis of the coil" is formed. The body for a closed magnetic circuit is a fired dense ceramic body having a second magnetic permeability greater than the first magnetic permeability. The body for a closed magnetic circuit is arranged closely/densely at an outer circumference portion of the coil-burying body and in the through-hole. A magnetic path is therefore formed mainly within the body for a closed magnetic circuit, and the magnetic flux density is reduced in an area close to the coil. Accordingly, an inductor having the excellent superimposed DC current characteristic is provided.
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