| 摘要 |
<p><P>PROBLEM TO BE SOLVED: 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>SOLUTION: The 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 hardly causing magnetic saturation and having the excellent superimposed DC current characteristics is provided. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
