| 摘要 |
PROBLEM TO BE SOLVED: To provide a dust core made of magnetic powder which is effectively improved in magnetic characteristics and a yield, and to provide a method of manufacturing the same. SOLUTION: On a surface of magnetic powder 1, an insulating film 2 including DLC and/or fullerene-containing DLC is formed, the magnetic powder 1 is compression-molded to obtain a molding of the dust core, and the molding is heat-treated to remove strain. Further, the magnetic powder 1 has a particle sizeϕof 1μm to 1 mm and the insulating film has a film thickness of 1-10μm. COPYRIGHT: (C)2011,JPO&INPIT
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