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US 2025/0357029 A1Published application
Soft magnetic powder and inductor
AssigneeMurata Manufacturing Co., Ltd.
InventorsKoichi IDA, Yuichi TSUCHIYA, Kana TANAKA
Life of this patent
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Abstract
A soft magnetic powder includes soft magnetic particles each having a nucleus that contains a soft magnetic metal and an insulating film on the surface of the nucleus. The insulating film contains Si and a hydrocarbon group having a C8 or longer linear-chain moiety, and the ratio by weight of Si to C in the insulating film is 7.6 or more and 42.8 or less (i.e., from 7.6 to 42.8).
Claims9
A soft magnetic powder comprising:
- soft magnetic particles, each having a nucleus that contains a soft magnetic metal and an insulating film on a surface of the nucleus, wherein:
- the nucleus has an oxide film which the oxidation of the soft magnetic between the insulating film and the surface of the nucleus;
- the nucleus contain no Cr or about 1.5% by weight or less Cr;
- and
- their oxygen content by weight is about 900 ppm or more and about 2800 ppm or less.
2 more elements
Dependencies are inferred from the claim text.