Composite magnetic material and inductor using the same

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United States of America Patent

PATENT NO 11901104
APP PUB NO 20230207168A1
SERIAL NO

18172169

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A magnetic material and an inductor capable of attaining both higher magnetic permeability and improved DC superposition characteristics. A composite magnetic material contains metal magnetic particles, in which the metal magnetic particles include first particles having a median diameter D50 of 1.3 μm or more and 5.0 μm or less (i.e., from 1.3 μm to 5.0 μm), and second particles having a median diameter D50 larger than the first particles. The first and second particles each include a core portion made of a metal magnetic material, and an insulating film provided on a surface of the core portion. The insulating film of the second particles has an average thickness of 40 nm or more and 100 nm or less (i.e., from 40 nm to 100 nm). The insulating film of the first particles has an average thickness smaller than that of the insulating film of the second particles.

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Patent Owner(s)

Patent OwnerAddress
MURATA MANUFACTURING CO LTDNAGAOKAKYO-SHI KYOTO 617-8555

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ida, Koichi Nagaokakyo, JP 9 32
Ishida, Takuya Nagaokakyo, JP 154 1093
Odahara, Mitsuru Nagaokakyo, JP 32 116
Ooi, Hideaki Nagaokakyo, JP 10 27
Sugiyama, Mikito Nagaokakyo, JP 40 601

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