Soft magnetic powder, dust core, magnetic element, and electronic device

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 12170160
APP PUB NO 20230238162A1
SERIAL NO

18159886

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A soft magnetic powder contains a particle having a composition represented by FexCuaNbb(Si1-yBy)100-x-a-b, and 0.3≤a≤2.0, 2.0≤b≤4.0, and 75.5≤x≤79.5, and y is a number satisfying f(x)≤y≤0.99, and f(x)=(4×10−34)x17.56. The particle includes a crystal grain having a grain size of 1 nm to 30 nm, a Cu segregation portion, and a crystal grain boundary. A content proportion of the crystal grain is 30% or more. When the Cu segregation portion positioned in a surface layer portion and having a grain size of 2 nm to 10 nm is referred to as a first Cu segregation portion, and the Cu segregation portion positioned in an inner portion and having a grain size of 2 nm to 7 nm is referred to as a second Cu segregation portion, a number proportion of the first Cu segregation portion is 80% or more, a number proportion of the second Cu segregation portion is 80% or more, and the number of the second Cu segregation portion is twice or more the number of the first Cu segregation portion.

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Patent Owner(s)

Patent OwnerAddress
SEIKO EPSON CORPORATIONTOKYO 160-8801

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Inui, Mitsutaka Fujimi, JP 4 0
Watanabe, Mayu Hachinohe, JP 12 5

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