US 11,887,762 B2
Soft magnetic metal powder, dust core, and magnetic component
Satoko Mori, Tokyo (JP); Hiroyuki Matsumoto, Tokyo (JP); Kenji Horino, Tokyo (JP); Kazuhiro Yoshidome, Tokyo (JP); Takuma Nakano, Tokyo (JP); Seigo Tokoro, Tokyo (JP); Shota Otsuka, Tokyo (JP); Toru Ujiie, Tokyo (JP); and Kentaro Mori, Tokyo (JP)
Assigned to TDK CORPORATION, Tokyo (JP)
Filed by TDK CORPORATION, Tokyo (JP)
Filed on Mar. 8, 2019, as Appl. No. 16/296,367.
Claims priority of application No. 2018-043644 (JP), filed on Mar. 9, 2018.
Prior Publication US 2019/0279798 A1, Sep. 12, 2019
Int. Cl. H01F 1/20 (2006.01); H01F 1/147 (2006.01); H01F 1/36 (2006.01); H01F 3/08 (2006.01); H01F 1/26 (2006.01); H01F 1/33 (2006.01); H01F 1/24 (2006.01); H01F 1/153 (2006.01); H01F 41/02 (2006.01)
CPC H01F 1/20 (2013.01) [H01F 1/14733 (2013.01); H01F 1/24 (2013.01); H01F 1/26 (2013.01); H01F 1/33 (2013.01); H01F 1/36 (2013.01); H01F 3/08 (2013.01); H01F 1/15308 (2013.01); H01F 1/15333 (2013.01); H01F 41/0246 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A soft magnetic metal powder comprising coated particles, each of the coated particles comprises a soft magnetic metal particle including Fe and a coating part having an insulation property, wherein
the coating part is formed on a surface of the soft magnetic metal particle,
a soft magnetic metal fine particle exists inside the coating part and is completely surrounded by the coating part,
an aspect ratio of the soft magnetic metal fine particle is 1:2 to 1:10000,
the coating part includes at least one selected from the group consisting of a phosphate based glass, a bismuthate based glass and a borosilicate based glass, as a main component, and
a thickness of the coating part is 1 nm or more and 200 nm or less.