US 11,990,272 B2
Magnetic core, magnetic component, and electronic device
Kazuhiro Yoshidome, Tokyo (JP); and Hiroyuki Matsumoto, Tokyo (JP)
Assigned to TDK CORPORATION, Tokyo (JP)
Filed by TDK CORPORATION, Tokyo (JP)
Filed on Mar. 23, 2021, as Appl. No. 17/209,725.
Claims priority of application No. 2020-051884 (JP), filed on Mar. 23, 2020; and application No. 2021-003703 (JP), filed on Jan. 13, 2021.
Prior Publication US 2021/0296031 A1, Sep. 23, 2021
Int. Cl. H01F 3/08 (2006.01); B22F 1/052 (2022.01); B22F 1/07 (2022.01); B22F 1/16 (2022.01); C22C 45/02 (2006.01); H01F 1/147 (2006.01)
CPC H01F 3/08 (2013.01) [B22F 1/052 (2022.01); B22F 1/07 (2022.01); C22C 45/02 (2013.01); H01F 1/147 (2013.01); B22F 1/16 (2022.01); B22F 2304/10 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A magnetic core, comprising:
large particles that are soft magnetic particles having a Heywood diameter of 5 μm or more and 25 μm or less in a cross section of the magnetic core; and
small particles that are soft magnetic particles having a Heywood diameter of 0.5 μm or more and 3 μm or less in the cross section,
wherein 1.00≤A1≤1.50, 1.30≤A2≤2.50, and A1<A2 are satisfied,
where an average aspect ratio of the large particles is A1 and an average aspect ratio of the small particles is A2.