US 12,191,062 B2
Magnetic core, inductor, and EMI filter comprising same
Hyun Min Nah, Seoul (KR); Taek Hoon Nam, Seoul (KR); and Sung San Kim, Seoul (KR)
Assigned to LG INNOTEK CO., LTD., Seoul (KR)
Filed by LG INNOTEK CO., LTD., Seoul (KR)
Filed on Nov. 2, 2023, as Appl. No. 18/386,286.
Application 18/386,286 is a continuation of application No. 17/673,144, filed on Feb. 16, 2022, granted, now 11,842,831.
Application 17/673,144 is a continuation of application No. 16/954,606, granted, now 11,289,259, issued on Mar. 29, 2022, previously published as PCT/KR2018/016326, filed on Dec. 20, 2018.
Claims priority of application No. 10-2017-0183905 (KR), filed on Dec. 29, 2017.
Prior Publication US 2024/0062941 A1, Feb. 22, 2024
Int. Cl. H01F 17/06 (2006.01); H01F 1/34 (2006.01); H01F 27/28 (2006.01); H01F 27/36 (2006.01); H03H 7/01 (2006.01)
CPC H01F 17/06 (2013.01) [H01F 1/344 (2013.01); H01F 27/28 (2013.01); H01F 27/363 (2020.08); H03H 7/0115 (2013.01)] 13 Claims
OG exemplary drawing
 
8. An EMI filter comprising:
a first magnetic body having a ring shape, and including an inner surface and an outer surface; and
a second magnetic body disposed on the inner surface and the outer surface of the first magnetic body,
wherein the second magnetic body comprises a metal ribbon and a resin material,
wherein the metal ribbon is wound in a plurality of layers along a centrifugal direction of the first magnetic body;
wherein the resin material comprises:
a first resin material to cover an upper surface, a lower surface, an inner surface, and an outer surface of the metal ribbon; and
a second resin material disposed in at least one portion of interlayer spaces of the plurality of layers of the metal ribbon.