US 11,657,950 B2
Magnetic composite sheet and coil component
Jong Ok Jeon, Suwon-si (KR); Jeong Ho Lim, Suwon-si (KR); Il Jin Park, Suwon-si (KR); Soon Kwang Kwon, Suwon-si (KR); and Gwang Hwan Hwang, Suwon-si (KR)
Assigned to SAMSUNG ELECTRO-MECHANICS CO., LTD., Suwon-si (KR)
Filed by SAMSUNG ELECTRO-MECHANICS CO., LTD., Suwon-si (KR)
Filed on Jun. 15, 2020, as Appl. No. 16/901,501.
Claims priority of application No. 10-2020-0008228 (KR), filed on Jan. 22, 2020.
Prior Publication US 2021/0225575 A1, Jul. 22, 2021
Int. Cl. H01F 27/255 (2006.01); H01F 17/04 (2006.01); H01F 27/32 (2006.01); H01F 1/24 (2006.01); H01F 1/26 (2006.01); H01F 17/00 (2006.01); H01F 1/153 (2006.01)
CPC H01F 27/255 (2013.01) [H01F 1/24 (2013.01); H01F 1/26 (2013.01); H01F 17/0013 (2013.01); H01F 17/04 (2013.01); H01F 27/32 (2013.01); H01F 1/15308 (2013.01); H01F 2017/048 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A coil component, comprising
a body and a coil portion embedded in the body,
wherein the body comprises:
a first magnetic particle comprising a core comprising a compound represented by Formula 1 below, and an oxide film comprising at least one of silicon (Si) or chromium (Cr) and directly deposited on a surface of the core;
a second magnetic particle having a larger diameter than the first magnetic particle; and
a third magnetic particle having a larger diameter than the second magnetic particle:
FeaSibCrc  [Formula 1]
where 3 atom %≤b≤6 atom %, 2.65 atom %≤c≤3.65 atom %, and a+b+C=100,
wherein each of the second and third magnetic particles comprises a metal particle and an insulating coating layer directly disposed on a surface of the second and third metal particles, wherein the insulating coating layer comprises an insulating resin.