US 11,752,549 B2
Coil component
Masahiro Hachiya, Takasaki (JP); Hitoshi Matsuura, Takasaki (JP); Takayuki Arai, Takasaki (JP); Shuhei Kurahashi, Takasaki (JP); Hideo Machida, Takasaki (JP); Hidekazu Teshigawara, Takasaki (JP); and Naoya Honmo, Takasaki (JP)
Assigned to TAIYO YUDEN CO., LTD., Tokyo (JP)
Filed by TAIYO YUDEN CO., LTD., Tokyo (JP)
Filed on Jan. 15, 2021, as Appl. No. 17/150,979.
Application 17/150,979 is a continuation of application No. 15/828,061, filed on Nov. 30, 2017, granted, now 10,930,420.
Claims priority of application No. 2016-239069 (JP), filed on Dec. 9, 2016.
Prior Publication US 2021/0134506 A1, May 6, 2021
Int. Cl. H01F 17/00 (2006.01); H01F 27/255 (2006.01); H01F 27/28 (2006.01); H01F 17/04 (2006.01); H01F 27/29 (2006.01); B22F 1/08 (2022.01); H01F 1/20 (2006.01); H01F 1/24 (2006.01); H01F 1/36 (2006.01); B22F 1/16 (2022.01); B22F 1/102 (2022.01); H01F 41/02 (2006.01); H01F 41/04 (2006.01); H01F 1/147 (2006.01); B22F 7/02 (2006.01)
CPC B22F 1/08 (2022.01) [B22F 1/102 (2022.01); B22F 1/16 (2022.01); H01F 1/20 (2013.01); H01F 1/24 (2013.01); H01F 1/36 (2013.01); H01F 17/0013 (2013.01); H01F 17/0033 (2013.01); H01F 17/04 (2013.01); H01F 27/255 (2013.01); H01F 27/2804 (2013.01); H01F 27/292 (2013.01); B22F 7/02 (2013.01); B22F 2998/10 (2013.01); B22F 2999/00 (2013.01); H01F 1/14766 (2013.01); H01F 41/0246 (2013.01); H01F 41/04 (2013.01); H01F 2017/0066 (2013.01); H01F 2017/0093 (2013.01); H01F 2017/048 (2013.01); H01F 2027/2809 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A coil component comprising:
a magnetic body part comprising first and second magnetic layers stacked together alternately in a preset axis direction, and a cover part covering one side of a magnetic layer part composed of the first and second magnetic layers from the preset axis direction; and
a coil part having conductor patterns provided in the second magnetic layers;
wherein the magnetic body part including the first and second magnetic layers is comprised of the following two types of layers:
(A) an oblate soft magnetic grain-containing layer formed with oblate soft magnetic grains which are flattened in a thickness direction oriented in the preset axis direction, and
(B) a spherical grain-containing layer formed with insulative spherical grains,
wherein, in the magnetic layer part, the first magnetic layer is constituted by the type (A) layer which extends over the entire range of the magnetic body part except for a portion including the coil part in a direction perpendicular to the preset axis direction, and is exposed in the direction perpendicular to the preset axis direction; and the second magnetic layer is constituted by the type (B) layer which adjoins the type (A) layer in the preset axis direction,
wherein the cover part is constituted by multiple layers including one or more of the type (A) layer(s) and one or more of the type (B) layer(s) and extending over the entire range of the magnetic body part in the direction perpendicular to the preset axis direction.