US 12,476,039 B2
Coil component, circuit board, and electronic device
Kenji Atomura, Tokyo (JP); and Tomoo Kashiwa, Tokyo (JP)
Assigned to TAIYO YUDEN CO., LTD., Tokyo (JP)
Filed by TAIYO YUDEN CO., LTD., Tokyo (JP)
Filed on Mar. 24, 2022, as Appl. No. 17/703,658.
Claims priority of application No. 2021-058323 (JP), filed on Mar. 30, 2021.
Prior Publication US 2022/0319765 A1, Oct. 6, 2022
Int. Cl. H01F 5/00 (2006.01); H01F 27/24 (2006.01); H01F 27/29 (2006.01); H01F 27/32 (2006.01)
CPC H01F 27/29 (2013.01) [H01F 27/24 (2013.01); H01F 27/32 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A coil component comprising:
a magnetic base body; and a coil part provided in the magnetic base body, the coil part including (i) a first turn part extending around a coil axis that runs in an axial direction, (ii) a second turn part positioned outside the first turn part in a radial direction that is orthogonal to the axial direction and is centered on the coil axis, and (iii) an insulating coating film covering a surface of the coil part; wherein the first turn part has: a first inner peripheral surface; and a first outer peripheral surface facing the first inner peripheral surface and depressed inwardly in the radial direction when seen in a section of the coil component obtained by cutting the coil component along a plane passing through the coil axis, and wherein the second turn part has: a second inner peripheral surface facing the first outer peripheral surface and protruding inwardly in the radial direction when seen in the section; and a second outer peripheral surface facing the second inner peripheral surface.