US 12,217,902 B2
Coil component
Masataro Saito, Tokyo (JP); Hokuto Eda, Tokyo (JP); Kohei Takahashi, Tokyo (JP); Takamasa Iwasaki, Tokyo (JP); and Masazumi Arata, Tokyo (JP)
Assigned to TDK CORPORATION, Tokyo (JP)
Filed by TDK CORPORATION, Tokyo (JP)
Filed on Dec. 8, 2021, as Appl. No. 17/545,629.
Claims priority of application No. 2020-205811 (JP), filed on Dec. 11, 2020.
Prior Publication US 2022/0189682 A1, Jun. 16, 2022
Int. Cl. H01F 27/32 (2006.01); H01F 17/04 (2006.01); H01F 27/29 (2006.01)
CPC H01F 27/292 (2013.01) [H01F 17/04 (2013.01); H01F 27/324 (2013.01); H01F 2017/048 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A coil component comprising:
an element body including a magnetic material and having an upper surface and a lower surface parallel to each other;
a substrate disposed in the element body and extending parallel to the upper surface and the lower surface;
a first coil body disposed in the element body and formed on an upper surface of the substrate, the first coil body has a first planar coil and a first insulator, the first planar coil includes a first connection end, a first extraction end, and a first turn portion connecting the first connection end and the first extraction end, the first insulator covers the first planar coil in the same layer as the layer that the first planar coil is formed;
a second coil body disposed in the element body and formed on a lower surface of the substrate, the second coil body has a second planar coil and a second insulator, the second planar coil includes a second connection end connected to the first connection end of the first planar coil via the substrate, a second extraction end, and a second turn portion connecting the second connection end and the second extraction end, the second insulator covers the second planar coil in the same layer as the layer that the second planar coil is formed;
a pair of terminal electrodes provided on surfaces of the element body, the pair of terminal electrodes respectively connected to the first extraction end of the first planar coil and the second extraction end of the second planar coil;
wherein the substrate has an exposed substrate portion exposed from a first side surface connecting the upper surface and the lower surface of the element body,
wherein the first insulator has a first exposed insulator portion exposed from the first side surface of the element body and overlaps the exposed substrate portion on the first side surface, and
wherein the second insulator has a second exposed insulator portion exposed from the first side surface of the element body and overlaps the first exposed insulator portion on the first side surface via the exposed substrate portion.