US 11,854,733 B2
Coil component
Masataro Saito, Tokyo (JP); Masazumi Arata, Tokyo (JP); Hokuto Eda, Tokyo (JP); Kohei Takahashi, Tokyo (JP); and Takamasa Iwasaki, Tokyo (JP)
Assigned to TDK CORPORATION, Tokyo (JP)
Filed by TDK CORPORATION, Tokyo (JP)
Filed on Dec. 1, 2020, as Appl. No. 17/108,023.
Claims priority of application No. 2019-218752 (JP), filed on Dec. 3, 2019.
Prior Publication US 2021/0166858 A1, Jun. 3, 2021
Int. Cl. H01F 5/00 (2006.01); H01F 27/28 (2006.01); H01F 27/32 (2006.01); H01F 27/29 (2006.01)
CPC H01F 27/2804 (2013.01) [H01F 27/29 (2013.01); H01F 27/323 (2013.01); H01F 2027/2809 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A coil component, comprising:
an elementary body having a first end surface and a second end surface parallel to each other;
an insulating substrate provided in the elementary body, the insulating substrate having a through hole provided in a central portion thereof and being orthogonal to the first end surface and the second end surface and extending between the first end surface and the second end surface;
a first coil portion including a first planar coil pattern wound around the through hole of the insulating substrate, a second planar coil pattern wound around the through hole of the insulating substrate, and a first through conductor, the first planar coil pattern provided on one surface of the insulating substrate and wound around a magnetic core located on an equidistant line in which a distance from the first end surface and a distance from the second end surface are equal when seen in a thickness direction of the insulating substrate and having an inner end portion located on the equidistant line and an outer end portion extending to the first end surface of the elementary body, the second planar coil pattern provided on another surface of the insulating substrate and having an inner end portion overlapping the inner end portion of the first planar coil pattern and an outer end portion extending to the second end surface of the elementary body when seen in the thickness direction of the insulating substrate, the first through conductor piercing the insulating substrate in the thickness direction on the equidistant line when seen in the thickness direction of the insulating substrate and connecting the inner end portion of the first planar coil pattern to the inner end portion of the second planar coil pattern;
a second coil portion including a third planar coil pattern wound around the through hole of the insulating substrate, a fourth planar coil pattern wound around the through hole of the insulating substrate, and a second through conductor, the third planar coil pattern provided on the one surface of the insulating substrate to be wound parallel to the first planar coil pattern and having an inner end portion adjacent to the inner end portion of the first planar coil pattern on an outer peripheral side of the first planar coil pattern and an outer end portion extending to the first end surface of the elementary body on the equidistant line when seen in the thickness direction of the insulating substrate, the fourth planar coil pattern provided on the other surface of the insulating substrate and having an inner end portion overlapping the inner end portion of the third planar coil pattern and an outer end portion extending to the second end surface of the elementary body when seen in the thickness direction of the insulating substrate, the second through conductor piercing the insulating substrate in the thickness direction to be adjacent to the first through conductor on a same side of the elementary body relative to the through hole of the insulating substrate on the equidistant line when seen in the thickness direction of the insulating substrate and connecting the inner end portion of the third planar coil pattern to the inner end portion of the fourth planar coil pattern;
a first external terminal electrode provided on the first end surface of the elementary body and connected to the outer end portion of the first planar coil pattern;
a second external terminal electrode provided on the second end surface of the elementary body and connected to the outer end portion of the second planar coil pattern;
a third external terminal electrode provided on the first end surface of the elementary body and connected to the outer end portion of the third planar coil pattern; and
a fourth external terminal electrode provided on the second end surface of the elementary body and connected to the outer end portion of the fourth planar coil pattern.