US 12,462,970 B2
Coil component
Nobuyuki Okuzawa, Tokyo (JP); Kazuhiko Ito, Tokyo (JP); Munehiro Takaku, Tokyo (JP); and Junichiro Urabe, Tokyo (JP)
Assigned to TDK Corporation, Tokyo (JP)
Filed by TDK Corporation, Tokyo (JP)
Filed on Oct. 18, 2021, as Appl. No. 17/504,315.
Claims priority of application No. 2020-177158 (JP), filed on Oct. 22, 2020.
Prior Publication US 2022/0130601 A1, Apr. 28, 2022
Int. Cl. H01F 27/29 (2006.01); H01F 27/32 (2006.01)
CPC H01F 27/327 (2013.01) [H01F 27/292 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A coil component comprising:
a resin body having a first resin-based insulating material and a second resin-based insulating material lower in relative permittivity than the first resin-based insulating material;
a coil pattern embedded in the resin body and helically wound in a plurality of turns; and
first and second terminal electrodes formed on a surface of the resin body and connected respectively to one and other ends of the coil pattern,
wherein the coil pattern has a part covered with the first resin-based insulating material and another part covered with the second resin-based insulating material,
wherein the second resin-based insulating material is provided between the first and second terminal electrodes and the coil pattern, and the first resin-based insulating material is not provided therebetween,
wherein the first and second terminal electrodes are arranged in an axial direction of the coil pattern,
wherein the first and second terminal electrodes are formed on the surface of the resin body parallel to the axial direction without being formed on another surface thereof perpendicular to the axial direction,
wherein the resin body includes a first resin layer, a second resin layer formed on a surface of the first resin layer, and a third resin layer formed on a surface of the second resin layer,
wherein the first and third resin layers are made of the first resin-based insulating material, and the second resin layer is made of the second resin-based insulating material,
wherein the coil pattern includes:
a plurality of first horizontal sections provided on the surface of the first resin layer and embedded in the second resin layer;
a plurality of second horizontal sections provided on a surface of the third resin layer;
a plurality of first vertical sections penetrating the second and third resin layers and connecting each of one ends of the plurality of first horizontal sections to each of one ends of the plurality of second horizontal sections; and
a plurality of second vertical sections penetrating the second and third resin layers and connecting each of other ends of the plurality of first horizontal sections to each of other ends of the plurality of second horizontal sections,
wherein the resin body further includes a fourth resin layer formed on the surface of the third resin layer,
wherein the first and second terminal electrodes are provided on the fourth resin layer, and
wherein the fourth resin layer is made of the second resin-based insulating material.