US 12,293,864 B2
Coil component and manufacturing method therefor
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. 17/504,330.
Claims priority of application No. 2020-177881 (JP), filed on Oct. 23, 2020.
Prior Publication US 2022/0130595 A1, Apr. 28, 2022
Int. Cl. H01F 27/28 (2006.01); H01F 5/00 (2006.01); H01F 17/00 (2006.01); H01F 17/02 (2006.01); H01F 27/29 (2006.01); H01F 27/32 (2006.01); H01F 41/12 (2006.01)
CPC H01F 27/2823 (2013.01) [H01F 5/003 (2013.01); H01F 17/0006 (2013.01); H01F 17/02 (2013.01); H01F 27/292 (2013.01); H01F 27/327 (2013.01); H01F 41/127 (2013.01); H01F 2017/004 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A coil component comprising:
an element body;
a coil pattern embedded in the element body and helically wound in a plurality of turns; and
first and second terminal electrodes provided on a surface of the element body and connected respectively to one and other ends of the coil pattern,
wherein the element body includes a support body having a cavity formed therein and a first insulating layer stacked on the support body so as to cover the cavity, thereby forming a hollow space inside the element body,
wherein the coil pattern includes a plurality of first sections formed along an inner wall of the cavity and a plurality of second sections formed on the first insulating layer,
wherein one ends of the plurality of first sections are connected respectively to their corresponding one ends of the plurality of second sections,
wherein other ends of the plurality of first sections are connected respectively to their corresponding other ends of the plurality of second sections,
wherein the first insulating layer is made of a resin-based insulating material,
wherein the element body further includes a third insulating layer made of a resin-based insulating material and covering the first insulating layer so as to embed the plurality of second sections therein,
wherein the first and second terminal electrodes are provided on the third insulating layer, and
wherein the resin-based insulating material constituting the third insulating layer is lower in relative permittivity than the resin-based insulating material constituting the first insulating layer.