US-12620522-B2 - Multilayer coil component

US12620522B2US 12620522 B2US12620522 B2US 12620522B2US-12620522-B2

Abstract

A plurality of electrode conductors included in a first external electrode and a second external electrode of a multilayer coil component includes a first part in a second direction and a second part in a third direction. A first electrode conductor and a third electrode conductor differ in at least any one dimension of four dimensions including a width of the first part, a length of the first part, a width of the second part, and a length of the second part. A second electrode conductor and a fourth electrode conductor differ in at least any one dimension of the four dimensions. The first electrode conductor and the second electrode conductor differ in at least any one dimension of the four dimensions. The third electrode conductor and the fourth electrode conductor differ in at least any one dimension of the four dimensions.

Inventors

Yuto SHIGA
Kazuya TOBITA
Youichi KAZUTA
Yuichi TAKUBO
So KOBAYASHI
Xuran GUO
Shunya Suzuki

Assignees

TDK CORPORATION

Dates

Publication Date: 20260505
Application Date: 20221221
Priority Date: 20211224

Claims (15)

1 . A multilayer coil component comprising: an element body including a main surface constituting a mounting surface, a first side surface and a second side surface opposing each other in a first direction, and a first end surface and a second end surface opposing each other in a second direction orthogonal to the first direction; a coil disposed inside the element body; and a first external electrode and a second external electrode electrically connected to the coil and disposed on the element body, wherein each of the first external electrode and the second external electrode includes a plurality of electrode conductors arranged in the first direction and connected to each other, wherein each of the plurality of electrode conductors includes a first part extending in the second direction and a second part extending in a third direction orthogonal to the second direction when viewed in the first direction, wherein the plurality of electrode conductors included in the first external electrode include a first electrode conductor and a second electrode conductor adjacent to each other in the first direction, wherein the plurality of electrode conductors included in the second external electrode include a third electrode conductor positioned at the same layer as the first electrode conductor, and a fourth electrode conductor positioned at the same layer as the second electrode conductor, wherein the first electrode conductor and the third electrode conductor differ from each other in at least any one dimension of four dimensions including a width of the first part in the third direction, a length of the first part in the second direction, a width of the second part in the second direction, and a length of the second part in the third direction, wherein the second electrode conductor and the fourth electrode conductor differ from each other in at least any one dimension of the four dimensions, wherein the first electrode conductor and the second electrode conductor differ from each other in at least any one dimension of the four dimensions, and wherein the third electrode conductor and the fourth electrode conductor differ from each other in at least any one dimension of the four dimensions.
2 . The multilayer coil component according to claim 1 , wherein the width of the first part of the first electrode conductor is smaller than the width of the first part of the second electrode conductor, wherein the length of the first part of the first electrode conductor is smaller than the length of the first part of the second electrode conductor, wherein the width of the second part of the first electrode conductor is smaller than the width of the second part of the second electrode conductor, and wherein the length of the second part of the first electrode conductor is smaller than the length of the second part of the second electrode conductor.
3 . The multilayer coil component according to claim 1 , wherein the width of the first part of the first electrode conductor is smaller than the width of the first part of the third electrode conductor, wherein the length of the first part of the first electrode conductor is smaller than the length of the first part of the third electrode conductor, wherein the width of the second part of the first electrode conductor is smaller than the width of the second part of the third electrode conductor, and wherein the length of the second part of the first electrode conductor is smaller than the length of the second part of the third electrode conductor.
4 . The multilayer coil component according to claim 2 , wherein the width of the first part of the first electrode conductor is smaller than the width of the first part of the third electrode conductor, wherein the length of the first part of the first electrode conductor is smaller than the length of the first part of the third electrode conductor, wherein the width of the second part of the first electrode conductor is smaller than the width of the second part of the third electrode conductor, and wherein the length of the second part of the first electrode conductor is smaller than the length of the second part of the third electrode conductor.
5 . The multilayer coil component according to claim 1 , wherein the width of the first part of the first electrode conductor is larger than the width of the first part of the second electrode conductor, wherein the length of the first part of the first electrode conductor is larger than the length of the first part of the second electrode conductor, wherein the width of the second part of the first electrode conductor is smaller than the width of the second part of the second electrode conductor, and wherein the length of the second part of the first electrode conductor is smaller than the length of the second part of the second electrode conductor.
6 . The multilayer coil component according to claim 5 , wherein the width of the first part of the first electrode conductor is larger than the width of the first part of the third electrode conductor, wherein the length of the first part of the first electrode conductor is larger than the length of the first part of the third electrode conductor, wherein the width of the second part of the first electrode conductor is smaller than the width of the second part of the third electrode conductor, and wherein the length of the second part of the first electrode conductor is smaller than the length of the second part of the third electrode conductor.
7 . The multilayer coil component according to claim 1 , wherein the plurality of electrode conductors included in the first external electrode include a fifth electrode conductor and a sixth electrode conductor adjacent to each other in the first direction, wherein the plurality of electrode conductors included in the second external electrode include a seventh electrode conductor positioned at the same layer as the fifth electrode conductor, and an eighth electrode conductor positioned at the same layer as the sixth electrode conductor, wherein the first electrode conductor is closest to the first side surface of the plurality of electrode conductors included in the first external electrode, and the fifth electrode conductor is closest to the second side surface of the plurality of electrode conductors included in the first external electrode, wherein the third electrode conductor is closest to the first side surface of the plurality of electrode conductors included in the second external electrode, and the seventh electrode conductor is closest to the second side surface of the plurality of electrode conductors included in the second external electrode, wherein the fifth electrode conductor and the seventh electrode conductor differ from each other in at least any one dimension of the four dimensions, wherein the sixth electrode conductor and the eighth electrode conductor differ from each other in at least any one dimension of the four dimensions, wherein the fifth electrode conductor and the sixth electrode conductor differ from each other in at least any one dimension of the four dimensions, and wherein the seventh electrode conductor and the eighth electrode conductor differ from each other in at least any one dimension of the four dimensions.
8 . The multilayer coil component according to claim 7 , wherein the length of the first part of the first electrode conductor is larger than the length of the first part of the second electrode conductor, wherein the length of the second part of the first electrode conductor is smaller than the length of the second part of the second electrode conductor, wherein the length of the first part of the fifth electrode conductor is smaller than the length of the first part of the sixth electrode conductor, and wherein the length of the second part of the fifth electrode conductor is larger than the length of the second part of the sixth electrode conductor.
9 . The multilayer coil component according to claim 7 , wherein the coil includes a plurality of coil conductors arranged in the first direction and connected to each other, wherein the plurality of coil conductors include a first coil conductor positioned at the same layer as the first electrode conductor and the third electrode conductor, and a second coil conductor positioned at the same layer as the fifth electrode conductor and the seventh electrode conductor, wherein each of the first coil conductor and the second coil conductor includes a third part constituting a portion of an annular trajectory in the coil, and a fourth part being continuous with the third part and protruding to an outward side of the annular trajectory when viewed in the first direction, wherein the fourth part of the first coil conductor is connected to the second part of the third electrode conductor, and the fourth part of the second coil conductor is connected to the second part of the fifth electrode conductor, wherein the length of the second part of the third electrode conductor is smaller than the length of the second part of the fourth electrode conductor, and wherein the length of the second part of the fifth electrode conductor is smaller than the length of the second part of the sixth electrode conductor.
10 . The multilayer coil component according to claim 8 , wherein the coil includes a plurality of coil conductors arranged in the first direction and connected to each other, wherein the plurality of coil conductors include a first coil conductor positioned at the same layer as the first electrode conductor and the third electrode conductor, and a second coil conductor positioned at the same layer as the fifth electrode conductor and the seventh electrode conductor, wherein each of the first coil conductor and the second coil conductor includes a third part constituting a portion of an annular trajectory in the coil, and a fourth part being continuous with the third part and protruding to an outward side of the annular trajectory when viewed in the first direction, wherein the fourth part of the first coil conductor is connected to the second part of the third electrode conductor, and the fourth part of the second coil conductor is connected to the second part of the fifth electrode conductor, wherein the length of the second part of the third electrode conductor is smaller than the length of the second part of the fourth electrode conductor, and wherein the length of the second part of the fifth electrode conductor is smaller than the length of the second part of the sixth electrode conductor.
11 . The multilayer coil component according to claim 1 , wherein the width of the first part of the first electrode conductor is larger than the width of the first part of the second electrode conductor, wherein the length of the first part of the first electrode conductor is smaller than the length of the first part of the second electrode conductor, wherein the width of the second part of the first electrode conductor is smaller than the width of the second part of the second electrode conductor, and wherein the length of the second part of the first electrode conductor is larger than the length of the second part of the second electrode conductor.
12 . The multilayer coil component according to claim 11 , wherein the width of the first part of the first electrode conductor is larger than the width of the first part of the third electrode conductor, wherein the length of the first part of the first electrode conductor is smaller than the length of the first part of the third electrode conductor, wherein the width of the second part of the first electrode conductor is smaller than the width of the second part of the third electrode conductor, and wherein the length of the second part of the first electrode conductor is larger than the length of the second part of the third electrode conductor.
13 . The multilayer coil component according to claim 1 , wherein the coil includes a plurality of coil conductors arranged in the first direction and connected to each other, wherein the plurality of coil conductors include a first coil conductor positioned at the same layer as the first electrode conductor and the third electrode conductor, wherein a shortest separation distance between the second part of the first electrode conductor and the first coil conductor is smaller than a shortest separation distance between the second part of the third electrode conductor and the first coil conductor, wherein the width of the second part of the first electrode conductor is smaller than the width of the second part of the third electrode conductor, and wherein the length of the second part of the first electrode conductor is smaller than the length of the second part of the third electrode conductor.
14 . The multilayer coil component according to claim 13 , wherein the plurality of coil conductors include a third coil conductor positioned at the same layer as the second electrode conductor and the fourth electrode conductor, wherein the shortest separation distance between the second part of the first electrode conductor and the first coil conductor is smaller than a shortest separation distance between the second part of the second electrode conductor and the third coil conductor, wherein the width of the second part of the first electrode conductor is smaller than the width of the second part of the second electrode conductor, and wherein the length of the second part of the first electrode conductor is smaller than the length of the second part of the second electrode conductor.
15 . The multilayer coil component according to claim 1 , wherein the first part of each of the plurality of electrode conductors includes a first end and a second end in the second direction, wherein the second part of each of the plurality of electrode conductors includes a first end and a second end in the third direction, wherein the first end of the first part and the first end of the second part are continuous with each other, and wherein a surface of each of the second end of the first part and the second end of the second part is curved when viewed in the first direction.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present disclosure relates to a multilayer coil component. 2. Description of Related Art Known multilayer coil components include an element body, a coil that is disposed inside the element body, and a pair of external electrodes that each include a plurality of electrode conductors connected to each other and disposed on the element body (for example, refer to Japanese Unexamined Patent Publication No. 2017-073536). SUMMARY OF THE INVENTION A multilayer coil component is mounted on an electronic instrument. For example, an electronic instrument includes a circuit board and an electronic component. When a multilayer coil component is mounted on an electronic instrument, an external force from the electronic instrument may act on an external electrode. In a multilayer coil component in which a fixing strength of an external electrode with respect to an element body is insufficient, when an external force from an electronic instrument acts on the external electrode, the external electrode may peel off from the element body. When an external electrode peels off from an element body, a multilayer coil component tends not to function as a coil. An object of an aspect of the present disclosure is to provide a multilayer coil component in which a fixing strength of an external electrode with respect to an element body is improved. A multilayer coil component according to one aspect of the present disclosure includes an element body, a coil, and a first external electrode and a second external electrode. The element body includes a main surface constituting a mounting surface, a first side surface and a second side surface opposing each other in a first direction, and a first end surface and a second end surface opposing each other in a second direction orthogonal to the first direction. The coil is disposed inside the element body. The first external electrode and the second external electrode are electrically connected to the coil and disposed on the element body. Each of the first external electrode and the second external electrode includes a plurality of electrode conductors arranged in the first direction and connected to each other. Each of the plurality of electrode conductors includes a first part extending in the second direction and a second part extending in a third direction orthogonal to the second direction when viewed in the first direction. The plurality of electrode conductors included in the first external electrode include a first electrode conductor and a second electrode conductor adjacent to each other in the first direction. The plurality of electrode conductors included in the second external electrode include a third electrode conductor positioned at the same layer as the first electrode conductor, and a fourth electrode conductor positioned at the same layer as the second electrode conductor. The first electrode conductor and the third electrode conductor differ from each other in at least any one dimension of four dimensions including a width of the first part in the third direction, a length of the first part in the second direction, a width of the second part in the second direction, and a length of the second part in the third direction. The second electrode conductor and the fourth electrode conductor differ from each other in at least any one dimension of the four dimensions. The first electrode conductor and the second electrode conductor differ from each other in at least any one dimension of the four dimensions. The third electrode conductor and the fourth electrode conductor differ from each other in at least any one dimension of the four dimensions. In the one aspect, the first electrode conductor differs from the third electrode conductor positioned in the same layer and the second electrode conductor adjacent thereto in the first direction in shape. The third electrode conductor differs from the fourth electrode conductor adjacent thereto in the first direction in shape. The second electrode conductor differs from the fourth electrode conductor positioned in the same layer in shape. In this case, surfaces of the first external electrode and the second external electrode opposing the element body have a complicated shape. The surfaces opposing the element body are surfaces coming into contact with the element body. Accordingly, an area of the first external electrode coming into contact with the element body and an area of the second external electrode coming into contact with the element body increase. Therefore, in the one aspect, fixing strengths of the first external electrode and the second external electrode with respect to the element body are improved. In the one aspect, the width of the first part of the first electrode conductor may be smaller than the width of the first part of the second electrode conductor. The length of the first part of the first electrode conductor may be smaller than the length of the f