US-20260128210-A1 - COIL COMPONENT

US20260128210A1US 20260128210 A1US20260128210 A1US 20260128210A1US-20260128210-A1

Abstract

A coil component includes a body having a first surface and a second surface opposing each other in a first direction, and a plurality of side surfaces connecting the first and second surfaces. The body includes a magnetic material and houses a coil. First and second external electrodes are spaced apart from each other on the body in a second direction and are connected to respective ends of the coil. The body further includes a molded portion in which the coil is disposed and a cover portion that contacts the molded portion. A relief pattern protrudes from the surface of the cover portion that faces the molded portion. When viewed in the first direction, at least a portion of the relief pattern overlaps the coil. The structure is designed to improve reliability by suppressing stress propagation and crack formation during manufacturing or operation.

Inventors

Tae Hyun Kim
Ju Hyoung PARK
Soon Kwang Kwon
Woo Jin Kim
Dong Jin Lee

Assignees

SAMSUNG ELECTRO-MECHANICS CO., LTD.

Dates

Publication Date: 20260507
Application Date: 20250829
Priority Date: 20241104

Claims (16)

1 . A coil component comprising: a body including a first surface and a second surface opposing each other in a first direction and a plurality of side surfaces connecting the first surface and the second surface and including a magnetic material; a coil disposed within the body; and first and second external electrodes disposed to be spaced apart from each other on the body in a second direction and connected to both ends of the coil, wherein the body includes a molded portion in which the coil is disposed and a cover portion including one surface in contact with the molded portion, a relief pattern protrudes from the one surface of the cover portion, and when viewed in the first direction, at least a portion of the relief pattern overlaps the coil.
2 . The coil component of claim 1 , wherein, when viewed in the first direction, the relief pattern has a radial shape from a center of the one surface of the cover portion to an outer portion.
3 . The coil component of claim 1 , wherein the molded portion includes a core penetrating through the coil.
4 . The coil component of claim 1 , wherein, when viewed in the first direction, the relief pattern overlaps the core.
5 . The coil component of claim 1 , further comprising: an insulating film covering the coil, wherein the relief pattern is in contact with the insulating film.
6 . The coil component of claim 1 , wherein the relief pattern does not penetrate through the coil.
7 . The coil component of claim 1 , wherein the cover portion further includes an other surface opposing the one surface in the first direction and a plurality of side surfaces connecting the one surface and the other surface, the other surface of the cover portion forms the second surface of the body, and the plurality of side surfaces of the cover portion form the plurality of side surfaces of the body.
8 . The coil component of claim 1 , wherein the cover portion includes a first magnetic metal particle, the molded portion includes a second magnetic metal particle, and the cover portion and the molded portion have different particle size distributions.
9 . The coil component of claim 1 , wherein the both ends of the coil extend to both sides facing each other in the second direction of the body.
10 . The coil component of claim 1 , wherein the molded portion includes one surface forming the first surface of the body, an other surface facing the one surface in the first direction and contacting the cover portion, and a plurality of side surfaces connecting the one surface and the other surface, and the cover portion covers the plurality of side surfaces of the molded portion.
11 . The coil component of claim 1 , wherein the relief pattern is spaced apart from the plurality of side surfaces of the body.
12 . The coil component of claim 1 , wherein the both ends of the coil extend to the first surface of the body.
13 . A coil component comprising: a body including a first surface and a second surface opposing each other in a first direction and a plurality of side surfaces connecting the first surface and the second surface and including a magnetic material; a coil disposed within the body and forming at least one turn; and first and second external electrodes disposed to be spaced apart from each other on the body in a second direction and connected to both ends of the coil, wherein the body includes a molded portion in which the coil is disposed and a cover portion including one surface in contact with the molded portion, a relief pattern protrudes from the one surface of the cover portion, and when viewed in the first direction, the relief pattern is spaced apart from the plurality of side surfaces of the body.
14 . The coil component of claim 13 , wherein the molded portion includes one surface forming the first surface of the body, an other surface facing the one surface in the first direction and contacting the cover portion, and a plurality of side surfaces connecting the one surface and the other surface, and the cover portion covers the plurality of side surfaces of the molded portion.
15 . The coil component of claim 13 , wherein the both ends of the coil extend to the first surface of the body.
16 . The coil component of claim 13 , wherein the relief pattern comprises a beam-like relief structure disposed on a lower surface of the cover portion.

Description

CROSS-REFERENCE TO RELATED APPLICATION(S) This application claims the benefit of priority to Korean Patent Application No. 10-2024-0154648 filed on Nov. 4, 2024 with the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference in its entirety. TECHNICAL FIELD The present disclosure relates to a coil component. Inductors, coil components, are representative passive electronic components used in electronic devices along with resistors and capacitors. Inductors applied to PC-related components, such as DDR 5, have been developed toward high efficiency and large sizes due to the characteristics of components using high currents. The body of a large inductor may be divided into a cover portion and a remaining portion in which a coil is disposed inside using a single mold. Cracks may occur therebetween due to differences in applied materials and pressing conditions. SUMMARY An aspect of the present disclosure is to provide a coil component with improved reliability by controlling crack occurrence in a magnetic body. According to an aspect of the present disclosure, a coil component includes: a body including a first surface and a second surface opposing each other in a first direction and a plurality of side surfaces connecting the first surface and the second surface and including a magnetic material; a coil disposed within the body; and first and second external electrodes disposed to be spaced apart from each other on the body in a second direction and connected to both ends of the coil, wherein the body includes a molded portion in which the coil is disposed and a cover portion including one surface in contact with the molded portion, a relief pattern protrudes from the one surface of the cover portion, and when viewed in the first direction, at least a portion of the relief pattern overlaps the coil. According to another aspect of the present disclosure, a coil component includes: a body including a first surface and a second surface opposing each other in a first direction and a plurality of side surfaces connecting the first surface and the second surface and including a magnetic material; a coil disposed within the body and forming at least one turn; and first and second external electrodes disposed to be spaced apart from each other on the body in a second direction and connected to both ends of the coil, wherein the body includes a molded portion in which the coil is disposed and a cover portion including one surface in contact with the molded portion, a relief pattern protrudes from the one surface of the cover portion, and when viewed in the first direction, the relief pattern is spaced apart from the plurality of side surfaces of the body. BRIEF DESCRIPTION OF DRAWINGS The above and other aspects, features, and advantages of the present disclosure will be more clearly understood from the following detailed description, taken in conjunction with the accompanying drawings, in which: FIG. 1 is a perspective view schematically illustrating a coil component according to an embodiment of the present disclosure; FIG. 2 is a cross-sectional view taken along line I-I′ of FIG. 1; FIG. 3 is a view viewed in an X-direction of FIG. 1; FIG. 4 is an enlarged view of each of A and B of FIG. 2; FIG. 5 is an enlarged view of each of A and B of FIG. 2 as a modified example; FIGS. 6A to 6E are views of a cover portion of FIG. 1 viewed in the X-direction; FIGS. 7A to 7E are views of the cover portion and coil of FIG. 1 viewed in the X-direction; FIG. 8 is a perspective view schematically illustrating a coil component according to another embodiment of the present disclosure; FIG. 9 is a cross-sectional view taken along line II-II′ of FIG. 8; and FIG. 10 is a view of FIG. 8 viewed in the X-direction. DETAILED DESCRIPTION The terms used herein to describe embodiments of the present disclosure are not intended to limit the scope of the present disclosure. The articles “a,” and “an” are singular in that they have a single referent, however the use of the singular form in the present document should not preclude the presence of more than one referent. In other words, elements of the present disclosure referred to in the singular may number one or more, unless the context clearly indicates otherwise. It will be further understood that the terms “comprise,” “comprising,” “include,” and/or “including,” when used herein, specify the presence of stated features, numbers, steps, operations, elements, and/or components but do not preclude the presence or addition of one or more other features, numbers, steps, operations, elements, components, and/or groups thereof. The terms used in the present specification are merely used to describe particular embodiments and are not intended to limit the present disclosure. An expression used in the singular encompasses the expression of the plural, unless it has a clearly different meaning in the context. In the present specification, it is to be understo