Coil assembly

Abstract

A coil assembly includes a main body, a wound coil disposed in the main body and having a plurality of turns and first and second lead-out portions exposed to a surface of the main body, a noise removing portion spaced apart from the wound coil and including a pattern portion having first and second end portions spaced apart from each other and forming an open loop and a third lead-out portion connected to the pattern portion and exposed to one surface of the main body, an insulation layer disposed between the wound coil and the noise removing portion, and first, second, and third outer electrodes disposed on a surface of the main body, spaced apart from each other, and connected to the first, second, and third lead-out portions, respectively, wherein a wire width of one turn of the plurality of turns of the wound coil is greater than a thickness of the one turn.

Description

[0001] This application claims the benefit of priority to Korean Patent Application No. 10-2020-0060743, filed May 21, 2020, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein in its entirety by reference. TECHNICAL FIELD

[0002] The disclosure relates to a coil assembly. BACKGROUND

[0003] An inductor, a type of coil assembly, is a representative passive electronic component used in electronic devices along with resistors and capacitors.

[0004] As electronic devices have been designed to have high performance and reduced size, the number of coil assemblies used in electronic devices has increased and the size of coil assemblies has decreased.

[0005] For this reason, the need to remove noise, such as electromagnetic interference (EMI), in a wound coil assembly has increased. SUMMARY

[0006] An aspect of the disclosure is to provide a coil assembly in which noise can be easily removed.

[0007] According to an aspect of the disclosure, a coil assembly can include a main body having a first surface and a second surface opposite each other, a first end surface and a second end surface connecting the first surface to the second surface and opposite each other, and a first side surface and a second side surface connecting the first end surface to the second end surface and opposite each other; a wound coil disposed in the main body and having a plurality of turns and a first lead-out portion and a second lead-out portion exposed to the first end surface and the second end surface of the main body, respectively; a noise removal portion disposed in the main body and spaced apart from the wound coil and including a pattern portion having a first end portion and a second end portion spaced apart from each other and forming an open loop, and a third lead-out portion connected to the pattern portion and exposed to the first side surface of the main body; an insulation layer disposed between the wound coil and the noise removal portion; and a first external electrode, a second external electrode, and a third external electrode disposed on the first end surface, the second end surface, and the first side surface of the main body, respectively, spaced apart from each other, and connected to the first lead-out portion, the second lead-out portion, and the third lead-out portion, respectively, wherein a line width of a turn of the plurality of turns of the wound coil is greater than a thickness of the turn.

[0008] According to another aspect of the present disclosure, a coil component may include: a main body having a first surface and a second surface opposite to each other, a first end surface and a second end surface connecting the first surface to the second surface and opposite to each other, and a first side surface and a second side surface connecting the first end surface to the second end surface and opposite to each other; a winding coil arranged in the main body and having multiple turns and a first lead-out portion and a second lead-out portion, the first lead-out portion and the second lead-out portion being exposed to the first end surface and the second end surface of the main body, respectively; and a first noise removal portion and a second noise removal portion, respectively arranged on the opposite outermost turns of the winding coil and spaced apart from the winding coil, wherein the first noise removal portion and the second noise removal portion each include a pattern portion, the first end portion and the second end portion of the pattern portion are spaced apart from each other to form an open loop, and the first noise removal portion and the second noise removal portion respectively include a fourth lead-out portion and a third lead-out portion, the fourth lead-out portion and the third lead-out portion being connected to the corresponding pattern portion and exposed to the surface of the main body. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The above and other aspects, features and advantages of the present disclosure will be more clearly understood through the following detailed description taken in conjunction with the accompanying drawings, in which:

[0010] Figure 1 is a schematic perspective view showing a coil component according to a first embodiment of the present disclosure;

[0011] Figure 2 Shown from above Figure 1 A schematic diagram of the coil assembly shown in ;

[0012] Figure 3 is with Figure 2 The corresponding figure shows the Figure 1 A schematic diagram of the coil assembly shown in ;

[0013] Figure 4 is with Figure 2 Corresponding to the view from above Figure 1 A schematic diagram of the coil assembly shown in ;

[0014] Figure 5 It is along Figure 1 A cross-sectional view taken along line II' in FIG.

[0015] Figure 6 It is along Figure 1 A cross-sectional view taken along line II-II';

[0016] Figure 7 is along Figure 1A cross section taken along line II-II' in FIG. 1 corresponds to a schematic diagram illustrating a coil assembly according to a first modified example of the first embodiment;

[0017] Figure 8 is along Figure 1 A cross section taken along line II' in FIG. 1 corresponds to a schematic diagram illustrating a coil assembly according to a second modified example of the first embodiment;

[0018] Figure 9 is along Figure 1 A cross section taken along line II-II' in FIG. 1 corresponds to a schematic diagram illustrating a coil assembly according to a second modified example of the first embodiment;

[0019] Figure 10 is along Figure 1 A cross section taken along line II-II' in FIG. 1 corresponds to a schematic diagram illustrating a coil assembly according to a third modified example of the first embodiment;

[0020] Figure 11 is a schematic diagram showing a coil assembly according to a second embodiment;

[0021] Figure 12 It is along Figure 11 A cross-sectional view taken along line III-III';

[0022] Figure 13 It is along Figure 11 A cross-sectional view taken along line IV-IV';

[0023] Figure 14 is along Figure 11 A cross section taken along line IV-IV' in FIG. 1 corresponds to a schematic diagram illustrating a coil assembly according to a first modified example of the second embodiment;

[0024] Figure 15 is along Figure 11 A cross section taken along line III-III' in FIG. 1 corresponds to a schematic diagram illustrating a coil assembly according to a second modified example of the second embodiment;

[0025] Figure 16 is along Figure 11 A schematic diagram showing a coil component according to a second modified example of the second embodiment corresponds to a cross section taken along line IV-IV' in FIG.

[0026] Figure 17 is along Figure 11 A cross section taken along line IV-IV′ in FIG. 1 corresponds to a schematic diagram illustrating a coil component according to a third modified example of the second embodiment. DETAILED DESCRIPTION

[0027] Hereinafter, embodiments of the present disclosure will be described as follows with reference to the accompanying drawings.

[0028] The terms used in the following description are provided to explain specific exemplary embodiments and are not intended to be limiting. Unless otherwise indicated, singular terms include plural forms. The terms "comprise", "include", "be constructed to", etc. of the specification are used to indicate the presence of features, quantities, steps, operations, elements, parts, or combinations thereof, without excluding the possibility of combining or adding one or more features, quantities, steps, operations, elements, parts, or combinations thereof. In addition, the terms "disposed on...", "located on...", "mounted on...", etc. may indicate that an element may be disposed on another element or below another element, and do not necessarily indicate that an element is disposed only in the upper portion relative to the direction of gravity.

[0029] It will be understood that when an element is “coupled to,” “coupled to,” or “connected to” another element, it can be directly coupled to, directly coupled to, or directly connected to the other element, and / or intervening elements may be present between the element and the other element.

[0030] The sizes and thicknesses of elements shown in the drawings are merely examples to help understanding the technical contents of the present disclosure.

[0031] In the drawings, the X direction is a first direction or a length direction, the Y direction is a second direction or a width direction, and the Z direction is a third direction or a thickness direction.

[0032] In the drawings, the same elements will be designated by the same reference numerals, and repeated description will not be provided.

[0033] In electronic devices, various types of electronic components may be used, and various types of coil components may be used between the electronic components to remove noise and for other purposes.

[0034] In electronic devices, the coil assembly may be used as a power inductor, a high frequency (HF) inductor, a general ferrite bead, a high frequency (eg, GHz) ferrite bead, a common mode filter, and the like.

[0035] First embodiment and its modified examples

[0036] Figure 1 is a schematic perspective view showing a coil component according to a first embodiment. Figure 2 Shown from above Figure 1 Schematic diagram of the coil assembly shown in . Figure 3 is with Figure 2 The corresponding figure shows the Figure 1 Schematic diagram of the coil assembly shown in . Figure 4 is with Figure 2Corresponding to the view from above Figure 1 Schematic diagram of the coil assembly shown in . Figure 5 It is along Figure 1 A cross-sectional view taken along line II' in FIG. Figure 6 It is along Figure 1 A cross-sectional view taken along line II-II'. Figure 1 The insulating layer applied to this embodiment is not shown to clearly illustrate the bonding between other elements.

[0037] Reference Figures 1 to 6 The coil component 1000 of the first exemplary embodiment may include a body 100, a wound coil 200, a noise remover 400, and first, second, third, and fourth external electrodes 510, 520, 530, and 540. In addition, the coil component 1000 may further include an insulating layer.

[0038] The body 100 may form an exterior of the coil component 1000 and may include the wound coil 200 disposed therein.

[0039] The body 100 may have a hexahedral shape.

[0040] The body 100 may include a first surface 101 and a second surface 102 opposing each other in the length direction (X), a third surface 103 and a fourth surface 104 opposing each other in the width direction (Y), and a fifth surface 105 and a sixth surface 106 opposing each other in the thickness direction (Z). In the following description, the two end surfaces of the body 100 may be referred to as the first surface 101 and the second surface 102, and the two side surfaces of the body 100 may be referred to as the third surface 103 and the fourth surface 104. In addition, one surface and the other surface of the body 100 may be referred to as the fifth surface 105 and the sixth surface 106 of the body 100, respectively.

[0041] The body 100 may be constructed so that the coil assembly 1000 (including the outer electrodes 510, 520, 530, and 540 disposed therein) may have a length of 2.0 mm, a width of 1.2 mm, and a thickness of 0.65 mm, but exemplary embodiments thereof are not limited thereto. The above dimensions are merely design dimensions that do not reflect process errors, and the range recognized as process errors may be included in the scope of the present disclosure.

[0042] The main body 100 may include a magnetic material and a resin. For example, the main body 100 may be formed by laminating one or more magnetic material sheets including a resin and a magnetic material dispersed in the resin. The main body 100 may also have a structure different from a structure in which the magnetic material is disposed in the resin. For example, the main body 100 may be formed using a magnetic material such as ferrite.

[0043] The magnetic material can be ferrite powder or magnetic metal powder.

[0044] The ferrite powder may be, for example, one or more of spinel ferrite (such as Mg-Zn-based ferrite, Mn-Zn-based ferrite, Mn-Mg-based ferrite, Cu-Zn-based ferrite, Mg-Mn-Sr-based ferrite, Ni-Zn-based ferrite, etc.), hexagonal ferrite (such as Ba-Zn-based ferrite, Ba-Mg-based ferrite, Ba-Ni-based ferrite, Ba-Co-based ferrite, Ba-Ni-Co-based ferrite, etc.), garnet ferrite (such as Y-based ferrite) and Li-based ferrite.

[0045] The magnetic metal powder may include one or more selected from the group consisting of iron (Fe), silicon (Si), chromium (Cr), cobalt (Co), molybdenum (Mo), aluminum (Al), niobium (Nb), copper (Cu), and nickel (Ni). For example, the magnetic metal powder may be one or more of pure iron powder, Fe-Si based alloy powder, Fe-Si-Al based alloy powder, Fe-Ni based alloy powder, Fe-Ni-Mo based alloy powder, Fe-Ni-Mo-Cu based alloy powder, Fe-Co based alloy powder, Fe-Ni-Co based alloy powder, Fe-Cr based alloy powder, Fe-Cr-Si based alloy powder, Fe-Si-Cu-Nb based alloy powder, Fe-Ni-Cr based alloy powder, and Fe-Cr-Al based alloy powder.

[0046] The magnetic metal powder may be amorphous or crystalline. For example, the magnetic metal powder may be Fe-Si-B-Cr based amorphous alloy powder, but exemplary embodiments thereof are not limited thereto.

[0047] An average diameter of each of the ferrite powder and the magnetic metal powder may be 0.1 μm to 30 μm, but exemplary embodiments thereof are not limited thereto.

[0048] The body 100 may include two or more different types of magnetic materials provided in the resin. The concept of including different types of magnetic materials means that the magnetic materials can be distinguished from each other by one of average diameter, composition, crystallinity, and shape.

[0049] The resin may include one or a combination of epoxy resin, polyimide resin, silicone resin, silicone rubber, phenolic resin, urea resin, melamine resin, polyvinyl alcohol (PVA), acrylic resin, liquid crystal polymer, etc., but exemplary embodiments thereof are not limited thereto.

[0050] For example, the main body 100 can be formed by high-pressure pressing the amorphous alloy powder and the resin using the above-described resin as a binder. In general, a pancake coil can refer to a coil wound such that a plurality of turns (coils) are stacked with a short side of a rectangular wire as an inner diameter surface. When a pancake coil is used as in the exemplary embodiment, a wire width W of one of the plurality of turns of the wound coil 200 can be greater than the thickness t. Accordingly, compared to an example in which the wire width of one of the plurality of turns is less than or equal to the thickness, direct current resistance (Rdc) can be reduced, and thus heat and copper loss that occur at the time of pressing can be prevented.

[0051] The wound coil 200 can be configured to be wound around the core 110 and can be disposed in the main body 100 and can exhibit the performance of the coil assembly. For example, when the coil assembly 1000 is used as a power inductor, the wound coil 200 can store an electric field as a magnetic field and can maintain an output voltage, thereby stabilizing the power of an electronic device.

[0052] The wound coil 200 can include a plurality of layers. Each of the plurality of layers of the wound coil 200 can be configured to have a planar spiral shape and can have a plurality of turns. The plurality of turns can include an outermost turn adjacent to the fifth surface 105 and the sixth surface 106 of the main body 100 and an innermost turn adjacent to the central portion of the main body 100.

[0053] The wound coil 200 can be configured as a rectangular coil. The wound coil 200 can be formed by coiling a metal wire such as a copper wire into a spiral shape. As described below, an insulating layer can be disposed on a surface of each of the plurality of turns of the wound coil 200.

[0054] The wound coil 200 can be connected to the first lead-out portion 210 and the second lead-out portion 220 and can be connected to the first external electrode 510 and the second external electrode 520. The first lead-out portion 210 and the second lead-out portion 220 can be exposed to the first surface 101 and the second surface 102 of the main body 100, respectively, and can connect the wound coil 200 to the first external electrode 510 and the second external electrode 520.

[0055] The insulating layer can be disposed between the wound coil 200 and the noise removing portion 400. Referring to FIG. 1, the insulating layer 300 can be disposed between the wound coil 200 and the noise removing portion 400. The insulating layer 300 can be disposed on a surface of the wound coil 200 and a surface of the noise removing portion 400. Figure 5The insulating layer may include an insulating film 330 disposed along the surface of each of the multiple turns of the winding coil 200 and disposed between the outermost turn of the winding coil 200 and the noise removal portion 400. Specifically, the insulating film 330 may be disposed between the outermost turn of the winding coil 200 adjacent to the sixth surface 106 of the main body 100 and the first noise removal pattern 410, and may be disposed between the outermost turn adjacent to the fifth surface 105 of the main body and the second noise removal pattern 420. The insulating film 330 may be provided to protect and insulate the multiple turns of the winding coil 200 and may include a commonly used insulating material (such as parylene). Any insulating material may be used as the insulating material included in the insulating film 330, and the insulating material included in the insulating film 330 is not limited to any specific material. The insulating film 330 may be formed by a method such as vapor deposition, but the method is not limited thereto. In this case, when the wound coil 200 is capacitively coupled with the noise removing patterns 410 and 420 of the noise removing part 400 , the insulating film 330 may serve as a dielectric layer.

[0056] The noise removal unit 400 may be provided in the body 100 to dissipate noise transmitted to the components and / or noise generated in the components to a mounting substrate, etc. Specifically, the noise removal unit 400 may be buried in the body 100 and may be provided on the winding coil 200, and may form an open loop so that one end thereof may be exposed to the surface of the body 100.

[0057] Reference Figures 2 to 6The noise removal portion 400 may be provided on each of the outermost turns of the wound coil 200 and may include a first noise removal pattern 410 and a second noise removal pattern 420, each forming an open loop. Specifically, the first noise removal pattern 410 may include a first pattern portion 411, wherein a first end portion 4111 and a second end portion 4112 of the first pattern portion 411 may be spaced apart from each other and may form an open loop; and a fourth lead portion 412 connected to the first pattern portion 411, with one surface of the fourth lead portion 412 exposed to the fourth surface 104 of the main body 100. The second noise removal pattern 420 may include a second pattern portion 421, wherein a first end portion 4211 and a second end portion 4212 of the second pattern portion 421 may be spaced apart from each other and may form an open loop; and a third lead portion 422 connected to the second pattern portion 421, with one surface of the third lead portion 422 exposed to the third surface 103 of the main body 100. Therefore, in an exemplary embodiment, a gap S may be formed between the first end 4111 and the second end 4112 of the first pattern portion 411 and between the first end 4211 and the second end 4212 of the second pattern portion 421. The gap S in an exemplary embodiment may refer to a spacing between the first ends 4111 and 4211 and the second ends 4112 and 4212 of the pattern portions 411 and 421, respectively. The gap S may refer to a three-dimensional space that physically separates the first ends 4111 and 4211 and the second ends 4112 and 4212 of the pattern portions 411 and 421 from each other so that the noise removal portion 400 does not form a closed loop.

[0058] In an exemplary embodiment, the noise removal portion 400 may be formed into turns corresponding to the area where the winding coil 200 is disposed. In an exemplary embodiment, each of the first pattern portion 411 and the second pattern portion 421 may be formed into turns corresponding to the winding coil 200 and may have a ring shape with a slit S formed therein. Furthermore, the line width of the noise removal portion 400 may be configured to be greater than its thickness. Therefore, the line width of the first noise removal pattern 410 may be greater than its thickness, and the line width of the second noise removal pattern 420 may be greater than its thickness. Although not shown in detail, the noise removal portion 400 may also be provided only on one of the outermost turns of the winding coil 200. When noise removal is not required, the noise removal portion 400 may be selectively provided only on one of the outermost turns of the winding coil 200. This can reduce material costs and relatively increase the proportion of magnetic material in a component of the same size, thereby improving component performance.

[0059] Reference Figure 4, the distance from the second end portion 4212 of the second pattern portion 421 to the third surface 103 of the body 100 may be the same as the distance from the first end portion 4211 of the second pattern portion 421 to the third surface 103 of the body 100. Figure 3 The distance from the second end 4212 of the second pattern section 421 to the third surface 103 of the main body 100 may be shorter than the distance from the first end 4211 of the second pattern section 421 to the fourth surface 104 of the main body 100. Therefore, the gap S may be provided closer to the side of the third surface 103 of the main body 100 than to the side of the fourth surface 104 of the main body 100. In an exemplary embodiment, the distance from the second end 4212 of the second pattern section 421 to one surface of the main body 100 refers to the shortest distance from the center of the second end 4212 of the second pattern section 421 to the one surface of the main body 100, and the distance from the first end 4211 of the second pattern section 421 to one surface of the main body 100 refers to the shortest distance from the center of the first end 4211 of the second pattern section 421 to the one surface of the main body 100. In the exemplary embodiment, for ease of description, only the example of the second pattern section 421 is described, but the same description applies to the first pattern section 411.

[0060] Reference Figures 2 to 5 , the size of the area where the noise removal part 400 overlaps with the outermost turn of the wound coil 200 in the thickness direction (Z direction) of the body 100 may be larger than the size of the area where the outermost turn of the wound coil 200 does not overlap with the noise removal part 400. For example, the size may refer to the width of the area or the area of ​​the area, but the embodiment is not limited thereto. Figure 5 , the size S1 of the cross section of the area where the second noise removal pattern 420 overlaps the outermost turn of the wound coil 200 adjacent to the fifth surface 105 of the main body 100 may be greater than the sizes S2 and S2' of the cross section of the area where the outermost turn of the wound coil 200 adjacent to the fifth surface 105 of the main body 100 does not overlap with the second noise removal pattern 420. In an exemplary embodiment, the ratio of the size of the area of ​​the outermost turn of the wound coil 200 that does not overlap with the noise removal portion 400 relative to the size of the area where the noise removal portion 400 overlaps with the outermost turn of the wound coil 200 may be 20% or less ((S2+S2') / S1≤0.2). When the ratio of the size of the non-overlapping area to the size of the overlapping area exceeds 20%, the noise removal function of the present disclosure may be degraded.

[0061] Conventional coil assemblies that do not include a noise removal unit can easily pass low-frequency signals from the DC current, but the noise removal effect quickly deteriorates at frequencies higher than the self-resonant frequency (SRF). Unlike the above example, in the exemplary embodiment in which the noise removal unit 400 is disposed adjacent to the wound coil 200, low-frequency signals from the DC current can be passed relatively easily, while unnecessary noise with high frequencies can be effectively blocked, compared to conventional coil assemblies.

[0062] Reference Figure 1 and Figure 2 , the third lead portion 422 may be exposed to the third surface 103 of the body 100. Specifically, the second noise removal pattern 420 may include a third lead portion 422 connected to the second pattern portion 421 and exposed to the third surface 103 of the body 100. The first noise removal pattern 410 may include a fourth lead portion 412 connected to the first pattern portion 411 and exposed to the fourth surface 104 of the body 100 so as to be spaced apart from the third lead portion 422. The third lead portion 422 may contact and be connected to the third external electrode 530 provided on the third surface 103 of the body 100. In an exemplary embodiment, the fourth lead portion 412 may be exposed to the fourth surface 104 of the body 100 and may be connected to the fourth external electrode 540. When the coil component 1000 of the exemplary embodiment is mounted on a mounting substrate, the third external electrode 530 and the fourth external electrode 540 may be connected to the ground portion of the mounting substrate, or when the coil component 1000 of the exemplary embodiment is packaged in an electronic component package, the third external electrode 530 and the fourth external electrode 540 may be connected to the ground portion of the electronic component package. Therefore, in the exemplary embodiment, even when one of the third external electrode 530 and the fourth external electrode 540 connected to the ground portion of the mounting substrate is disconnected from the mounting substrate, noise can be removed.

[0063] The noise removal patterns 410 and 420 may include a conductive material such as copper (Cu), aluminum (Al), silver (Ag), tin (Sn), gold (Au), nickel (Ni), lead (Pb), titanium (Ti), or an alloy thereof, but exemplary embodiments thereof are not limited thereto. The noise removal patterns 410 and 420 and the slit S may be formed by a method including at least one of an electroless plating method, an electrolytic plating method, a vapor deposition method (such as a sputtering method), and an etching method, but the method is not limited thereto.

[0064] The first and second external electrodes 510 and 520 may be disposed on the first and second surfaces 101 and 102 of the body 100, respectively, and may be connected to the wound coil 200. Figure 5 and Figure 6The first external electrode 510 may be in contact with and connected to the first lead-out portion 210 exposed to the first surface 101 of the body 100. The second external electrode 520 may be in contact with and connected to the second lead-out portion 220 exposed to the second surface 102 of the body 100. The first external electrode 510 and the second external electrode 520 may be configured to extend from the first surface 101 and the second surface 102 of the body 100 to the sixth surface 106 of the body 100, respectively. Figure 1 The examples of the first external electrode 510 and the second external electrode 520 shown in other figures are merely examples, and each of the external electrodes 510 and 520 may also be constructed to partially extend to each of the third surface 103, the fourth surface 104 and the fifth surface 105 of the body 100, and may have a C-shaped form.

[0065] When the coil component 1000 is mounted on a mounting substrate (such as a printed circuit board), the first external electrode 510 and the second external electrode 520 can electrically connect the coil component 1000 of the exemplary embodiment to the mounting substrate. As an example, the coil component 1000 of the exemplary embodiment can be mounted so that the sixth surface 106 of the main body 100 can point to the upper surface of the printed circuit board, and the connection portions of the external electrodes 510 and 520 extending to the sixth surface 106 of the main body 100 and the printed circuit board can be electrically connected to each other by a conductive bonding member (such as solder).

[0066] The first external electrode 510, the second external electrode 520, the third external electrode 530, and the fourth external electrode 540 may include at least one of a conductive resin layer and an electroplating layer. The conductive resin layer may be formed by a paste printing process, etc., and may include a thermosetting resin and one or more conductive metals selected from the group consisting of copper (Cu), nickel (Ni), and silver (Ag). The electroplating layer may include one or more selected from the group consisting of nickel (Ni), copper (Cu), and tin (Sn).

[0067] Figure 7 is along Figure 1 A cross section taken along line II-II′ in FIG. 1 corresponds to a schematic diagram illustrating a coil component according to a first modified example of the first embodiment. Figure 8 is along Figure 1 A cross section taken along line II′ in FIG. 1 corresponds to a schematic diagram illustrating a coil component according to a second modified example of the first embodiment. Figure 9 is along Figure 1 Schematic diagram showing a coil component according to a second modified example of the first embodiment, taken along line II-II′ in FIG. Figure 10 is along Figure 1 A cross section taken along line II-II′ in FIG. 1 corresponds to a schematic diagram illustrating a coil component according to a third modified example of the first embodiment.

[0068] Reference Figure 7 In a first modified example of the first embodiment, the fourth lead portion 412 of the first noise removing pattern 410 may be exposed to the third surface 103 of the body 100, and the third lead portion 422 of the second noise removing pattern 420 may be exposed to the third surface 103 of the body 100. Furthermore, the fourth lead portion 412 of the first noise removing pattern 410 may contact and be connected to the third external electrode 530 disposed on the third surface 103 of the body 100, and the third lead portion 422 of the second noise removing pattern 420 may contact and be connected to the third external electrode 530 disposed on the third surface 103 of the body 100. In a modified example, a fourth external electrode 540 disposed on the fourth surface 104 of the body 100 may be included, and in the modified example, the fourth external electrode 540 may function as a non-contact terminal and may be connected to a ground portion of the mounting substrate or a ground portion of the package.

[0069] Reference Figure 8 and Figure 9 In a second modified example, the insulating layer may further include additional insulating layers 310 and 320 provided between the insulating film 330 and the noise removal portion 400. When the insulating film 330 is formed on the surface of the wound coil 200, since the multiple turns of the wound coil 200 are formed in a spiral shape, the gap between the insulating film 330 and the noise removal portion 400 may not be constant. Therefore, due to the deviation in the thickness of the interval between the insulating film 330 formed on the outermost turn of the wound coil 200 and the noise removal portion 400, the noise removal function may be deteriorated. As in the exemplary embodiment, when the first additional insulating layer 310 is formed on the lower surface of the outermost turn of the wound coil 200 adjacent to the sixth surface 106 of the main body 100 and the second additional insulating layer 320 is formed on the upper surface of the outermost turn of the wound coil 200 adjacent to the fifth surface 105 of the main body 100, the noise removal function can be further enhanced. The first additional insulating layer 310 and the second additional insulating layer 320 can be formed by stacking an insulating film on each of the outermost turns of the wound coil 200 on which the insulating film 330 is formed. The insulating film can be a conventional non-photosensitive insulating film (such as ABF (Ajinomoto build-up film) or a prepreg), or can be a photosensitive insulating film (such as a dry film or photosensitive dielectric (PID)). In this case, when the wound coil 200 is capacitively coupled with the noise removal patterns 410 and 420 of the noise removal unit 400, the first additional insulating layer 310 and the second additional insulating layer 320 can function as a dielectric layer together with the insulating film 330.

[0070] Reference Figure 10In the third modified example, the fourth lead-out portion 412 may be exposed to the third surface 103 of the body and may be connected to the third external electrode 530 .

[0071] Second embodiment and its modified examples

[0072] Figure 11 is a schematic diagram showing a coil component according to a second embodiment. Figure 12 It is along Figure 11 A cross-sectional view taken along line III-III'. Figure 13 It is along Figure 11 A cross-sectional view taken along line IV-IV' in FIG. Figure 11 The insulating layer applied to the second embodiment is not shown to clearly illustrate the coupling between other elements.

[0073] Reference Figures 11 to 13 In the coil component 2000 of the exemplary embodiment, the shapes of the third external electrode 530 and the fourth external electrode 540 may differ from the shapes of the third external electrode 530 and the fourth external electrode 540 of the coil component 1000 described in the first embodiment. Therefore, when describing this embodiment, only the shapes of the third external electrode 530 and the fourth external electrode 540 that differ from those of the first embodiment will be described. The description of other elements in the first embodiment can be applied to the same other elements of this embodiment.

[0074] Reference Figures 11 to 13 , the third external electrode 530 and the fourth external electrode 540 in exemplary embodiments may be connected to each other on the sixth surface 106 of the body 100 .

[0075] Specifically, the end portion of the third external electrode 530 extending onto the sixth surface 106 of the main body 100 may contact and be connected to the end portion of the fourth external electrode 540 extending onto the sixth surface 106 of the main body 100. When the coil assembly 2000 is mounted on a mounting substrate (such as a printed circuit board), the sixth surface 106 of the main body 100 may be the mounting surface. A plurality of signal pads and a plurality of ground pads may be formed on the surface of the mounting substrate to connect to the assembly. In an exemplary embodiment, since the third external electrode 530 and the fourth external electrode 540 are configured to be connected to each other on the sixth surface 106 of the main body 100, the ground pads of the mounting substrate and the noise removal patterns 410 and 420 can be easily connected to each other. Therefore, the mounting process can be easily performed.

[0076] Figure 14 is along Figure 11 A cross section taken along line IV-IV′ in FIG. 1 corresponds to a schematic diagram illustrating a coil component according to a first modified example of the second embodiment.

[0077] Reference Figure 14 , the third external electrode 530 and the fourth external electrode 540 in the modified example may be configured to surround the third surface 103, the sixth surface 106, and the fourth surface 104 of the body 100. In the modified example, the third external electrode 530 and the fourth external electrode 540 connected to the noise removal patterns 410 and 420 may be easily formed on the surface of the body 100. In other words, the third external electrode 530 and the fourth external electrode 540 may be easily formed using a printing method such as a screen printing method. Alternatively, even when the third external electrode 530 and the fourth external electrode 540 are formed using a plating method, the third external electrode 530 and the fourth external electrode 540 may be easily formed by relatively simply patterning a plating resist.

[0078] Figure 15 is along Figure 11 A cross section taken along line III-III′ in FIG. 1 corresponds to a schematic diagram illustrating a coil component according to a second modified example of the second embodiment. Figure 16 is along Figure 11 A cross section taken along line IV-IV′ in FIG. 1 corresponds to a schematic diagram illustrating a coil component according to a second modified example of the second embodiment.

[0079] Reference Figure 15 and Figure 16 , the third external electrode 530 and the fourth external electrode 540 in the modified example may be configured to surround the third surface 103, the sixth surface 106, and the fourth surface 104 of the body 100. In the modified example, the third external electrode 530 and the fourth external electrode 540 connected to the noise removal patterns 410 and 420 may be easily formed on the surface of the body 100. In other words, the third external electrode 530 and the fourth external electrode 540 may be easily formed using a printing method such as a screen printing method. Alternatively, even when the third external electrode 530 and the fourth external electrode 540 are formed using a plating method, the third external electrode 530 and the fourth external electrode 540 may be easily formed by relatively simply patterning a plating resist.

[0080] Figure 17 is along Figure 11 A cross section taken along line IV-IV′ in FIG. 1 corresponds to a schematic diagram illustrating a coil component according to a third modified example of the second embodiment.

[0081] Reference Figure 17, the third external electrode 530 and the fourth external electrode 540 in the modified example may be configured to surround the third surface 103, the sixth surface 106, and the fourth surface 104 of the body 100. In the modified example, the third external electrode 530 and the fourth external electrode 540 connected to the noise removal patterns 410 and 420 may be easily formed on the surface of the body 100. In other words, the third external electrode 530 and the fourth external electrode 540 may be easily formed using a printing method such as a screen printing method. Alternatively, even when the third external electrode 530 and the fourth external electrode 540 are formed using a plating method, the third external electrode 530 and the fourth external electrode 540 may be easily formed by relatively simply patterning a plating resist.

[0082] Although not shown in the drawings, the exemplary embodiment can also be modified similarly to the modified example of the first embodiment.

[0083] According to the aforementioned exemplary embodiments, noise can be easily removed.

[0084] While exemplary embodiments have been shown and described above, it will be apparent to those skilled in the art that modifications and variations may be made without departing from the scope of the present disclosure as defined by the appended claims.

Claims

1. A coil assembly comprising: a main body having a first surface and a second surface opposite to each other, a first end surface and a second end surface connecting the first surface to the second surface and opposite to each other, and a first side surface and a second side surface connecting the first end surface to the second end surface and opposite to each other; a winding coil disposed in the main body and having a plurality of turns and a first lead-out portion and a second lead-out portion, the first lead-out portion and the second lead-out portion being exposed to the first end surface and the second end surface of the main body, respectively; a noise removal portion provided in the body and spaced apart from the wound coil, and comprising a second noise removal pattern, the second noise removal pattern comprising a pattern portion and a third lead-out portion, the pattern portion having a first end and a second end spaced apart from each other and forming an open loop, the third lead-out portion being connected to the pattern portion and exposed to the first side surface of the body, and the second noise removal pattern being spaced apart from the second side surface of the body; an insulating layer provided between the winding coil and the noise removal portion; as well as a first external electrode, a second external electrode, and a third external electrode, respectively disposed on the first end surface, the second end surface, and the first side surface of the body, spaced apart from each other, and respectively connected to the first lead portion, the second lead portion, and the third lead portion; Wherein, the line width of one turn among the multiple turns of the wound coil is greater than the thickness of the one turn.

2. The coil assembly according to claim 1, wherein A line width of the noise removal portion is greater than a thickness of the noise removal portion.

3. The coil assembly according to claim 1, wherein The noise removing portion forms turns corresponding to an area where the winding coil is provided.

4. The coil assembly according to claim 1, wherein The noise removing portion includes a conductive material.

5. The coil assembly according to any one of claims 1 to 4, wherein: A gap is defined between the first end portion and the second end portion of the pattern portion. The coil assembly according to claim 5 , wherein: The slit is provided closer to the first side surface of the body than to the second side surface of the body.

7. The coil assembly according to claim 5, wherein A distance from the first end portion of the pattern portion to the first side surface of the main body is the same as a distance from the second end portion of the pattern portion to the first side surface of the main body.

8. The coil assembly according to claim 5, wherein The slit is arranged on the noise removing portion such that the second end portion of the pattern portion shares a surface with the third lead-out portion.

9. The coil assembly according to any one of claims 1 to 4, in, The plurality of turns of the wound coil include outermost turns adjacent to the first and second surfaces of the body, respectively, and an innermost turn adjacent to a central portion of the body in a thickness direction of the body, and The noise removal portion further includes a first noise removal pattern, and the first noise removal pattern and the second noise removal pattern are respectively arranged on the outermost turn of the winding coil and both form an open loop.

10. The coil assembly according to claim 9, wherein A size of a region where the noise removal portion overlaps the outermost turn of the wound coil is larger than a size of a region of the outermost turn of the wound coil that does not overlap the noise removal portion. The coil assembly according to claim 10 , wherein: A ratio of a size of a region of the outermost turn of the wound coil that does not overlap the noise removing portion to a size of a region of the noise removing portion that overlaps the outermost turn of the wound coil is 20% or less.

12. The coil assembly according to claim 9, wherein The insulating layer includes an insulating film provided along a surface of each of the plurality of turns of the wound coil and provided between the outermost turn of the wound coil and the noise removing portion.

13. The coil assembly according to claim 12, further comprising: An additional insulating layer is provided between the insulating film on the outermost turn of the wound coil and the noise removing portion.

14. The coil assembly according to claim 9, in, The first noise removing pattern includes a fourth lead-out portion connected to the pattern portion of the first noise removing pattern and spaced apart from the third lead-out portion.

15. The coil assembly according to claim 14, further comprising: a fourth external electrode disposed on the second side surface of the body, the fourth external electrode being spaced apart from the first external electrode and the second external electrode, The fourth lead portion is exposed to the first side surface of the body and connected to the third external electrode.

16. The coil assembly according to claim 15, wherein The third external electrode and the fourth external electrode contact each other on the second surface of the body and are connected to each other.

17. The coil assembly according to claim 14, further comprising: a fourth external electrode disposed on the second side surface of the body and spaced apart from the first external electrode and the second external electrode, wherein the fourth lead-out portion of the first noise removing pattern is exposed to the second side surface of the body and connected to the fourth external electrode.

18. The coil assembly according to claim 17, wherein The third external electrode and the fourth external electrode contact each other on the second surface of the body and are connected to each other.

19. A coil assembly comprising: a main body having a first surface and a second surface opposite to each other, a first end surface and a second end surface connecting the first surface to the second surface and opposite to each other, and a first side surface and a second side surface connecting the first end surface to the second end surface and opposite to each other; a winding coil disposed in the main body and having a plurality of turns and a first lead-out portion and a second lead-out portion, the first lead-out portion and the second lead-out portion being exposed to the first end surface and the second end surface of the main body, respectively; as well as The first noise removal portion and the second noise removal portion are respectively provided on the opposite outermost turns of the winding coil and are spaced apart from the winding coil. The first noise removal portion and the second noise removal portion each include a pattern portion, wherein a first end portion and a second end portion of the pattern portion are spaced apart from each other to form an open loop. The first noise removal portion and the second noise removal portion respectively include a fourth lead-out portion connected to the corresponding pattern portion and exposed to the second side surface of the body, and a third lead-out portion connected to the corresponding pattern portion and exposed to the first side surface of the body, and The first noise removing portion is spaced apart from the first side surface of the body, and the second noise removing portion is spaced apart from the second side surface of the body.

20. The coil assembly according to claim 19, wherein The line width of each turn of the winding coil is greater than the thickness of each turn, or the winding coil is a flat vertical winding coil.

21. The coil assembly according to claim 19, further comprising: a first external electrode, a second external electrode, a third external electrode, and a fourth external electrode, respectively disposed on the first end surface, the second end surface, the first side surface, and the second side surface of the body and spaced apart from each other; The first lead portion and the second lead portion of the wound coil are connected to the first external electrode and the second external electrode, respectively.

22. The coil assembly according to claim 21, wherein The fourth lead-out portion of the first noise removal portion and the third lead-out portion of the second noise removal portion are connected to the third external electrode and the fourth external electrode, respectively.

23. The coil assembly according to claim 21, wherein Both the fourth lead-out portion of the first noise removing portion and the third lead-out portion of the second noise removing portion are connected to the third external electrode.

24. The coil assembly according to any one of claims 19 to 23, further comprising: Insulation layers are provided between the opposing outermost turns of the wound coil and the first and second noise removal portions, respectively.

25. The coil assembly according to any one of claims 19 to 23, wherein: A line width of each of the first noise removal portion and the second noise removal portion is greater than a thickness of a corresponding one of the first noise removal portion and the second noise removal portion.

26. The coil assembly according to any one of claims 19 to 23, wherein: A gap is defined between the first end and the second end of the pattern portion of the first noise removal portion, and a gap is defined between the first end and the second end of the pattern portion of the second noise removal portion.

27. A coil assembly comprising: a main body having a first surface and a second surface opposite to each other, a first end surface and a second end surface connecting the first surface to the second surface and opposite to each other, and a first side surface and a second side surface connecting the first end surface to the second end surface and opposite to each other; a winding coil disposed in the main body and having a plurality of turns and a first lead-out portion and a second lead-out portion, the first lead-out portion and the second lead-out portion being exposed to the first end surface and the second end surface of the main body, respectively; a noise removal portion provided in the body and spaced apart from the wound coil, and comprising a pattern portion and a third lead-out portion, the pattern portion having a first end portion and a second end portion spaced apart from each other and forming an open loop, the third lead-out portion being connected to the pattern portion and exposed to the first side surface of the body; an insulating layer provided between the winding coil and the noise removal portion; as well as a first external electrode, a second external electrode, and a third external electrode, respectively disposed on the first end surface, the second end surface, and the first side surface of the body, spaced apart from each other, and respectively connected to the first lead portion, the second lead portion, and the third lead portion; wherein the line width of one of the multiple turns of the winding coil is greater than the thickness of the one turn, and A line width of the pattern portion of the noise removal portion is smaller than a line width of the wound coil.

28. A coil assembly comprising: a main body having a first surface and a second surface opposite to each other, a first end surface and a second end surface connecting the first surface to the second surface and opposite to each other, and a first side surface and a second side surface connecting the first end surface to the second end surface and opposite to each other; a winding coil disposed in the main body and having a plurality of turns and a first lead-out portion and a second lead-out portion, the first lead-out portion and the second lead-out portion being exposed to the first end surface and the second end surface of the main body, respectively; as well as The first noise removal portion and the second noise removal portion are respectively provided on the opposite outermost turns of the winding coil and are spaced apart from the winding coil. The first noise removal portion and the second noise removal portion each include a pattern portion, wherein a first end portion and a second end portion of the pattern portion are spaced apart from each other to form an open loop. The first noise removal portion and the second noise removal portion respectively include a fourth lead-out portion and a third lead-out portion connected to corresponding pattern portions and exposed to a surface of the body, and A line width of a pattern portion of at least one of the first noise removal portion and the second noise removal portion is smaller than a line width of the wound coil.

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