Patent Publication Number: US-2020286672-A1

Title: Coil electronic component

Description:
CROSS-REFERENCE TO RELATED APPLICATION(S) 
     This application claims benefit of priority to Korean Patent Application No. 10-2019-0025755 filed on Mar. 6, 2019 in 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 electronic component. 
     BACKGROUND 
     Recently, as information technology (IT) devices such as communications devices, display devices, and the like, have been increasingly miniaturized and thinned, research into technologies facilitating the miniaturizing and thinning of various elements such as inductors, capacitors, transistors, and the like, used in such IT devices, has been continuously undertaken. In this regard, inductors have been rapidly replaced by chips having a small size and high density, capable of being automatically surface-mounted. In addition, a thin-film type device, manufactured by forming a coil pattern on top and bottom surfaces of an insulating substrate by a plating process and laminating, pressing, and curing a magnetic sheet, in which magnetic powder particles and a resin are mixed, on an upper portion and a lower portion of the coil pattern, has been developed. 
     However, as a chip size of the thin-film type inductor has also been decreased, the volume of a body has been reduced. Accordingly, a space for forming a coil in the body is also reduced, and the number of turns of the formed coil is decreased. 
     As described above, when an area, in which a coil is formed, is reduced, it may be difficult to secure high capacitance and a width of the coil may be decreased. Thus, DC resistance and AC resistance may be increased and a quality factor Q may be lowered. 
     In order to achieve high capacitance and a high quality factor Q even if a chip size is decreased, a coil needs to be formed to occupy as large an area as possible in a miniaturized body. In addition, inductor performance such as inductance L, a quality factor Q, and the like, needs to be improved by increasing an area of an internal coil and allowing magnetic flux to flow smoothly. 
     SUMMARY 
     An aspect of the present disclosure is to provide a coil electronic component which may achieve high capacitance in spite of a decrease in chip size by increasing an area in which a coil portion is formed within the same chip size. 
     An aspect of the present disclosure is to provide a coil electronic component which may improve performance such as inductance L, a quality factor Q, and the like, by significantly reducing an influence of a mounting substrate and an external electrode interfering with a flow of magnetic flux. 
     An aspect of the present disclosure is to provide a coil electronic component which may achieve an improvement in performance by increasing an area of a core portion in a coil portion, a degree of freedom in design of a margin portion between an outermost portion of the coil portion and an exterior of a body, and the like, which is limited as a chip size is decreased. 
     According to an aspect of the present disclosure, a coil electronic includes a body having a first surface and a second surface opposing each other, and a third and a fourth surface opposing each other and connecting the first surface and the second surface to each other, an insulating substrate disposed inside the body, first and second coil portions respectively disposed on opposing surfaces of the insulating substrate, a first lead-out portion connected to one end of the first coil portion and exposed from the first surface and the third surface of the body, a second lead-out portion connected to one end of the second coil portion and exposed from the second surface and the third surface of the body, and first and second external electrodes respectively covering the first and second lead-out portions. The insulating substrate includes a support portion supporting the first and second coil portions, a first tip exposed from the first and third surfaces of the body and supporting the first lead-out portion, and a second tip exposed from the second and third surfaces of the body and supporting the second lead-out portion. 
     According to an aspect of the present disclosure, a coil electronic includes a body having a first surface and a second surface opposing each other, and a third and a fourth surface opposing each other and connecting the first surface and the second surface to each other; an insulating substrate disposed inside the body; first and second coil portions respectively disposed on opposing surfaces of the insulating substrate; a first lead-out portion disposed on the insulating substrate, connected to one end of the first coil portion, and exposed from the first surface and the third surface of the body; a second lead-out portion disposed on the insulating substrate, connected to one end of the second coil portion, and exposed from the second surface and the third surface of the body; and first and second external electrodes respectively covering the first and second lead-out portions. Each of the first and second external electrodes includes a first conductive layer disposed on a respective one of the first and second lead-out portions, and a second conducive layer covering the first conducive layer. The first conductive layer has a concave portion on a portion of the insulating substrate exposed from the body. 
     According to an aspect of the present disclosure, a coil electronic includes a body having a first surface and a second surface opposing each other, and a third and a fourth surface opposing each other and connecting the first surface and the second surface to each other; an insulating substrate disposed inside the body; first and second coil portions respectively disposed on opposing surfaces of the insulating substrate; a first lead-out portion disposed on the insulating substrate, connected to one end of the first coil portion, and exposed from the first surface and the third surface of the body; a second lead-out portion disposed on the insulating substrate, connected to one end of the second coil portion, and exposed from the second surface and the third surface of the body; first and second external electrodes respectively covering the first and second lead-out portions; and an oxide covering portions of the body. 
     The body may be 1608-sized or less. 
     The coil portion may be formed to be parallel to the first surface and the second surface of the body. 
     The coil portion may be formed to stand upright with respect to the third surface or the fourth surface of the body at an angle of 80 to 100 degrees. 
     The first and second external electrodes, respectively covering the first and second lead-out portions, maybe formed to extend to the first surface, the second surface, and the third surface of the body, but may not be formed on the fourth surface 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 schematic perspective view illustrating a coil portion of a coil electronic component according to an embodiment in the present disclosure; 
         FIG. 2  is a cross-sectional view taken along line I-I′ of the coil electronic component illustrated in  FIG. 1 ; 
         FIG. 3  is a cross-sectional view taken along line II-II′ of the coil electronic component according to an example embodiment in the present disclosure illustrated in  FIG. 2 ; and 
         FIG. 4  is a cross-sectional view taken along line II-II′ of the coil electronic component according to another example embodiment in the present disclosure illustrated in  FIG. 2 . 
     
    
    
     DETAILED DESCRIPTION 
     The terminology used herein to describe embodiments of the present disclosure is 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. 
     In a description of the embodiment, in a case in which any one element is described as being formed on (or under) another element, such a description includes both a case in which the two elements are formed to be in direct contact with each other and a case in which the two elements are in indirect contact with each other such that one or more other elements are interposed between the two elements. In addition, when in a case in which one element is described as being formed on (or under) another element, such a description may include a case in which the one element is formed at an upper side or a lower side with respect to the another element. 
     Also, the sizes of components in the drawings may be exaggerated for convenience of description. In other words, since the sizes and thicknesses of components in the drawings are arbitrarily illustrated for convenience of description, the following embodiments are not limited thereto. 
     In the drawing, an X direction will be defined as a first direction or a length direction, a Y direction will be defined as a second direction or width direction, and a Z direction will be defined as a third direction or thickness direction. 
     Hereinafter, the exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The same or corresponding elements will be consistently denoted by the same respective reference numerals and described in detail no more than once regardless of drawing symbols. 
     Various types of electronic components are used in an electronic device. Various types of coil components may be appropriately used between such electronic components for the purpose of noise removal or the like. 
     In an electronic device, a coil component may be used as, for example, a power inductor, a high-frequency (HF) inductor, a general bead, a bead for high frequency (GHz Bead), a common mode filter, and the like. 
     Hereinafter, the present disclosure will be described under the assumption that a coil electronic component  10  according to example embodiments is a thin-film inductor used in a power line of a power supply circuit. However, a coil electronic component according to example embodiments may be appropriately applied to a chip bead, a chip filter, or the like in addition to the thin-film inductor. 
     Embodiment 1 
       FIG. 1  is a schematic perspective view illustrating a coil portion of a coil electronic component according to an embodiment in the present disclosure.  FIG. 2  is a cross-sectional view taken along line I-I′ of the coil electronic component illustrated in  FIG. 1 .  FIG. 3  is a cross-sectional view taken along line II-II′ of the coil electronic component according to an example embodiment in the present disclosure illustrated in  FIG. 2 . 
     Referring to  FIGS. 1 to 3 , a coil electronic component  10  according to an example embodiment includes a body  50 , an insulating substrate  23 , coil portions  42  and  44 , lead-out portions  62  and  64 , and external electrodes  851  and  852 , and may further include dummy lead-out portions  63  and  65  and an insulating layer  72 . 
     The body  50  may form an exterior of the electronic component  10 , and the insulating substrate  23  is disposed in the body  50 . 
     The body  50  may be formed to have an approximately hexahedral shape. 
     The body  50  has a first surface  101  and a second surface, opposing each other in an X direction, a third surface  103  and a fourth surface  104 , opposing each other in a Z direction, and a fifth surface  105  and a sixth surface  106  opposing each other in a Y direction. Each of the third and fourth surfaces  103  and  104 , opposing each other, may connect the first and second surfaces  101  and  102  to each other. 
     As an example, the body  50  may be formed such that the coil electronic component  10 , on which the external electrodes  851  and  852  to be described later are disposed, has a length of 0.2±0.1 mm, a width of 0.25±0.1 mm, and a maximum thickness of 0.4 mm, but the length, the width, and the thickness thereof are not limited thereto. 
     The body  50  may include a magnetic material and an insulating resin. Specifically, the body  50  may be formed by laminating an insulating resin and at least one magnetic sheet including a magnetic material dispersed in the insulating resin. However, the body  50  may have another structure, other than the structure in which the magnetic materials are disposed in the insulating resin. For example, the body  50  may include a magnetic material such as ferrite. 
     The magnetic material may be ferrite or metal magnetic powder particles. 
     The ferrite powder particles may be at least one of, for example, spinel type ferrites such as ferrites that are Mg—Zn-based, Mn—Zn-based, Mn—Mg-based, Cu—Zn-based, Mg—Mn—Sr-based, Ni—Zn-based, hexagonal ferrites such as ferrites that are Ba—Zn-based, Ba—Mg-based, Ba—Ni-based, Ba—Co-based, Ba—Ni—Co-based, or the like, garnet ferrites such as Y-based ferrite, and Li-based ferrite. 
     The metal magnetic powder particles may include at least one selected from a 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 metal magnetic powder particles may include at least one of pore ion power particles, Fe-Si-based alloy powder particles, Fe—Si—Al-based alloy powder particles, Fe—Ni-based alloy powder particles, Fe—Ni—Mo-based alloy powder particles, Fe—Ni—Mo—Cu-based alloy powder particles, Fe—Co-based alloy powder particles, Fe—Ni—Co-based alloy powder particles, Fe—Cr-based alloy powder particles, Fe—Cr—Si-based alloy powder particles, Fe—Si—Cu—Nb-based alloy powder particles, Fe—Ni—Cr-based alloy powder particles, and Fe—Cr—Al-based alloy powder particles. 
     The metal magnetic powder particles may be amorphous or crystalline. For example, the metal magnetic powder particles may Fe—Si—B—Cr based amorphous alloy powder particles, but are not limited thereto. 
     Each of the ferrite and metal magnetic powder particles may have an average diameter of about 0.1 μm to about 30 μm, but the average diameter is not limited thereto. 
     The body  50  may include two or more types of magnetic materials dispersed in a resin. The expression “different types of magnetic materials” refers to the fact that magnetic materials, dispersed in a resin, are distinguished from each other by any one of average diameter, composition, crystallinity, and shape. 
     The insulating resin may include epoxy, polyimide, liquid crystal polymer, and the like, alone or in combination, but is not limited thereto. 
     The insulating substrate  23  may be disposed inside the body  50  and may have both surfaces on which the first and second coil portions  42  and  44  are disposed, respectively. The insulating substrate  23  may include a support portion  24 , supporting the coil portions  42  and  44 , and tips  231  and  232  supporting the lead-out portions  62  and  64 . The support portion  24  and the tips  231  and  232  will be described later. 
     The insulating substrate  23  may have a thickness of 10 micrometers (μm) or more to 60 μm or less. When the thickness of the insulating substrate  23  maybe less than 10 μm, electrical short-circuit may occur between the coil portions  42  and  44 . When the thickness of the insulating substrate  23  is greater than 60 μm, a thickness of the coil electronic component  10  may be increased to cause a disadvantage to thinning. Ls(pH) increased by 7.2% and Isat(A) increased by 8.9% when the insulating substrate  23  had a thickness of 30 μm, as compared with when the insulating substrate  23  had a thickness of 60 μm. Ls (μH) increased by 2.5% and Isat (A) increased by 2.2% when the insulating substrate  23  had a thickness of 20 μm, as compared with when the insulating substrate  23  had a thickness of 30 μm. 
     The insulating substrate  23  may be formed of an insulating material including a thermosetting resin such as an epoxy resin, a thermoplastic resin such as a polyimide resin, or an insulating a photosensitive insulating resin, or an insulating material in which such an insulating resin is impregnated with a reinforcing material such as glass fiber and inorganic filler. For example, the insulating substrate  23  may be formed of an insulating material such as prepreg, Ajinomoto Build-up Film (ABF), FR-4, a Bismaleimide Triazine (BT) film, a photoimageable dielectric (PID) film, or the like, but an insulating material of the insulating substrate  23  is not limited thereto. 
     The inorganic filler may be at least one selected from the group consisting of silica (SiO 2 ) , alumina (A 1   2 O 3 ) , silicon carbide (SiC), barium sulfate (BaSO 4 ), talc, clay, mica powder particles, aluminum hydroxide (AlOH 3 ), magnesium hydroxide (Mg(OH) 2 ), a calcium carbonate (CaCO 3 ), magnesium carbonate (MgCO 3 ), magnesium oxide (MgO), boron nitride (BN), aluminum borate (AlBO 3 ) , barium titanate (BaTiO 3 ) , and calcium zirconate (CaZrO 3 ). 
     The insulating substrate  23  may provide better rigidity when it is formed of an insulating material which includes a reinforcing material. The insulating substrate  23  may be advantageous in reducing an entire thickness of the coil portions  42  and  44  when it is formed of an insulating material which does not include a glass fiber. When the insulating substrate  23  is formed of an insulating material including a photosensitive insulating resin, the number of processes of forming the coil portions  42  and  44  may be decreased to be advantageous in reducing manufacturing costs and to forma fine via. 
     The support portion  24  may be one region disposed between the first and second coil portions  42  and  44  of the insulating layer  23  to support the coil portions  42  and  44 . 
     The tips  231  and  232  may extend from the support portion  24  of the insulating substrate  23  to support the lead-out portions  62  and  64  and the dummy lead-out portions  63  and  65 . 
     Specifically, a first tip  231  may be disposed between a first lead-out portion  62  and a first dummy lead-out portion  63  to support the first lead-out portion  62  and the first dummy lead-out portion  63 . A second tip  232  may be disposed between a second lead-out portion  64  and a second dummy lead-out portion  65  to support the second lead-out portion  64  and the second dummy lead-out portion  65 . 
     The tips  231  and  232  refers to regions extending from the lead-out portions  62  and  64 , disposed on the first surface  101  and the second surface  102  of the body  50 , to regions corresponding to the lead-out portions  62  and  64 , disposed on the third surface  103  of the body  50 , respectively. 
     The coil portions  42  and  44  may be respectively disposed on both surfaces of the insulating substrate  23 , and may exhibit characteristics of a coil electronic component. For example, when the coil electronic component  10  according to an example embodiment is used as a power inductor, the coil portions  42  and  44  may store an electric field as a magnetic field and maintain an output voltage to stabilize power of an electronic device. 
     According to an example embodiment, the first and second coil portions  42  and  44  may be formed to stand upright with respect to the third surface  103  or the fourth surface of the body  50 . 
     As illustrated in  FIG. 1 , the expression “formed to stand upright with respect to the third surface  103  or the fourth surface  104  of the body  50 ” refers to the fact that contact surfaces between the coil portions  42  and  44  and the insulating substrate  23  are formed to be perpendicular or substantially perpendicular to the third surface  103  or the fourth surface  104  of the body  50 . For example, the contact surfaces between the coil portions  42  and  44  and the insulating substrate  23  may be formed to stand upright with respect to the third surface  103  or the fourth surface  104  of the body  50  at an angle of 80 to 100 degrees. 
     As the body  50  is miniaturized to be 1608-sized, 1006-sized or less, a body  50  having a thickness greater than a width is formed and a cross-sectional area of the body  50  in an XZ direction is larger than a cross-sectional area of the body  50  in an XY direction. Therefore, the coil portions  42  and  44  maybe formed to stand upright with respect to the third surface  103  or the fourth surface  104  of the body  50  to increase an area in which the coil portions  42  and  44  may be formed. 
     For example, when the body  50  has a length of 1.6±0.2 mm and a width is 0.8±0.05 mm, a thickness of the body  50  may satisfy a range of 1.0±0.05 mm (1608 size). When the body  50  has a length of 0.2±0.1 mm and a width of 0.25±0.1 mm, a thickness of the body  50  may satisfy a maximum range of 0.4 mm (1006 size). Since the thickness of the body  50  is greater than the width of the body  50 , a larger area maybe secured when the coil potions  42  and  44  is vertical to the third surface  103  or the fourth surface  104  of the body  50  than when the coil potions  42  and  44  is horizontal to the third surface  103  or the fourth surface  104  of the body  50 . The larger the area in which the coil portions  42  and  44  are formed, the higher inductance L and quality factor Q. 
     Each of the first and second coil portions  42  and  44  may have a flat spiral shape forming at least one turn about a core portion  71 . As an example, the first coil portion  42  may form at least one turn about the core portion on one surface of the insulating substrate  23 . 
     The coil portions  42  and  44  may include a coil pattern having a flat spiral shape. In the insulating substrate  23 , the coil portions  42  and  44 , disposed on both surfaces opposing each other, maybe electrically connected to each other through a via electrode  46  formed in the insulating substrate  23 . 
     The coil portions  42  and  44  and the via electrode  46  may include a metal having improved electrical conductivity. For example, the coil portions  42  and  44  and the via electrode  46  maybe formed of silver (Ag) , palladium (Pd) , aluminum (Al), nickel (Ni), titanium (Ti), gold (Au), copper (Cu), platinum (Pt), or alloys thereof. 
     The lead-out portions  62  and  64  may be exposed from the first surface  101  and a second surface  102  of the body  50 , respectively. Specifically, the first lead-out portion  62  and the first dummy lead-out portion  63  maybe exposed from the first surface  101  of the body  50 , and the second lead-out portion  64  and the second dummy lead-out portion  65  may be exposed from the second surface  102  of the body  50 . 
     Referring to  FIGS. 1 and 2 , one end of the first coil portion  42 , disposed on one surface of the insulating substrate  23 , may extend to form the first lead-out portion  62 , and the first lead-out portion  62  may be exposed from the first surface  101  and the third surface  103  of the body  50 . For example, the first lead-out portion  62  of the present disclosure may have a width narrower than a width of the body  50 . In addition, one end of the second coil portion  44 , disposed on an opposing surface of the insulating substrate  23 , may extend to form the second lead-out portion  64 , and the second lead-out portion  64  maybe exposed from the second surface  102  and the third surface  103  of the body  50 . For example, the lead-out portion  64  of the present disclosure may have a width narrower than the width of the body  50 . The first and second lead-out portions  62  and  64  extend from the first surface  101  and the second surface  102  to be led out to the third surface  103 , and may not be disposed on the fourth surface  104 , the fifth surface  105 , and the sixth surface  106  of the body  50 . 
     Referring to  FIGS. 1 to 3 , the first and second external electrodes  851  and  852  and the coil portions  42  and  44  are connected respectively through the lead-out portions  62  and  64 , disposed inside the body  50 , rather than directly connected through lead-out portions disposed outside a body. After a process of plating the coil portions  42  and  44 , a process of trimming the insulating substrate  23  may be performed to form a structure in which the lead-out portions  62  and  64  is disposed inside the body  50 . The structure, formed by the trimming process, may include a support portion  24  supporting the coil portions  42  and  44 , a first tip  231  exposed from the first and third surfaces  101  and  103  of the body  50  and supporting the lead-out portion  62 , and a second tip  232  exposed from the second and third surfaces  102  and  103  of the body  50  and supporting the second lead-out portion  62 . 
     Since the first and second lead-out portions  62  and  64  may include a conductive metal such as copper (Cu) and the first and second lead-out portions  62  and  64  may be disposed inside the body  50 , occurrence of a dimple, caused by a decrease in thickness of a plating layer, may be reduced as compared to a related art in which a plating layer is formed on a trimmed insulating substrate and external portions are disposed outside a body. 
     The dummy lead-out portions  63  and  65  may be disposed on one surface and the other surface of the insulating substrate  23  to correspond to the lead-out portions  62  and  64 . According to an example embodiment, the coil electronic component  10  may further include a first dummy lead-out portion  63 , disposed on a surface opposing the first lead-out portion  62  on the insulating substrate  23 , and a second dummy lead-out portion  65  disposed on a surface opposing the second lead-out portion  64 . 
     At least one of the coil portions  42  and  44 , the via electrode  46 , the lead-out portions  62  and  64 , and the dummy lead-out portions  63  and  65  may include at least one conductive layer. 
     For example, when the coil portions  42  and  44 , the dummy lead-out portions  63  and  65 , and the via electrode  46  are formed on one surface or the other surface of the insulating substrate  23  by plating, each of the coil portions  42  and  44 , the dummy lead-out portions  63  and  65 , and the via electrode  46  may include a seed layer such as an electroless plating layer, or the like, and an electroplating layer. The electroplating layer may have a single-layer structure or a multilayer structure. An electroplating layer of a multilayer structure may have a conformal film structure in which one electroplating layer is covered with another electroplating layer, or may have a structure in which another electroplating layer is laminated on only one surface of one electroplating layer. A seed layer of the electroplating layer of the coil portions  42  and  44 , a seed layer of the lead-out patterns  62  and  64 , and a seed layer of the via electrode  46  maybe formed integrally with each other, such that boundaries therebetween may not be formed, but is not limited thereto. An electroplating layer of the coil portions  42  and  44 , an electroplating layer of the dummy lead-out patterns  63  and  65 , and an electroplating layer of the via electrode  46  may be formed integrally with each other, such that boundaries therebetween may not be formed, but is not limited thereto. 
     Each of the coil portions  42  and  44 , the lead-out portions  62  and  64 , the dummy lead-out portions  63  and  65 , and the via electrode  46  may be formed of a conductive material such as copper (Cu), aluminum (Al), silver (Ag) (Sn), gold (Au), nickel (Ni), lead (Pb), titanium (Ti), or alloys thereof. 
     Referring to  FIG. 3 , the dummy lead-out portions  63  and  65  may be laminated adjacent to a magnetic sheets, in which the coil portions  42  and  44 , the first lead-out portion  62 , and the second lead-out portion  64  are disposed, to cause a greater number of metallic bondings to the first and second external electrodes  851  and  852  disposed on the first surface  101 , the second surface  102 , and the third surface  103  of the body  50  and to improve bonding force between the coil portions  42  and  44  and the external electrodes  851  and  852  and between an electronic component and a printed circuit board (PCB). 
     The first dummy lead-out portion  63  and the first lead-out portion  62  are disposed to correspond to each other with the insulating substrate  23  interposed therebetween, such that a concave portion A is formed on a surface of a first layer  85   a  including a metal, as will be described later. For example, since the first layer  85   a  covers more of the first lead-out portion  62  and the first dummy lead-out portion  63  than the insulating substrate  23  including the insulating material, a concave portion A is relatively disposed in a region covering the insulating substrate  23 . Similarly, the second dummy lead-out portion  65  and the second lead-out portion  64  are disposed to correspond to each other with the insulating substrate  23  interposed therebetween, such that a concave portion is also formed on a surface of a first layer, adjacent to the second surface  102 , including a metal. Similarly, since such a first layer covers more of the second lead-out portion  65  and the second dummy lead-out portion  64  than the insulating substrate  23  including the insulating material, a concave portion is also relatively disposed in a region covering the insulating substrate  23  adjacent to the second surface  102 . 
     The first external electrode  851  may be disposed on the first surface  101  and the third surface  103  of the body  50 , and the second external electrode  852  may be disposed on the second surface  102  and the third surface  103  of the body  50 . 
     According to an example embodiment, the first external electrode  851  may be disposed on the first surface  101  and the third surface  103  of the body  50  to be connected to the first lead-out portion  62  exposed from the first surface  101  and the third surface  103  of the body  50 , and the second external electrode  852  may be disposed on the second surface  102  and the third surface  103  of the body  50  to be connected to the second lead-out portion  64  exposed from the second surface  102  and the third surface  103  of the body  50 . The external electrodes  851  and  852  may be have a width narrower than a width of the body  50 . The first external electrode  851  may be a structure, covering the first lead-out portion  62  and extending from the first surface  101  of the body  50  to be disposed on the third surface  103 , but is not disposed on the fourth surface  104 , the fifth surface  105 , and the sixth surface  106  of the body  50 . The second external electrode  852  may be a structure, covering the second lead-out portion  64  and extending from the second surface  102  of the body  50  to be disposed on the third surface  103 , but is not disposed on the fourth surface  104 , the fifth surface  105 , and the sixth surface  106  of the body  50 . 
     Since the external electrodes  851  and  852  are disposed on portions of the first surface  101 , the second surface  102 , and the third surface  103  of the body  50  and have the width narrower than the width of the body  50 , an influence of the external electrodes  851  and  852 , interfering with a flow of magnetic flux, maybe reduced to improve inductance performance such as inductance L, a quality factor Q, and the like. 
     The external electrodes  851  and  852  may have a single-layer structure or a multilayer structure. According to an example embodiment, the external electrodes  851  and  852  may each include a first layer  85   a , respectively covering the lead-out portions  62  and  64 , and a second layer  85   b  covering the first layer  85   a . Specifically, a coil electronic component including the first layer  85   a , including nickel (Ni), and the second layer  85   b , including tin (Sn), is provided. 
     The concave portion A may be disposed on a surface of the first layer  85   a . The concave portion A may be disposed in a region covering the insulating substrate  23  on the first layer  85   a . Since electrical connectivity of the insulating substrate  23  is different from electrical connectivity of the lead-out portions  62  and  64 , the first layer  85   a , formed of a metal, is mainly plated on surfaces of the lead-out portions  62  and  64  and the dummy lead-out portions  63  and  65  . Accordingly, the first layer  85   a , disposed on the first lead-out portion  62  and the first dummy lead-out portion  63 , may have the concave portion A formed in a region corresponding to the first tip  231  of the insulating substrate  23 , as illustrated in  FIG. 3 . Although not illustrated in the drawings, the first layer  85   a , disposed on the second lead-out portion  64  and the first dummy lead-out portion  65 , may also have a concave portion A disposed in a region corresponding to the second tip  232  of the insulating substrate  23 . 
     The insulating layer  72  may be disposed on a surface of the body  50 . Before the external electrodes  851  and  852  are formed by electroplating, the insulating layer  72  may be selectively formed on the surface of the body  50  to prevent plating from being performed on a region of the surface of the body  50 , except for regions in which the external electrodes  851  and  852  are formed. Additionally, after the plating process, electrical short-circuit between a coil electronic component and another electronic component may be prevented. 
     According to an example embodiment, the insulating layer  72  is formed by acidizing metallic magnetic powder particles (for example, Fe-based magnetic powder particles) exposed from the surface of the body  50 , which is different from an insulating layer according to a related art. For example, an etchant, selectively reacting with iron (Fe), may be used to selectively form an insulating layer, an Fe oxide layer, in a region of the surface of the body  50 , except for regions in which the lead-out portions  62  and  64  and the dummy lead-out portions  63  and  65  are exposed. In this case, the insulating layer  72  is an oxide of a composition, for example, Fe-based magnetic material, composing metal magnetic powder particles disposed inside the body  50 . 
     For example, the insulating layer  72  may include an oxide layer including a compound selected from the group consisting of Fe, Nb, Si, Cr, or alloys thereof. As described above, since the insulating layer  72  is formed by the acidizing, it may be formed on the surface of the body  50  to have a significantly small thickness. For example, a thickness of the insulating layer  72  may be less than that of the first layer  85   a . Thus, thinning may be implemented as compare to a coil electronic component according to a related art. 
     Embodiment 2 
       FIG. 4  is a cross-sectional view taken along line II-II′ of the coil electronic component according to another example embodiment in the present disclosure illustrated in  FIG. 2 . 
     A coil electronic component  100  according to this embodiment is different, in a shape of a first layer  85   a , from the coil electronic component  10  according to the first embodiment. Therefore, this embodiment will be described with a focus on the first layer  85   a , which is different from that of the first embodiment. Descriptions of the other components of the second embodiment are the same as the descriptions of those of the first embodiment. 
     Referring to  FIG. 4 , external electrodes  851  and  852  may include a first layer  85   a , covering the lead-out portions  62  and  64 , and a second layer  85   b  covering the first layer  85   a . By adjusting parameters such as concentration of a plating solution, intensity of plating current, a plating rate, and the like, a first layer  85 , which may be formed as a nickel plating layer, may have a spacing portion disposed around regions corresponding to tips  231  and  232  of an insulating substrate  23 . In this case, the tips  231  and  232  of the insulating substrate  23  may be exposed from the first layer  85 . Thus, a second layer  85   b , formed after the first layer  85   a , may be in contact with an exposed region of the insulating substrate  23 . 
     As described above, according to the present disclosure, even if a chip size is decreased, the quality of a coil electronic component may be improved by increasing an area in which a coil portion is formed within the same chip size. 
     In addition, performance such as inductance L, a quality factor Q, and the like, may be improved by significantly reducing an influence of a mounting substrate and an external electrode interfering with a flow of magnetic fix. 
     Furthermore, high performance may be implemented by increasing an area of a core portion in a coil portion, a degree of freedom in design of a margin portion between an outermost portion of the coil portion and an exterior of a body, and the like, which is limited as a chip size is decreased. 
     While example embodiments have been shown and described above, it will be apparent to those skilled in the art that modifications and variations could be made without departing from the scope of the present disclosure as defined by the appended claims.