Patent Publication Number: US-11664154-B2

Title: Coil component

Description:
CROSS-REFERENCE TO RELATED APPLICATION(S) 
     This application claims the benefit under 35 USC 119 (a) of Korean Patent Application No. 10-2019-0101780 filed on Aug. 20, 2019 in the Korean Intellectual Property Office, the entire disclosure of which is incorporated herein by reference for all purposes. 
     TECHNICAL FIELD 
     The present disclosure relates to a coil component. 
     BACKGROUND 
     An inductor, a coil component, is a representative passive element used in an electronic device together with a resistor and a capacitor. 
     A thin film type power inductor is manufactured by forming a coil portion using a plating process, curing a magnetic powder-resin composite, in which magnetic powder particles and a resin are mixed, to form a body, and forming external electrodes on external surface of the body. 
     However, in the case in which the body is formed using magnetic metal powder particles having high conductivity, plating bleeding may occur on a surface of the body when external electrodes are formed on external surfaces of the body by plating. 
     Accordingly, there is a need for an effective method of maintaining component characteristics while preventing plating bleeding by forming an insulating layer on a surface of a body. 
     SUMMARY 
     An aspect of the present disclosure is to provide a coil component in which plating bleeding may be prevented to improve reliability thereof. 
     Another aspect of the present disclosure is to provide a coil component in which a decrease in a surface area of a magnetic material of a body may be efficiently prevented. 
     According to an aspect of the present disclosure, a coil component includes a support substrate and a coil portion disposed on the support substrate, a body, in which the support substrate and the coil portion are embedded, having one surface and the other surface opposing each other, one side surface and the other side surface connecting the one surface and the other surface to each other and opposing each other, and one end surface and the other end surface, opposing each other, each connecting the one side surface and the other side surface to each other, a first lead-out portion and a second lead-out portion, respectively extending from the coil portion to be exposed to the one side surface and the other side surface of the body, an insulating layer disposed on each of the one surface and the other surface of the body, and an oxide insulating layer disposed on each of the one side surface and the other side surface of the body and each of the one end surface and the other end surface of the body. The insulating layer is provided with a plurality of slits spaced apart from each other to expose portions of the one surface and the other surface of the body 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: 
         FIGS.  1  and  2    are schematic diagrams of a coil component according to a first embodiment in the present disclosure; 
         FIG.  3    is a cross-sectional view taken along line I-I′ in  FIG.  2   ; 
         FIG.  4    is a cross-sectional view taken along line II-II′ in  FIG.  2   ; 
         FIG.  5    is an enlarged view of portion ‘A’ in  FIG.  4   ; 
         FIG.  6    is an enlarged view of portion ‘B’ in  FIG.  4   ; 
         FIGS.  7  and  8    are schematic diagrams, each illustrating a coil component according to a modified version of the first embodiment in the present disclosure; 
         FIG.  9    is a cross-sectional view taken along line III-III′ in  FIG.  8   ; 
         FIGS.  10  and  11    are schematic diagrams, each illustrating a coil component according to a second embodiment in the present disclosure; 
         FIG.  12    is a cross-sectional view, taken along line IV-IV′ in  FIG.  11   , of the coil component illustrated in  FIG.  11   ; 
         FIGS.  13  and  14    are schematic diagrams, each illustrating a coil component according to a modified version of the second embodiment in the present disclosure; and 
         FIG.  15    is a cross-sectional view taken along line V-V′ in  FIG.  14   . 
     
    
    
     DETAILED DESCRIPTION 
     The following detailed description is provided to assist the reader in gaining a comprehensive understanding of the methods, apparatuses, and/or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatuses, and/or systems described herein will be apparent to one of ordinary skill in the art. The sequences of operations described herein are merely examples, and are not limited to those set forth herein, but may be changed, as will be apparent to one of ordinary skill in the art, with the exception of operations necessarily occurring in a certain order. Also, descriptions of functions and constructions that are well known to one of ordinary skill in the art may be omitted for increased clarity and conciseness. 
     The features described herein may be embodied in different forms, and are not to be construed as being limited to the examples described herein. Rather, the examples described herein have been provided so that this disclosure will be thorough and complete, and will convey the full scope of the disclosure to one of ordinary skill in the art. 
     Hereinafter, examples of the present disclosure will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily carry out the present disclosure. 
     In the drawing, the X direction may be defined as a first direction or a length direction, the Y direction as a second direction or a width direction, and the Z direction as a third direction or a thickness direction. 
     Hereinafter, a coil component according to an embodiment will be described in detail with reference to the accompanying drawings. Referring to the accompanying drawings, the same or corresponding components are denoted by the same reference numerals, and duplicate descriptions thereof will be omitted. 
     Various types of electronic components are used in electronic devices. Various types of coil components may be suitably used for noise removal or the like between these electronic components. 
     For example, the coil component in an electronic device may be used as a power inductor, a high frequency (HF) inductor, a general bead, a bead for high frequency (GHz Bead), a common mode filter, or the like. 
     First Embodiment 
       FIGS.  1  and  2    are schematic diagrams of a coil component according to a first embodiment in the present disclosure.  FIG.  3    is a cross-sectional view taken along line I-I′ in  FIG.  2   .  FIG.  4    is a cross-sectional view taken along line II-II′ in  FIG.  2   .  FIG.  5    is an enlarged view of portion ‘A’ in  FIG.  4   .  FIG.  6    is an enlarged view of portion ‘B’ in  FIG.  4   . A body, applied to the coil component according to the first embodiment, is mainly illustrated in  FIG.  1   , and a coil portion, applied to the coil component according to the first embodiment, is mainly illustrated in  FIG.  2   . 
     Referring to  FIGS.  1  to  6   , a coil component  1000  according to the first embodiment may include a body  100 , a support substrate  200 , coil portions  310  and  320 , lead-out portions  410  and  420 , an insulating layer  500 , and an oxide insulating layer  600 , and may further include external electrodes  710  and  720  and auxiliary lead-out portions  810  and  820 . 
     The body  100  forms the exterior of the coil component  1000  according to an embodiment, and includes coil portions embedded therein. 
     The body  100  may be formed to have a substantially hexahedral shape, for example. 
     Referring to  FIG.  1   , the body  100  has a first surface  101  and a second surface  102  opposing each other in a length direction X, a third surface  103  and a fourth surface  104  opposing each other in a thickness direction Z, and a fifth surface  105  and a sixth surface  106  opposing each other in a width direction Y. Each of the first and second surfaces  101  and  102  of the body  100 , opposing each other, connects the third and fourth surfaces  103  and  104  of the body  100  opposing each other. Each of the fifth and sixth surfaces  105  and  106  of the body  100 , opposing each other, connects the first and second surfaces  101  and  102  of the body  100  opposing each other. In this embodiment, one surface and the other surface of the body  100  refer to the first surface  101  and the second surface  102 , respectively. One end surface and the other end surface of the body  100  refer to the fifth surface  105  and the sixth surface  106  of the body  100 , respectively. 
     As an example, the body  100  may be formed such that the coil component  1000 , including the external electrodes  710  and  720  to be described later, 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 an example thereof is not limited thereto. 
     The body  100  may include a magnetic material and a resin. More specifically, the body  100  may be formed by laminating one or more magnetic composite sheets including a resin and a magnetic material dispersed in the resin. Alternatively, the body  100  may have a structure other than the structure in which the magnetic material is dispersed in the resin. For example, the body  100  may be formed of a magnetic material such as ferrite. 
     The magnetic material may be ferrite or magnetic metal powder particles. 
     The ferrite powder particles may be at least one of spinel type ferrites such as Mg—Zn type, Mn—Zn type, Mn—Mg type, Cu—Zn type, Mg—Mn—Sr type, Ni—Zn type and the like, hexagonal ferrites such as Ba—Zn type, Ba—Mg type, Ba—Ni type, Ba—Co type, Ba—Ni—Co type and the like, garnet type ferrites such as a Y system and the like, and Li-based ferrites. 
     The magnetic metal powder particles may include at least one 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 particles may be at least one of pure iron powder 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 magnetic metal powder particles may be amorphous or crystalline. For example, the magnetic metal powder particles may be Fe—Si—B—Cr amorphous alloy powder particles, but is not limited thereto. 
     The ferrite particle and the magnetic metal powder particles may each have an average diameter of about 0.1 μm to 30 μm, but average diameters thereof are not limited thereto. 
     The body  100  may include two or more types of magnetic materials dispersed in a resin. The phrase “different types of magnetic materials” means that the magnetic materials dispersed in the resin are distinguished from each other by any one of an average diameter, a composition, crystallinity and a shape. Referring to  FIGS.  5  and  6   , the body  100  may include first metal magnetic powder particles  110  and second metal magnetic powder particles  120 , each having a particle diameter smaller than a particle diameter of each of the first metal magnetic powder particles  110 . In this embodiment, the first magnetic metal powder particles  110  may be coarse powder including a compound containing iron (Fe) and niobium (Nb), and the second magnetic metal powder particles  120  may be fine particles including a compound containing iron (Fe). 
     The resin may include, but is not limited to, an epoxy, polyimide, a liquid crystal polymer, or the like, alone or in combination. 
     The support substrate  200  is disposed inside the body  100  and has both surfaces on which the first and second coil portions  310  and  320  are disposed, respectively. The support substrate  200  has a thickness of 10 μm or more and 60 μm or less. 
     The support substrate  200  may be formed of an insulating material including a thermosetting insulating resin such as an epoxy resin, a thermoplastic insulating resin such as polyimide or a photoimageable dielectric resin, or may be formed of an insulating material in which this insulating resin is impregnated with a reinforcing material such as a glass fiber or an inorganic filler. For example, the insulating substrates  251  and  252  may be formed of an insulating material such as prepreg, Ajinomoto Build-up Film (ABF), FR-4, bismaleimide triazine (BT) resin, and a Photo Imageable Dielectric (PID) resin, or the like, but a material thereof is not limited thereto. 
     The inorganic filler may be one or more selected from the group consisting of silica (SiO 2 ), alumina (Al 2 O 3 ), silicon carbide (SiC), barium sulphate (BaSO 4 ), talc, mud, mica powder, aluminum hydroxide (AlOH 3 ), magnesium hydroxide (Mg(OH) 2 ), 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 ). 
     When the support substrate  200  is formed of an insulating material including a reinforcing material, the support substrate  200  may provide further improved rigidity. When the support substrate  200  is formed of an insulating material, not including a glass fiber, the support substrate  200  may be advantageous for thinning of the entire coil portions  310  and  320 . When the support substrate  200  is formed of an insulating material including a photoimageable dielectric resin, the number of processes for forming the coil portions  310  and  320  may be decreased, which is advantageous for reduction in manufacturing costs and formation of fine vias. 
     The coil portions  310  and  320  are disposed on both surfaces of the support substrate  200 , opposing each other, and exhibit characteristics of a coil component. For example, when the coil component  1000  according to this embodiment is used as a power inductor, the coil portions  310  and  320  may stabilize the power of an electronic device by storing an electric field as a magnetic field to maintain an output voltage. 
     Referring to  FIGS.  2  and  4   , each of the first coil portion  310  and the second coil portion  320  may have a flat spiral shape while forming at least one turn around a core portion  111  as an axis in the center thereof. As an example, the first coil portion  310  may form at least one turn around the core portion  111  on one surface of the support substrate  200 . 
     The coil portions  310  and  320  may include a coil pattern having a flat spiral shape. The first and second coil portions  310  and  320 , respectively disposed on both surface opposing each other in the support substrate  200 , may be electrically connected to each other through a via electrode  900  formed in the support substrate  200 . 
     The coil portions  310  and  320  and the via electrode  900  may include a metal having improved electrical conductivity and may be formed of, for example, silver (Ag), palladium (Pd), aluminum (Al), nickel (Ni), titanium (Ti), gold (Au), copper (Cu), platinum (Pt), or alloys thereof. 
     The lead-out portions  410  and  420  extend from the coil portions  310  and  320  to be exposed to the first and second surfaces  101  and  102  of the body  100 , respectively. Referring to  FIGS.  2  to  4   , the first lead-out portion is formed by extending one end of the first coil portion  310  formed on end surface of the support substrate  200 . The first lead-out portion  410  is exposed to the first surface  101  of the body  100 . The second lead-out portion  420  is formed by extending one end of the second coil portion  320  formed on the other surface of the support substrate  200 . The second lead-out portion  420  is exposed to the second surface  102  of the body  100 . 
     The insulating layer  500  is disposed on the third surface  103  and the fourth surface  104  of the body  100 . The insulating layer  500  includes an insulating resin  510  and a filler  520 . As an example, an insulating layer  500  may be formed of an Ajinomoto Build-up Film (ABF) having a thickness lower than a thickness of the support substrate  200 , but a material of the insulating layer  500  is not limited thereto. 
     As an example, the insulating resin  510  may be a thermosetting insulating resin such as an epoxy resin, a thermoplastic insulating resin such as polyimide, or a photosensitive insulating resin, but a material of the insulating resin  510  is not limited thereto. 
     As an example, the filler  520  may be one or more selected from the group consisting of silica (SiO 2 ), alumina (Al 2 O 3 ), silicon carbide (SiC), barium sulphate (BaSO 4 ), talc, mud, mica powder, aluminum hydroxide (AlOH 3 ), magnesium hydroxide (Mg(OH) 2 ), 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 ), but is not limited thereto. In addition, the filler  520  may include an organic filler including a polymer material, but is not limited thereto. 
     In the insulating layer  500 , a plurality of slits  530  are disposed to be spaced apart from each other to expose a portion of the surface of the body  100 . Referring to  FIGS.  1  to  3   , the slit  530  is disposed to expose at least a portion of edges of the third surface  103  and the fourth surface  104  of the body. As an example, the slit  530  may be formed by performing an additional dicing process on the insulating layer  500  before performing a process of laminating the insulating layer  500  on the body  500  and dicing the insulating layer  500  into individual components. For example, the slit  530  may be formed in the insulating layer  500  by adjusting the dicing depth and performing a full-dicing process on a region in which the slit  530  is formed. As a result, the slits  530  are formed on an edge, at which the first surface  101  and the fourth surface  104  of the body  100  are in contact with each other, and an edge at which the second surface  102  and the fourth surface  104  are in contact with each other, respectively. In addition, the slits  530  are formed on an edge, at which the first surface  101  and the third surface  103  of the body  100  are in contact each other, and an edge at which the second surface  102  and the third surface  103  of the body  100  are in contact with each other, respectively. As a result, deformation, caused by a difference in coefficient of thermal expansion (CTE) between the insulating layer  500  and the body  100 , may be prevented. 
     The oxide insulating layer  600  is formed on the first surface  101  and the second surface  102  of the body  100  and the fifth surface  105  and the sixth surface  106  of the body  100 . Specifically, the oxide insulating layer  600  may be formed by oxidizing metal magnetic powder particles  110  and  120  exposed to the first surface  101 , the second surface  102 , the fifth surface  105 , and the sixth surface  106  of the body  100 . For example, when the metal magnetic powder particles  100  and  200  include iron (Fe), the oxide insulating layer  600  may be formed on the first surface  101 , the second surface  102 , the fifth surface  105 , and the sixth surface  106  of the body  100  by acidizing the surface of the body  100  with an acid solution selectively reacting with only iron (Fe). As described above, since the body  100  includes the magnetic metal powder particles  110  and  120  and the resin, the magnetic metal powder particles  110  and  120  may be discontinuously exposed to the surface of the body  100 . Accordingly, oxide insulating layers, formed on surfaces of the magnetic metal powder particles  110  and  120 , may be discontinuously formed on the surface of the body  100 . In this embodiment, after the dicing process is completed, the oxide insulating layer  600  is formed by reacting the surface of the body  100 , on which the insulating layer  500  is laminated, with an acidic solution. As a result, the oxide insulating layer  600  may also be formed on an internal surface of the slit  530 . 
     Since the oxide insulating layer  600  is formed by oxidizing the metal magnetic powder particles  110  and  120 , the oxide insulating layer  600  may include a metal component of the metal magnetic powder particles  110  and  120 . As an example, the oxide insulating layer  600  includes at least one selected from the group consisting of iron (Fe), niobium (Nb), silicon (Si), chromium (Cr), or alloys thereof. 
     The oxide insulating layer  600  is exposed to the surface of the body  100  as well as the magnetic metal powder particles  110  and  120 , but may also be formed on the surfaces of the magnetic metal powder particles  110  and  120  disposed within a predetermined depth from the surface of the body  100 . This is because the above-mentioned acid solution permeates the body  100  to a predetermined depth from the surface of the body  100  due to a relatively porous structure of the resin of the body  100 . The predetermined depth from the surface of the body  100  may refer to 1.5 to 2 times the particle diameter of the first magnetic metal powder particles  110 , but is not limited thereto. 
     Before the external electrodes  710  and  720  are formed by electroplating, the oxide insulating layer  600  may be selectively formed on the surface of the body  100  to be prevented from being plated in a region other than a region in which the external electrodes  710  and  720  are formed. In addition, after the plating process, electrical short-circuits may be prevented from occurring between the coil component  1000  of this embodiment and other electronic components. 
     Referring to  FIG.  6   , recesses  121  may be formed in the first surface  101 , the second surface  102 , the fifth surface  105 , and the sixth surface  106  of the body  100 . The recess  121  is formed because the second metal magnetic powder particles  120 , exposed to the surface of the body  100 , are completely removed during the above-described acidization of the surface of the body  100 . Accordingly, the recess  121  has a diameter corresponding to the particle diameter of the second metal magnetic powder particle  120 . As described above, since the acidic solution may permeate from the surface of the body  100  to the predetermined depth, the second metal magnetic powder particles  120 , disposed within a predetermined depth from the surface of the body  100 , may be removed by reacting with the acid solution. Accordingly, a vacancy corresponding to the particle diameter of the second magnetic metal powder particles  120  may be formed in a corresponding region. 
     In  FIG.  6   , the oxide insulating layer  600  is illustrated as being formed only on the surface of the first magnetic metal powder particle  110 , but the scope of the present disclosure is not limited thereto. For example, the second metal magnetic powder particles  120  may be incompletely removed by reacting with the acid solution depending on a composition of the acid solution used for the above-mentioned acidization, acidization conditions, a composition of the resin and the second metal magnetic powder particles  120  of the body  100 , and the like. In this case, the oxide insulating layer  600  may also be formed on the surfaces of the second magnetic metal powder particles  120 . 
     Referring to  FIGS.  1  and  2   , the insulating layer  500  may be laminated on a surface of the body  100  parallel to the support substrate  200  to alleviate a decrease in a magnetic surface area resulting from the oxide insulating layer  600 . As described above, since the oxide insulating layer  600  is formed by oxidizing the surfaces of the metal magnetic powder particles  110  and  120  exposed to the surface of the body  100 , volumes of the magnetic metal powder particles  110  and  120  within the body  100  are decreased by the oxide insulating layer  600 . Accordingly, component characteristics such as inductance are reduced. In this embodiment, after the insulating layer  500  is disposed on the third and fourth surfaces  103  and  104  of the body  100 , the first, second, fifth, and sixth surfaces  101 ,  102 ,  105 , and  106  may be acidized to relatively reduce the loss of the magnetic metal powder particles  110  and  120 . 
     Table 1 shows rates of change in a surface area of a magnetic material, reduced by etching, when an Ajinomoto Build-up Film (ABF) was not disposed the surface of the body  100  and when an ABF was laminated on the third surface  103  and fourth surface  104  of the body  100 . When the ABF was not disposed on the surface of the body  100 , a surface area of an Etchable magnetic material was 8,960,000 μm 2 . When four surfaces, on which the ABF was not disposed, were acidized, a surface area of an etched magnetic material was 4,160,000 μm 2 . For example, when the ABF was laminated on two surfaces, the surface area of the magnetic material, reduced by the oxide insulating layer  600 , was decreased by 46% as compared with the surface area when the ABF was not disposed. 
     
       
         
           
               
               
               
               
             
               
                   
                 TABLE 1 
               
               
                   
                   
               
               
                   
                 When ABF 
                 When ABF is 
                 Rate of Change 
               
               
                   
                 is not 
                 laminated 
                 in Surface of 
               
               
                   
                 disposed on 
                 on two 
                 Magnetic Material 
               
               
                   
                 surface 
                 surfaces 
                 Decreased by 
               
               
                   
                 of body 
                 of body 
                 Etching 
               
               
                   
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
            
               
                 Surface of Etchable 
                 8,960,000 
                 4,160,000 
                 46% 
               
               
                 Magnetic Material 
               
               
                 (μm 2 ) 
               
               
                   
               
            
           
         
       
     
     In addition, the present applicant measured rates of a decrease in inductance Ls when the ABF was not disposed on a surface of the body  100  and when the ABF is laminated and acidized on the third and fourth surfaces  103  and  104  of the body  100 . When the ABF was not disposed on the surface of the body  100 , a rate of a decrease in the inductance Ls was 3.3% on average. When acidization was performed on four surfaces on which the ABF was not laminated, a rate of a decrease in the inductance 2.0% on average. For example, when the ABF was laminated on two surfaces, the rate of a decrease in the inductance Ls, decreased by the oxide insulating layer  600 , was improved by 62% as compared with the rate of a decrease when the ABF was not disposed. 
     The auxiliary lead-out portions  810  and  820  are disposed on the other surface and one surface of the support substrate  200  to correspond to the lead-out portions  410  and  420 , respectively. Referring to  FIGS.  1  and  2   , a first lead-out portion  410  is disposed on one surface of the support substrate  200 , and a first auxiliary lead-out portion  810  is disposed on the other surface of the support substrate  200 . The second lead-out portion  420  is disposed on the other surface of the support substrate  200 , and the second auxiliary lead-out portion  820  is disposed on one surface of the support substrate  200 . As a result, the first auxiliary lead-out portion  810  is disposed to correspond to the first lead-out portion  410  on the basis of the support substrate  200 , and the second auxiliary lead-out portion  820  is disposed to correspond to the second lead-out portion  420  on the basis of the support substrate  200 . Referring to  FIGS.  1  to  3   , the auxiliary lead-out portions  810  and  820  are exposed to the surface of the body  100  together with the lead-out portions  410  and  420 . In addition, the external electrodes  710  and  720  are formed not only on exposed surfaces of the lead-out portions  410  and  420  but also on exposed surfaces of the auxiliary lead-out portions  810  and  820 . Accordingly, an area of a region, metallically bonded to the first and second external electrodes  710  and  720 , of the surface of the body  100  may be increased to improve bonding force between the body  100  and the external electrodes  710  and  720 . 
     At least one of the coil portions  310  and  320 , the via electrode  900 , the lead-out portions  410  and  420 , and the auxiliary lead-out portions  810  and  820  may include at least one conductive layer. 
     As an example, when the first coil portion  310 , the first lead-out portion  410 , the first auxiliary lead-out portion  810 , and the via electrode  900  may be formed on one surface side of the support substrate  200  by plating, each of the first coil portion  310 , the first lead-out portion  410 , the first auxiliary lead-out portion  810 , and the via electrode  900  may include a seed layer such as an electroless plating layer and an electroplating layer. The electroplating layer may have a single-layer structure or a multilayer structure. The electroplating layer having a multilayer structure may be formed to have a conformal layer structure in which one electroplating layer is covered with another electroplating layer, and may be formed to have a structure in which one electroplating layer is laminated on only one surface of another electroplating layer. A seed layer of the first coil portions  310 , a seed layer of the first lead-out portion  410 , a seed layer of the first auxiliary lead-out portion  810 , and a seed layer of the via electrode  900  may be integrally formed, such that boundaries therebetween may not be formed, but an embodiment thereof is not limited thereto. In the above-described example, an electroplating layers of the first coil portion  310 , an electroplating layer of the first lead-out portion  410 , electroplating layers of the first auxiliary lead-out portion  810 , and an electroplating layer of the via electrode  900  are integrally formed, such that boundaries therebetween may not be formed, but an embodiment thereof is not limited thereto. 
     The coil portions  310  and  320 , the lead-out portions  410  and  420 , the auxiliary lead-out portions  810  and  820 , and the via electrode  900  may be formed of a conductive material such as copper (Cu), aluminum (Al), silver (Ag), tin (Sn), gold (Au), nickel (Ni), lead (Pb), titanium (Ti), or alloys thereof, but a conductive material thereof is not limited thereto. 
     The external electrodes  710  and  720  are disposed on the surfaces of the body  100  to cover the lead-out portions  410  and  420 . 
     Referring to  FIGS.  1  and  2   , since the first lead-out portion  410  is exposed to the first surface  101  of the body  100 , the first external electrode  710  may be formed on the first surface  101  of the body  100  to be connected to the first lead-out portion  410 . The second external electrode  720  may be formed on the second surface  102  of the body  100  to be connected to the second lead-out portion  420  exposed to the second surface  102  of the body  100 . 
     Each of the first external electrode  710  and the second external electrode  720  extends to the third surface  103  and the fourth surface  104  of the body  100 , such that at least a portion of each of the external electrodes  710  and  720  is disposed on the insulating layer  500 . As will be described later, the external electrodes  710  and  720  include a conductive resin layer formed by applying and curing a conductive paste including conductive powder particles such as silver (Ag), or the like, and a conductive resin layer. Such a conductive resin layer extends to the third surface  103  and the fourth surface  104  to be disposed on the insulating layer  500 . 
     The external electrodes  710  and  720  may have a single-layer structure or a multilayer structure. Referring to  FIGS.  3  and  4   , the external electrodes  710  and  720  may include a first layer  711 , covering the lead-out portions  410  and  420 , and a second layer  712  disposed on the first layer  711 . In this embodiment, the first layer  711  may include a conductive resin layer, and the second layer  712  may include a metal layer. As a result, the conductive resin layer of the external electrodes  710  and  720  may fill the slit  530  exposed to one region of the surface of the body  100 , as illustrated in  FIG.  3   . 
     The conductive resin layer may include any one or more conductive metals, selected from the group consisting of copper (Cu), nickel (Ni), and silver (Ag), and a thermosetting resin. The thermosetting resin, included in the conductive resin layer, and the thermosetting resin, included in the body  100 , may be the same thermosetting resin. For example, the body  100  and the conductive resin layer may include an epoxy resin. The thermosetting resins, included in the body  100  and the conductive resin layer, may be formed of the same thermosetting resin, for example, an epoxy resin, to improve adhesion strength between the body  100  and the external electrodes  710  and  720 . 
     Modified Version of First Embodiment 
       FIGS.  7  and  8    are schematic diagrams, each illustrating a coil component according to a modified version of the first embodiment, and  FIG.  9    is a cross-sectional view taken along line III-III′ in  FIG.  8   . A body, applied to the coil component according to a modified version of the first embodiment, is mainly illustrated in  FIG.  7   . A coil portion, applied to the coil component according to a modified version of the first embodiment, is mainly illustrated in  FIG.  8   . 
     A coil component  2000  according to this modified version is different in a distance between slits  530 , spaced apart from each other, and the number of the slits  530 , as compared with the coil component  1000  according to the first embodiment. Therefore, only the distance of the slits  530  and the number of the slits  530 , different from those of the first embodiment, will be described. The descriptions of the first embodiment may be applied to the rest of the configuration of this modified version as it is. 
     Referring to  FIGS.  7  and  8   , a distance between a plurality of slits  530 , spaced apart from each other, of this modified version is shorter than a distance between the slits  530 , spaced apart from each other, of the first embodiment. A structure of the slit  530  of this modified version is formed by reducing a width of a dicing blade to be narrower than in the first embodiment during an additional dicing process on the insulating layer  500 . As a result, the slit  530  is more densely formed on the third surface  103  and the fourth surface  104  of the body  100 . A larger number of slits may be formed in the insulating layer  500  to more effectively prevent deformation caused by a difference in thermal expansion coefficients (CTE) between the insulating layer  500  and the body  100 . 
     Second Embodiment 
       FIGS.  10  and  11    are schematic diagrams, each illustrating a coil component according to a second embodiment in the present disclosure, and  FIG.  12    is a cross-sectional view, taken along line IV-IV′ in  FIG.  11   , of the coil component illustrated in  FIG.  11   . A body, applied to the coil component according to the second embodiment, is mainly illustrated in  FIG.  10   . A coil portion, applied to the coil component according to the second embodiment, is mainly illustrated in  FIG.  11   . 
     A coil component  3000  according to this embodiment is different in shapes and arrangements of a support substrate  200 , lead-out portion  410  and  420 , external electrodes  710  and  720 , as compared with the coil component  1000  according to the first embodiment. Therefore, only the shapes and arrangements of the support substrate  200 , the lead-out portion  410  and  420 , the external electrodes  710  and  720 , different from those of the first embodiment, will be described. The descriptions of the first embodiment may be applied to the rest of the configuration of this embodiment as it is. 
     In this embodiment, the body  100  has a first surface  101  and the second surface  102 , opposing each other, and a third surface  103  and a fourth surface  104  opposing each other while connecting the first surface  101  and the second surface  102 . 
     Referring to  FIGS.  10  and  11   , a support substrate  200  includes a support portion  210 , supporting coil portions  310  and  320 , and end portions  220  and  230  supporting the lead-out portions  410  and  420 . 
     The support portion  210  is one region, disposed between the first and second coil portions  310  and  320 , of the support substrate  200  to support the coil portions  310  and  320 . 
     The end portions  220  and  230  extend from the support portion  210 . The end portions  220  and  230  are one regions of the support substrate  200  supporting the lead-out portions  410  and  420  and the auxiliary lead-out portions  810  and  820 . Specifically, a first end portion  220  is disposed between the first lead-out portion  410  and the first auxiliary lead-out portion  810  to support the first lead-out portion  410  and the first auxiliary lead-out portion  810 . The second end portion  230  is disposed between the second lead-out portion  420  and the second auxiliary lead-out portion  820  to support the second lead-out portion  420  and the second auxiliary lead-out portion  820 . 
     Referring to  FIGS.  10  and  11   , the end portions  220  and  230  may include the first end portion  220 , exposed to the first surface  101  and the fifth surface  105  of the body  100 , and the second end portion  230  exposed to the second surface  102  and the fifth surface  105  of the body  100 . 
     Referring to  FIGS.  10  and  11   , the lead-out portions  410  and  420  include a first lead-out portion  410 , connected to one end portion of the first coil portion  310  and exposed to the first surface  101  and the fifth surface  105  of the body  100 , and a second lead-out portion  420  connected to one end portion of the second coil portion  320  and exposed to the second surface  102  and the fifth surface  105  of the body  100 . For example, in this embodiment, the lead-out portions  410  and  420  are exposed on a surface of the body  100  in an L shape. 
     Accordingly, as compared with the first embodiment, an area, in which the lead-out portions  410  and  420  are disposed inside the body  100 , may be increased to further increase electrical connectivity to the external electrodes  710  and  720 . As a result, connection reliability with the external electrodes  710  and  720  may be improved even without increasing a size of the coil component  3000 . 
     Referring to  FIGS.  10  and  11   , the first external electrode  710  may cover the first lead-out portion  410  and may be disposed on the first surface  101  and the fifth surface  105  of the body  100 , but is not disposed on the third surface  103 , the fourth surface  104 , and the sixth surface  106  of the body  100 . The second external electrode  720  may cover the second lead-out portion  420  and may be disposed on the second surface  102  and the fifth surface  105  of the body  100 , but is not disposed on the third surface  103 , the fourth surface  104 , and the sixth surface  106  of the body  100 . 
     The first and second external electrodes  710  and  720  may have a width narrower than a width of the body  100 . As the external electrode  710  is disposed on portions of the first surface  101  and the fifth surface  105  of the body  100  and the external electrode  720  is disposed on portions of the second surface  102  and the fifth surface  105  of the body  100  and each of the external electrodes  710  and  720  has a width narrower than the width of the body  100 , an influence of the external electrodes  710  and  720 , impeding a flow of magnetic flux, may be reduced to improve inductor performance such as inductance L and quality factor Q. 
     Referring to  FIG.  12   , the external electrodes  710  and  720  may include a first metal layer  711 , covering the lead-out portions  410  and  420 , and a second metal layer  712  disposed on the first metal layer  711 . The first metal layer  711  includes a metal layer, including a conductive material such as copper (Cu), and the second metal layer  712  includes a metal layer including nickel (Ni) and tin (Sn). 
     Modified Version of Second Embodiment 
       FIGS.  13  and  14    are schematic diagrams, each illustrating a coil component according to a modified version of the second embodiment in the present disclosure, and  FIG.  15    is a cross-sectional view taken along line V-V′ in  FIG.  14   . 
     A coil component  4000  according to this modified version is different in a distance between slits  530 , spaced apart from each other, and the number of the slits  530 , as compared with the coil component  3000  according to the second embodiment. Therefore, only the distance of the slits  530  and the number of the slits  530 , different from those of the second embodiment, will be described. The descriptions of the second embodiment may be applied to the rest of the configuration of this modified version as it is. 
     Referring to  FIGS.  13  and  14   , a distance between a plurality of slits  530 , spaced apart from each other, of this modified version is shorter than a distance between the slits  530 , spaced apart from each other, of the second embodiment. A structure of the slit  530  of this modified version is formed by reducing a width of a dicing blade to be narrower than in the second embodiment during an additional dicing process on the insulating layer  500 . As a result, the slit  530  is more densely formed on the third surface  103  and the fourth surface  104  of the body  100 . A larger number of slits may be formed in the insulating layer  500  to more effectively prevent deformation caused by a difference in thermal expansion coefficients (CTE) between the insulating layer  500  and the body  100 . 
     As described above, according to the present disclosure, plating bleeding of an external electrode may be prevented to improve reliability of a coil component. 
     In addition, a decrease in a surface area of a magnetic material of a body may be effectively prevented. 
     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.