Patent Publication Number: US-2020286674-A1

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. 10-2019-0025074 filed on Mar. 5, 2019 in the Korean Intellectual Property Office, the entire disclosure of which is incorporated herein by reference for all purposes. 
     BACKGROUND 
     1. Field 
     The present disclosure relates to a coil component. 
     2. Description of Related Art 
     Inductors, which are coil components, are representative passive electronic components used in electronics along with resistors and capacitors. 
     The coil components may be provided with marking portions to identify mounting directions of the coil components on substrate such as printed circuit boards or the like. 
     Such a marking portion is identified using an identification device. In some cases, it may be difficult to identify the marking portion due to irregular reflection of light due to miniaturization of a coil component, surface roughness of the coil component or the like. 
     SUMMARY 
     An aspect of the present disclosure is to provide a coil component in which an identification portion may be easily identified. 
     According to an aspect of the present disclosure, a coil component includes a body having one surface and the other surface, opposing each other, and a wall surface connecting the one surface and the other surface, a coil portion embedded in the body and having an end exposed to the wall surface of the body, an external electrode including a connecting portion disposed on the wall surface of the body and connected to the end of the coil portion, and an extension extending from the connecting portion onto the one surface of the body, a first insulating layer covering the other surface of the body, and an identification portion passing through the first insulating layer and including the same material as a material of the external electrode. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
       The above and other aspects, features, and advantages of the present disclosure will be more clearly understood from the following detailed description, taken in conjunction with the accompanying drawings, in which: 
         FIG. 1  is a perspective view schematically illustrating a coil component according to a first embodiment; 
         FIG. 2  is a cross-sectional view taken along line I-I′ in  FIG. 1 ; 
         FIG. 3  is a cross-sectional view taken along line II-II′ in  FIG. 1 ; 
         FIG. 4A  and  FIG. 4B  are views illustrating a modified example of an identification portion; 
         FIG. 5  is a perspective view schematically illustrating a coil component according to a second embodiment; 
         FIG. 6  is a cross-sectional view taken along line III-III′ in  FIG. 5 ; and 
         FIG. 7  is a perspective view schematically illustrating a coil component according to a third embodiment. 
     
    
    
     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 would be well known to one of ordinary skill in the art may be omitted for increased clarity and conciseness. 
     The terminology used herein describes particular embodiments only, and the present disclosure is not limited thereby. As used herein, the singular forms “a,” “an,” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “including”, “comprises,” and/or “comprising” when used in this specification, specify the presence of stated features, integers, steps, operations, members, elements, and/or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, members, elements, and/or groups thereof. 
     Throughout the specification, it will be understood that when an element, such as a layer, region or wafer (substrate), is referred to as being “on,” “connected to,” or “coupled to” another element, it may be directly “on,” “connected to,” or “coupled to” the other element or other elements intervening therebetween may be present. In contrast, when an element is referred to as being “directly on,” “directly connected to,” or “directly coupled to” another element, there may be no elements or layers intervening therebetween. Like numerals refer to like elements throughout. As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items. 
     In addition, the term “coupled” is used not only in the case of direct physical contact between the respective constituent elements in the contact relation between the constituent elements, but also in the case in which other constituent elements are interposed between the constituent elements such that they are in respective contact with each other, being used as a comprehensive concept. 
     The drawings may not be to scale, and the relative size, proportions, and depictions of elements in the drawings may be exaggerated for clarity, illustration, and convenience. 
     In the drawing, the L direction may be defined as a first direction or a length direction, the W direction as a second direction or a width direction, and the T direction as a third direction or a thickness direction. 
     Hereinafter, a coil component according to an embodiment in the present disclosure 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 redundant 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, as a coil component in an electronic device, a power inductor, a high frequency inductor (HF Inductor), a general bead, a bead for high frequency (GHz Bead), a common mode filter, or the like may be used. 
     First Embodiment 
       FIG. 1  is a perspective view schematically illustrating a coil component according to a first embodiment.  FIG. 2  is a cross-sectional view taken along line I-I′ in  FIG. 1 .  FIG. 3  is a cross-sectional view taken along line II-II′ in  FIG. 1 .  FIG. 4A  and  FIG. 4B  are views illustrating a modified example of an identification portion. 
     Referring to  FIGS. 1 to 4B , a coil component  1000  according to an embodiment may include a body  100 , a coil portion  200 , first and second external electrodes  300  and  400 , a first insulating layer  510 , and an identification portion  600 , and may further include an internal insulating layer IL, a second insulating layer  520 , and an insulating film IF. 
     The body  100  forms the appearance of the coil component  1000  according to the embodiment. The body  100  may be formed to have a hexahedral shape as a whole. 
     Hereinafter, an embodiment in the present disclosure will be described with reference to a case in which the body  100  has a hexahedral shape by way of example. However, these descriptions do not exclude coil components that include bodies formed to have shapes other than hexahedral, within the scope of the present disclosure. 
     Referring to  FIGS. 2 and 3 , the body  100  has a first surface  101  and a second surface  102  opposing each other in a length direction L, a third surface  103  and a fourth surface  104  opposing each other in a width direction W, and a fifth surface  105  and a sixth surface  106  opposing in a thickness direction T. Each of the first to fourth surfaces  101 ,  102 ,  103  and  104  of the body  100  corresponds to a wall surface of the body  100 , connecting the fifth surface  105  and the sixth surface  106  of the body  100  to each other. In the following description, both opposing end surfaces of the body  100  among a plurality of wall surfaces thereof refer to the first surface  101  and the second surface  102  of the body  100 , and both opposing side surfaces of the body  100  among the plurality of wall surfaces thereof may refer to the third surface  103  and the fourth surface  104  of the body  100 . 
     The body  100  may be formed, in such a manner that, the coil component  1000  according to an embodiment, including first and second external electrodes  300  and  400 , respectively, a first insulating layer  510  and a second insulating layer  520 , to be described later, may be formed to have a length of 2.0 mm, a width of 1.2 mm, and a thickness of 0.65 mm, but an embodiment thereof is not limited thereto. On the other hand, since the above-described numerical values do not take process errors into account, numerical values different from the above-mentioned numerical values, due to process errors, may also be within the scope of the present disclosure. 
     The body  100  may include a magnetic material and a resin. In detail, 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. In addition, the body  100  may also have a structure in addition to 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 a magnetic metal powder. 
     The ferrite powder may be one or more of spinel type ferrite such as Mg—Zn type, Mn—Zn type, Mn—Mg type, Cu—Zn type, Mg—Mn—Sr type, Ni—Zn type or the like, hexagonal ferrite such as Ba—Zn, Ba—Mg, Ba—Ni, Ba—Co, Ba—Ni—Co type, or the like, garnet type ferrite such as Y type or the like, and Li-based ferrite. 
     The magnetic metal powder may include one or more elements 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 include at least one or more powders selected from the group consisting of pure iron powder, Fe—Si alloy powder, Fe—Si—Al alloy powder, Fe—Ni alloy powder, Fe—Ni—Mo alloy powder, Fe—Ni—Mo—Cu alloy powder, Fe—Co alloy powder, Fe—Ni—Co alloy powder, Fe—Cr alloy powder, Fe—Cr—Si alloy powder, Fe—Si—Cu—Nb alloy powder, Fe—Ni—Cr alloy powder, and Fe—Cr—Al alloy powder. 
     The magnetic metal powder may be amorphous or crystalline. For example, the magnetic metal powder may be an Fe—Si—B—Cr amorphous alloy powder, but is not limited thereto. 
     The ferrite and the magnetic metal powder may have an average diameter of about 0.1 μm to 30 μm, respectively, but embodiments thereof are not limited thereto. 
     The body  100  may include two or more kinds of magnetic materials dispersed in a resin. In this case, the term “different kinds of magnetic materials” means that the magnetic materials dispersed in the resin are distinguished from each other by at least one of an average diameter, a composition, crystallinity and a shape. 
     The resin may include, but is not limited to, an epoxy, polyimide, a liquid crystal polymer, or the like, alone or in combination. 
     The body  100  includes the coil portion  200  and a core  110  passing through an internal insulating layer IL, to be described later. The core  110  may be formed by filling a through hole of the coil portion  200  with a magnetic composite sheet, but an embodiment thereof is not limited thereto. 
     The coil portion  200  is embedded in the body  100  to exhibit characteristics of a coil component. For example, when the coil component  1000  according to the embodiment is used as a power inductor, the coil portion  200  may function to stabilize the power supply of an electronic device by storing an electric field as a magnetic field and maintaining an output voltage. Both ends of the coil portion  200  may be exposed to the first and second surfaces  101  and  102  of the body  100 . 
     The coil portion  200  applied to this embodiment includes a first coil pattern  211 , a second coil pattern  212 , and a via  220 . 
     The first coil pattern  211 , the internal insulating layer IL and the second coil pattern  212  to be described later may be sequentially laminated in a thickness direction T of the body  100 . 
     Each of the first coil pattern  211  and the second coil pattern  212  may be formed to have a planar spiral shape. As an example, the first coil pattern  211  may include at least one turn about the core  110  of the body  100  on one surface of the internal insulating layer IL (a lower surface of IL in  FIG. 2 ). The second coil pattern  212  may include at least one turn about the core  110  of the body  100  on the other surface of the internal insulating layer IL (an upper surface of IL in  FIG. 2 ). The first and second coil patterns  211  and  212  may be wound in the same direction. 
     The via  220  penetrates through the internal insulating layer IL to electrically connect the first coil pattern  211  and the second coil pattern  212  to each other, to respectively be in contact with the first coil pattern  211  and the second coil pattern  212 . As a result, the coil portion  200  according to the embodiment may be formed as a single coil that generates a magnetic field in the thickness direction T of the body  100  in the body  100 . 
     At least one of the first coil pattern  211 , the second coil pattern  212 , and the via  220  may include at least one conductive layer. 
     As an example, in the case in which the second coil pattern  212  and the vias  220  are formed by a plating method, the second coil pattern  212  and the via  220  may each include a seed layer and an electroplating layer. The seed layer may be formed by an electroless plating method or a vapor deposition method such as sputtering or the like. The electroplating layer may have a single-layer structure or a multi-layer structure. The electroplating layer of the multi-layer structure may be formed to have a conformal film structure in which one electroplating layer is covered by another electroplating layer, and may also be formed to have a form in which only on one surface of one electroplating layer, another electroplating layer is laminated. A seed layer of the second coil pattern  212  and a seed layer of the via  220  may be integrally formed without a boundary being formed therebetween, but an embodiment thereof is not limited thereto. The electroplated layer of the second coil pattern  212  and the electroplated layer of the via  220  may be integrally formed without a boundary being formed therebetween, but an embodiment thereof is not limited thereto. 
     As another example, in a case in which the first coil pattern  211  and the second coil pattern  212  are separately formed and then laminated together on the internal insulating layer IL to form the coil portion  200 , the via  220  may include a high melting point metal layer and a low melting point metal layer having a melting point lower than that of the high melting point metal layer. In this case, the low melting point metal layer may be formed of a solder containing tin (Sn). The low melting point metal layer is at least partially melted due to pressure and temperature at the time of lamination, in such a manner that an intermetallic compound layer (IMC layer) may be formed to have at least one of interfaces between the low melting point metal layer and the first coil pattern  211 , between the low melting point metal layer and the second coil pattern  212 , and between the high melting point metal layer and the low melting point metal layer. 
     In an example referring to  FIG. 2 , the first coil pattern  211  and the second coil pattern  212  may protrude from a lower surface and an upper surface of the internal insulating layer IL, respectively. In another example with reference to  FIG. 2 , the first coil pattern  211  may be embedded in the lower surface of the internal insulating layer IL in such a manner that a lower surface thereof is exposed to the lower surface of the internal insulating layer IL, and the second coil pattern  212  may be exposed to an upper surface of the internal insulating layer IL. In this case, a concave portion is formed in the lower surface of the first coil pattern  211 , such that the lower surface of the internal insulating layer IL and the lower surface of the first coil pattern  211  may not be located on the same plane. As another examples with reference to  FIG. 2 , the first coil pattern  211  may be embedded in the lower surface of the internal insulating layer IL in such a manner that the lower surface thereof is exposed to the lower surface of the internal insulating layer IL, and the second coil pattern  212  may be embedded in the upper surface of the internal insulating layer IL in such a manner that an upper surface thereof may be exposed to the upper surface of the internal insulating layer IL. 
     Ends of the first coil pattern  211  and the second coil pattern  212  may be exposed to the first and second surfaces  101  and  102  of the body  100 , respectively. An end of the first coil pattern  211  exposed to the first surface  101  of the body  100  contacts a first external electrode  300  to be described later, to be electrically connected to the first external electrode  300 . An end of the second coil pattern  212  exposed to the second surface  102  of the body  100  contacts a second external electrode  400  to be described later, to be electrically connected to the second external electrode  400 . 
     The first coil pattern  211 , the second coil pattern  212  and the vias  220  may respectively be formed of a conductive material, such as copper (Cu), aluminum (Al), silver (Ag), tin (Sn), gold (Au), nickel (Ni), lead (Pb), titanium (Ti), alloys thereof, or the like, but a material thereof is not limited thereto. 
     The first and second coil patterns  211  and  212  are formed on both surfaces of the internal insulating layer IL, respectively. For example, the internal insulating layer IL supports the first and second coil patterns  211  and  212 . 
     The internal insulating layer IL 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 an insulating material in which a reinforcing material such as glass fiber or inorganic filler is impregnated with these insulating resins. For example, the internal insulating layer IL may be formed of an insulating material such as a prepreg, an Ajinomoto Build-up Film (ABF), an FR-4, a Bismaleimide Triazine (BT) resin, or photoimageable dielectric (PID), but an embodiment thereof is not limited thereto. 
     The inorganic filler may be one or more compounds 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 (Al(OH) 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 ). 
     In the case in which the internal insulating layer IL is formed of an insulating material including a reinforcing material, the internal insulating layer IL may provide relatively better rigidity. In the case in which the internal insulating layer IL is formed of an insulating material not containing a glass fiber, the internal insulating layer IL may be advantageous in terms of thinning an overall thickness of the coil component  1000  according to the embodiment. In the case in which the internal insulating layer IL is formed of an insulating material containing a photoimageable dielectric resin, the number of processes is reduced, which may be advantageous in terms of reducing production costs and fine hole processing. 
     The first and second external electrodes  300  and  400  are spaced apart from each other on the sixth surface  106  of the body  100 , and are respectively connected to the coil portion  200 . The first external electrode  300  includes a first connection portion  310  disposed on the first surface  101  of the body  100  and connected to an end of the first coil pattern  211 , and a first extension  320  extending from the first connection portion  310  onto the sixth surface  106  of the body  100 . The second external electrode  400  includes a second connection portion  410  disposed on the second surface  102  of the body  100  and connected to an end of the second coil pattern  212 , and a second extension  420  extending from the second connection portion  410  onto the sixth surface  106  of the body  100 . The first extension  320  and the second extension  420  disposed on the sixth surface  106  of the body  100  are spaced apart from each other to prevent a short between the first external electrode  300  and the second external electrode  400 . In this embodiment, since the second insulating layer  520  to be described later is disposed on the entirety of the sixth surface  106  of the body  100 , the first and second extensions  320  and  420  of the first and second external electrodes  300  and  400  extend onto the second insulating layer  520 , to be spaced apart from each other on the second insulating layer  520 . 
     The first and second external electrodes  300  and  400  electrically connect the coil component  1000  to a printed circuit board or the like when the coil component  1000  according to an embodiment is mounted on the printed circuit board or the like. As an example, the coil component  1000  according to the embodiment may be mounted after the sixth surface  106  of the body  100  is disposed to face the printed circuit board. Therefore, the coil component  1000  according to the embodiment may be easily connected to a printed circuit board or the like due to the first and second extensions  320  and  420  together disposed on the sixth surface  106  of the body  100 . 
     Each of the first and second external electrodes  300  and  400  may include at least one electroplating layer. Each of the external electrodes  300  and  400  in this embodiment includes a first electrode layer  11  disposed on a surface of the body  100 , and a second electrode layer  12  disposed on the first electrode layer  11 . The first electrode layer  11  may be formed through a first electroplating process using a first electrolytic plating solution, and the second electrode layer  12  may be formed through a second electroplating process using a second electrolytic plating solution. The first electrolytic plating solution may contain copper (Cu) ions, and the second electrolytic plating solution may include nickel (Ni) ions. As a result, the first electrode layer  11  and the second electrode layer  12  sequentially formed through the first and second electroplating processes may each include copper (Cu) and nickel (Ni). On the other hand, the second electrode layer  12  may have a structure of a plurality of layers. For example, the second electrode layer  12  may be formed to have a multilayer structure comprised of a nickel-plated layer containing nickel (Ni) and a tin plating layer disposed on the nickel plated layer and containing tin (Sn). In this case, the second electrode layer  12  may be formed by sequentially exposing the body  100  having the first electrode layer  11  to the second electrolytic solution containing nickel (Ni) ions and a third electrolytic solution containing tin (Sn) ions. 
     The first insulating layer  510  is disposed on the fifth surface  105  of the body  100  to cover the fifth surface  105  of the body  100 . The first insulating layer  510  may be formed by laminating an insulating film on the fifth surface  105  of the body  100  or by applying an insulating paste to the fifth surface  105  of the body  100 . 
     The first insulating layer  510  may include a thermoplastic resin such as a polystyrene type, a vinyl acetate type, a polyester type, a polyethylene type, a polypropylene type, a polyamide type, a rubber, acrylic resin or the like, a thermosetting resin such as phenol-based, epoxy-based, urethane-based, melamine-based, alkyd-based resin or the like, a photoimageable resin, or an insulating resin such as parylene. 
     The first insulating layer  510  may further include a filler dispersed in the above-described insulating resin. The filler may be an inorganic filler or an organic filler, a powder phase of an insulating resin. 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 ). 
     A side surface of the first insulating layer  510  and at least one of the first to fourth surfaces  101 ,  102 ,  103  and  104  of the body  100  may be disposed on substantially the same plane. The coil component  1000  according to this embodiment may be manufactured by manufacturing a coil substrate having a plurality of bodies connected to each other, separating the plurality of bodies along a dicing line of the coil substrate, and then forming external electrodes on surfaces of the respective bodies. The first insulating layer  510  and the second insulating layer  520  to be described later may be disposed on both surfaces of the coil substrate before the dicing process, respectively. Therefore, when the dicing process is performed thereafter, a side surface of the first insulating layer  510  and the first to fourth surfaces  101 ,  102 ,  103  and  104  of the body  100  in each separated body correspond to cut surfaces, and may thus be disposed on substantially the same plane. 
     The identification portion  600  may be formed for identifying a mounting direction and the like when the coil component  1000  according to the embodiment is mounted on a printed circuit board or the like. 
     The identification portion  600  penetrates through the first insulating layer  510  and includes the same material as that of the first and second external electrodes  300  and  400 . In detail, in a process of forming the first and second external electrodes  300  and  400 , the identification portion  600  and the first and second external electrodes  300  and  400  are formed together. As a result, the identification portion  600  may include the same material as that of the first and second external electrodes  300  and  400 . In the case in which the first and second external electrodes  300  and  400  are formed to have a multilayer structure including the first electrode layer  11  and the second electrode layer  12 , respectively, the identification portion  600  is also formed to have a multilayer structure including a first pattern layer  610  and a second pattern layer  620 . For example, the first electrode layer  11  and the first pattern layer  610  are formed together in the first electroplating process, and may thus include the same material. In addition, the second electrode layer  12  and the second pattern layer  620  are formed together in the second electroplating process, and may thus include the same material. As an example, the first electrode layer  11  and the first pattern layer  610  may include copper (Cu), and the second electrode layer  12  and the second pattern layer  620  may include nickel (Ni). In one embodiment, the second electrode layer  12  and the second pattern layer  620  may include a nickel-plated layer containing nickel (Ni) and a tin plating layer disposed on the nickel plated layer and containing tin (Sn). 
     The identification portion  600  may be formed by forming the first insulating layer  510  on the fifth surface  105  of the body  100 , forming an opening, exposing the fifth surface  105  of the body  100 , in the first insulating layer  510 , and then forming a conductive material in the opening through the above-described electrolytic plating process. The opening of the first insulating layer  510  may be formed by irradiating a laser to the first insulating layer  510 . In this case, a portion of the fifth surface  105  side of the body  100  exposed through the opening is removed together with the first insulating layer  510  by a laser, such that a groove may be formed in the fifth surface  105  of the body  100 . In this case, the identification portion  600  may be formed in such a manner that the identification portion  600  passes through the first insulation layer  510 , and at least a portion of the identification portion  600  extends to the inside of the body  100 . 
     Therefore, the identification portion  600  is exposed to the other surface (an upper surface with reference to  FIG. 2 ) of the first insulating layer  510 , opposing one surface (a lower surface with reference to  FIG. 2 ) of the first insulating layer  510 , in contact with the body  100 . An exposed surface of the identification portion  600  may not be disposed on the same plane as the other surface of the first insulating layer  510 , depending on plating conditions and the size of the opening of the first insulating layer  510 . When the exposed surface of the identification portion  600  and the other surface of the first insulating layer  510  are not disposed on the same plane, the identification portion  600  may be more easily recognized by a height difference between the first insulating layer  510  and the identification portion  600  using an identification device. For example, since a path difference of light irradiated by the identification device is caused, the recognition of the identification portion  600  may be relatively further facilitated. 
     The identification portion  600  may be modified to have various forms as illustrated in  FIGS. 4A and 4B . For example, the identification portion  600  may be formed to have a quadrangular shape as illustrated in  FIG. 1  or the like, and may be formed to have a circular or triangular shape as illustrated in  FIGS. 4A and 4B . The shapes of the identification portion  600  illustrated in  FIGS. 1, 4A and 4B  are merely illustrative, and thus the scope of the present disclosure is not limited thereto. 
     Since the body  100  and the first insulating layer  510  are formed of a material including a curable resin, surface roughness is formed due to shrinkage and expansion during curing. Therefore, light of the identification device that identifies an identification mark of the electronic component is irregularly reflected due to the surface roughness of the body  100  and the first insulating layer  510 . As a result, in this case, the recognition of the identification mark is not facilitated. On the other hand, in the case of this embodiment in the present disclosure, since the identification portion  600  is formed by electrolplating, the identification portion  600  may be identified more easily by the identification device. For example, since a surface of the identification portion has a significantly lower surface roughness value than the surface roughness of the body portion in terms of plating layer characteristics, the light of the identification device is prevented from being irregularly reflecting on the surface of the identification portion. 
     The second insulating layer  520  may be disposed on the sixth surface  106  of the body  100 . The second insulating layer  520  may be formed by laminating an insulating film on the sixth surface  106  of the body  100  or by applying an insulating paste to the sixth surface  106  of the body  100 . A side surface of the second insulating layer  520  and at least one of the first to fourth surfaces  101 ,  102 ,  103  and  104  of the body  100  may be disposed on substantially the same plane. 
     As described in  FIG. 3 , one or more third insulating layer  530  may be disposed on the third and fourth surfaces  103  and  104  of the body  100 . The third insulating layer  530  may be formed on the third and fourth surfaces  103  and  104  of each body  100  after the dicing process described above is performed. The third insulating layer  530  may be formed of an insulating film including an insulating resin, or may be formed of an insulating paste including an insulating resin. The third insulating layer  530  may include a photoimageable dielectric resin. 
     In forming the first and second external electrodes  300  and  400  on the first and second surfaces  101  and  102  of the body  100  by a plating process, the third insulating layer  530  may be used as a plating resist, together with the first and second insulating layers  510  and  520 . Thus, the third insulating layer  530  may be formed on the first and second surfaces  101  and  102  of the body  100  as well as on the third and fourth surfaces  103  and  104  of the body  100 . In this case, in regions of the third insulating layer  530 , disposed on the first and second surfaces  101  and  102  of the body  100 , openings may be formed to correspond to the first and second connection portions  310  and  410  of the first and second external electrodes  300  and  400 , respectively, while exposing both ends of the coil portion  200  exposed to the first and second surfaces  101  and  102  of the body  100 . 
     The insulating film IF may be formed along the surfaces of the first coil pattern  211 , the internal insulating layer IL, and the second coil pattern  212 . The insulating film IF protects and insulates the respective coil patterns  211  and  212 , and includes a known insulating material such as parylene. Any insulating materials may be used for the insulating film IF without particular limitations. The insulating film IF may be formed by vapor deposition or the like, but an embodiment thereof is not limited thereto. For example, the insulating film IF may be formed by forming an insulating material such as an insulating film on both surfaces of the internal insulating layer IL on which the first and second coil patterns  211  and  212  are formed. The above-described insulating film IF may be omitted in this embodiment depending on design requirements or the like. 
     Although not illustrated in the drawings, at least one of the first coil pattern  211  and the second coil pattern  212  may be formed of a plurality of layers. As an example, the coil portion  200  may have a structure in which a plurality of first coil patterns  211  are formed, in detail, one of the first coil patterns is laminated on another first coil pattern. In this case, an additional insulating layer may be disposed between the plurality of first coil patterns  211 , and a connecting via may be formed in the additional insulating layer to penetrate therethrough, to connect the adjacent first coil patterns to each other. 
     Second Embodiment 
       FIG. 5  is a perspective view schematically illustrating a coil component  2000  according to a second embodiment.  FIG. 6  is a cross-sectional view taken along line in  FIG. 5 . 
     Referring to  FIGS. 1 to 6 , a coil component  2000  according to the embodiment differs from the coil component  1000  according to the first embodiment, in that a second insulating layer  520  is different from that in the first embodiment. Therefore, in describing this embodiment, only the second insulating layer  620  will be described. For the remaining configurations according to the embodiment, the above description of the first embodiment may be applied thereto as it is. 
     Referring to  FIGS. 5 and 6 , an opening pattern corresponding to the first and second extensions  320  and  420  is formed in the second insulating layer  520  applied to the present embodiment. The opening pattern may be formed by forming the second insulating layer  620  on the sixth surface  106  of the body  100  and then selectively removing a region corresponding to a region of formation of the extensions  320  and  420  from the second insulating layer  520 . In the case in which the second insulating layer  520  includes a photoimageable dielectric resin, the opening pattern may be formed through a photolithography process. 
     Therefore, the first and second extensions  320  and  420  of the first and second external electrodes  300  and  400  may directly contact the sixth surface  106  of the body  100 . As a result, a thickness of the coil component  2000  according to the embodiment may be reduced. 
     Third Embodiment 
       FIG. 7  is a perspective view schematically illustrating a coil component  3000  according to a third embodiment. 
     Referring to  FIGS. 1 to 4 and 7 , a coil component  3000  according to the embodiment has a coil portion  200  different from those of the first and second embodiments as compared with the coil components  1000  and  2000  according to the first and second embodiments. Therefore, in describing this embodiment, only the coil portion  200  will be described. For the remaining configurations of the embodiment, the above descriptions of the first and second embodiments may be applied thereto as is. 
     Referring to  FIG. 7 , the coil portion  200  applied to this embodiment may be a wire-wound coil. 
     The coil portion  200  is an air-core coil, and may be constituted by a rectangular coil. The coil portion  200  may be formed by spirally winding a metal wire such as a copper (Cu) wire or the like of which a surface is coated with an insulating material. 
     The coil portion  200  may be comprised of a plurality of layers. Each layer of the coil portion  200  is formed to have a flat spiral shape and may have a plurality of turn numbers. 
     In the case of this embodiment, by using a wire-wound coil formed of a metal wire as the coil portion  200 , the coil component may be manufactured by a simpler method. 
     As set forth above, according to an embodiment, an identification portion may be identified relatively easily. 
     While this disclosure includes specific examples, it will be apparent to one of ordinary skill in the art that various changes in form and details may be made in these examples without departing from the spirit and scope of the claims and their equivalents. The examples described herein are to be considered in a descriptive sense only, and not for purposes of limitation. Descriptions of features or aspects in each example are to be considered as being applicable to similar features or aspects in other examples. Suitable results may be achieved if the described techniques are performed to have a different order, and/or if components in a described system, architecture, device, or circuit are combined in a different manner, and/or replaced or supplemented by other components or their equivalents. Therefore, the scope of the disclosure is defined not by the detailed description, but by the claims and their equivalents, and all variations within the scope of the claims and their equivalents are to be construed as being included in the disclosure.