Patent Publication Number: US-11664156-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 10-2020-0055431 filed on May 8, 2020 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 typical passive electronic component used in electronic devices, along with a resistor and a capacitor. 
     As electronic devices tend to have higher performance and to be smaller, coil components used in electronic devices may be increased in number and decreased in size. Accordingly, there have been continuous developments in a thin-film inductor in which a coil portion is formed on a substrate by plating, a coil formed on the substrate is embedded with a magnetic material sheet, and an external electrode is formed on an external surface of a magnetic body. 
     To identify a direction, in which a coil component is mounted on amounting board, or the like, a marking portion may be formed on an upper surface of a body. When a marking portion is formed using a screen-printing method according to the related art, the marking portion has a shape protruding from a surface of the body. As a result, a size of the entire component is increased by the thickness of the protruding marking portion. 
     Accordingly, there is an increasing need to manufacture a coil component in which a marking portion does not protrude from the entire component to achieve lightness, thinness, shortness, and smallness of the component. 
     In addition, when an insulating layer is formed on a surface of a body of the related art using a spray method or the like, the insulating layer may extend to a marking portion region of an upper surface of the body to cover a marking portion. 
     Accordingly, there is a need to selectively form an insulating layer only on the surfaces of a body on which a marking portion is not formed. 
     SUMMARY 
     This Summary is provided to introduce a selection of concepts in simplified form that are further described below in the Detailed Description. This Summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter. 
     An aspect of the present disclosure is to provide a coil component in which a marking portion does not protrude from the entire component to achieve lightness, thinness, shortness, and smallness of the component. 
     Another aspect of the present disclosure is to provide a coil component in which an insulating layer is selectively formed only on the surfaces of a body on which a marking portion is not formed. 
     According to an aspect of the present disclosure, a coil component includes a support substrate, a coil portion disposed on at least one surface of the support substrate, a body, in which the support substrate and the coil portion are disposed, having one surface and the other surface opposing each other, a first external electrode and a second external electrode disposed on the other surface of the body to be spaced apart from each other and connected to the coil portion, a marking portion disposed on the one surface of the body, and a first insulating layer disposed on the one surface of the body and having an opening exposing the marking portion. The marking portion has a thickness less than or equal to a thickness of the first insulating layer. 
    
    
     
       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 diagram of a coil component according to a first embodiment of the present disclosure; 
         FIG.  2    is a cross-sectional view taken along line I-I′ of  FIG.  1   ; 
         FIG.  3    is a view illustrating a coil component according to a first modified embodiment of the first embodiment of the present disclosure and corresponding to the cross-sectional view taken along line I-I′ of  FIG.  1   ; 
         FIG.  4    is a view illustrating a coil component according to a second modified embodiment of the first embodiment of the present disclosure and corresponding to the cross-sectional view taken along line I-I′ of  FIG.  1   ; 
         FIG.  5    is a view illustrating a coil component according to a third modified embodiment of the first embodiment of the present disclosure and corresponding to the cross-sectional view taken along line I-I′ of  FIG.  1   ; 
         FIG.  6    is a schematic diagram of a coil component according to a second embodiment of the present disclosure; 
         FIG.  7    is a view of a body of the coil component in  FIG.  6   , when viewed from below; 
         FIG.  8    is a cross-sectional view taken along line II-II′ in  FIG.  6   ; 
         FIG.  9    is a view illustrating a coil component according to a first modified embodiment of the second embodiment of the present disclosure and corresponding to the cross-sectional view taken along line II-II′ of  FIG.  6   ; 
         FIG.  10    is a view illustrating a coil component according to a second modified embodiment of the second embodiment of the present disclosure and corresponding to the cross-sectional view taken along line II-II′ of  FIG.  6   ; and 
         FIG.  11    is a view illustrating a coil component according to a third modified embodiment of the second embodiment of the present disclosure and corresponding to the cross-sectional view taken along line II-II′ of  FIG.  6   . 
     
    
    
     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 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 fully convey the scope of the disclosure to one of ordinary skill in the art. 
     Herein, it is noted that use of the term “may” with respect to an example or embodiment, e.g., as to what an example or embodiment may include or implement, means that at least one example or embodiment exists in which such a feature is included or implemented while all examples and embodiments are not limited thereto. 
     Throughout the specification, when an element, such as a layer, region, or substrate, is described as being “on,” “connected to,” or “coupled to” another element, it may be directly “on,” “connected to,” or “coupled to” the other element, or there may be one or more other elements intervening therebetween. In contrast, when an element is described as being “directly on,” “directly connected to,” or “directly coupled to” another element, there may be no other elements intervening therebetween. 
     As used herein, the term “and/or” includes any one and any combination of any two or more of the associated listed items. 
     Although terms such as “first,” “second,” and “third” may be used herein to describe various members, components, regions, layers, or sections, these members, components, regions, layers, or sections are not to be limited by these terms. Rather, these terms are only used to distinguish one member, component, region, layer, or section from another member, component, region, layer, or section. Thus, a first member, component, region, layer, or section referred to in examples described herein may also be referred to as a second member, component, region, layer, or section without departing from the teachings of the examples. 
     Spatially relative terms such as “above,” “upper,” “below,” and “lower” may be used herein for ease of description to describe one element&#39;s relationship to another element as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, an element described as being “above” or “upper” relative to another element will then be “below” or “lower” relative to the other element. Thus, the term “above” encompasses both the above and below orientations depending on the spatial orientation of the device. The device may also be oriented in other ways (for example, rotated 90 degrees or at other orientations), and the spatially relative terms used herein are to be interpreted accordingly. 
     The terminology used herein is for describing various examples only, and is not to be used to limit the disclosure. The articles “a,” “an,” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms “comprises,” “includes,” and “has” specify the presence of stated features, numbers, operations, members, elements, and/or combinations thereof, but do not preclude the presence or addition of one or more other features, numbers, operations, members, elements, and/or combinations thereof. 
     Due to manufacturing techniques and/or tolerances, variations of the shapes illustrated in the drawings may occur. Thus, the examples described herein are not limited to the specific shapes illustrated in the drawings, but include changes in shape that occur during manufacturing. 
     The features of the examples described herein may be combined in various ways as will be apparent after gaining an understanding of the disclosure of this application. Further, although the examples described herein have a variety of configurations, other configurations are possible as will be apparent after gaining an understanding of the disclosure of this application. 
     The drawings may not be to scale, and the relative size, proportions, and depiction of elements in the drawings may be exaggerated for clarity, illustration, and convenience. 
     A value used to describe a parameter such as a 1-D dimension of an element including, but not limited to, “length,” “width,” “thickness,” “diameter,” “distance,” “gap,” and/or “size,” a 2-D dimension of an element including, but not limited to, “area” and/or “size,” a 3-D dimension of an element including, but not limited to, “volume” and/or “size”, and a property of an element including, not limited to, “roughness,” “density,” “weight,” “weight ratio,” and/or “molar ratio” may be obtained by the method(s) and/or the tool(s) described in the present disclosure. The present disclosure, however, is not limited thereto. Other methods and/or tools appreciated by one of ordinary skill in the art, even if not described in the present disclosure, may also be used. 
     In the drawings, the X direction may be defined as a first direction or a longitudinal direction, a Y direction as a second direction or a width direction, and a Z direction as a third direction or a thickness direction. 
     Hereinafter, a coil component according to an exemplary embodiment will be described in detail with reference to the accompanying drawings, and in describing with reference to the accompanying drawings, the same or corresponding components are assigned the same reference numbers, and overlapped descriptions thereof will be omitted. 
     Various types of electronic components are used in electronic devices, and various types of coil components may be appropriately used to remove noise between the electronic components. 
     For example, in electronic devices, coil components may be used as power inductors, high-frequency (HF) inductors, general beads, high-frequency beads (GHz Beads), and common mode filters. 
     First Embodiment 
       FIG.  1    is a schematic diagram of a coil component according to a first embodiment, and  FIG.  2    is a cross-sectional view taken along line I-I′ of  FIG.  1   . 
     Referring to  FIGS.  1  and  2   , a coil component  1000  according to a first embodiment may include a body  100 , a support substrate  200 , a coil portion  300 , external electrodes  610  and  620 , a marking portion  440 , a first insulating layer  410 , a coating layer  450 , a second insulating layer  420 , and a third insulating layer  430 . 
     The support substrate  200  is disposed in the body  100  to be described later and supports the coil portion  300 . 
     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 photosensitive insulating resin, or may be formed of an insulating material in which a reinforcing material such as a glass fiber or an inorganic filler is impregnated with such an insulating resin. For example, the support substrate  200  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, and the like, but the present disclosure is not limited thereto. 
     The inorganic filler may be at least one or more selected from a group consisting of silica (SiO 2 ), alumina (Al 2 O 3 ), silicon carbide (SiC), barium sulfate (BaSO 4 ), talc, mud, a 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 ). 
     When the support substrate  200  is formed of an insulating material including a reinforcing material, the support substrate  200  may provide better rigidity. When the support substrate  200  is formed of an insulating material not including glass fibers, the support substrate  200  may be advantageous for thinning the overall coil portions  310  and  320 . 
     A through-hole, not illustrated, is formed through a central portion of the support substrate  200 , and the through-hole, not illustrated, may be filled with a magnetic material of the body  100  to be described later to form a core portion  110 . As described above, the core portion  110  filled with the magnetic material may be formed to improve performance of an inductor. 
     The body  100  may form an exterior of the coil component  1000  according to this embodiment, and may embed the coil portion  300  therein. 
     The body  100  may be formed to have a hexahedral shape overall. 
     Based on  FIG.  1   , the body  100  may have 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 width direction Y, and a fifth surface  105  and a sixth surface  106  opposing each other in a thickness direction Z. In this embodiment, the fifth surface  105  and the sixth surface  106  of the body  100  may correspond to one surface and the other surface, respectively. The first to fourth surfaces  101 ,  102 ,  103 , and  104  of the body  100  may correspond to a plurality of side surfaces of the body  100  connecting the fifth surface  105  and the sixth surface  106  of the body  100  to each other. 
     The body  100  may be formed such that the coil component  1000  according to this embodiment, in which the external electrodes  610  and  620  to be described later are formed, has a length of 2.0 mm, a width of 1.2 mm, and a thickness of 0.65, or a length of 1.6 mm, a width of 0.8 mm, and a thickness of 0.5 mm, but the present disclosure is not limited thereto. 
     The body  100  may include a magnetic material and a resin. Specifically, the body  100  may be formed by laminating at least one magnetic composite sheet including the resin and the magnetic material dispersed in the resin. The body  100  may have a structure other than the structure in which the magnetic material may be dispersed in the resin. For example, the body  100  may be formed of a magnetic material such as ferrite. 
     The magnetic material may be, for example, a ferrite powder particle or a magnetic metal powder particle. 
     Examples of the ferrite powder particle may include at least one or more of spinel type ferrites such as Mg—Zn-based ferrite, Mn—Zn-based ferrite, Mn—Mg-based ferrite, Cu—Zn-based ferrite, Mg—Mn—Sr-based ferrite, Ni—Zn-based ferrite, and the like, hexagonal ferrites such as Ba—Zn-based ferrite, Ba—Mg-based ferrite, Ba—Ni-based ferrite, Ba—Co-based ferrite, Ba—Ni—Co-based ferrite, and the like, garnet type ferrites such as Y-based ferrite, and the like, and Li-based ferrites. 
     The magnetic metal powder particle may include one or more selected from the group consisting of iron (Fe), silicon (Si), chromium (Cr), cobalt (Co), molybdenum (Mo), aluminum (Al), niobium (Nb), copper (Cu), and nickel (Ni). For example, the magnetic metal powder particle may be at least one or more of a pure iron powder, a Fe—Si-based alloy powder, a Fe—Si—Al-based alloy powder, a Fe—Ni-based alloy powder, a Fe—Ni—Mo-based alloy powder, a Fe—Ni—Mo—Cu-based alloy powder, a Fe—Co-based alloy powder, a Fe—Ni—Co-based alloy powder, a Fe—Cr-based alloy powder, a Fe—Cr—Si-based alloy powder, a Fe—Si—Cu—Nb-based alloy powder, a Fe—Ni—Cr-based alloy powder, and a Fe—Cr—Al-based alloy powder. 
     The metallic magnetic material may be amorphous or crystalline. For example, the magnetic metal powder particle may be a Fe—Si—B—Cr-based amorphous alloy powder, but the present disclosure is not limited thereto. 
     Each of the ferrite powder and the magnetic metal powder particle may have an average diameter of about 0.1 μm to 30 μm, but the present disclosure is not limited thereto. 
     The body  100  may include two or more types of magnetic materials dispersed in a resin. In this case, the term “different types of magnetic material” means that the magnetic materials dispersed in the resin are distinguished from each other by average diameter, composition, crystallinity, and a shape. 
     The resin may include an epoxy, a polyimide, a liquid crystal polymer, or the like, in a single form or in combined forms, but the preset disclosure is not limited thereto. 
     The body  100  may include the core portion  100  penetrating through the coil portion  300  to be described later. The core portion  110  may be formed by filling a through-hole with the magnetic composite sheet, but the present disclosure is not limited thereto. 
     The coil portion  300  may be disposed in the body  100  to express characteristics of the coil component. For example, when the coil component  1000  of this embodiment is used as a power inductor, the coil portions  300  may function to stabilize a power supply of an electronic device by storing an electric field as a magnetic field and maintaining an output voltage. 
     The coil portion  300  applied to this embodiment may include first and second coil patterns  310  and  320  and first and second lead-out patterns  311  and  312 . 
     The coil portion  300  may be disposed on one surface and the other surface of the support substrate  200  opposing each other. 
     Referring to  FIG.  2   , the coil portion  300  may include a first coil pattern  310 , disposed on one surface of the support substrate  200 , and a second coil pattern  320  disposed on the other surface of the support substrate  200  to be spaced apart from the first coil pattern  310 . 
     The coil portion  300  may include a first lead-output pattern  311 , disposed one surface of the support substrate  200  to be connected to the first coil pattern  310 , and a second lead-out pattern  312  spaced apart from the first lead-out pattern  311  to be connected to the first coil pattern  310 . In addition, the coil portion  300  may include a third lead-out pattern  313 , disposed on the other surface of the support substrate  200  to be connected to the second coil pattern  320 , and a fourth lead-out pattern  314  spaced apart from the third lead-out pattern  313  to be connected to the second coil pattern  320 . 
     The first and second coil patterns  310  and  320  may be electrically connected to each other through a via electrode  120  penetrating through the support substrate  200 . Each of the first coil pattern  310  and the second coil pattern  320  may have a planar spiral shape in which at least one turn is formed around the core portion  110 . For example, the first coil pattern  310  may form at least one turn about an axis of the core portion  110  on the one surface of the support substrate  200 . 
     In this embodiment, the coil portion  300  may include the third lead-out pattern  313  connected to the first lead-out pattern  311  through a first connection via  3101 . In addition, the coil portion  300  may include the fourth lead-out pattern  314  connected to the second lead-out pattern  312  through a second lead-out pattern  312  through a second connection via  3201 . 
     Referring to  FIG.  2   , the first and third coil patterns  311  and  313  and the second and fourth lead-out patterns  312  and  314  may be disposed to correspond to each other around the support substrate  200 . Specifically, the first lead-out pattern  311  disposed on one surface of the supporting substrate  200  may be disposed to correspond to the third lead-out pattern  313  disposed on the other surface of the supporting substrate  200 . The second lead-out pattern  312  disposed on one surface of the supporting substrate  200  may be disposed to correspond to the fourth lead-out pattern  314  disposed on the other surface of the supporting substrate  200 . 
     Referring to  FIG.  2   , the coil portion  300  and the first and second external electrodes  610  and  620  to be described later may be connected to each other through the first to fourth lead-out patterns  311 ,  312 ,  313 , and  314 . The first to fourth lead-out patterns  311 ,  312 ,  313 , and  314  may be electrically connected to the first and second connection vias  3101  and  3201  to function as an input terminal or an output terminal of the coil component  100 . 
     At least one of the coil portion  300  and the via electrode  120  may include at least one conductive layer. 
     For example, when the first coil pattern  310 , the first lead-out pattern  311 , and the via electrode  120  are formed on the one surface of the support substrate  200  by a plating process, each of the first coil pattern  310 , the first lead-out pattern  311 , and the via electrode  120  may include a seed layer, such as an electroless plating layer or the like, and an electroplating layer. In this case, the electroplating layer may have a single-layer structure or a multilayer structure The electroplating layer having a multilayer structure may be formed as a conformal film structure in which one electroplating layer may be covered with the other electroplating layer, and may be only formed in a structure in which the other electroplating layer is laminated on one surface of any one electroplating layer. The seed layer of the first coil pattern  310 , the seed layer of the first lead-out pattern  311 , the seed layer of the via electrode  120  may be integrally formed such that a boundary therebetween is not formed, but the present disclosure is not limited thereto. The electroplating layer of the first coil pattern  310 , the electroplating layer of the first lead-out pattern  311 , and the electroplating layer of the via electrode  120  may be integrally formed such that a boundary therebetween is not formed, but the present disclosure is not limited thereto. 
     Each of the coil portion  300  and the via electrode  120  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 the present disclosure is not limited thereto. 
     The insulating layer  400  applied to this embodiment may include a first insulating layer  410 , a second insulating layer  420 , a third insulating layer  430 , and a marking portion  440 . 
     Referring to  FIG.  2   , the marking portion  440  may be disposed on the fourth surface  105  of the body  100 . 
     The first insulating layer  410  is disposed on the fifth surface  105  of the body  100 , and an opening is formed to expose the marking portion  440 . As will be described later, the marking unit  440  may be formed by simultaneously or sequentially printing the marking portion  440  and the first insulating layer on the fifth surface  105  of the body  100  in a coil bar state. In such a printing process, an opening may be formed in a region of the first insulating layer  410  in which the marking portion  440  is to be formed, and the marking portion  440  may be formed in the opening of the first insulating layer  410 . 
     In this embodiment, a thickness of the marking portion  440  is less than or equal to a thickness of the first insulating layer  410 . Specifically, the thickness of the marking portion  440  may be 10 μm or less. Referring to  FIG.  2   , the thickness of the marking unit  440  corresponds to the thickness of the first insulating layer  410 . The above-described opening may have a thickness be less than or equal to the thickness of the first insulating layer  410 , or may be formed to have a thickness correspond to the thickness of the first insulating layer  410 . As a result, the thickness of the marking portion  440  is substantially the same as the thickness of the above-described opening. 
     A method of measuring the thickness of the marking portion  440  and the thickness of the first insulating layer  410  may be a method of measuring a cut surface (e.g., a cut surface to obtain a cross-section in an X-Z plane shown in  FIG.  2   ) of the body  100  using a micro-microscope, an optical microscope, a scanning electron microscope (SEM), or the like. In this case, a thickness of the body  100 , in which the marking portion  440  and the first insulating layer  410  are not formed, may be measured first. Then, the thickness of the above-mentioned marking portion  440  may be compared with a total thickness of the marking portion  440 , the first insulating layer  410 , and the body  100  to measure the thickness of the marking portion  440  and the thickness of the first insulating layer  410 . 
     In one example, the thickness of the marking portion  440  may means a dimension of the marking portion  440  in the thickness direction Z, and may be one of an average thickness, a maximum thickness, and a thickness measured in a center portion of the marking portion  440  in a cross-section. Similarly, the thickness of the first insulating layer  410  may means a dimension of the first insulating layer  410  in the thickness direction Z, and may be one of an average thickness, a maximum thickness, and a thickness measured in a center portion of the first insulating layer  410  in a cross-section. 
     In one example, the thickness of the marking portion  440  may be determined by defining a predetermined number (e.g., 5) of points to the left and the predetermined number (e.g., 5) of points to the right from a reference center point of the marking portion  440  at equal intervals (or non-equal intervals, alternatively), measuring a thickness of each of the points at equal intervals (or non-equal intervals, alternatively), and obtaining an average value therefrom, based on an image of a cross-section cut in an X-Z plane, scanned by, for example, a scanning electron microscope (SEM). The reference center point may have the same distance, or substantially the same distance in consideration of a measurement error, from opposing edges of the marking portion  440  in the cross-section cut. In this case, the thickness of the marking portion  440  may be an average thickness. The thickness of the first insulating layer  410  may be defined similar to the thickness of the marking portion  440 . 
     Alternatively, the thickness of the marking portion  440  may be determined by defining a predetermined number (e.g., 5) of points to the left and the predetermined number (e.g., 5) of points to the right from a reference center point of the marking portion  440  at equal intervals (or non-equal intervals, alternatively), measuring a thickness of each of the points at equal intervals (or non-equal intervals, alternatively), and obtaining a maximum value therefrom, based on an image of a cross-section cut in an X-Z plane, scanned by, for example, a scanning electron microscope (SEM). In this case, the thickness of the marking portion  440  may be a maximum thickness. The thickness of the first insulating layer  410  may be defined similar to the thickness of the marking portion  440 . 
     In a certain case, a marking part  440  may be formed on an upper surface of the body  100  identify a direction in which the coil component is mounted on amounting board. When a coil component is manufactured using a common screen printing method or the like, the marking portion  440  may have a shape protruding from an entire component. Accordingly, a size of the entire component may be increases by a thickness of a protruding portion of the marking portion  440 . In this embodiment, the first insulating layer  410  and the marking portion  440  are formed on the fifth surface  105  of the body  100  using an inkjet printing method. Specifically, in a coil bar state, the first insulating layer  410  and the marking portion  440  may be simultaneously printed on the fifth surface  105  of the body  100 , or may be divided into regions and the regions may be sequentially printed on the fifth surface  105  of the body  100 . Such inkjet printing may prevent the marking portion  440  from protruding from the entire component. In addition, the above-described simultaneous printing or sequential printing may allow positional accuracy of the marking portion  440  to be more improved than in a printing method according to the related art. In one example, the marking portion  440  may include an insulating material or be made of an insulating material. 
     The marking portion  440  and the first insulating layer  410  have different colors. For example, the marking part  440  and the first insulating layer  410  may have different colors to be distinguished from each other on the fifth surface  105  of the body  100 . In this embodiment, a difference in contrast between the marking portion  440  and the first insulating layer  410  may be identified using a high-resolution camera to recognize a difference in colors therebetween. For example, the color of the marking portion  440  may be white-based, and the color of the first insulating layer  410  may be black-based. The colors thereof are not necessarily limited as long as the marking portion  440  and the first insulating layer  410  may be distinguished from each other. As a result, the marking portion  440  may be formed to have various colors and shapes. 
     The second insulating layer  420  may be formed on the first to fourth surfaces  101 ,  102 ,  103 , and  104  of the body  100 . 
     The second insulating layer  420  is formed after the first insulating layer  410  and the marking portion  440  are formed in a coil bar state and individual chip dicing is then performed. The second insulating layer  420  may be formed using a spray coating method, a dipping method, or the like. The method of forming the second insulating layer  420  is not necessarily limited as long as it can form an insulating material. The second insulating layer  420  may include a polymer-based insulating material such as epoxy, a filler, and the like, and may have a thickness of 10 μm or more and 20 μm or less. A method of measuring the thickness of the second insulating layer  420  may a method of measuring a cut surface (e.g., a cut surface to obtain a cross-section in an X-Z plane shown in  FIG.  2   ) of the body  100  using a micro-microscope, an optical microscope, a scanning electron microscope (SEM), or the like. In this case, a thickness of the body  100 , in which the second insulating layer  420  is not formed, may be measured first. Then, a thickness of the second insulating layer  420  may be measured by comparing the thickness of the above-mentioned body  100  with a total thickness of the second insulating layer  420  and the body  100 . In one example, the measurement of the thickness of the second insulating layer  420  may be performed in a manner similar to the measurement of the thickness of the marking portion  440 , although a reference direction in the measurement of the thickness of the second insulating layer  420  is the length direction X. 
     The third insulating layer  430  is formed in a region of the sixth surface  106  of the body  100 , other than a regions in which the first and second external electrodes  610  and  620  to be described later are disposed on the sixth surface  106  of the body  100 . 
     The third insulating layer  430  is distinguished from the above-described first and second insulating layers  410  and  420 , and is formed to be in contact with the sixth surface  106  of the body  100 . When the third insulating layer  430  is formed on the sixth surface  106  of the body  100 , first and second extension portions  612  and  622  of the first and second external electrodes  610  and  620  may extend upwardly of a lower surface of the third insulating layer  430  from the first and second connecting portions  611  and  621 . The third insulating layer  430  may include a thermoplastic resin such as a polystyrene type resin, a vinyl acetate type resin, a polyester type resin, a polyethylene type resin, a polypropylene type resin, a polyamide type resin, a rubber type resin or an acrylic type resin, a thermosetting resin such as a phenol type resin, an epoxy type resin, a urethane type resin, a melamine type resin or an alkyd type resin, a photoimageable resin, parylene, or the like. The third insulating layer  430  may be formed by laminating an insulating film on the surface of the body  100 , by depositing an insulating material on the surface of the body  100  using a thin film process, or by applying an insulating resin to the surface of the body  100  using a screen printing method. 
     The first and second external electrodes  610  and  620  are connected to the first lead-out pattern  311  and the second lead-out pattern  312 , respectively. Referring to  FIG.  2   , each of the first and second external electrodes  610  and  620  includes first and second connection portions  611  and  621 , connected to the first and second lead-out patterns  311  and  312 , and first and second extension portions  612  and  622  extending to the first and second connection portions  611  and  621  and disposed on the sixth surface  106  of the body  100 . The first and second external electrodes  610  and  620  may be spaced apart from each other. The first external electrode  610  and the second external electrode  620  may be electrically connected by the coil portion  300 , but are spaced apart from each other on the surface of the body  100 . 
     Specifically, the first external electrode  610  may include the first connection portion  611  disposed in a region, in which the first extraction pattern  311  is exposed, to be in contact with and connected to the first lead-out pattern  311  and the first extension portion  612  extending from the first connection portion  611  to the sixth surface  106  of the body  100 . The second external electrode  620  may include the second connection portion  621  disposed in a region, in which the second lead-out pattern  312  is exposed, to be in contact with and connected to the second lead-out pattern  312  and the second extension portion  622  extending from the second connection portion  621  to the sixth surface  106  of the body  100 . 
     Each of the first and second external electrodes  610  and  620  may be formed of a conductive material such as copper (Cu), aluminum (Al), silver (Ag), tin (Sn), gold (Au), nickel (Ni), lead (Pb), chromium (Cr), titanium (Ti), or alloys thereof, but the present disclosure is not limited thereto. Although not illustrated in detail, the first and second external electrodes  610  and  620  may be formed to have a single-layer structure or a multilayer structure. For example, the first external electrode  610  includes a first layer, not illustrated, including copper (Cu), a second layer, not illustrated, disposed on the first layer and including nickel (Ni), and a third layer, not illustrated, disposed on the second layer and including tin (Sn). 
     First Modified Embodiment of First Embodiment 
       FIG.  3    is a view illustrating a coil component according to a first modified embodiment of the first embodiment of the present disclosure and corresponding to the cross-sectional view taken along line I-I′ of  FIG.  1     
     A coil component  1000  according to this modified embodiment further includes a coating layer  450 , as compared with the coil component  1000  according to the first embodiment. Therefore, the description of this modification will focus on only the coating layer  450 , a difference from the first embodiment. Descriptions of the other configurations of this embodiment may be substituted with those of the first embodiment as it is. 
     Referring to  FIG.  3   , the coating layer  450  may be disposed on the marking portion  440 . 
     When the second insulating layer  420  is formed on a plurality of side surfaces of a body  100  using a spray method according to the related art, the second insulating layer  420  may extend to an upper portion of the body  100  to cover the marking portion  440 . In this embodiment, the coating layer  450  may be additionally provided on the marking portion  440  to selectively form the second insulating layer  420  on a portion of the fifth surface of the body  105 , in which the marking portion  440  is not formed, and the first to fourth surfaces  101 ,  102 ,  103 , and  104  of the body. On the other hand, as illustrated in  FIG.  3   , when the coating layer  450  is formed to correspond to a region in which the marking portion  440  is formed, an area occupied by the coating layer  450  in the component may be significantly reduced, and thus, a size of the entire component may be reduced. 
     In this embodiment, colors of the marking portion  440  and the coating layer  450  are different from each other. In addition, a thickness of the coating layer  450  is less than a thickness of the marking portion  440 . A method of measuring the thickness of the coating layer  450  may be a method of measuring a cut surface (e.g., a cut surface to obtain a cross-section in an X-Z plane shown in  FIG.  3   ) of the body  100  using a micro-microscope, an optical microscope, a scanning electron microscope (SEM), or the like. In this case, a thickness of the body  100 , in which the first insulating layer  410 , the marking portion  440 , and the coating layer  450  are not formed, is measured first. Then, the thickness of the above-mentioned body  100 , in which the first insulating layer  410 , the marking portion  440 , and the coating layer  450  are not formed, may be compared with a total thickness of the first insulating layer  410 , the marking portion  440 , the coating layer  450 , and the body  100 . In this case, the thickness of the coating layer  450  may be measured by excluding the thicknesses of the above-mentioned first insulating layer  410  and the above-mentioned marking portion  440 . In one example, the measurement of the thickness of the coating layer  450  may be performed in a manner similar to the measurement of the thickness of the marking portion  440 . 
     The coating layer  450  may include an inorganic filler. Alternatively, the coating layer may not include a raw material having a black color, and thus, may have a transparent color. The coating layer  450  may have a thickness of 2 μm or less and, in detail, 1 μm or less. Since the coating layer  450  has a transparent color and the thickness of the coating layer  450  is significantly less than the thickness of the marking portion  440 , the identification function of the marking portion  440  may be secured even when the coating layer  450  is disposed on the marking portion  440   
     The coating layer  450  includes a polymer-based organic material. As described above, the coating layer  450  may include an inorganic filler or may not include a raw material having a black color. The coating layer  450  may be formed by a thin film vapor deposition method such as molecular vapor deposition (MVD), chemical vapor deposition (CVD), atomic layer deposition (ALD), or sputtering. However, the present disclosure is not limited thereto, and the coating layer  450  may be formed by a thick film method such as a spray method, a dipping method, screen printing, or the like. 
     Second Modified Embodiment of First Embodiment 
       FIG.  4    is a view illustrating a coil component according to a second modified embodiment of the first embodiment of the present disclosure and corresponding to the cross-sectional view taken along line I-I′ of  FIG.  1   . 
     A coil component  1000  according to this modified embodiment includes a coating layer  450  disposed in a different form, as compared with the coil component  1000  according to the first embodiment. Therefore, the description of this modification will focus on only the disposition form of the coating layer  450 , a difference from the first embodiment. Descriptions of the other configurations of this embodiment may be substituted with those of the first embodiment as it is. 
     Referring to  FIG.  4   , the coating layer  450  is formed on a first insulating layer  410  to cover an entire fifth surface  105  of the body  100 . As a result, a second insulating layer  420  may be more selectively formed on first to fourth surfaces  101 ,  102 ,  103 , and  104  of the body  100 . In this modified embodiment, the coating layer  450  may serves to significantly increase selectivity such that the second insulating layer  420  is not formed on the fifth surface  105  of the body  100 , and thus, an identification function of the marking portion  440  may be further improved. 
     Third Modified Embodiment of First Embodiment 
       FIG.  5    is a view illustrating a coil component according to a third modified embodiment of the first embodiment of the present disclosure and corresponding to the cross-sectional view taken along line I-I′ of  FIG.  1   . 
     A coil component  1000  according to this modified embodiment includes a second insulating layer  420  disposed in a different form, as compared with the coil component  1000  according to the first embodiment. Therefore, the description of this modification will focus on only the disposition form of the second insulating layer  420 , a difference from the first embodiment. Descriptions of the other configurations of this embodiment may be substituted with those of the first embodiment as it is. 
     The second insulating layer  420  is disposed to extend upwardly of a first insulating layer  410 , but is not disposed to extend upwardly of a coating layer  450 . 
     In the related art, when the second insulating layer  420  is formed on a plurality of side surfaces of a body  100  using a spray method or the like, the second insulating layer  420  may extend to an upper portion of the body  100  to cover a marking portion  440 . In this modified embodiment, the second insulating layer  420  is not disposed to extend upwardly of the coating layer  450 . Thus, the second insulating layer  420  may be selectively formed in a region of a fifth surface  105  of the body  100  in which the marking portion  440  is not formed. As illustrated in  FIG.  5   , when the second insulating layer  420  is disposed to extend upwardly of a first insulating layer  410 , the coating layer  450  may be formed so as not to protrude from an entire component, and thus, a size of the entire component may be reduced. 
     Second Embodiment 
       FIG.  6    is a schematic diagram of a coil component according to a second embodiment of the present disclosure, and  FIG.  7    is a view of a body of the coil component in  FIG.  6   , when viewed from below. 
     A coil component  2000  according to this modified embodiment further includes a recess R and a filling portion  500  (shown in  FIG.  8   ), as compared with the coil component  1000  according to the first embodiment. Therefore, the description of this modification will focus on only the recess R and the filling portion  500 , a difference from the first embodiment. Descriptions of the other configurations of this embodiment may be substituted with those of the first embodiment as it is. 
     The recess R is formed to surround first to fourth surfaces  101 ,  102 ,  103 , and  104  of a body  100  on a side of a sixth surface  106  of the body  100 . For example, the recesses R is formed along an entire corner region formed by each of the first to fourth surfaces  101 ,  102 ,  103 , and  104  of the body  100  and the sixth surface  106  of the body  100 . The recess R does not extend to the fifth surface  105  of the body  100 . For example, the recess R does not penetrate through the body  100  in a thickness direction Z of the body  100 . 
     The recess R may be formed by performing pre-dicing on a boundary line (a dicing line or a singulation line) between each body  100  on a side of one surface of a coil bar. A width of a pre-dicing tip, used in the pre-dicing, is larger than a width of a dicing line of the coil bar. The term “coil bar” refers to a state in which a plurality of bodies  100  are connected to each other in length and width directions of the body  100 . In addition, the term “width of dicing line” refers to a width of a full-dicing tip of full dicing for individualizing the coil bar. 
     A depth at the time of such pre-dicing is adjusted such that a portion of each of the first and second lead-out patterns  311  and  312  may be removed together with a portion of the body  100 . For example, the depth is adjusted such that the first and second lead-out patterns  311  and  312  are exposed to an internal surface of the recess R. However, a depth at the time of free dicing is adjusted so as not to penetrate through one surface and the other surface of the coil bar. Accordingly, even after pre-dicing, the coil bar is maintained in a state in which a plurality of bodies are connected to each other. 
     An internal wall of the recess R, an internal surface of the recess R, and a lower surface of the recess R constitute a surface of the body  100 . However, for ease of the description, the internal wall of the recess R and the lower surface of the recess R will be distinguished from the surface of the body  100 . 
     Each of the first and second lead-out patterns  311  and  312  is exposed to an internal surface of the recess R. In a process of forming the recess R, a portion of each of the first and second lead-out patterns  311  and  312  is also removed together with a portion of the body  100 . For example, the recess R extends to the respective first and second lead-out patterns  311  and  312 . Accordingly, first and second external electrodes  610  and  620  to be described later may be formed on the first and second lead-out patterns  311  and  312 , exposed to the internal surface of the recess R, to connect a coil portion  300  and the first and second external electrodes  610  and  620  to each other. 
     In  FIG.  8   , the recess R is illustrated as penetrating through a lower portion of each of the first and second lead-out patterns  311  and  312 , so that the first and second lead-out patterns  311  and  312  are exposed to an internal wall and a lower surface of the recess R. However, this is just an example. That is, as a non-limiting example, the depth at the time of pre-dicing may be adjusted to expose the first and second lead-out patterns  311  and  312  to the internal wall of the recess R, so that the recess R may be formed to penetrate through upper and lower portions of each of the first and second lead-out patterns  311  and  312 . In addition, the recess R may be formed to have a depth at which the first lead-out pattern  311  is penetrated but the second lead-out pattern  312  is not penetrated. In this case, the first lead-out pattern  311  may be exposed to the internal wall of the recess R, and the second lead-out pattern  312  may be exposed to both the lower surface and the internal wall of the recess R. In addition, as another non-limiting example, the depth of the recess R formed on aside of the first surface  101  of the body  100  and the depth of the recess R formed on a side of the second surface  102  of the body  100  may be different from each other. 
     One surface of each of the first and second lead-out patterns  311  and  312 , exposed to the internal surface of the recess R, may have higher surface roughness than the other surfaces of each of the first and second lead-out patterns  311  and  312 . For example, when the first and second lead-out patterns  311  and  312  are formed by plating and the recess R is formed by the above-described pre-dicing, a portion of the first and second lead-out patterns  311  and  312  may be removed by a free dicing tip. Accordingly, one surface of each of the first and second lead-out patterns  311  and  312 , exposed to the internal surface of the recess R, may be formed to have higher surface roughness than the other surfaces of the first and second lead-out patterns  311  and  312  due to polishing using a pre-dicing tip. As will be describe later, each of the first and second external electrodes  610  and  620  may be formed as a thin film, so that bonding force to the body  100  is poor. Since the first and second external electrodes  610  and  620  is in contact with and connected to one surface of each of the first and second lead-out patterns  311  and  312  having relatively high surface roughness, bonding force between the first and second external electrodes  610  and  620  and the first and second lead-out patterns  311  and  312  may be improved. 
     The first and second external electrodes  610  and  620  may include first and second connection portions  611  and  621 , disposed in the recess R to be connected to the first and second lead-out patterns  311  and  312 , and first and second extension portions  611  and  621  extending to the first and second connection portions  611  and  621  and disposed on the sixth surface  106  of the body  100 , respectively. The first and second external electrodes  610  and  620  may be spaced apart from each other. The first external electrode  610  and the second external electrode  620  may be electrically connected by the coil portion  300 , but may be disposed on the surfaces of the body  100  and the recess R to be spaced apart from each other. 
     Specifically, the first external electrode  610  may include the first connection portion  611  disposed in a region, in which the first lead-out pattern  311  is exposed, of the internal surface of the recess R to be in contact with and connected to the first lead-out pattern  311  and the first extension portion  611  extending from the first connection portion  611  to the sixth surface  106  of the body  100 . The second external electrode  620  may include the second connection portion  621  disposed in a region, in which the second lead-out pattern  312  is exposed, of the internal surface of the recess R to be in contact with and connected to the second lead-out pattern  312  and the second extension portion  622  extending from the second connection portion  621  to the sixth surface  106  of the body  100 . Each of the first and second external electrodes  610  and  620  may be formed along the internal surface of the recess R and the sixth surface  106  of the body  100 . For example, each of the first and second external electrodes  610  and  620  may be provided in the form of a conformal film. 
     Each of the first and second external electrodes  610  and  620  may be integrally formed on the sixth surface  106  of the body  100 . For example, the first connection portion  611  and the first extension portion  612  of the first external electrode  610  may be formed together in the same process to be integrated with each other, and the second connection portion  621  and the second extension  622  of the second external electrode  620  may be formed together in the same process to be integrated with each other. The first and second external electrodes  610  and  620  may be formed by a thin film process such as a sputtering process. 
     The filling portion  500  fills the recess R and covers the connecting portions  611  and  621 . For example, in the case of the present disclosure, the connection portions  611  and  621  of the first and second external electrodes  610  and  620  may be disposed between the filling portion  500  and the internal surface of the recess R. 
     One surface of the filling portion  500  may be disposed on substantially the same plane as each of the first and second surfaces  101  and  102  of the body  100  and the third and fourth surfaces  103  and  104  of the body  100 . For example, by performing full-dicing after forming the first and second external electrodes  610  and  620  in a coil bar state and filling a space between the connection portions  611  and  621  of an adjacent body  100  with a material for forming a filling portion, one surface of the filling portion  500  may be disposed on substantially the same plane as each of the first to fourth surfaces  101 ,  102 ,  103 , and  104  of the body  100 . 
     The filling portion  500  may include an insulating resin. The insulating resin may include an epoxy, a polyimide, a liquid crystal polymer, or the like, in a single form or in combined forms, but the present disclosure is not limited thereto. 
     The filling portion  500  may further include magnetic powder particles dispersed in an insulating resin. The magnetic powder particle may be, for example, a ferrite powder particle or a magnetic metal powder particle. 
     Examples of the ferrite powder particle may include at least one of spinel type ferrites such as Mg—Zn-based ferrite, Mn—Zn-based ferrite, Mn—Mg-based ferrite, Cu—Zn-based ferrite, Mg—Mn—Sr-based ferrite, Ni—Zn-based ferrite, and the like, hexagonal ferrites such as Ba—Zn-based ferrite, Ba—Mg-based ferrite, Ba—Ni-based ferrite, Ba—Co-based ferrite, Ba—Ni—Co-based ferrite, and the like, garnet type ferrites such as Y-based ferrite, and the like, and Li-based ferrites. 
     The magnetic metal powder particle 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 particle may be at least one or more of a pure iron powder, a Fe—Si-based alloy powder, a Fe—Si—Al-based alloy powder, a Fe—Ni-based alloy powder, a Fe—Ni—Mo-based alloy powder, a Fe—Ni—Mo—Cu-based alloy powder, a Fe—Co-based alloy powder, a Fe—Ni—Co-based alloy powder, a Fe—Cr-based alloy powder, a Fe—Cr—Si-based alloy powder, a Fe—Si—Cu—Nb-based alloy powder, a Fe—Ni—Cr-based alloy powder, and a Fe—Cr—Al-based alloy powder. 
     The metallic magnetic powder particle may be amorphous or crystalline. For example, the magnetic metal powder particle may be a Fe—Si—B—Cr-based amorphous alloy powder particle, but the present disclosure is not limited thereto. 
     Each of the ferrite powder particle and the magnetic metal powder particle may have an average of about 0.1 μm to about 30 μm, but the present disclosure is not limited thereto 
     First Modified Embodiment of Second Embodiment 
       FIG.  9    is a view illustrating a coil component according to a first modified embodiment of the second embodiment of the present disclosure and corresponding to the cross-sectional view taken along line II-II′ of  FIG.  6   . 
     A coil component  2000  according to this modified embodiment further includes a coating layer  450 , as compared with the coil component  2000  according to the second embodiment. Therefore, the description of this modification will focus on only coating layer  450 , a difference from the second embodiment. Descriptions of the other configurations of this embodiment may be substituted with those of the first embodiment as it is. 
     Referring to  FIG.  9   , the coating layer  450  is disposed on a marking portion  440 . 
     When a second insulating layer  420  is formed on a plurality of side surfaces of a body  100  according to the related art, the second insulating layer  420  may extend to an upper portion of the body  100  to cover a marking portion  440 . In this embodiment, the coating layer  450  may be additionally disposed on the marking portion  440  to selectively form a second insulating layer  420  on a portion of a fifth surface  105  of the body  100 , in which the marking portion  440  is not formed, and first to fourth surface  101 ,  102 ,  103 , and  104  of the body  100 . As illustrated in  FIG.  9   , when the coating layer  450  is formed to correspond to a region in which the marking part  440  is formed, an area occupied by the coating layer  450  in the component may be significantly reduced, and thus, a size of the entire component may be reduced. 
     Second Modified Embodiment of Second Embodiment 
       FIG.  10    is a view illustrating a coil component according to a second modified embodiment of the second embodiment of the present disclosure and corresponding to the cross-sectional view taken along line II-II′ of  FIG.  6   . 
     A coil component  2000  according to this modified embodiment includes a coating layer  450  disposed in a different form, as compared with the coil component  2000  according to the second embodiment. Therefore, the description of this modification will focus on only the disposition form of the coating layer  450 , a difference from the second embodiment. Descriptions of the other configurations of this embodiment may be substituted with those of the first embodiment as it is. 
     The collating layer  450  is disposed to expose upwardly of the first insulating layer  410 . 
     Referring to  FIG.  10   , the coating layer  450  is formed on a first insulating layer  410  to cover an entire fifth surface  105  of the body  100 . As a result, a second insulating layer  420  may be more selectively formed on first to fourth surfaces  101 ,  102 ,  103 , and  104  of the body  100 . In this modified embodiment, the coating layer  450  may serves to significantly increase selectivity such that the second insulating layer  420  is not formed on the fifth surface  105  of the body  100 , and thus, an identification function of the marking portion  440  may be further improved. 
     Third Modified Embodiment of Second Embodiment 
       FIG.  11    is a view illustrating a coil component according to a third modified embodiment of the second embodiment of the present disclosure and corresponding to the cross-sectional view taken along line II-II′ of  FIG.  6   . 
     A coil component  2000  according to this modified embodiment includes a second insulating layer  420  disposed in a different form, as compared with the coil component  2000  according to the second embodiment. Therefore, the description of this modification will focus on only the disposition form of the second insulating layer  420 , a difference from the second embodiment. Descriptions of the other configurations of this embodiment may be substituted with those of the first embodiment as it is. 
     The second insulating layer  420  is disposed to extend upwardly of a first insulating layer  410 , but is not disposed to extend upwardly of a coating layer  450 . 
     In the related art, when the second insulating layer  420  is formed on a plurality of side surfaces of a body  100  using a spray method or the like, the second insulating layer  420  may extend to an upper portion of the body  100  to cover a marking portion  440 . In this modified embodiment, the second insulating layer  420  is not disposed to extend upwardly of the coating layer  450 . Thus, the second insulating layer  420  may be selectively formed in a region of a fifth surface  105  of the body  100  in which the marking portion  440  is not formed. As illustrated in  FIG.  11   , when the second insulating layer  420  is disposed to extend upwardly of a first insulating layer  410 , the coating layer  450  may be formed so as not to protrude from an entire component, and thus, a size of the entire component may be reduced. 
     As described above, the present disclosure relates to a coil component including a support substrate, a coil portion disposed on at least one surface of the support substrate, a body, in which the support substrate and the coil portion are disposed, having one surface and the other surface opposing each other, a first external electrode and a second external electrode disposed on the other surface of the body to be spaced apart from each other and connected to the coil portion, a marking portion disposed on the one surface of the body, and a first insulating layer disposed on the one surface of the body and provided with an opening formed to expose the marking portion. The marking portion has a thickness less than or equal to a thickness of the marking portion. 
     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.