Patent Publication Number: US-11646150-B2

Title: Coil electronic component

Description:
CROSS-REFERENCE TO RELATED APPLICATION(S) 
     This application claims benefit of priority to Korean Patent Application No. 10-2019-0043220 filed on Apr. 12, 2019 in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference in its entirety. 
     TECHNICAL FIELD 
     The present disclosure relates to a coil electronic component. 
     BACKGROUND 
     An inductor, one type of coil component, is a passive electronic component used in electronic devices along with a resistor and a capacitor. 
     When a coil component is mounted on a substrate, mutual inductance with other coil components may occur, and overall inductance may increase or decrease due to mutual inductance. Accordingly, it has been required to mark a direction of rotation of an internal coil in a coil component. 
     As electronic devices have been designed to have high performance and reduced sizes, an increased number of coil components have been used in electronic devices and sizes of coil components have been reduced. Accordingly, it has been necessary to provide an electronic component in which a direction of rotation of a coil may easily be identified in a direction of an upper surface of a coil component without increasing the number of processes. 
     SUMMARY 
     An aspect of the present disclosure is to provide an electronic component having a reduced size in which a direction of rotation of a coil may be easily identified in a direction of an upper surface of a coil electronic component without increasing a number of processes. 
     According to an aspect of the present disclosure, a coil electronic component includes a body having a first surface and a second surface opposing each other, and a third surface and a fourth surface connecting the first surface and the second surface to each other and opposing each other, an insulating substrate disposed in the body and including an end portion having one side surface exposed externally of the body, first and second coil portions disposed on one surface and the other surface of the insulating substrate opposing each other, respectively, a first lead-out portion connected to the first coil portion, disposed on one surface of the insulating substrate, and exposed from the body, a second lead-out portion connected to the first coil portion, disposed on the other surface of the insulating substrate, and exposed from the body, and a direction indicator disposed on at least one of one surface and the other surface of the end portion opposing each other. 
     According to an aspect of the present disclosure, a coil electronic component includes a body having a first surface and a second surface opposing each other, and a third surface and a fourth surface connecting the first surface and the second surface to each other and opposing each other; an insulating substrate disposed in the body; first and second coil portions disposed on one surface and the other surface of the insulating substrate opposing each other, respectively; a first lead-out portion connected to the first coil portion, disposed on the one surface of the insulating substrate, and exposed from the body; a second lead-out portion connected to the second coil portion, disposed on the other surface of the insulating substrate, and exposed from the body; a direction indicator disposed in the body and having one side surface exposed externally of the body; and an insulating film disposed between the direction indicator and the body. 
     According to an aspect of the present disclosure, a coil electronic component includes a body; an insulating substrate disposed in the body; an internal coil portion disposed on at least one of one surface and the other surface of the insulating substrate opposing each other; and a direction indicator including a first conductor layer and a second conductor layer disposed on the first conductor layer, and disposed in the body and having one side surface exposed externally of the body. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
       The above and other aspects, features, and advantages of the present disclosure will be more clearly understood from the following detailed description, taken in conjunction with the accompanying drawings, in which: 
         FIG.  1    is a perspective diagram illustrating a coil electronic component according to an example embodiment of the present disclosure; 
         FIG.  2    is a cross-sectional diagram illustrating a body of a coil electronic component illustrated in  FIG.  1    viewed from a fifth surface of the body according to an example embodiment of the present disclosure; 
         FIG.  3    is a diagram illustrating a cross-sectional diagram taken along line V-V′ in  FIG.  2   ; 
         FIG.  4    is a diagram illustrating a modified example of an example illustrated in  FIG.  3   ; 
         FIGS.  5 A- 5 F  are diagrams illustrating processes of manufacturing a coil electronic component in order according to an example embodiment of the present disclosure; 
         FIG.  6    is a perspective diagram illustrating a coil electronic component according to another modified example of the present disclosure; 
         FIG.  7    is a perspective diagram illustrating a coil electronic component according to another modified example of the present disclosure; and 
         FIG.  8    is a diagram illustrating a body of a coil electronic component illustrated in  FIG.  7    viewed from a fifth surface of the body. 
     
    
    
     DETAILED DESCRIPTION 
     Hereinafter, embodiments of the present disclosure will be described as follows with reference to the attached drawings. 
     The terms used in the following description are provided to explain a specific exemplary embodiment and are not intended to be limiting. A singular term includes a plural form unless otherwise indicated. The terms, “include,” “comprise,” “is configured to,” etc. of the description are used to indicate the presence of features, numbers, steps, operations, elements, parts or combination thereof, and do not exclude the possibilities of combination or addition of one or more features, numbers, steps, operations, elements, parts or combination thereof. Also, the terms “disposed on,” “positioned on,” “mounted on,” and the like, may indicate that an element may be disposed on or below another element, and do not necessarily indicate that an element is only disposed in an upper portion with reference to a gravitational direction. 
     It will be understood that when an element is “coupled with/to” or “connected with” another element, the element may be directly coupled with/to another element, and there may be an intervening element between the element and another element. 
     Sizes and thicknesses of elements illustrated in the drawings are merely examples to help understanding of technical matters of the present disclosure. 
     In the drawings, an X direction is a first direction or a length direction, a Y direction is a second direction or a width direction, a Z direction is a third direction or a thickness direction. 
     In the drawings, same elements will be indicated by same reference numerals. Also, redundant descriptions and detailed descriptions of known functions and elements that may unnecessarily make the gist of the present invention obscure will not be provided. 
     In electronic devices, various types of electronic components may be used, and various types of coil components may be used between the electronic components to remove noise, and other purposes. 
     In an electronic device, a coil component may be used as a power inductor, an HF inductor, a general bead, a GHz bead, a common mode filter, and the like. 
     In the description below, an example embodiment in which a coil electronic component  10  is implemented as a thin film inductor used in a power line of a power supply circuit will be described. The coil component in example embodiments may also be implemented as a chip bead, a chip filter, and the like, other than a thin film inductor. 
     Example Embodiment 
       FIG.  1    is a perspective diagram illustrating a coil electronic component according to an example embodiment.  FIG.  2    is a cross-sectional diagram illustrating a body of a coil electronic component illustrated in  FIG.  1    viewed from a fifth surface of the body according to an example embodiment.  FIG.  3    is a diagram illustrating a cross-sectional diagram taken along line V-V′ in  FIG.  2   .  FIG.  4    is a diagram illustrating a modified example of an example illustrated in  FIG.  3   .  FIGS.  5 A- 5 F  are diagrams illustrating processes of manufacturing a coil electronic component according to an example embodiment.  FIG.  6    is a perspective diagram illustrating a coil electronic component according to another modified example. 
     Referring to  FIGS.  1  to  6   , a coil electronic component  10  may include a body  50 , an insulating substrate  25 , coil portions  42  and  44 , lead-out portions  62  and  64 , and a direction indicator  951 , and may further include first and second connection patterns  111  and  112 , an insulating film  30 , connection conductors  31  and  32 , dummy lead-out portions  63  and  65 , and external electrodes  851  and  852 . 
     The body  50  may form an exterior of the coil electronic component  10 , and may include the insulating substrate  25  disposed therein. 
     The body  50  may have a hexahedral shape. 
     The body  50  may include a first surface  101  and a second surface  102  opposing each other in a length direction (X), a third surface  103  and a fourth surface  104  opposing each other in a thickness direction (Z) , and a fifth surface  105  and a sixth surface  106  opposing each other in a width direction (Y). The third surface  103  and the fourth surface  104  may connect the first surface  101  and the second surface  102  of the body  50  opposing each other. 
     The body  50  may be configured such that the coil electronic component  10  including the external electrodes  851  and  852  disposed therein may have a length of 0.2±0.1 mm, a width of 0.25±0.1 mm, and a thickness of 0.4 mm, but an example embodiment thereof is not limited thereto. 
     The body  50  may include a magnetic material and an insulating resin. For example, the body  50  may be formed by layering one or more magnetic material sheets including an insulating resin and a magnetic material dispersed in the insulating resin. The body  50  may also have a structure different from the structure in which a magnetic material is disposed in an insulating resin. For example, the body  50  may be formed of a magnetic material such as ferrite. 
     The magnetic material may be ferrite power or magnetic metal power. 
     The ferrite power may be one or more of spinel ferrite such as Mg—Zn based ferrite, Mn—Zn based ferrite, Mn—Mg based ferrite, Cu—Zn based ferrite, Mg—Mn—Sr based ferrite, Ni—Zn based ferrite, and the like, hexagonal ferrite such as Ba—Zn based ferrite, Ba—Mg based ferrite, Ba—Ni based ferrite, Ba—Co based ferrite, Ba—Ni—Co based ferrite, and the like, garnet ferrite such as Y based ferrite, and Li based ferrite, for example. 
     The magnetic metal power may include at least one of iron (Fe) , silicon (Si) , chromium (Cr) , cobalt (Co) , molybdenum (Mo) , aluminum (Al), niobium (Nb), copper (Cu), and nickel (Ni) or alloys thereof. For example, the magnetic metal power may be at least one or more of pure iron powder, Fe—Si based alloy power, Fe—Si—Al based alloy power, Fe—Ni based alloy power, Fe—Ni—Mo based alloy power, Fe—Ni—Mo—Cu based alloy power, Fe—Co based alloy power, Fe—Ni—Co based alloy power, Fe—Cr based alloy power, Fe—Cr—Si based alloy power, Fe—Si—Cu—Nb based alloy power, Fe—Ni—Cr based alloy power, and Fe—Cr—Al based alloy power. 
     The magnetic metal power may be amorphous or crystalline. For example, the magnetic metal power may be Fe—Si—B—Cr based amorphous alloy power, but an example embodiment thereof is not limited thereto. 
     An average diameter of each of the ferrite power and the magnetic metal power may be 0.1 μm to 30 μm, but an example embodiment thereof is not limited thereto. 
     The body  50  may include two or more different types of magnetic materials disposed in an insulating resin. The technical concept that different types of magnetic materials may be included indicates that the magnetic materials may be distinguished from each other by one of an average diameter, a composition, crystallinity, and shape. 
     The insulating resin may include one of epoxy, polyimide, a liquid crystal polymer, and the like, or combinations thereof, but an example embodiment thereof is not limited thereto. 
     The insulating substrate  25  may be disposed in the body  50 , and the coil portions  42  and  44  may be disposed on one surface and the other surface of the insulating substrate  25  opposing each other. The insulating substrate  25  may be disposed in the body  50  and may include an end portion  24  having one side surface exposed externally of the body  50 , and the direction indicator  951  may be disposed on at least one of one surface and the other surface of the end portion  24  opposing each other. The insulating substrate  25  may further include a support portion  23  disposed between the coil portions  42  and  44  and supporting the coil portions  42  and  44 , and a connection portion  231  disposed between the first and second connection patterns  111  and  112 . 
     In an example embodiment, a region other than the end portion  24  may be removed by CO 2  laser, or the like, in a process of trimming the insulating substrate  25  after a process of plating the coil portions  42  and  44 . By the trimming process, one portion of the insulating substrate  25  disposed in the body  50  may be removed, and one portion of the insulating substrate  25  exposed to one side surface of the body  50 , the end portion  24 , may be exposed during a subsequent dicing process. 
     The insulating substrate  25  may be formed of a thermosetting insulating resin such as an epoxy resin, a thermoplastic insulating resin such as a polyimide resin, or an insulating material including a photosensitive insulating resin, or may be formed of an insulating material in which a reinforcement such as glass fiber or an inorganic filler is impregnated in the above-mentioned insulating materials. For example, the insulating substrate  25  may be formed of an insulating material such as prepreg, ajinomoto build-up film (ABF), FR-4, bismaleimide triazine (BT), a photoimageable dielectric (PID), or the like, but an example of the material may not be limited thereto. 
     As the inorganic filler, at least one or more elements selected from among a group consisting of silica (SiO 2 ), aluminum oxide (Al 2 O 3 ), silicon carbide (SiC), barium sulfate (BaSO 4 ), talc, mud, mica power, 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 (BaTiO3), and calcium zirconate (CaZrO 3 ) may be used. 
     When the insulating substrate  25  is formed of an insulating material including reinforcement, the insulating substrate  25  may provide improved stiffness. When the insulating substrate  25  is formed of an insulating material which does not include glass fiber, thicknesses of the coil portions  42  and  44  may easily be reduced. 
     The coil portions  42  and  44  may be disposed on both surfaces of the insulating substrate  25  opposing each other, and may implement properties of the coil electronic component. For example, when the coil electronic component  10  is used as a power inductor, the coil portions  42  and  44  may maintain an output voltage by storing electric fields as magnetic fields, thereby stabilizing power of an electronic device. 
     In an example embodiment, the coil portions  42  and  44  may be configured to be disposed perpendicularly to the third surface  103  of the fourth surface  104  of the body  50 . 
     The notion that the coil portions  42  and  44  may be disposed perpendicularly to the third surface  103  or the fourth surface  104  of the body  50  may indicate that, as illustrated in  FIG.  1   , surfaces of the coil portions  42  and  44  in contact with the insulating substrate  25  may be disposed perpendicularly or almost perpendicularly to the third surface  103  or the fourth surface  104  of the body  50 . For example, the surfaces of the coil portions  42  and  44  in contact with the insulating substrate  25  may form an angle of 80 to 100° with the third surface  103  or the fourth surface  104  of the body  50 . 
     The coil portions  42  and  44  may be configured to be disposed in parallel to the fifth surface  105  and the sixth surface  106  of the body  50 . Thus, surfaces of the coil portions  42  and  44  in contact with the insulating substrate  25  may be in parallel to the fifth surface  105  and the sixth surface  106  of the body  50 . 
     As the body  50  may have a 1608 size or 1006 or less, a thickness of the body  50  may be greater than a width, and a cross-sectional surface of the body  50  taken in an XZ direction may be greater than a cross-sectional surface of the body  50  taken in an XY direction. Accordingly, as the coil portions  42  and  44  maybe disposed perpendicularly to the third surface  103  or the fourth surface  104  of the body  50 , an area in which the coil portions  42  and  44  may be disposed may increase. 
     For example, when a length of the body  50  is 1.6±0.2 mm and a width is 0.8±0.05 mm, a thickness of the body  50  may satisfy a range of 1.0±0.05 mm (1608 size). When a length of the body  50  is 0.2±0.1 and a width is 0.25±0.1 mm, a thickness of the body  50  may satisfy a maximum of 0.4 mm or less (1006 size). As the thickness is greater than the width, the coil portions  42  and  44  may secure a greater area when the coil portions  42  and  44  are disposed perpendicularly to the third surface  103  or the fourth surface  104  of the body  50 , as compared to the example in which the coil portions  42  and  44  are disposed horizontally to the third surface  103  or the fourth surface  104  of the body  50 . The greater the area of the coil portions  42  and  44 , the more the inductance (L) and quality factor (Q) may improve. 
     In an example embodiment, the coil portions  42  and  44  may include at least one or more coil layers  501  and  502 . For example, the first coil portion  42  may include a first coil layer  501  in contact with one surface of the insulating substrate  25 , and a second coil layer  502  disposed on the first coil layer  501 . The second coil portion  44  may include a first coil layer  501  in contact with the other surface of the insulating substrate  25 , and a second coil layer  502  disposed on the first coil layer  501 . The first and second coil layers  501  and  502  may have shapes growing in a width direction and a height direction, and may be formed by an isotropic plating process or an anisotropic plating process, but an example embodiment thereof is not limited thereto. 
     The coil portions  42  and  44  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, and the first and second coil layers  501  and  502  may be formed of the same metal, but an example embodiment thereof is not limited thereto. The direction indicator  951  disposed on the coil portions  62  and  64  and the fourth surface  104  of the body  50  may be formed together by the same plating process, and may include the same metal. 
     The first coil portion  42  disposed on one surface of the insulating substrate  25  may oppose the second coil portion  44  disposed on the other surface of the insulating substrate  25 , and the first coil portion  42  and the second coil portion  44  may be electrically connected to each other through a via electrode  46  disposed in the insulating substrate  25 . Thus, the support portion  23  may be disposed between the coil portions  42  and  44 , and may support the coil portions  42  and  44  and may secure stiffness. In an example embodiment, the connection portion  231  may be further disposed between the first and second connection patterns  111  and  112 . As the connection portion  231  is disposed between the first and second connection patterns  111  and  112 , the connection portion  231  may support the connection patterns  111  and  112  and may secure stiffness. 
     In an example embodiment, a region other than the support portion  23 , the connection portion  231 , and the end portion  24  may be removed by CO 2  laser in a process of trimming the insulating substrate  25  after a process of plating the coil portions  42  and  44 . By the trimming process, one portion of the insulating substrate  25  may be removed, and a volume occupied by a magnetic material in the body  50  may increase by the volume corresponding to the removed portion of the insulating substrate  25 , thereby improving inductance properties of the coil electronic component  10  in the example embodiment. 
     Each of the first coil portion  42  and the second coil portion  44  may have a planar spiral form forming at least one turn with reference to a core portion  71  as a shaft. As an example, the first coil portion  42  may form at least one turn on one surface of the insulating substrate  25  with reference to the core portion  71  as a shaft. 
     The via electrode  46  may be formed of a material including a metal having high electrical conductivity, and may be formed of silver (Ag) , palladium (Pd) , aluminum (Al) , nickel (Ni) , titanium (Ti) , gold (Au) , copper (Cu) , platinum (Pt) , or alloys thereof, for example, but an example of the material may not be limited thereto. 
     The lead-out portions  62  and  64  may be exposed to the first surface  101  and the second surface  102  of the body  50 . For example, the first lead-out portion  62  may be exposed to the first surface  101  and the third surface  103  of the body  50 , and the second lead-out portion  64  may be exposed to the second surface  102  and the third surface  103  of the body  50 . 
     Referring to  FIG.  1   , one end of the first coil portion  42  may extend from one surface of the insulating substrate  25  and may form the first lead-out portion  62 , and the first lead-out portion  62  may be exposed to the first surface  101  and the third surface  103 . Also, one end of the second coil portion  44  may extend from the other surface of the insulating substrate  25  and may form the second lead-out portion  64 , and the second lead-out portion  64  may be exposed to the second surface  102  and the third surface  103  of the body  50 . 
     Referring to  FIGS.  1  to  6   , the external electrodes  851  and  852  and the coil portions  42  and  44  may be connected to each other through the lead-out portions  62  and  64  disposed in the body  50 , respectively. 
     The lead-out portions  62  and  64  may be disposed in the body and may have an “L” shaped form. An area in which the lead-out portions  62  and  64  of the example embodiment are disposed may be narrower than a width of the body  50 . The lead-out portions  62  and  64  may extend from the first surface  101  and the second surface  102  of the body  50  and may be lead out to the third surface  103 , respectively, and the lead-out portions  62  and  64  may not be disposed on the fourth surface  104 , the fifth surface  105 , and the sixth surface  106  of the body  50 . 
     The lead-out portions  62  and  64  may include a conductive metal such as copper (Cu), and may be formed together with the coil portions  42  and  44  while the coil portions  42  and  44  are plated. As the lead-out portions  62  and  64  consecutively formed on the first to third surfaces  101 ,  102 , and  103  of the body  50  are formed in the body  50 , a contact area between the lead-out portions  62  and  64  and the external electrodes  851  and  852  may increase as compared to a general lower electrode structure, and accordingly, a size of the coil electronic component may decrease, and high capacity may be implemented. 
     The direction indicator  951  may be disposed on at least one of one surface and the other surface of the end portion  24  opposing each other. In an example embodiment, the direction indicator  951  may be disposed on both surfaces of the end portion  24  and may be configured to be connected to the first coil portion  42  and the second coil portion  44 . According to a modified example, the direction indicator  951  may include a first direction indicating pattern  91  or a second direction indicating pattern  92  on one surface or the other surface of the end portion  24  . Referring to  FIG.  6   , as an example, the second direction indicating pattern  92  may be disposed on the other surface of the end portion  24 , but an example embodiment thereof is not limited thereto. The first direction indicating pattern  91  may also be disposed on one surface of the end portion  24 . 
     When the coil electronic component  10  of an example embodiment is mounted on a circuit substrate, mutual inductance may occur between the coil electronic component  10  and other adjacent elements, and accordingly, overall inductance may increase or may decrease. Also, when a mounting direction is reversed, a direction of magnetic flux generated when current flows in the coil portions  42  and  44  may also be reversed. In this case, as an effect affecting the other coil electronic components may change, the direction indicator  951  may be disposed to identify a direction of rotation of an internal coil. Thus, the coil electronic component  10  in the example embodiment may easily identify a mounting direction and a magnetic flux direction by the direction indicator  951  disposed on the fourth surface  104  of the body  50 . Further, surfaces of the body  50  on which the external electrodes  851  and  852  are supposed to be disposed may be easily identified by the direction indicator  951 . 
     In an example embodiment, the coil portions  42  and  44  and the direction indicator  951  may be formed through the same process. A plating resist  81  for forming the coil portions  42  and  44 , the lead-out portions  62  and  64 , and the direction indicator  951  may be integrally formed such that the direction indicator  951  may be plated while the coil portions  42  and  44  are plated. Thus, a direction indicator may be disposed in a coil electronic component having a reduced size without increasing the number of processes as compared to an example in which a direction indicator is separately printed or is etched by irradiating laser on an upper surface or a side surface of the coil electronic component. 
     Referring to  FIG.  3   , at least one of the coil portions  42  and  44  and the direction indicator  951  may include at least one or more conductive layer. Referring to  FIG.  4   , the coil portions  42  and  44  may include a first coil layer  501  in contact with the insulating substrate  25  and a second coil layer  502  disposed on the first coil layer  501 , and the direction indicator  951  may include a first conductor layer  51  and a second conductor layer  52  disposed on the first conductor layer  51 . 
     As an example, when the coil portions  42  and  44  and the direction indicator  951  are formed on both surfaces of the insulating substrate  25  by a plating process, each of the coil portions  42  and  44  and the direction indicator  951  may include a seed layer  61 , an electroless plating layer, and the first and second coil layers  501  and  502  and the first and second conductor layers  51  and  52 , electroplating layers. The electroplating layer may have a single layer structure, or may have a multilayer structure. The electroplating layer having a multilayer structure may be formed in a conformal film structure in which one electroplating layers covers the other electroplating layer, or may be formed in a form in which one electroplating layer is layered only on one surface of the other electroplating layer. The seed layers  61  of the coil portions  42  and  44  and the seed layer  61  of the direction indicator  951  may be integrated with each other such that a boundary may not be formed therebetween, but an example embodiment thereof is not limited thereto. The electroplating layers of the coil portions  42  and  44  and the electroplating layer of the direction indicator  951  may be integrated with each other such that a boundary may not be formed therebetween, but an example embodiment thereof is not limited thereto. 
     Each of the coil portions  42  and  44  and the direction indicator  951  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. The first conductor layer  51  and the first coil layer  501  may include the same metal, and the second conductor layer  52  and the second coil layer  502  may include the same metal, but an example embodiment thereof is not limited thereto. 
     The connection patterns  111  and  112  may connect the direction indicating patterns  91  and  92  and the coil portions  42  and  44  to be integrated with each other. In an example embodiment, a first connection pattern  111  connecting the second direction indicating pattern  91  and the first coil portion  42  may be included, and a second connection pattern  112  connecting the second direction indicating pattern  92  and the second coil portion  44  may be included, as shown in  FIG.  1   . However, an example embodiment thereof is not limited thereto, and as illustrated in  FIG.  6   , only the second connection pattern  112  connecting the second direction indicating pattern  92  and the second coil portion  44  may be included, or, although not illustrated, only the first connection pattern  111  connecting the first direction indicating pattern  91  and the first coil portion  42  may be included. As shown in  FIG.  6   , the connection portion  231  existing in the embodiment shown in  FIG.  1    may be removed by the trimming process; however, the present disclosure is not limited thereto. For example, although not shown in  FIG.  6   , the connection portion  231  existing in the embodiment shown in  FIG.  1    may also be kept after the trimming process. 
     When the lead-out portions  62  and  64  are disposed in an “L” shaped form, the coil portions  42  and  44  and the lead-out portions  62  and  64  may be connected by connection conductors  31  and  32 . In a modified example, by including the connection patterns  111  and  112  connecting the coil portions  42  and  44  and the direction indicating patterns  91  and  92  to be integrated with each other, a deviation of inductance caused by current flowing in more than one directions during a plating process may be alleviated, and the coil portions  42  and  44  and the lead-out portions  62  and  64  may be configured to be supported in an upper region of the body  50  as well. Electrical and physical connectivity between the coil portions  42  and  44  and the lead-out portions  62  and  64  may improve in directions of an upper portion of the body  50  in which the direction indicating patterns  91  and  92  are disposed and a lower portion of the body  50  in which the lead-out portions  62  and  64 , formed in an “L” shaped form, are disposed. 
     In an example embodiment, a connection portion  231  disposed between the first and second connection patterns  111  and  112  and supporting the connection patterns  111  and  112  may further be included. A region of the insulating substrate  25  other than the connection portion  231 (such a region may not include a tip of the insulating substrate  25  to support the first lead-out portion  62  and the first dummy lead-out portion  63 , another tip of the insulating substrate  25  to support the second lead-out portion  64  and the first dummy lead-out portion  65 , a portion of the insulating substrate  25  to support the connection conductors  31  and  32 ) may be removed during a trimming process, and a volume occupied by a magnetic material in the body  50  may increase by the volume corresponding to the removed region, thereby improving inductance properties of the coil electronic component  10 . 
     The insulating film  30  may be disposed between the direction indicator  951  and the body  50 , and may insulate the direction indicator  951  from a magnetic material of the body  50 . In an example embodiment, as the first and second coil portions  42  and  44  and the first and second direction indicating patterns  91  and  92  are integrated with each other through the connection patterns  111  and  112 , the insulating film  30  may extend along the first and second connection patterns  111  and  112 . For example, the first coil portion  42 , the first direction indicating pattern  91 , and the first connection pattern  111  may be integrated with one another, and may be filled with a plating layer, for example. Also, the insulating film  30  insulating the first coil portion  42 , the first direction indicating pattern  91 , and the first connection pattern  111  in integrated form may be disposed. Similarly, the second coil portion  44 , the second direction indicating pattern  92 , and the second connection pattern  112  may be plated and filled in an integrated manner, and the insulating film  30  insulating the second coil portion  44 , the second direction indicating pattern  92 , and the second connection pattern  112  in an integrated manner may be disposed. 
     The insulating film  30  may cover the coil portions  42  and  44  such that the insulating film  30  may prevent a magnetic material forming the body  50  from being in directly contact with the coil portions  42  and  44 . The insulating film  30  may be formed by coating an insulating material such as parylene through a chemical vapor deposition (CVD) process, but the method is not limited thereto. The insulating film  30  may be formed by a well-known method such as a screen printing method, a process through exposure and developing of a photo resist (PR), a spray coating process, and the like. 
     The connection conductors  31  and  32  may be disposed on both surfaces of the insulating substrate  25  and may connect the lead-out portions  62  and  64  and the coil portions  42  and  44 , respectively. For example, the first connection conductor  31  may be disposed on one surface of the insulating substrate  25  and may connect the first lead-out portion  62  and the first coil portion  42 , and the second connection conductor  32  may be disposed on the other surface of the insulating substrate  25  and may connect the second lead-out portion  64  and the second coil portion  44 . 
     In an example embodiment, a plurality of each of the connection conductors  31  and  32  maybe provided and may be spaced apart from each other, and accordingly, connection reliability of the coil portions  42  and  44  and the lead-out portions  62  and  64  may improve as compared to a structure in which each of the connection conductors  31  and  32  has a single form. As an example, as the first coil portion  42  and the first lead-out portion  62  maybe connected to each other through a plurality of the first connection conductors  31 , spaced apart from each other, even when one of the first connection conductors  31  is broken, electrical and physical connection between the first coil portion  42  and the first lead-out portion  62  may be maintained through the remaining first connection conductors  31  which are not broken. 
     As a plurality of the connection conductors  31  and  32  are provided and are spaced apart from each other, the body between the connection conductors  31  and  32  may be charged. As an example, as a plurality of the first connection conductors  31  are disposed and are spaced apart from each other, the body may be charged in every space between the first connection conductors  31 . Accordingly, cohesion force between the first connection conductor  31  and the body  50  may increase. 
     In an example embodiment, the coil portions  42  and  44 , the lead-out portions  62  and  64  and the connection conductors  31  and  32  may be integrated with one another. A plating resist for forming the coil portions  42  and  44 , the lead-out portions  62  and  64  and the connection conductors  31  and  32  may be formed in integrated form, and the lead-out portions  62  and  64  and the connection conductors  31  and  32  may be plated together while the coil portions  42  and  44  are plated. 
     Dummy lead-out portions  63  and  65  may be disposed on one surface and the other surface of the insulating substrate  25  opposing each other, respectively, to correspond to the lead-out portions  62  and  64 . For example, the first dummy lead-out portion  63  may be disposed on the other surface of the insulating substrate  25 , and may be disposed to correspond to the first lead-out portion  62  disposed on one surface of the insulating substrate  25 . The second dummy lead-out portion  65  may be disposed on one surface of the insulating substrate  25  and may be disposed to correspond to the second lead-out portion  64  disposed on the other surface of the insulating substrate  25 . By further including the lead-out portions  63  and  65  each having a shape symmetrical with the lead-out portions  62  and  64 , in the coil electronic component  10 , the external electrodes  851  and  852  may be formed more symmetrically by a plating process . Thus, the coil electronic component  10  in the example embodiment may be stably connected to a mounting surface. 
     Referring to  FIGS.  1  to  6   , the external electrodes  851  and  852  and the coil portions  42  and  44  may be connected through the lead-out portions  62  and  64  and the dummy lead-out portions  63  and  65  disposed in the body  50 . The dummy lead-out portions  63  and  65  may be electrically connected to the lead-out portions  62  and  64  through a via (not illustrated) , and may be directly connected to the external electrodes  851  and  852 . As the dummy lead-out portions  63  and  65  are connected to the external electrodes  851  and  852 , cohesion strength between the external electrodes  851  and  852  and the body  50  may improve. As the body  50  includes an insulating resin and a magnetic metal material, and the external electrodes  851  and  852  include a conductive metal, the body  50  and the external electrodes  851  and  852  may not tend to be mixed with each other. Accordingly, by forming the dummy lead-out portions  63  and  65  in the body  50  and exposing the dummy lead-out portions  63  and  65  externally of the body  50 , additional connection between the external electrodes  851  and  852  and the dummy lead-out portions  63  and  65  may be provided. As the connection between the dummy lead-out portions  63  and  65  and the external electrodes  851  and  852  may be connection between metals, adhesion force between the dummy lead-out portions  63  and  65  and the external electrodes  851  and  852  may be stronger than adhesion force between the body  50  and the external electrodes  851  and  852 , and thus, cohesion strength of the external electrodes  851  and  852  with the body  50  may improve. 
     At least one of the coil portions  42  and  44 , the via electrode  46 , the lead-out portions  62  and  64 , the connection conductors  31  and  32 , and the dummy lead-out portions  63  and  65  may include at least one or more conductive layers. 
     As an example, the coil portions  42  and  44 , the lead-out portions  62  and  64 , the connection conductors  31  and  32 , the dummy lead-out portions  63  and  65 , and the via electrode  46  are formed on both surfaces of the insulating substrate  25  through a plating process, each of the coil portions  42  and  44 , the lead-out portions  62  and  64 , the connection conductors  31  and  32 , the dummy lead-out portions  63  and  65 , and the via electrode  46  may include a seed layer, an electroless plating layer, and an electroplating layer. The electroplating layer may have a single layer structure, or may have a multilayer structure. The electroplating layer having a multilayer structure may be formed in a conformal film structure in which one electroplating layer covers the other electroplating layer, or may be formed in a form in which one electroplating layer is layered only on one surface of the other electroplating layer. The seed layers of the coil portions  42  and  44 , the seed layers of the lead-out portions  62  and  64 , the seed layers of the connection conductors  31  and  32 , the seed layers of the dummy lead-out portions  63  and  65 , and the seed layer of the via electrode  46  may be integrated with one another such that a boundary may not be formed therebetween, but an example embodiment thereof is not limited thereto. The electroplating layers of the coil portions  42  and  44 , the electroplating layers of the lead-out portions and  64 , the electroplating layers of the connection conductors  31  and  32 , the electroplating layers of the dummy lead-out portions  63  and  65 , and the electroplating layer of the via electrode  46  may be integrated with one another such that a boundary may not be formed therebetween, but an example embodiment thereof is not limited thereto. 
     Each of the coil portions  42  and  44 , the lead-out portions  62  and  64 , the connection conductors  31  and  32 , the dummy lead-out portions  63  and  65 , and the via electrode  46  may be formed of a conductive material such as copper (Cu) , aluminum (Al) , silver (Ag) , tin (Sn) , gold (Au) , nickel (Ni), lead (Pb), titanium (Ti), or alloys thereof, but the material may not be limited thereto. 
     The external electrodes  851  and  852  may be disposed on the first surface  101 , the second surface  102 , and the third surface  103  of the body  50 . 
     In an example embodiment, the first external electrode  851  connected to the first lead-out portion  62  exposed to the first surface  101  and the third surface  103  of the body  50  and the second external electrode  852  connected to the second lead-out portion  64  exposed to the second surface  102  and the third surface  103  maybe disposed. The first external electrode  851  may cover the first lead-out portion  62 , may extend from the first surface  101  of the body  50 , and may be disposed on the third surface  103 , and may not be disposed on the fourth surface  104 , the fifth surface  105 , and the sixth surface  106  of the body  50 . The second external electrode  852  may cover the second lead-out portion  64 , may extend from the second surface  102  of the body  50 , and may be disposed on the third surface  103 , and may not be disposed on the fourth surface  104 , the fifth surface  105 , and the sixth surface  106  of the body  50 . The external electrodes  851  and  852  may be formed along the shapes of lead-out portions  62  and  64  formed in an “L” shaped form, and an area in which the external electrodes  851  and  852  are disposed may be narrower than a width of the body  50 . 
     The external electrodes  851  and  852  may have a single layer structure or a multilayer structure. Each of the external electrodes  851  and  852  may include a first layer covering the lead-out portions  62  and  64 , and a second layer covering the first layer. In an example embodiment, the first layer may include nickel (Ni) , and the second layer may include tin (Sn). 
       FIG.  5    is a diagram illustrating processes of manufacturing a coil electronic component in order according to a modified example. 
     Referring to  FIG.  5 A , an insulating substrate  25  may be arranged, and a via hole  45  may be formed in the insulating substrate  25 . The via hole  45  may be formed using a mechanical drill or a laser drill, but an example embodiment thereof is not limited thereto. The laser drill may be, for example, CO 2  laser or YAG laser. 
     Referring to  FIG.  5 B , a seed layer  61  may be formed on one surface or the other surface of the insulating substrate  25  opposing each other, and a plating resist  81  having an opening for forming a plating layer may be formed. The plating resist  81  may be a general photosensitive resist film, and a dry film resist, and the like, maybe used, but an example of the plating resist  81  may not be limited thereto. After coating the plating resist  81 , an opening for forming a plating layer may be formed through exposure and developing processes. The opening may be formed to correspond to the coil portions  42  and  44 , the connection patterns  111  and  112 , the direction indicating patterns  91  and  92 , the connection conductors  31  and  32 , and the lead-out portions  62  and  64  described above. 
     The plating resist  81  and the opening may be preferentially formed on one surface of the insulating substrate  25 , the plating resist  81  and the opening may be formed on the other surface of the insulating substrate  25 , and the plating resist  81  and the opening may be formed together on one surface and the other surface of the insulating substrate  25  through the same process. 
     Referring to  FIG.  5 C , the first coil layer  501  (see  FIG.  4   ) may be formed by filling the opening for forming a plating layer disposed on one surface or the other surface of the insulating substrate  25  opposing each other with a conductive metal. The first coil layer  501  may be formed by filling the opening for forming a plating layer with a conductive metal by an electroplating process, and the via electrode  46  may be formed by filling the via hole  45  with a conductive metal by an electroplating process. 
     During the electroplating process, by adjusting current density, concentration of a plating solution, a plating speed, and the like, the first coil layer  501  may be formed as an isotropic growth plating layer in which a degree of growth taken in a width direction may be similar to a degree of growth taken in a thickness direction. By forming the first coil layer  501  as an isotropic growth plating layer, a thickness difference between adjacent coils may be reduced such that the coils may have a uniform thickness, and accordingly, distribution of direct current resistance (Rdc) may decrease. Also, by forming the first coil layer  501  as an isotropic growth plating layer, the coil portions  42  and  44  may be formed straight without being bent such that shorts between adjacent coils may be prevented, and the defect in which the insulating film  30  is not formed in portions of the coil portions  42  and  44  may be prevented. 
     As the first coil layer  501  and the first conductor layer  51  are plated and filled in an integrated manner by the above-described electroplating process, the coil portions  42  and  44  and the direction indicator  951  may be integrated without performing an additional process. 
     Although not illustrated in detail, the second coil layer  502  (shown in  FIG.  4   ) covering the first coil layer  501  may be formed on the first coil layer  501 . As the second coil layer  502  and the second conductor layer  52  may be plated and filled in an integrated manner, the coil portions  42  and  44  and the direction indicator  951  may be formed in integrated form without performing a separate process, and by configuring the coil layers  501  and  502  to have two or more layers, an area of a cross-sectional surface of a coil conductor may further increase such that direct current resistance (Rdc) and inductance (Ls) properties may improve. 
     A plating process may be preferentially performed on the opening disposed on one surface of the insulating substrate  25 , and the opening disposed on the other surface of the insulating substrate  25  may be filled with a conductive metal, but an example embodiment thereof may not be limited thereto. The openings disposed on one surface and the other surface of the insulating substrate  25  opposing each other may be filled with a conductive metal together during the same plating process. 
     Referring to  FIG.  5 D , the plating resist  81  may be removed, the seed layer  61  may be etched, and the seed layer  61  may only be remained on a lower surface of the first coil layer  501 . 
     A method of plating the coil portions  42  and  44  may not be limited to the above-described example. The coil portions  42  and  44  may be formed by a method of forming the seed layer  61  in a shape of a coil pattern and forming the plating resist  81  on a side portion of the seed layer  61 . The coil portions  42  and  44  may be formed by filling the opening for forming a plating layer with a conductive material and removing the plating resist  81 . 
     Referring to  FIG.  5 E , a region of the insulating substrate  25  other than a region in which the coil portions  42  and  44  including the first and second coil layers  501  and  502  and the first and second conductor layers  51  and  52  are disposed may be removed (trimming process). A central portion of the insulating substrate  25  maybe removed, and a through-hole (not illustrated) may be formed. The removing of the insulating substrate  25  maybe performed using a mechanical drill, a laser drill, a sand blast, a punching process, and the like. 
     An insulating film  30  covering the first and second coil portions  42  and  44  may be formed. The insulating film  30  may be formed by a well-known method such as a screen printing method, a process through exposure and developing of photo resist (PR) , a spray coating process, a vapor deposition process, or the like. 
     Referring to  FIG.  5 F , the body  50  may be formed by layering, pressuring, and curing magnetic material sheets in an upper portion and a lower portion of the first and second coil portions  42  and  44 . The through-hole (not illustrated) may be filled with a magnetic material, thereby forming a core portion  71 . 
     The external electrodes  851  and  852  may be formed on an external portion of the body  50  such that the external electrodes  851  and  852  may be connected to end portions of the first and second coil portions  42  and  44  exposed to a surface of the body  50 , respectively. 
     Further Example Embodiment 
       FIG.  7    is a perspective diagram illustrating a coil electronic component according to another modified example.  FIG.  8    is a diagram illustrating a body of a coil electronic component illustrated in  FIG.  7    viewed from a fifth surface of the body. 
     Referring to  FIGS.  7  and  8   , as compared to the coil electronic component  10  described in the aforementioned example embodiment, a presence of the end portion  24 , a portion of which is exposed to an upper surface  104  of a body  50 , maybe different. Thus, in the example embodiment, only a shape of the end portion  24  will be described. The other elements of the example embodiment may be the same as in the aforementioned example embodiments. 
     According to another example embodiment, a region of the insulating substrate  25  corresponding to the end portion  24  in the aforementioned embodiment may be removed by CO 2  laser, and the like, during a process of trimming an insulating substrate  25  after a process of plating coil portions  42  and  44 . By the trimming process, one region of the insulating substrate  25  in the body  50  may be removed. Referring to FIG.  7 , the end portion  24  may be removed during the trimming process, and accordingly, a volume occupied by a magnetic material in the body  50  may increase by the volume corresponding to the removed region of the insulating substrate  25 . Thus, as compared to an example in which the end portion  24  remains in the body  50 , inductance properties of a coil electronic component  100  may further improve, and a size of the coil component may be reduced. 
     According to the aforementioned example embodiments, a direction of rotation of a coil may be easily identified in a direction of an upper surface of the coil electronic component without increasing the number of processes. 
     While the exemplary 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 invention as defined by the appended claims.