Patent Publication Number: US-9899136-B2

Title: Coil component and method of manufacturing the same

Description:
CROSS-REFERENCE TO RELATED APPLICATION(S) 
     This application claims benefit of priority to Korean Patent Application No. 10-2016-0058822 filed on May 13, 2016 in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference in its entirety. 
     BACKGROUND 
     1. Field 
     The present disclosure relates to a coil component and a method of manufacturing the same. 
     2. Description of Related Art 
     In accordance with the miniaturization and thinning of electronic devices such as digital televisions (TV), mobile phones, laptop computers, and the like, the miniaturization and thinning of coil components used in such electronic devices have been demanded. In order to satisfy such demand, research into and development of various wound coil components, thin film coil components and stacked coil components have been actively conducted. 
     A main issue concerning the miniaturization and the thinning of coil components is whether miniaturized and thinned components can provide characteristics equal to characteristics of existing coil components in spite of the miniaturization and the thinning. In order to satisfy the demand for miniaturized and thinned components with such characteristics, a core may need to be provided that is filled with a magnetic material, and that has a sufficient size and low direct current (DC) resistance R dc . To this end, a coil pattern is fabricated using a technology capable of increasing an aspect ratio of a pattern and a cross-sectional area of a coil, for example anisotropic plating technology. 
     Meanwhile, in manufacturing a coil component using anisotropic plating technology, the risk of occurrence of defects resulting from a decrease in uniformity of plating growth, the risk of occurrence of short-circuits between coils, and the like, have increased due to an increase in an aspect ratio. In addition, a support member used in order to apply the anisotropic plating technology should have a predetermined thickness in order to maintain the rigidity thereof. Therefore, a thickness of a magnetic material covering the coil is inevitably reduced, such that there may be a limitation in implementing high magnetic permeability (Ls). 
     SUMMARY 
     An aspect of the present disclosure may provide a new coil component in which a thickness of a magnetic material covering a coil may be sufficiently secured while a pattern having a high aspect ratio (AR) may be implemented, and a method of manufacturing the same. 
     According to an aspect of the present disclosure, a coil component may be provided, in which a plurality of coil layers in which a plurality of conductors having a planar spiral shape are stacked are formed, and are electrically connected to each other through a bump to form a single coil having coil turns adjacent to teach other in horizontal and vertical directions, without using a support member used in order to apply anisotropic plating technology. 
     According to an aspect of the present disclosure, a coil component may include a body portion including a magnetic material, a coil portion disposed in the body portion, and an electrode portion disposed on the body portion and electrically connected to the coil portion. The coil portion includes: a first coil layer in which a plurality of conductors having a planar spiral shape are stacked, a second coil layer in which a plurality of conductors having a planar spiral shape are stacked, and a first bump disposed between the first and second coil layers to electrically connect the first and second coil layers to each other. The first coil layer and the second coil layer are electrically connected to each other through the first bump to form a single coil having coil turns adjacent to each other in horizontal and vertical directions. 
     According to another aspect of the present disclosure, a method of manufacturing a coil component may include forming a coil portion in a body portion including a magnetic material, and forming an electrode portion on the body portion, the electrode portion being electrically connected to the coil portion. The forming of the coil portion includes: preparing a substrate including a support member and one or more metal layers disposed on opposing surfaces of the support member; forming insulating layers on the metal layers on each of the opposing surfaces of the support member; forming patterns in the insulating layers, the patterns having a planar spiral shape; forming first plating layers on the metal layers exposed through the patterns formed in the insulating layers and having the planar spiral shape on each of the opposing surfaces of the support member; forming resin layers on the first plating layers, respectively; forming vias in the resin layers, the vias being connected to the first plating layers; forming a bump in at least one of the vias; separating at least one of the metal layers from the support member; electrically connecting the respective first plating layers to each other through the bump by contacting the resin layers to each other and stacking the resin layers so that the respective vias are connected to each other; removing the metal layers remaining on the respective insulating layers; and forming second plating layers, respectively, on the first plating layers exposed due to the removal of the metal layers. The respective first plating layers connected to each other through the bump and the respective second plating layers formed on the respective first plating layers are electrically connected to each other to form a single coil having coil turns adjacent to each other in horizontal and vertical directions. 
     According to another aspect of the present disclosure, a coil component may include a body portion including a magnetic material, a coil portion disposed in the body portion, and an electrode portion disposed on the body portion and electrically connected to the coil portion. The coil portion includes: a first coil layer in which first and second conductors are stacked in a stacking direction, wherein each of the first and second conductors of the first coil layer has a planar spiral shape and an aspect ratio of 0.8 to 1.5; and a second coil layer in which first and second conductors are stacked in the stacking direction, wherein each of the first and second conductors of the second coil layer has a planar spiral shape and an aspect ratio of 0.8 to 1.5. The first and second coil layers are stacked in the stacking direction. 
    
    
     
       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 view illustrating various exemplary coil components used in electronic devices; 
         FIG. 2  is a schematic perspective view illustrating an example of a coil component; 
         FIG. 3  is a schematic cross-sectional view of the coil component of  FIG. 2  taken along line I-I′; 
         FIGS. 4 through 11  are schematic views illustrating an exemplary process of manufacturing the coil component of  FIG. 2 ; 
         FIG. 12  is a schematic perspective view illustrating another example of a coil component; 
         FIG. 13  is a schematic cross-sectional view of the coil component of  FIG. 12  taken along line II-II′; 
         FIGS. 14 through 23  are schematic views illustrating an exemplary process of manufacturing the coil component of  FIG. 12 ; 
         FIG. 24  is a schematic perspective view illustrating another example of a coil component; 
         FIG. 25  is a schematic cross-sectional view of the coil component of  FIG. 24  taken along line III-III′; 
         FIGS. 26 through 41  are schematic views illustrating an exemplary process of manufacturing the coil component of  FIG. 24 ; and 
         FIG. 42  is a schematic view illustrating an example of a coil component to which anisotropic plating technology is applied. 
     
    
    
     DETAILED DESCRIPTION 
     Hereinafter, exemplary embodiments will be described in more detail with reference to the accompanying drawings. In the drawings, shapes, sizes, and the like, of components may be exaggerated for clarity. 
     Meanwhile, in the present disclosure, the meaning of an “electrical connection” of one component to another component includes a case in which one component is physically connected to another component and a case in which one component is not physically connected to another component. It can be understood that when an element is referred to with “first” and “second”, the element is not limited thereby. The terms may be used only to distinguish one element from other elements, and may not limit the sequence or importance of the elements. In some cases, a first element may be referred to as a second element without departing from the scope of the claims set forth herein. Similarly, a second element may also be referred to as a first element. 
     In addition, the term “example” used in the present disclosure does not mean the same exemplary embodiment, but is provided in order to emphasize and describe different unique features. However, aspects of one example may be implemented to be combined with features of other examples. For example, one element described in a particular exemplary embodiment, even if it is not described in another exemplary embodiment, may be understood as being amendable to being combined with the other exemplary embodiment unless an opposite or contradictory description is provided herein. 
     In addition, terms used in the present disclosure are used only in order to describe an example rather than limit the scope of the present disclosure. In this case, singular forms include plural forms unless interpreted otherwise in context. 
     Electronic Device 
       FIG. 1  is a schematic view illustrating various exemplary coil components used in electronic devices. 
     Referring to the drawing, it may be appreciated that various kinds of electronic components are used in electronic devices. For example, an application processor, a direct current (DC) to DC converter, a communications processor, a wireless local area network (WLAN), Bluetooth (BT), wireless fidelity (WiFi), frequency modulation (FM), global positioning system (GPS), or near field communications (NFC) transceiver, a power management integrated circuit (PMIC), a battery, a SMBC, a liquid crystal display (LCD) or active matrix organic light emitting diode (AMOLED) display, an audio codec, a universal serial bus (USB) 2.0/3.0 interface, a high definition multimedia interface (HDMI), a CAM, and the like, may be used. In this case, various kinds of coil components may be appropriately used in interconnections between these electronic components depending on their intended purposes in order to remove noise, or the like. For example, a power inductor  1 , high frequency (HF) inductors  2 , a general bead  3 , a bead  4  for a high frequency (GHz) application, common mode filters  5 , and the like, may be used. 
     In detail, the power inductor  1  may be used to store electricity in magnetic field form to maintain an output voltage, thereby stabilizing power. In addition, the high frequency (HF) inductor  2  may be used to perform impedance matching to secure a required frequency or cut off noise and an alternating current (AC) component. Further, the general bead  3  may be used to remove noise from power and signal lines or remove a high frequency ripple. Further, the bead  4  for high frequency (GHz) applications may be used to remove high frequency noise from a signal line and a power line related to audio. Further, the common mode filter  5  may be used to pass a current therethrough in a differential mode and remove only common mode noise. 
     An electronic device may typically be a smartphone, but is not limited thereto. The electronic device may also be, for example, a personal digital assistant, a digital video camera, a digital still camera, a network system, a computer, a monitor, a television, a video games console, or a smartwatch. The electronic device may also be various other types of electronic devices well-known to those skilled in the art, in addition to the devices described above. 
     Coil Component 
     Hereinafter, a coil component according to the present disclosure will be described, and a structure of an inductor, particularly, a power inductor, will be described by way of example for convenience. However, the coil component according to the present disclosure may also be applied to other coil component types used for various purposes. 
     Meanwhile, hereinafter, a side portion refers to directions in a first direction or a second direction for convenience, an upper portion refers to a direction in a third direction for convenience, and a lower portion refers to a direction opposite to the third direction for convenience. In addition, the phrase “positioned at the side portion, the upper portion, or the lower portion” is used to reference cases in which a target component is positioned in a corresponding direction but does not directly contact a reference component, as well as to reference cases in which the target component directly contacts the reference component in the corresponding direction. 
     However, these directions have been defined for convenience of explanation, and the scope of the present disclosure is not limited by the directions defined as above. 
       FIG. 2  is a schematic perspective view illustrating an example of a coil component  100 A. 
       FIG. 3  is a schematic cross-sectional view of the coil component  100 A taken along line I-I′ of  FIG. 2 . 
     Referring to the drawings, the coil component  100 A according to an exemplary embodiment may include a body portion  10 , a coil portion  20  disposed in the body portion  10 , and an electrode portion  80  disposed on the body portion  10  and electrically connected to the coil portion  20 . 
     The body portion  10  may form an exterior of the coil component  100 A, and may have first and second surfaces opposing each other in a first direction, third and fourth surfaces opposing each other in a second direction, and fifth and sixth surfaces opposing each other in a third direction. The body portion  10  may have a hexahedral shape. However, a shape of the body portion  10  is not limited thereto. The body portion  10  may include a magnetic material  11 . The magnetic material  11  included in the body portion  10  may cover an upper portion and a lower portion of the coil portion  20 , and fill a through-hole formed in a central portion of the coil portion  20  to improve operational characteristics (e.g., inductance, resistance, or the like) of the coil component  100 A. 
     The magnetic material  1  is not limited, as long as it has magnetic properties, and may be, for example, Fe alloys such as a pure iron powder, an Fe—Si-based alloy powder, an Fe—Si—Al-based alloy powder, an Fe—Ni-based alloy powder, an Fe—Ni—Mo-based alloy powder, an Fe—Ni—Mo—Cu-based alloy powder, an Fe—Co-based alloy powder, an Fe—Ni—Co-based alloy powder, an Fe—Cr-based alloy powder, an Fe—Cr—Si-based alloy powder, an Fe—Ni—Cr-based alloy powder, an Fe—Cr—Al-based Fe alloy power, or the like, amorphous alloys such as an Fe-based amorphous alloy, a Co-based amorphous alloy, or the like, spinel type ferrites such as an Mg—Zn-based ferrite, an Mn—Zn-based ferrite, an Mn—Mg-based ferrite, a Cu—Zn-based ferrite, an Mg—Mn—Sr-based ferrite, an Ni—Zn-based ferrite, or the like, hexagonal ferrites such as a Ba—Zn-based ferrite, a Ba—Mg-based ferrite, a Ba—Ni-based ferrite, a Ba—Co-based ferrite, a Ba—Ni—Co-based ferrite, or the like, or garnet ferrites such as a Y-based ferrite, or the like. 
     The magnetic material  11  may include metal magnetic powder particles  11   a ,  11   b , and  11   c , and a resin. The metal magnetic powder particles  11   a ,  11   b , and  11   c  may include iron (Fe), chromium (Cr), or silicon (Si) as main components. For example, the metal magnetic powder particles  11   a ,  11   b , and  11   c  may include iron (Fe)-nickel (Ni), iron (Fe), iron (Fe)-chromium (Cr)-silicon (Si), or the like, but are not limited thereto. The resin may include epoxy, polyimide, a liquid crystal polymer (LCP), or the like, or a mixture thereof, but is not limited thereto. The metal magnetic powder particles  11   a ,  11   b , and  11   c  may have average particle sizes d 1 , d 2 , and d 3 , respectively. In this case, the metal magnetic powder particles  11   a ,  11   b , and  11   c  having different sizes may be used and compressed together be fully filled in a magnetic resin composite, thereby increasing a packing factor. As a result, characteristics of the coil component  100 A may be improved. 
     The purpose of the coil portion  20  may be to implement operational characteristics of the coil component  100 A, and the coil component  100 A may perform various functions in the electronic device through the operational characteristics implemented by a coil segment of the coil portion  20 . For example, the coil component  100 A may be the power inductor, as described above. In this case, the coil may serve to store electricity in magnetic field form to maintain an output voltage, thereby stabilizing power. The coil portion  20  may include a plurality of coil layers  21  and  22 , and the plurality of coil layers  21  and  22  may be electrically connected to each other to form a single coil of which the turns are increased in horizontal and vertical directions. The respective coil layers  21  and  22  may have a form in which a plurality of conductors  21   a ,  21   b , and  21   c , and  22   a ,  22   b , and  22   c  having a planar spiral shape are stacked. For example, the respective coil layers  21  and  22  may be formed by forming patterns in a planar spiral shape, where the patterns have a cross-sectional shape that is substantially dumbbell shaped. 
     The coil portion  20  may include a first coil layer  21  in which first to third conductors  21   a ,  21   b , and  21   c  having a planar spiral shape are stacked, a second coil layer  22  in which first to third conductors  22   a ,  22   b , and  22   c  having a planar spiral shape are stacked, a first bump  31  disposed between the first and second coil layers  21  and  22  to electrically connect the first and second coil layers  21  and  22  to each other, a first resin layer  41  in which the first conductor  21   a  of the first coil layer  21  and the first conductor  22   a  of the second coil layer  22  are embedded, a first insulating layer  51  disposed between portions of the first and second conductors  21   a  and  21   b  of the first coil layer  21 , a second insulating layer  52  disposed between portions of the first and second conductors  22   a  and  22   b  of the second coil layer  22 , a first insulating film  61  covering a surface of the second conductor  21   b  of the first coil layer  21 , and a second insulating film  62  covering a surface of the second conductor  22   b  of the second coil layer  22 . The first bump  31  may penetrate through the first resin layer  41  between the first conductor  21   a  of the first coil layer  21  and the first conductor  22   a  of the second coil layer  22 , the third conductor  21   c  of the first coil layer  21  may penetrate through the first insulating layer  51 , and the third conductor  22   c  of the second coil layer  22  may penetrate through the second insulating layer  52 . 
     The first and second coil layers  21  and  22  may include the first conductors  21   a  and  22   a , the second conductors  21   b  and  22   b , and the third conductors  21   c  and  22   c  disposed between the first conductors  21   a  and  22   a  and the second conductors  21   b  and  22   b  to connect the first conductors  21   a  and  22   a  and the second conductors  21   b  and  22   b  to each other, respectively. Each of the first to third conductors  21   a ,  22   a ,  21   b ,  22   b ,  21   c , and  22   c  may have the planar spiral shape. Line widths of the first and second conductors  21   a ,  21   b ,  22   a , and  22   b  may be wider than those of the third conductors  21   c  and  22   c . For example, a cross-sectional shape of each of the first and second coil layers  21  and  22  in which the first to third conductors  21   a ,  22   a ,  21   b ,  22   b ,  21   c , and  22   c  are stacked may be substantially dumbbell shaped, but is not limited thereto. Materials of the first to third conductors  21   a ,  22   a ,  21   b ,  22   b ,  21   c , and  22   c  may be 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 are not limited thereto. Each of the first and second coil layers  21  and  22  in which the first to third conductors  21   a ,  22   a ,  21   b ,  22   b ,  21   c , and  22   c  are connected to each other may have two or more coil turns in a planar direction, that is, a horizontal direction in the orientation shown in  FIG. 3 . 
     The first conductors  21   a  and  22   a  and the third conductors  21   c  and  22   c  may be formed by the same process. Therefore, the first conductors  21   a  and  22   a  and the third conductors  21   c  and  22   c  may include the same material, and a boundary may not be present between the first conductors  21   a  and  22   a  and the third conductors  21   c  and  22   c . The second conductors  21   b  and  22   b  and the third conductors  21   c  and  22   c  may be formed by separate processes. Therefore, the second conductors  21   b  and  22   b  and the third conductors  21   c  and  22   c  may include the same material, but a boundary may be present between the second conductors  21   b  and  22   b  and the third conductors  21   c  and  22   c . The first and third conductors  21   a  and  21   c  of the first coil layer  21  may be formed on one side of the first insulating layer  51  by applying anisotropic plating, and the second conductor  21   b  of the first coil layer  21  may be formed on the other side of the first insulating layer  51  by applying anisotropic plating. The first and third conductors  22   a  and  22   c  of the second coil layer  22  may be formed on one side of the second insulating layer  52  by applying anisotropic plating, and the second conductor  22   b  of the second coil layer  22  may be formed on the other side of the second insulating layer  52  by applying anisotropic plating. As described above, the first and second coil layers  21  and  22  may be formed on both sides of the insulating layers  51  and  52 , respectively, by applying the anisotropic plating, such that the first and second coil layers  21  and  22  may have the cross-sectional shape having a high aspect ratio (AR), such as the substantially dumbbell shape, without a defect such as a short-circuit, or the like. In this case, a pattern formed by anisotropic plating in any one direction may have an aspect ratio (AR) of approximately 0.8 to 1.5. 
     The first bump  31  may be disposed between the first and second coil layers  21  and  22  to electrically connect the first and second coil layers  21  and  22  to each other. The first bump  31  may be formed by electroplating, paste printing, or the like, and a material of the first bump  31  may be, for example, tin (Sn)/copper (Cu), tin (Sn)-silver (Ag)/copper (Cu), copper (Cu) coated with silver (Ag)/tin (Sn), copper (Cu)/tin (Sn)-bismuth (Bi), or the like, but is not limited thereto. The first bump  31  may include an intermetallic compound (IMC). The intermetallic compound (IMC) may be formed in a high temperature vacuum pressing process among processes of manufacturing the coil component  100 A. The intermetallic compound (IMC) may increase interlayer connection strength and decrease conduction resistance to enable a smooth flow of electrons. The first and second coil layers  21  and  22  may be electrically connected to each other through the first bump  31 , thereby forming a single coil having a large number of turns wound in horizontal and vertical directions with respect to each other. 
     The first resin layer  41  may embed the first conductor  21   a  of the first coil layer  21  and the first conductor  22   a  of the second coil layer  22  therein. The first resin layer  41  may be formed by integrating a resin layer embedding the first conductor  21   a  of the first coil layer  21  therein and a resin layer embedding the first conductor  22   a  of the second coil layer  22  therein with each other by matching stacking. A boundary between these resin layers may or may not be apparent. A known insulating material may be used as a material of the first resin layer  41 , and a photoimageable dielectric (PID) may additionally or alternatively be used as the material of the first resin layer  41 , if necessary. However, the material of the first resin layer  41  is not limited thereto. The first bump  31  may penetrate through the first resin layer  41  between the first conductor  21   a  of the first coil layer  21  and the first conductor  22   a  of the second coil layer  22 . In this case, when the photoimageable dielectric (PID) is used as the material of the first resin layer  41 , a via for forming the first bump  31  may be formed by a known exposure and development method, such as a photolithography method. Therefore, the via may be more thinly and finely formed, such that a thickness of a coil through which a current flows may be constant. A magnetic film, for example, a curable insulating material containing a magnetic filler may also be used as the material of the first resin layer  41 , if necessary. In this case, magnetic density of the coil component  100 A may be increased. In a case in which the curable insulating material containing the magnetic filler is used, a via for forming the first bump  31  may be formed using laser drilling, or the like. 
     The first and second insulating layers  51  and  52  may be disposed between the first and second conductors  21   a  and  21   b  of the first coil layer  21  and between the first and second conductors  22   a  and  22   b  of the second coil layer  22 , respectively. The first and second coil layers  21  and  22 , in which the plurality of conductors  21   a ,  22   a ,  21   b ,  22   b ,  21   c , and  22   c  having the planar spiral shape are stacked, may be formed on both sides of the first and second insulating layers  51  and  52 , respectively, by applying anisotropic plating technology. Therefore, the first and second coil layers  21  and  22  may be implemented to have the cross-sectional shape having a high aspect ratio (AR), such as the substantially dumbbell shape, without a defect such as a short-circuit, or the like, occurring. A known insulating material may be used as materials of the first and second insulating layers  51  and  52 . Particularly, a photoimageable dielectric (PID) may be used as the materials of the first and second insulating layers  51  and  52 . However, the materials of the first and second insulating layers  51  and  52  are not limited thereto. The third conductors  21   c  and  22   c  of the first and second coil layers  21  and  22  may penetrate through the first and second insulating layers  51  and  52 , respectively. In a case in which the photoimageable dielectric (PID) is used as the materials of the first and second insulating layers  51  and  52 , patterns having a planar spiral shape for forming the third conductors  21   c  and  22   c  of the first and second coil layers  21  and  22  may be formed by a known exposure and development method, such as a photolithography method. Therefore, the patterns may be more easily and accurately formed. 
     The first resin layer  41  may have a thickness greater than those of the first and second insulating layers  51  and  52 . That is, the first and second insulating layers  51  and  52  may have a very reduced thickness. In addition, since an insulating thickness between patterns of each of the first and second coil layers  21  and  22  is easily adjusted, thicknesses of the first resin layer  41 , the first insulating layer  51 , and the second insulating layer  52  may be significantly reduced. Therefore, an overall thickness of the coil portion  20  may be reduced. As a result, a thickness of the magnetic material  11  covering the upper portion and the lower portion of the coil portion  20  may be increased (e.g., without increasing an overall size of the coil component  100 A), such that magnetic permeability of the coil component  100 A may be improved. 
     The first and second insulating films  61  and  62  may cover the surface of the second conductor  21   b  of the first coil layer  21  and the surface of the second conductor  22   b  of the second coil layer  22 , respectively. The first and second insulating films  61  and  62  may be formed, if necessary, in order to insulate between patterns of the second conductors  21   b  and  22   b  of the first and second coil layers  21  and  22 , have fluidity, fill electrodes of 5 μm to 10 μm, and be formed by insulation coating using a polymer-based insulating material having insulation properties, for example perylene, or the like. 
     The electrode portion  80  may serve to electrically connect the coil component  100 A and an electronic device to each other when the coil component  100 A is mounted in the electronic device. The electrode portion  80  may include a first electrode  81  and a second electrode  82  disposed on the body portion  10  so as to be spaced apart from each other. The first and second electrodes  81  and  82  may cover, respectively, the first and second surfaces of the body portion  10  opposing each other in the first direction, and may be extended to the third to sixth surfaces of the body portion  10  connected to the first and second surfaces of the body portion  10 . The first and second electrodes  81  and  82  may be electrically connected to first and second lead terminals (not denoted by reference numerals) of the coil portion  20  on the first and second surfaces of the body portion  10 , respectively. However, disposition forms of the first and second electrodes  81  and  82  are not limited thereto. The first and second electrodes  81  and  82  may include, for example, conductive resin layers and conductor layers formed on the conductive resin layers, respectively. The conductive resin layer may include one or more conductive metals selected from the group consisting of copper (Cu), nickel (Ni), and silver (Ag), and a thermosetting resin. The conductor layer may include one or more selected from the group consisting of nickel (Ni), copper (Cu), and tin (Sn). For example, a nickel (Ni) layer and a tin (Sn) layer may be sequentially formed in the conductor layer. However, the conductive resin layer and the conductor layer are not limited thereto. 
       FIGS. 4 through 11  are schematic views illustrating an exemplary process of manufacturing the coil component  100 A of  FIG. 2 . 
     Referring to  FIG. 4 , first, a substrate  200  may be prepared. The substrate  200  may include a support member  201 , first metal layers  202  and  203  disposed on two opposing surfaces of the support member  201 , and second metal layers  204  and  205  disposed on the first metal layers  202  and  203 , respectively. In some cases, the first and second metal layers  202 ,  203 ,  204 , and  205  may be formed on only one surface of the support member  201 , and/or only the second metal layers  204  and  205  may be disposed on both opposing surfaces of the support member  201 . The support member  201  may be an insulating substrate formed of an insulating resin. The insulating resin may be a thermosetting resin such as an epoxy resin, a thermoplastic resin such as a polyimide resin, a resin having a reinforcement material such as a glass fiber or an inorganic filler impregnated in the thermosetting resin and the thermoplastic resin, for example, prepreg, Ajinomoto Build up Film (ABF), FR-4, Bismaleimide Triazine (BT), or the like. The first and second metal layers  202 ,  203 ,  204 , and  205  may generally be thin copper foils, but are not limited thereto. That is, the first and second metal layer  202 ,  203 ,  204 , and  205  may include other metals. As a non-restrictive example, the substrate  200  may be a copper clad laminate (CCL). Next, the first and second insulating layers  51  and  52  may be formed, respectively, on the second metal layers  204  and  205  disposed on opposing sides of the substrate  200 . The first and second insulating layers  51  and  52  may be formed by a method of laminating the abovementioned insulating material such as the photoimageable dielectric (PID) at a predetermined thickness such as about 10 μm to 20 μm. Next, patterns  51 P and  52 P having a planar spiral shape may be formed in the first and second insulating layers  51  and  52 , respectively. In a case in which the materials of the first and second insulating layers  51  and  52  are the photoimageable dielectric (PID), the patterns  51 P and  52 P having the planar spiral shape may be formed by a known photolithography method, that is, processes such as exposure, development, drying, and the like. When the patterns  51 P and  52 P having the planar spiral shape are formed, the second metal layers  204  and  205  disposed on opposing sides of the substrate  200  may be externally exposed so as to be used as seed layers in a plating process, the subsequent process. 
     Referring to  FIG. 5 , dry films  210  and  220  may be formed on the first and second insulating layers  51  and  52 , respectively. A method of forming the dry films  210  and  220  is also not particularly limited. For example, the dry films  210  and  220  may be formed by laminating materials of the dry films  210  and  220  having a predetermined thickness such as about 80 μm to 150 μm by a known method. Next, dams  210 P and  220 P for performing a plating process may be formed in the dry films  210  and  220 , respectively, by a known photolithography method. The dams  210 P and  220 P may be, for example, for anisotropic plating, but are not limited thereto. Next, first plating layers  21 A and  22 A may be formed, respectively, on the second metal layers  204  and  205  exposed through the patterns formed on the first and second insulating layers  51  and  52  and having the planar spiral shape and disposed on both opposing sides of the substrate  200 . The first plating layers  21 A and  22 A may be formed by a known plating method such as anisotropic electroplating using the exposed second metal layers  204  and  205  as seed layers. The first plating layers  21 A and  22 A may include the third conductors  21   c  and  22   c  filling the patterns formed in the first and second insulating layers  51  and  52  and having the planar spiral shape and the first conductors  21   a  and  22   a  formed on the third conductors  21   c  and  22   c , respectively, and a boundary may not be particularly present between the first conductors  21   a  and  22   a  and the third conductors  21   c  and  22   c . Line widths of the first conductors  21   a  and  22   a  of the first plating layers  21 A and  22 A may be approximately 80 μm to 120 μm, thicknesses of the first conductors  21   a  and  22   a  of the first plating layers  21 A and  22 A may be approximately 80 μm to 120 μm, intervals between lines of the first conductors  21   a  and  22   a  of the first plating layers  21 A and  22 A may be approximately 2 μm to 5 μm, and aspect ratios (ARs) of patterns of the first conductors  21   a  and  22   a  of the first plating layers  21 A and  22 A (measured as ratios of the height, measured in the third direction, divided by the width, measured in the first direction) may be about 0.8 to 1.5, but are not limited thereto. 
     Referring to  FIG. 6 , the dry films  210  and  220  may be stripped. The dry films  210  and  220  may be stripped by a known etching method, but the present disclosure is not limited thereto. In this case, if necessary, insulating films (not illustrated) may be formed on surfaces of the first conductors  21   a  and  22   a  of the first plating layers  21 A and  22 A by insulation coating to prevent non-filling between patterns. Next, resin layers  41   a  and  41   b  may be formed on the first plating layers  21 A and  22 A, respectively. The resin layers  41   a  and  41   b  may embed the first conductors  21   a  and  22   a  of the first plating layers  21 A and  22 A, respectively, therein such that the first conductors  21   a  and  22   a  are fully encased in the resin layers. The resin layers  41   a  and  41   b  may also be formed by a method of laminating an insulating material such as a photoimageable dielectric (PID) at a predetermined thickness such as about 80 μm to 150 μm. Alternatively, the resin layers  41   a  and  41   b  may also be formed by a method of laminating a magnetic film having a predetermined thickness such as about 80 μm to 150 μm, for example, a curable film containing a magnetic filler. Next, vias  41   ah  and  41   bh  connected to (or extending to) the first plating layers  21 A and  22 A may be formed in the resin layers  41   a  and  41   b , respectively. The vias  41   ah  and  41   bh  may be formed by a known photolithography method in a case in which the resin layers  41   a  and  41   b  include the photoimageable dielectric (PID), and be formed by a known laser drilling method, or the like, in a case in which the resin layers  41   a  and  41   b  include a curable insulating material. 
     Referring to  FIG. 7 , the first bump  31  may be formed in at least one of the vias  41   ah  and  41   bh  formed in the resin layers  41   a  and  41   b . The first bump  31  may be formed by a known method such as electroplating, paste printing, or the like. Meanwhile, the first bump  31  may protrude from a surface of the resin layer  41   a  or  41   b , and a thickness of the first bump  31  protruding from the surface of the resin layer  41   a  or  41   b  may be approximately 5 μm to 10 μm. Next, black masks  230  and  240  may be formed on the resin layers  41   a  and  41   b , respectively, in order to protect the first bump  31 . The black masks  230  and  240  may also be formed by a known lamination method. Next, the second metal layers  204  and  205  may be separated from the support member  201 . A method of separating the second metal layers  204  and  205  from the support member  201  is not particularly limited. For example, the second metal layers  204  and  205  may be separated from the support member  201  by separating the first and second metal layers  202 ,  203 ,  204 , and  205  disposed on both sides of the support member  201  from each other by a known method. 
     Referring to  FIG. 8 , the black masks  230  and  240  can be removed such that the respective resin layers  41   a  and  41   b  may be matched with each other and stacked so that the vias  41   ah  and  41   bh  formed in the respective resin layers  41   a  and  41   b  are connected to each other. In this case, the first bump  31  formed in any one of the vias  41   ah  and  41   bh  may also be disposed in the other of the vias  41   ah  and  41   bh , such that the respective first plating layers  21 A and  22 A may be electrically connected to each other through the first bump  31 . The respective resin layers  41   a  and  41   b  may adhere to each other by high-temperature compression to form the first resin layer  41 . In this case, the intermetallic compound (IMC) may be formed between the first bump  31  and the first plating layers  21 A and  22 A. As a result, interlayer connection strength may be increased, and conduction resistance may be reduced, thereby enabling a smooth flow of electrons. Next, the second metal layers  204  and  205  remaining on the first and second insulating layers  51  and  52  may be removed. As a method of removing the second metal layers  204  and  205 , a known etching method may be used. Next, dry films  250  and  260  may be formed on portions from which the second metal layers  204  and  205  have been removed. The dry films  250  and  260  may be formed by laminating materials of the dry films  250  and  260  at a predetermined thickness such as 80 μm to 150 μm. 
     Referring to  FIG. 9 , dams  250 P and  260 P for a plating process, the subsequent process, may be formed in the dry films  250  and  260 , respectively, by a known photolithography method. The dams  250 P and  260 P may be, for example, for anisotropic plating, but are not limited thereto. Next, second plating layers  21 B and  22 B may be formed, respectively, on the third conductors  21   c  and  22   c  of the first plating layers  21 A and  22 A exposed through the dams  250 P and  260 P. The second plating layers  21 B and  22 B may be formed by a known plating method such as anisotropic electroplating using the exposed third conductors  21   c  and  22   c  of the first plating layers  21 A and  22 A as seed layers. The second plating layers  21 B and  22 B may include the second conductors  21   b  and  22   b , respectively, and a boundary may also be present between the second conductors  21   b  and  22   b  and the third conductors  21   c  and  22   c . Line widths of the second conductors  21   b  and  22   b  of the second plating layers  21 B and  22 B may be approximately 80 μm to 120 μm, thicknesses of the second conductors  21   b  and  22   b  of the second plating layers  21 B and  22 B may be approximately 80 μm to 120 μm, intervals between lines of the second conductors  21   b  and  22   b  of the second plating layers  21 B and  22 B may be approximately 2 μm to 5 μm, and aspect ratios of patterns of the second conductors  21   b  and  22   b  of the second plating layers  21 B and  22 B (measured as ratios of the height, measured in the third direction, divided by the width, measured in the first direction) may be about 0.8 to 1.5, but are not limited thereto. The first and second plating layers  21 A,  22 A,  21 B, and  22 B may be connected to each other to form the first and second coil layers  21  and  22 , respectively. The first and second coil layers  21  and  22  may be electrically connected to each other through the first bump  31 , thereby forming a single coil having a large number of turns wound in the horizontal and vertical directions with respect to each other. Next, the dry films  250  and  260  may be stripped. The dry films  250  and  260  may be stripped by a known etching method, but the present disclosure is not limited thereto. In this case, if necessary, insulating films (not illustrated) may be formed on surfaces of the second conductors  21   b  and  22   b  of the second plating layers  21 B and  22 B by insulation coating to prevent non-filling between patterns. 
     Referring to  FIG. 10 , a through-hole penetrating through central portions of the first resin layer  41 , the first insulating layer  51 , and the second insulating layer  52  may be formed. A region in which the through-hole is formed may be a core region  20   c  of the coil portion  20 . The through-hole may be formed by a photolithography method, a laser drilling method, a mechanical drilling method, an etching method, or the like. Next, the first and second insulating films  61  and  62  covering, respectively, surfaces of the second conductors  21   b  and  22   b  of the first and second coil layers  21  and  22  may be formed. The first and second insulating films  61  and  62  may be formed by a known insulation coating method. The coil portion  20  may be formed through a series of processes. Next, the magnetic material  11  may cover the upper portion and the lower portion of the coil portion  20  and fill the through-hole formed in the central portion. A method in which the magnetic material  11  covers the upper portion and the lower portion of the coil portion  20  and fills the through-hole may be a method of laminating a plurality of magnetic sheets on the upper portion and the lower portion of the coil portion  20 , but is not limited thereto. The body portion  10  may be formed through a series of processes. 
     Referring to  FIG. 11 , the body portion  10  may be diced to have a desired size and polished. The first and second lead terminals (not denoted by reference numerals) of the coil portion  20  may be exposed, respectively, to the first and second surfaces of the body portion  10  opposing each other in the first direction by dicing and polishing the body portion  10 . Next, the first and second electrodes  81  and  82  covering at least the first and second surfaces of the body portion  10  so as to be connected, respectively, to the first and second lead terminals (not denoted by reference numerals) of the coil portion  20  may be formed. The first and second electrodes  81  and  82  may be formed by, for example, a method of forming conductive resin layers and then forming conductor layers on the conductive resin layers. The conductive resin layer may be formed using paste printing. The conductor layer may be formed using a known plating method, or the like. However, the conductive resin layer and the conductor layer are not limited thereto. The electrode portion  80  may be formed through a series of processes. 
     Meanwhile, processes of manufacturing the coil component according to the exemplary embodiment are not necessarily limited to the abovementioned sequence. That is, a process described second may be first performed and a process described first may be performed as the second process, if necessary. 
       FIG. 12  is a schematic perspective view illustrating another example of a coil component  100 B. 
       FIG. 13  is a schematic cross-sectional view of the coil component  100 B taken along line II-II′ of  FIG. 12 . 
     Hereinafter, a coil component  100 B according to another exemplary embodiment in the present disclosure will be described, but descriptions of contents overlapping the contents described above will be omitted and contents different from the contents described above will mainly be described. 
     Referring to the drawings, in the coil component  100 B according to another exemplary embodiment, a first coil layer  21  and a second coil layer  22  of a coil portion  20  may further include, respectively, fourth conductors  21   d  and  22   d  disposed on second conductors  21   b  and  22   b  and directly connected to the second conductors  21   b  and  22   b . In addition, the coil portion  20  may further include a second resin layer  42  in which the second conductor  21   b  of the first coil layer  21  is embedded, a third resin layer  43  in which the second conductor  22   b  of the second coil layer  22  is embedded, a first insulating layer  51  disposed between a first resin layer  41  and the second resin layer  42 , and a second insulating layer  52  disposed between the first resin layer  41  and the third resin layer  43 . First and second insulating films  61  and  62  may cover a surface of the fourth conductor  21   d  of the first coil layer  21  and a surface of the fourth conductor  22   d  of the second coil layer  22 , respectively. 
     The first and second coil layers  21  and  22  may further include the fourth conductors  21   d  and  22   d , respectively, and thus, have a high aspect ratio (AR). Materials of the fourth conductors  21   d  and  22   d  may be 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 are not limited thereto. That is, in the coil component  100 B according to the other exemplary embodiment, the first and second coil layers  21  and  22  may have forms in which first to fourth conductors  21   a ,  21   b ,  21   c ,  21   d ,  22   a ,  22   b ,  22   c , and  22   d  having a planar spiral shape are stacked, respectively. The fourth conductors  21   d  and  22   d  of the first and second coil layers  21  and  22  and the second conductors  21   b  and  22   b  of the first and second coil layers  21  and  22  may be formed by separate processes. Therefore, even in a case in which the second conductors  21   b  and  22   b  and the fourth conductors  21   d  and  22   d  include the same material, a boundary may be present between the second conductors  21   b  and  22   b  and the fourth conductors  21   d  and  22   d.    
     The second and third resin layers  42  and  43  may embed the second conductor  21   b  of the first coil layer  21  and the second conductor  22   b  of the second coil layer  22 , respectively, therein. The second and third resin layers  42  and  43  may have thicknesses (measured in the third direction) that are at least as large as thicknesses of the second conductor  21   b  of the first coil layer  21  and the second conductor  22   b  of the second coil layer  22 , respectively. A known insulating material may be used as a material of each of the second and third resin layers  42  and  43 , and a photoimageable dielectric (PID) may be used as the material of each of the second and third resin layers  42  and  43 , if necessary. However, the material of each of the second and third resin layers  42  and  43  is not limited thereto. A magnetic film, for example, a curable insulating material containing a magnetic filler may also be used as the material of each of the second and third resin layers  42  and  43 , if necessary. In this case, magnetic density of the coil component  100 B may be increased. The second and third resin layers  42  and  43  may have a thickness greater than those of the first and second insulating layers  51  and  52 . 
       FIGS. 14 through 23  are schematic views illustrating an exemplary process of manufacturing the coil component of  FIG. 12 . 
     Hereinafter, a method of manufacturing a coil component according to another exemplary embodiment in the present disclosure will be described, but descriptions of contents overlapping the contents described above will be omitted and contents different from the contents described above will be mainly described. 
     Referring to  FIG. 14 , a substrate  200  may be first prepared. Next, the first and second insulating layers  51  and  52  may be formed, respectively, on second metal layers  204  and  205  disposed on both sides of the substrate  200 . Next, patterns  51 P and  52 P having a planar spiral shape may be formed on the first and second insulating layers  51  and  52 , respectively. 
     Referring to  FIG. 15 , dry films  210  and  220  may be formed on the first and second insulating layers  51  and  52 , respectively. Next, dams  210 P and  220 P for a plating process, the subsequent process, may be formed in the dry films  210  and  220 , respectively, by a known photolithography method. Next, first plating layers  21 A and  22 A may be formed, respectively, on the second metal layers  204  and  205  exposed through the patterns formed on the first and second insulating layers  51  and  52  and having the planar spiral shape and disposed on both sides of the substrate  200 . 
     Referring to  FIG. 16 , the dry films  210  and  220  may be stripped. Next, resin layers  41   a  and  41   b  may be formed on the first plating layers  21 A and  22 A, respectively. Next, vias  41   ah  and  41   bh  connected to the first plating layers  21 A and  22 A may be formed in the resin layers  41   a  and  41   b , respectively. 
     Referring to  FIG. 17 , a first bump  31  may be formed in at least one of the vias  41   ah  and  41   bh  formed in the resin layers  41   a  and  41   b . Next, black masks  230  and  240  may be formed on the resin layers  41   a  and  41   b , respectively, in order to protect the first bump  31 . Next, the second metal layers  204  and  205  may be separated from the support member  201 . 
     Referring to  FIG. 18 , the respective resin layers  41   a  and  41   b  may be matched with each other and stacked so that the vias  41   ah  and  41   bh  formed in the respective resin layers  41   a  and  41   b  are connected to each other. Next, the second metal layers  204  and  205  remaining on the first and second insulating layers  51  and  52  may be removed. Next, dry films  250  and  260  may be formed on portions from which the second metal layers  204  and  205  have been removed. 
     Referring to  FIG. 19 , dams  250 P and  260 P for a plating process, the subsequent process, may be formed in the dry films  250  and  260 , respectively, by a known photolithography method. Next, second plating layers  21 B and  22 B may be formed, respectively, on the third conductors  21   c  and  22   c  of the first plating layers  21 A and  22 A exposed through the dams  250 P and  260 P. Next, the dry films  250  and  260  may be stripped. 
     Referring to  FIG. 20 , the second and third resin layers  42  and  43  embedding the second conductors  21   b  and  22   b  of the first and second coil layers  21  and  22 , respectively, therein may be formed on the first and second insulating layers  51  and  52 , respectively. The second and third resin layers  42  and  43  may be formed by a method of laminating an insulating material such as a photoimageable dielectric (PID) at a predetermined thickness such as about 80 μm to 150 μm. Alternatively, the second and third resin layers  42  and  43  may also be formed by a method of laminating a magnetic film having a predetermined thickness such as about 80 μm to 150 μm, for example, a curable film containing a magnetic filler. Next, surfaces of the second and third resin layers  42  and  43  may be planarized by a known method to expose the second conductors  21   b  and  22   b  of the second plating layers  21 B and  22 B. Next, dry films  270  and  280  may be formed on the second and third resin layers  42  and  43 , respectively. A method of forming the dry films  270  and  280  is also not particularly limited. For example, the dry films  270  and  280  may be formed by laminating materials of the dry films  270  and  280  having a predetermined thickness such as about 80 μm to 150 μm by a known method. 
     Referring to  FIG. 21 , dams  270 P and  280 P for a plating process, the subsequent process, may be formed in the dry films  270  and  280 , respectively, by a known photolithography method. The dams  270 P and  280 P may be formed by, for example, anisotropic plating, but are not limited thereto. Next, third plating layers  21 C and  22 C may be formed on the exposed second conductors  21   b  and  22   b  of the second plating layers  21 B and  22 B, respectively, by a known plating method such as anisotropic electroplating using the exposed second conductors  21   b  and  22   b  as seed layers. The third plating layers  21 C and  22 C may include the fourth conductors  21   d  and  22   d , respectively. Line widths of the fourth conductors  21   d  and  22   d  of the third plating layers  21 C and  22 C may be approximately 80 μm to 120 μm, thicknesses of the fourth conductors  21   d  and  22   d  of the third plating layers  21 C and  22 C may be approximately 80 μm to 120 μm, intervals between lines of the fourth conductors  21   d  and  22   d  of the third plating layers  21 C and  22 C may be approximately 2 μm to 5 μm, and aspect ratios (measured as ratios of the height, measured in the third direction, divided by the width, measured in the first direction) of patterns of the fourth conductors  21   d  and  22   d  of the third plating layers  21 C and  22 C may be about 0.8 to 1.5, but are not limited thereto. The first to third plating layers  21 A,  22 A,  21 B,  22 B,  21 C, and  22 C may be connected to each other to form the first and second coil layers  21  and  22 , respectively. Next, the dry films  270  and  280  may be stripped. The dry films  270  and  280  may be stripped by a known etching method, but the present disclosure is not limited thereto. 
     Referring to  FIG. 22 , a through-hole penetrating through central portions of the first to third resin layers  41  to  43  and the first and second insulating layers  51  and  52  may be formed. A region in which the through-hole is formed may be a core region  20   c  of the coil portion  20 . Next, the first and second insulating films  61  and  62  covering, respectively, surfaces of the fourth conductors  21   d  and  22   d  of the first and second coil layers  21  and  22  may be formed. Next, the magnetic material  11  may cover the upper portion and the lower portion of the coil portion  20  and fill the through-hole formed in the central portion. 
     Referring to  FIG. 23 , the body portion  10  may be diced at a desired size and polished. Next, the first and second electrodes  81  and  82  covering at least the first and second surfaces of the body portion  10  so as to be connected, respectively, to the first and second lead terminals (not denoted by reference numerals) of the coil portion  20  may be formed. The electrode portion  80  may be formed through a series of processes. 
       FIG. 24  is a schematic perspective view illustrating another example of a coil component. 
       FIG. 25  is a schematic cross-sectional view of the coil component taken along line of  FIG. 24 . 
     Hereinafter, a coil component according to another exemplary embodiment in the present disclosure will be described, but descriptions of contents overlapping the contents described above will be omitted and contents different from the contents described above will be mainly described. 
     Referring to the drawings, in the coil component  100 C according to the other exemplary embodiment, a coil portion  20  may further include a third coil layer  23  in which first to third conductors  23   a ,  23   b , and  23   c  each having a planar spiral shape are stacked, a fourth coil layer  24  in which first to third conductors  24   a ,  24   b , and  24   c  each having a planar spiral shape are stacked, a second bump  32  disposed between the third and fourth coil layers  23  and  24  to electrically connect the third and fourth coil layers  23  and  24  to each other, and a third bump  33  disposed between the first and third coil layers  21  and  23  to electrically connect the first and third coil layers  21  and  23  to each other. In addition, the coil portion  20  may further include a second resin layer  42  in which the first conductor  23   a  of the third coil layer  23  and the first conductor  24   a  of the fourth coil layer  24  are embedded, a third resin layer  43  in which the second conductor  21   b  of the first coil layer  21  and the second conductor  23   b  of the third coil layer  23  are embedded, a third insulating layer  53  disposed between the first and second conductors  23   a  and  23   b  of the third coil layer  23 , and a fourth insulating layer  54  disposed between the first and second conductors  24   a  and  24   b  of the fourth coil layer  24 . First and second insulating films  61  and  62  may cover a surface of the second conductor  21   b  of the first coil layer  21  and a surface of the second conductor  24   b  of the fourth coil layer  24 , respectively. 
     The third and fourth coil layers  23  and  24  may also have a form in which the first to third conductors  23   a ,  24   a ,  23   b ,  24   b ,  23   c , and  24   c  having a planar spiral shape are stacked, similar to the first and second coil layers  21  and  22 , and detailed contents of the third and fourth coil layers  23  and  24  may be the same as those of the first and second coil layers  21  and  22 . The first to fourth coil layers  21  to  24  may be electrically connected to each other through the first to third bumps  31  to  33 , thereby forming a single coil of which turns are increased in the horizontal and vertical directions. The coil may include more coil layers  21  to  24 , such that greater inductance may be implemented. 
     The second and third bumps  32  and  33  may also be formed by electroplating, paste printing, or the like, similar to the first bump  31 , and materials of the second and third bumps  32  and  33  may be, for example, tin (Sn)/copper (Cu), tin (Sn)-sliver (Ag)/copper (Cu), copper (Cu) coated with silver (Ag)/tin (Sn), copper (Cu)/tin (Sn)-bismuth (Bi), or the like, but is not limited thereto. The second and third bumps  32  and  33  may also include an intermetallic compound (IMC). The intermetallic compound (IMC) may be formed in a high temperature vacuum pressing process among processes of manufacturing the coil component  100 C. The intermetallic compound (IMC) may increase interlayer connection strength and decrease conduction resistance to enable a smooth flow of electrons. The second bump  32  may penetrate through the second resin layer  42  between the first conductor  23   a  of the third coil layer  23  and the first conductor  24   a  of the fourth coil layer  24 , and the third bump  33  may penetrate through the third resin layer  43  between the second conductor  21   b  of the first coil layer  21  and the second conductor  23   b  of the third coil layer  23 . 
     A known insulating material may be used as a material of each of the second and third resin layers  42  and  43 , and a photoimageable dielectric (PID) may be used as the material of each of the second and third resin layers  42  and  43 , if necessary. However, the material of each of the second and third resin layers  42  and  43  is not limited thereto. A magnetic film, for example, a curable insulating material containing a magnetic filler may also be used as the material of each of the second and third resin layers  42  and  43 , if necessary. In this case, magnetic density of the coil component  100 C may be increased. The second and third resin layers  42  and  43  may have a thickness greater than those of the first to fourth insulating layers  51  to  54 . 
     The third and fourth coil layers  23  and  24  in which the plurality of conductors  23   a ,  23   b ,  23   c ,  24   a ,  24   b , and  24   c  having the planar spiral shape are stacked may be formed on both sides of the third and fourth insulating layers  53  and  54 , respectively, by applying anisotropic plating technology. Therefore, the third and fourth coil layers  23  and  24  may be implemented to have a cross-sectional shape having a high aspect ratio (AR), such as a substantially dumbbell shape, without a defect such as a short-circuit, or the like. A known insulating material may be used as materials of the third and fourth insulating layers  53  and  54 . Particularly, a photoimageable dielectric (PID) may be used as the materials of the third and fourth insulating layers  53  and  54 . However, the materials of the third and fourth insulating layers  53  and  54  are not limited thereto. The third conductors  23   c  and  24   c  of the third and fourth coil layers  23  and  24  may penetrate through the third and fourth insulating layers  53  and  54 , respectively. In a case in which the photoimageable dielectric (PID) is used as the materials of the third and fourth insulating layers  53  and  54 , patterns having a planar spiral shape for forming the third conductors  23   c  and  24   c  of the third and fourth coil layers  23  and  24  may be formed by a known exposure and development method, that is, a photolithography method. Therefore, the patterns may be more easily and accurately formed. The third conductor  23   c  of the third coil layer  23  may penetrate through the third insulating layer  53 , and the third conductor  23   d  of the fourth coil layer  24  may penetrate through the fourth insulating layer  54 . 
       FIGS. 26 through 41  are schematic views illustrating an exemplary process of manufacturing the coil component of  FIG. 24 . 
     Hereinafter, a method of manufacturing a coil component according to another exemplary embodiment in the present disclosure will be described, but descriptions of contents overlapping the contents described above will be omitted and contents different from the contents described above will mainly be described. 
     Referring to  FIG. 26 , a substrate  200  may first be prepared. Next, the first and second insulating layers  51  and  52  may be formed, respectively, on second metal layers  204  and  205  disposed on both sides of the substrate  200 . Next, patterns  51 P and  52 P having a planar spiral shape may be formed on the first and second insulating layers  51  and  52 , respectively. 
     Referring to  FIG. 27 , dry films  210  and  220  may be formed on the first and second insulating layers  51  and  52 , respectively. Next, dams  210 P and  220 P for a plating process, the subsequent process, may be formed in the dry films  210  and  220 , respectively, using a known photolithography method. Next, first plating layers  21 A and  22 A may be formed, respectively, on the second metal layers  204  and  205  exposed through the patterns formed on the first and second insulating layers  51  and  52  and having the planar spiral shape and disposed on both sides of the substrate  200 . 
     Referring to  FIG. 28 , the dry films  210  and  220  may be stripped. Next, resin layers  41   a  and  41   b  may be formed on the first plating layers  21 A and  22 A, respectively. Next, vias  41   ah  and  41   bh  connected to the first plating layers  21 A and  22 A may be formed in the resin layers  41   a  and  41   b , respectively. 
     Referring to  FIG. 29 , a first bump  31  may be formed in at least one of the vias  41   ah  and  41   bh  formed in the resin layers  41   a  and  41   b . Next, black masks  230  and  240  may be formed on the resin layers  41   a  and  41   b , respectively, in order to protect the first bump  31 . Next, the second metal layers  204  and  205  may be separated from the support member  201 . 
     Referring to  FIG. 30 , the respective resin layers  41   a  and  41   b  may be matched with each other and stacked so that the vias  41   ah  and  41   bh  formed in the respective resin layers  41   a  and  41   b  are connected to each other. Next, the second metal layers  204  and  205  remaining on the first and second insulating layers  51  and  52  may be removed. Next, dry films  250  and  260  may be formed on portions from which the second metal layers  204  and  205  have been removed. 
     Referring to  FIG. 31 , dams  250 P and  260 P for a plating process, the subsequent process, may be formed in the dry films  250  and  260 , respectively, by a known photolithography method. Next, second plating layers  21 B and  22 B may be formed, respectively, on the third conductors  21   c  and  22   c  of the first plating layers  21 A and  22 A exposed through the dams  250 P and  260 P. Next, the dry films  250  and  260  may be stripped. 
     Referring to  FIG. 32 , a substrate  200 ′ may be prepared. Next, third and fourth insulating layers  53  and  54  may be formed, respectively, on second metal layers  204 ′ and  205 ′ disposed on first plating layers  202 ′ and  203 ′ on both sides of a support member  201 ′ of the substrate  200 ′. The third and fourth insulating layers  53  and  54  may be formed by a method of laminating the above-mentioned insulating material such as the photoimageable dielectric (PID) at a predetermined thickness such as about 10 μm to 20 μm. Next, patterns  53 P and  54 P having a planar spiral shape may be formed on the third and fourth insulating layers  53  and  54 , respectively. In a case in which the materials of the third and fourth insulating layers  53  and  54  are the photoimageable dielectric (PID), the patterns  53 P and  54 P having the planar spiral shape may be formed by a known photolithography method, that is, processes such as exposure, development, drying, and the like. When the patterns  53 P and  54 P having the planar spiral shape are formed, the second metal layers  204 ′ and  205 ′ disposed on both sides of the substrate  200 ′ may be externally exposed so as to be used as seed layers in a plating process, the subsequent process. 
     Referring to  FIG. 33 , dry films  210 ′ and  220 ′ may be formed on the third and fourth insulating layers  53  and  54 , respectively. Next, dams  210 ′P and  220 ′P for a plating process, the subsequent process, may be formed in the dry films  210 ′ and  220 ′, respectively, by a known photolithography method. Next, first plating layers  23 A and  24 A may be formed, respectively, on the second metal layers  204 ′ and  205 ′ exposed through patterns formed on the third and fourth insulating layers  53  and  54  and having a planar spiral shape and disposed on both sides of the substrate  200 ′. The first plating layers  23 A and  24 A may be formed by a known plating method such as anisotropic electroplating using the exposed second metal layers  204 ′ and  205 ′ as seed layers. The first plating layers  23 A and  24 A may include the third conductors  23   c  and  24   c  filling the patterns formed on the third and fourth insulating layers  53  and  54  and having the planar spiral shape and the first conductors  23   a  and  24   a  formed on the third conductors  23   c  and  24   c , respectively, and a boundary may not be particularly present between the first conductors  23   a  and  24   a  and the third conductors  23   c  and  24   c . Line widths of the first conductors  23   a  and  24   a  of the first plating layers  23 A and  24 A may be approximately 80 μm to 120 μm, thicknesses of the first conductors  23   a  and  24   a  of the first plating layers  23 A and  24 A may be approximately 80 μm to 120 μm, intervals between lines of the first conductors  23   a  and  24   a  of the first plating layers  23 A and  24 A may be approximately 2 μm to 5 μm, and aspect ratios of patterns of the first conductors  23   a  and  24   a  of the first plating layers  23 A and  24 A may be about 0.8 to 1.5, but are not limited thereto. 
     Referring to  FIG. 34 , the dry films  210 ′ and  220 ′ may be stripped. Next, resin layers  42   a  and  42   b  may be formed on the first plating layers  23 A and  24 A, respectively. The resin layers  42   a  and  42   b  may embed the first conductors  23   a  and  24   a  of the first plating layers  23 A and  24 A, respectively, therein. The resin layers  42   a  and  42   b  may also be formed by a method of laminating an insulating material such as a photoimageable dielectric (PID) at a predetermined thickness such as about 80 μm to 150 μm. Alternatively, the resin layers  42   a  and  42   b  may also be formed by a method of laminating a magnetic film having a predetermined thickness such as about 80 μm to 150 μm, for example, a curable film containing a magnetic filler. Next, vias  42   ah  and  42   bh  connected to the first plating layers  23 A and  24 A may be formed in the resin layers  42   a  and  42   b , respectively. The vias  42   ah  and  42   bh  may be formed by a known photolithography method in a case in which the resin layers  42   a  and  42   b  include the photoimageable dielectric (PID), and may be formed by a known laser drilling method, or the like, in a case in which the resin layers  42   a  and  42   b  include a curable insulating material. 
     Referring to  FIG. 35 , the second bump  32  may be formed in at least one of the vias  42   ah  and  42   bh  formed in the resin layers  42   a  and  42   b . The second bump  32  may be formed by a known method such as electroplating, paste printing, or the like. Meanwhile, the second bump  32  may protrude from a surface of the resin layer  42   a  or  42   b , and a thickness of the second bump  32  protruding from the surface of the resin layer  42   a  or  42   b  may be approximately 5 μm to 10 μm. Next, black masks  230 ′ and  240 ′ may be formed on the resin layers  42   a  and  42   b , respectively, in order to protect the second bump  32 . Next, the second metal layers  204 ′ and  205 ′ may be separated from the support member  201 ′. 
     Referring to  FIG. 36 , the respective resin layers  42   a  and  42   b  may be matched with each other and stacked so that the vias  42   ah  and  42   bh  formed in the respective resin layers  42   a  and  42   b  are connected to each other. In this case, the second bump  32  formed in any one of the vias  42   ah  and  42   bh  may also be disposed in the other of the vias  42   ah  and  42   bh , such that the respective first plating layers  23 A and  24 A may be electrically connected to each other through the second bump  32 . The respective resin layers  42   a  and  42   b  may adhere to each other by high-temperature compression to form the second resin layer  42 . In this case, the intermetallic compound (IMC) may be formed between the second bump  32  and the first plating layers  23 A and  24 A. As a result, interlayer connection strength may be increased, and conduction resistance may be reduced, thereby enabling a smooth flow of electrons. Next, the second metal layers  204 ′ and  205 ′ remaining on the third and fourth insulating layers  53  and  54  may be removed. Next, dry films  250 ′ and  260 ′ may be formed on portions from which the second metal layers  204 ′ and  205 ′ have been removed. 
     Referring to  FIG. 37 , dams  250 ′P and  260 ′P for a plating process, the subsequent process, may be formed in the dry films  250 ′ and  260 ′, respectively, by a known photolithography method. Next, second plating layers  23 B and  24 B may be formed, respectively, on the third conductors  23   c  and  24   c  of the first plating layers  23 A and  24 A exposed through the dams  250 ′P and  260 ′P. The second plating layers  23 B and  24 B may be formed by a known plating method such as anisotropic electroplating using the exposed third conductors  23   c  and  24   c  of the first plating layers  23 A and  24 A as seed layers. The second plating layers  23 B and  24 B may include the second conductors  23   b  and  24   b , respectively, and a boundary may also be present between the second conductors  23   b  and  24   b  and the third conductors  23   c  and  24   c . Line widths of the second conductors  23   b  and  24   b  of the second plating layers  23 B and  24 B may be approximately 80 μm to 120 μm, thicknesses of the second conductors  23   b  and  24   b  of the second plating layers  23 B and  24 B may be approximately 80 μm to 120 μm, intervals between lines of the second conductors  23   b  and  24   b  of the second plating layers  23 B and  24 B may be approximately 2 μm to 5 μm, and aspect ratios of patterns of the second conductors  23   b  and  24   b  of the second plating layers  23 B and  24 B may be about 0.8 to 1.5, but are not limited thereto. The first and second plating layers  23 A,  24 A,  23 B, and  24 B may be connected to each other to form the third and fourth coil layers  23  and  24 , respectively. Next, the dry films  250 ′ and  260 ′ may be stripped. 
     Referring to  FIG. 38 , a resin layer  43   a  embedding the second conductor  21   b  of the first coil layer  21  therein may be formed on the first insulating layer  51 . In addition, a resin layer  43   b  embedding the second conductor  23   b  of the third coil layer  23  therein may be formed on the third insulating layer  53 . The resin layers  43   a  and  43   b  may also be formed by a method of laminating an insulating material such as a photoimageable dielectric (PID) at a predetermined thickness such as about 80 μm to 150 μm. Alternatively, the resin layers  43   a  and  43   b  may also be formed by a method of laminating a magnetic film having a predetermined thickness such as about 80 μm to 150 μm, for example, a curable film containing a magnetic filler. Next, vias  43   ah  and  43   bh  connected to the second plating layers  21 B and  23 B may be formed in the resin layers  43   a  and  43   b , respectively. The vias  42   ah  and  42   bh  may be formed by a known photolithography method in a case in which the resin layers  43   a  and  43   b  include the photoimageable dielectric (PID), and be formed by a known laser drilling method, or the like, in a case in which the resin layers  43   a  and  43   b  include a curable insulating material. 
     Referring to  FIG. 39 , a third bump  33  may be formed in at least one of the vias  43   ah  and  43   bh  formed in the resin layers  43   a  and  43   b . The third bump  33  may be formed by a known method such as electroplating, paste printing, or the like. Meanwhile, the third bump  33  may protrude from a surface of the resin layer  43   a  or  43   b , and a thickness of the third bump  33  protruding from the surface of the resin layer  43   a  or  43   b  may be approximately 5 μm to 10 μm. Next, the respective resin layers  43   a  and  43   b  may be matched with each other and stacked so that the vias  43   ah  and  43   bh  formed in the respective resin layers  43   a  and  43   b  are connected to each other. In this case, the third bump  33  formed in any one of the vias  43   ah  and  43   bh  may also be disposed in the other of the vias  43   ah  and  43   bh , such that the respective second plating layers  21 B and  23 B may be electrically connected to each other through the third bump  33 . The respective resin layers  43   a  and  43   b  may adhere to each other by high-temperature compression to form the third resin layer  43 . In this case, the intermetallic compound (IMC) may be formed between the third bump  33  and the second plating layers  21 B and  23 B. As a result, interlayer connection strength may be increased, and conduction resistance may be reduced, thereby enabling a smooth flow of electrons. 
     Referring to  FIG. 40 , a through-hole penetrating through central portions of the first to third resin layers  41  to  43  and the first to fourth insulating layers  51  to  54  may be formed. A region in which the through-hole is formed may be a core region  20   c  of the coil portion  20 . Next, the first and second insulating films  61  and  62  covering, respectively, surfaces of the second conductors  22   b  and  24   b  of the second and fourth coil layers  22  and  24  may be formed. The first and second insulating films  61  and  62  may be formed by a known insulation coating method. The coil portion  20  may be formed through a series of processes. Next, the magnetic material  11  may cover the upper portion and the lower portion of the coil portion  20  and fill the through-hole formed in the central portion. The body portion  10  may be formed through a series of processes. 
     Referring to  FIG. 41 , the body portion  10  may be diced at a desired size and be polished. Next, the first and second electrodes  81  and  82  covering at least the first and second surfaces of the body portion  10  so as to be connected, respectively, to the first and second lead terminals (not denoted by reference numerals) of the coil portion  20  may be formed. The electrode portion  80  may be formed through a series of processes. 
       FIG. 42  is a schematic view illustrating an example of a coil component to which anisotropic plating technology is applied. 
     Referring to the drawing, a coil component to which anisotropic plating technology is applied may be manufactured by forming patterns  21   a ″,  21   b ″,  21   c ″,  22   a ″,  22   b ″, and  22   c ″ having a planar spiral shape on both surfaces of a support member  201 ″ and through-vias (not denoted by reference numerals) in the support member  201 ″ by the anisotropic plating technology, embedding the patterns  21   a ″,  21   b ″,  21   c ″,  22   a ″,  22   b ″, and  22   c ″ and the through-vias using a magnetic material to form a body  10 ″, and forming external electrodes  81 ″ and  82 ″ electrically connected to the patterns  21   a ″,  21   b ″,  21   c ″,  22   a ″,  22   b ″, and  22   c ″ on outer surfaces of the body  10 ″. However, in a case of applying the anisotropic plating technology, a high aspect ratio may be implemented, but uniformity of plating growth may be decreased due to an increase in an aspect ratio, and a dispersion of a plating thickness is wide, such that a short-circuit between patterns may easily occur. In addition, it may be appreciated that a thickness h 3  of the support member  201 ″ is significant, such that there is a restriction in a thickness h d  of magnetic materials disposed on and beneath the patterns  21   a ″,  21   b ″,  21   c ″,  22   a ″,  22   b ″, and  22   c″.    
     As set forth above, according to the exemplary embodiments in the present disclosure, a new coil component in which a problem such as a short-circuit, or the like, occurring at the time of applying anisotropic plating technology according to the related art may be improved, a thickness of a magnetic material covering a coil may be sufficiently secure, and a pattern having a high aspect ratio (AR) may be implemented, and a method of manufacturing the same may be provided. 
     While 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.