Patent Publication Number: US-2023162908-A1

Title: Coil component

Description:
CROSS-REFERENCE TO RELATED APPLICATION(S) 
     This application is the continuation application of U.S. Pat. Application No. 16/673,328 filed on Nov. 4, 2019, which claims benefit of priority to Korean Patent Application No. 10-2019-0079989 filed on Jul. 3, 2019 in the Korean Intellectual Property Office, the disclosures of which are incorporated herein by reference in their entirety. 
    
    
     BACKGROUND 
     The present disclosure relates to a coil component. 
     An example of a coil component is a wire-wound coil component using a magnetic mold and a wire-wound coil. In the case of the wire-wound coil component, a wire-wound coil in which a metal wire having a coating layer formed on a surface thereof is wound in a coil shape is used. 
     In forming a magnetic body covering the winding coil, the coating layer of the winding coil may be damaged by a magnetic powder contained in a material for forming the magnetic body. If the magnetic powder has conductivity, a short-circuit may occur between the winding coil and the magnetic body. 
     SUMMARY 
     An aspect of the present disclosure is to provide a coil component that can prevent a coating layer and a molded portion from being damaged due to pressure at the time of forming a body. 
     Another aspect of the present disclosure is to provide a coil component that can prevent a short-circuit between a body and a winding coil. 
     According to an aspect of the present disclosure, there is provided a coil component. The coil component includes a body having a molded portion and a cover portion disposed on one surface of the molded portion, and including magnetic metal powder; a winding coil disposed on one surface of the molded portion and the cover portion and embedded in the body, and including a coating layer surrounding a surface of each of a plurality of turns; and a first protective film disposed between the one surface of the molded portion and the cover portion and between at least a portion of the surface of the winding coil and the cover portion. 
    
    
     
       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 perspective view illustrating a coil component according to an embodiment of the present disclosure; 
         FIG.  2    is a schematic view illustrating the molded portion of  FIG.  1   ; 
         FIG.  3    is a view illustrating a cross-section taken along line I-I′ of  FIG.  1   ; 
         FIG.  4    is a schematic view illustrating a modified example of a coil component according to an embodiment of the present disclosure, and is a view corresponding to the cross-section taken along line I-I′ of  FIG.  1   ; 
         FIG.  5    is a schematic view illustrating a coil component according to another embodiment of the present disclosure, and is a view corresponding to the cross-section taken along line I-I′ of  FIG.  1   ; and 
         FIG.  6    is a schematic view illustrating a modified example of a coil component according to another embodiment of the present disclosure, and is a view corresponding to the cross-section taken along line I-I′ of  FIG.  1   . 
     
    
    
     DETAILED DESCRIPTION 
     Hereinafter, embodiments of the present disclosure will be described as follows with reference to the attached drawings. The terms used in the exemplary embodiments are used to simply describe an exemplary embodiment, and are not intended to limit the present disclosure. 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 term “disposed on,” “positioned on,” and the like, may indicate that an element is positioned on or beneath an object, and does not necessarily mean that the element is positioned on the object with reference to a gravity direction. 
     The term “coupled to,” “combined to,” and the like, may not only indicate that elements are directly and physically in contact with each other, but also include the configuration in which the other element is interposed between the elements such that the elements are also in contact with the other component. 
     Sizes and thicknesses of elements illustrated in the drawings are indicated as examples for ease of description, and exemplary embodiments in the present disclosure are not limited thereto. 
     In the drawings, an L direction is a first direction or a length direction, a W direction is a second direction or a width direction, a T direction is a third direction or a thickness direction. 
     In the descriptions described with reference to the accompanied drawings, the same elements or elements corresponding to each other will be described using the same reference numerals, and overlapped descriptions will not be repeated. 
     Embodiment and a Modified Example 
     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, or the like. 
     In other words, in electronic devices, a coil component may be used as a power inductor, a high frequency (HF) inductor, a general bead, a high frequency (GHz) bead, a common mode filter, and the like. 
       FIG.  1    is a schematic perspective view illustrating a coil component according to an embodiment of the present disclosure.  FIG.  2    is a schematic view illustrating the molded portion of  FIG.  1   .  FIG.  3    is a view illustrating a cross-section taken along line I-I′ of  FIG.  1   . 
     Referring to  FIGS.  1  to  3   , a coil component  1000  according to an embodiment of the present disclosure may include a body  100 , a winding coil  200 , and a first protective film  310 , and may include an insulating layer  400  and external electrodes  510  and  520 . 
     The body  100  may form an exterior of the coil component  1000  according to the present embodiment, and may embed the winding coil  200  therein. 
     For example, the body  100  may have a hexahedral shape as a whole. 
     Referring to  FIG.  1   , the body  100  includes a first surface  101  and a second surface  102 , opposing each other in a length direction L, a third surface  103  and a fourth surface  104 , opposing each other in a width direction W, and a fifth surface  105  and a sixth surface  106 , opposing each other in a thickness direction T. Each of the first to fourth surfaces  101 ,  102 ,  103 , and  104  of the body  100  may correspond to a wall surface of the body  100  connecting the fifth surface  105  and the sixth surface  106  of the body  100 . In the description below, both end surfaces of the body  100   may refer to the first surface  101  and the second surface  102  of the body, both side surfaces of the body  100  may refer to the third surface  103  and the fourth surface  104  of the body  100 , and one surface and the other surface of the body  100  may refer to the sixth surface  106  and the fifth surface  105  of the body  100 , respectively. 
     The body  100  may be formed such that the coil component  1000  according to the present embodiment in which external electrodes  510  and  520  to be described later is formed to have a length of 2.0 mm, a width of 1.2 mm, and a thickness of 0.65 mm, but is not limited thereto. 
     The body  100  may include a molded portion  110  and a cover portion  120  disposed on one surface of the molded portion  110 , and may further include a core portion  130 . Referring to  FIGS.  1  and  3   , side surfaces of the molded portion  110  and the cover portion  120  may constitute first to fifth surfaces  101 ,  102 ,  103 ,  104 , and  105  of the body  100 , and the other surface (a lower surface of the molded portion  110  based on directions of  FIGS.  1  and  3   ) may constitute the sixth surface  106  of the body  100 . Hereinafter, the other surface of the molded portion  110  may be the same as the sixth surface of the body  100 . 
     The molded portion  110  has one surface and the other surface facing each other. The molded portion  110  supports a winding coil  200  to be described later, disposed on one surface of the molded portion  110 . A core portion  130  may protrude from one surface of the molded portion  110 , and the core portion  130  may be disposed at a central portion of one surface of the molded portion  110  to penetrate through the winding coil  200 . 
     The cover portion  120  covers the winding coil  200  to be described later together with the molded portion  110 . The cover portion  120  may be disposed on the molded portion  110  and the winding coil  200  and then pressed to be coupled to the molded portion  110 . 
     The body  100  includes a magnetic material. That is, at least one of the molded portion  110 , the cover portion  120 , or the core portion  130  includes a magnetic material. Hereinafter, although it will be described as a configuration that the molded portion  110 , the cover portion  120 , and the core portion  130  all include a magnetic material, but the scope of the present disclosure is not limited thereto. 
     As an example, the molded portion  110  may be formed by filling a magnetic material into a mold for forming the molded portion  110 . As another example, the molded portion  110  may be formed by filling a composite material including a magnetic material and an insulating resin in a mold. A process of applying a high-temperature and a high-pressure to the magnetic material or the composite material in the mold may be additionally performed, but the present disclosure is not limited thereto. The molded portion  110 , as a base from which the core portion  130  extends, and the core portion  130  may be integrally formed by the above-described mold and thus a boundary therebetween may not be formed. The cover portion  120  may be formed by disposing a magnetic composite sheet in which a magnetic material is dispersed in an insulating resin on the molded portion  110  and the winding coil  200 , followed by heating and pressing. 
     The magnetic material may be ferrite or magnetic metal powder  10 . 
     The ferrite powder may include, for example, at least one or more materials among a spinel ferrite such as an Mg-Zn ferrite, an Mn-Zn ferrite, an Mn-Mg ferrite, a Cu-Zn ferrite, an Mg-Mn-Sr ferrite, an Ni-Zn ferrite, and the like, a hexagonal ferrite such as a Ba-Zn ferrite, a Ba-Mg ferrite, a Ba-Ni ferrite, a Ba-Co ferrite, a Ba-Ni-Co ferrite, and the like, a garnet ferrite such as a Y ferrite, and a Li ferrite. 
     The magnetic metal powder  10  may include one or more elements selected from a group consisting of iron (Fe), silicon (Si), chromium (Cr), cobalt (Co), molybdenum (Mo), aluminum (Al), niobium (Nb), copper (Cu), and nickel (Ni). For example, the magnetic metal powder may be at least one or more among a pure iron powder, a Fe-Si alloy powder, a Fe-Si-Al alloy powder, a Fe-Ni alloy powder, a Fe-Ni-Mo alloy powder, a Fe-Ni-Mo-Cu alloy powder, a Fe-Co alloy powder, a Fe-Ni-Co alloy powder, a Fe-Cr alloy powder, a Fe-Cr-Si alloy powder, a Fe-Si-Cu-Nb alloy powder, a Fe-Ni-Cr alloy powder, and a Fe-Cr-Al alloy powder. 
     Hereinafter, a case in which the magnetic material is the magnetic metal powder  10  will be described, but the scope of the present disclosure is not limited thereto as described above. 
     The magnetic metal powder  10  may be amorphous or crystalline. For example, the magnetic metal powder  10  may be a Fe-Si-B-Cr amorphous alloy powder, but is not necessarily limited thereto. The magnetic metal powder  10  may have an average diameter of about 0.1 µm to 30 µm, but is not limited thereto. Although not shown, an insulating film may be formed on the surface of the magnetic metal powder  10 . The insulating film may include epoxy, polyimide, a liquid crystal polymer, or the like, alone or in combination thereof, but is not limited thereto. 
     At least one of the molded portion  110 , the cover portion  120 , or the core portion  130  may include two or more magnetic metal powder  10 . Here, the fact that the magnetic metal powder  10  has different types means that the magnetic metal powder  10  is distinguished from any one of an average diameter, a composition, crystallinity, and a form. 
     The insulating resin may be include an epoxy, a polyimide, a liquid crystal polymer, or the like, alone or in combination thereof, but is not limited thereto. 
     The winding coil  200  exhibits characteristics of the coil component  1000 . For example, when the coil component  1000  of the present embodiment is used as a power inductor, the winding coil  200  may serve to stabilize power supply of an electronic device by storing an electric field as a magnetic field and maintaining an output voltage. 
     The winding coil  200  is embedded in the body  100 . Specifically, the winding coil  200  is disposed between one surface of the molded portion  110  and the cover portion  120  such that the winding coil  200  is embedded in the body  100 . The winding coil  200  is an air core coil, and when the core portion  130  is formed in the molded portion  110 , the core portion  130  is disposed in the air core of the winding coil  200 . When the core portion  130  is not formed in the molded portion  110 , a magnetic composite sheet for forming the cover portion  120  may fill the air core of the winding coil  200 . 
     The winding coil  200  includes a coating layer IF surrounding the surface of each of a plurality of turns. The winding coil  200  forms an innermost turn, at least one middle turn, and an outermost turn, in a direction outward of a central portion of one surface of the molded portion  110 . The winding coil  200  is formed by spirally winding a metal wire such as a copper wire (Cu-wire) in which a surface thereof is coated with the coating layer IF. Therefore, the coating layer IF surrounds the surface of each turn of the winding coil  200 . In addition, the winding coil  200  has an upper surface and a lower surface similar to a ring shape as a whole, and an inner side surface and an outer side surface connecting the upper surface and the lower surface. The coating layer IF may include an epoxy, a polyimide, a liquid crystal polymer, or the like, alone or in combination thereof, but is not limited thereto. 
     The lead-out portions  210  and  220  are exposed on the other surface of the molded portion  110 , respectively, to be spaced apart from each other, as both end portions of the winding coil  200 . The lead-out portions  210  and  220  may have a shape extending along a width direction W from the other surface of the molded portion  110 . The lead-out portions  210   and  220  may be disposed to be spaced apart from each other along a length direction L of the body  100  from the other surface  106  of the molded portion  110 . The lead-out portions  210  and  220  may remain after the winding coil  200  is formed of a metal wire such as a copper wire, and the surfaces thereof are coated with a coating layer IF. As a result, a boundary between the lead-out portions  210  and  220  and the winding coil  200  may not be formed. In addition, like the winding coil  200 , a coating layer IF is formed on the surface of the lead-out portions  210  and  220 . Meanwhile, a portion of the coating layers IF of the lead-out portions  210  and  220  may be removed for connection between the lead-out portions  210  and  220  and external electrodes  510  and  502  to be described later. 
     The lead-out portions  210  and  220  are exposed to the sixth surface  106  of the body  100 . As an example, as illustrated in  FIGS.  2  and  3   , grooves R and R′ are formed along a side surface of the molded portion  110  and the other surface of the molded portion  110  in the molded portion  100 , and the lead-out portions  210  and  220  are disposed in the grooves R and R′, respectively. The grooves R and R′ are formed in a shape corresponding to the lead-out portions  210  and  220 . Meanwhile, the grooves R and R′ are formed in a process of forming the molded portion  110  with a mold or may be formed in the molded portion  110  in a process of pressing the cover portion  120 . As another example, the lead-out portions  210  and  220  may penetrate through the molded portion  110  and exposed to the other surface of the molded portion  110 . 
     A first protective film  310  prevents the coating layer IF of the winding coil  200  from being damaged by the magnetic metal powder  10  when the cover portion  130  is formed, and as a result, the first protective film  310  prevents a short-circuit between the winding coil  200  and the body  100 . Further, the first protective film  310  may prevent the molded portion  110  from being damaged by the magnetic metal powder  10  when the cover portion  130  is formed. 
     The first protective film  310  may be a ceramic material including at least one of alumina (Al 2 O 3 ) or silica (SiO 2 ) . When the first protective film  310  is formed of a polymer material, strength of the first protective film  310  may be lower than that of the first protective film  310  of the ceramic material due to characteristics of the material. Therefore, in the present embodiment, the first protective film  310  is formed of a ceramic material, and even if pressure is applied when the cover portion  130  is formed, damages to the coating layer IF and the molded portion  110  may be more reliably prevented. In addition, since higher pressure may be applied when the cover portion  130  is formed, it is possible to improve a charging rate of a magnetic material of the body  100 . 
     The first protective film  310  is disposed between one surface of the molded portion  110  and the cover portion  120  and between at least a portion of the surface of the winding coil  200  and the cover portion  120 . The first protective film  310  is formed by disposing the winding coil  200  on one surface of the molded portion  110 , and then forming the first protective film  310  in the molded portion  110 . After the first protective film  310  is formed, a cover portion  120  is formed. Therefore, the first protective film  310  is disposed between one surface of the molded portion  110  and the cover portion  120 . In addition, the first protective film  310  is disposed at least a portion of the surface of the winding coil  200  and the cover portion  120 . More specifically, the first protective film  310  is disposed between an upper surface of the winding coil  200  and the cover portion  120 , and is disposed between an outer side surface of the winding coil  200  and the cover portion  120 . When a core portion  130  is formed together with the molded portion  110 , the first protective film  310  is disposed between the core portion  130  and the cover portion  120  and extends between the core portion  130  and the cover portion  120 . Meanwhile, when a spaced space is formed between the inner side surface of the winding coil  200  and the core portion  130 , the first protective film  310  may be disposed in the space. In a case in which the core portion  130  extends above the winding coil  200  (e.g., an upper surface of the core portion  130  is above an upper surface of the winding coil  200 ), the first protective film  310  may extend to cover portions of side surfaces of the core portion  130  above the winding coil  200 . In a case in which the core portion  130  is below the winding coil  200  (e.g., an upper surface of the core portion  130  is below an upper surface of the winding coil  200 ), the first protective film  310  may extend to cover portions of inner side surfaces of the winding coil  200  above the core portion  130 . 
     The first protective film  310  may be formed by laminating a film for forming a first protective film or the like on the molded portion  110  on which the winding coil  200  is disposed or may be formed by depositing a material for constituting the first protective film  310  to the molded portion  110  on which the winding coil  200  is disposed by using a vapor deposition method such as sputtering or an atomic layer deposition (ALD), or the like. When the first protective film  310  is formed by vapor deposition such as sputtering or the like, the first protective film  310  may be formed in a form of a conformal film along one surface of the molded portion  110  on which the winding coil  200  is disposed. That is, one surface of the molded portion includes a first region on which the winding coil  200  is disposed and a second region on which the winding coil  200  is not disposed, outside of the first region. The first protective film  310  may be formed in a relatively uniform and thin thickness along the second region of one surface of the molded portion  110 , the outer side surface of the winding coil  200 , and the surface of the upper surface of the winding coil  200 . 
     The first protective film  310  is exposed to a side surface of the body  100 , and the exposed surface of the first protective film  310  is disposed substantially in the same plane as the side surface of the body  100 . As an example, as illustrated in  FIG.  3   , the first protective film  310  is exposed to first and second surfaces  101  and  102  of the body  100 . The first protective film  310  is disposed substantially in the same plane as the first and second surfaces  101  and  102  of the body  100  formed by the side surface of the molded portion  110  and the side surface of the cover portion  120 , respectively. The first protective film  310  is formed on an entire outer portion of one surface of the molded portion  100  on which the winding coil  200  is not disposed. Therefore, as an example, the exposed surface of the first protective film  310  is formed in a form extending to both end portions of the first surface  101  of the body  100  in the width direction W, with respect to the first surface  101  of the body  100 . As a result, with reference to the first surface  101  of the body  100 , the exposed surface of the first protective film  310  separates the side surface of the molded portion  100  and the side surface of the cover portion  120  from each other. Meanwhile, the above-description is applied equally to the second surface  102  and the fourth surface  104  of the body  100 , and the above-description is also applied equally to the third surface  103  not including portions in which the grooves R and R′ are formed. 
     An insulating layer  400  surrounds the first to sixth surfaces  101 ,  102 ,  103 ,  104 ,  105 , and  106  of the body  100 . Openings O and O′ respectively expose portions of the lead-out portions  210  and  220 . The external electrodes  510  and  520  are formed in the openings O and O′ of the insulating layer  400 . The insulating layer  400  disposed on each of the first to sixth surfaces  101 ,  102 ,  103 ,  104 ,  105 , and  106  may be formed in the same process and the same material, so a boundary therebetween may not be formed, but the present disclosure is not limited thereto. In another example, the insulating layer  400  formed on the first to fourth surfaces  101 ,  102 ,  103 , and  104  of the body  100  and the insulating layer  400  formed on the sixth surface  106  of the body  100  may be formed in different processes, so a boundary therebetween may be formed. 
     The insulating layer  400  may be formed by printing an insulating paste on the first to sixth surfaces  101 ,  102 ,  103 ,  104 ,  105 , and  106  of the body  100 , applying an insulating resin, or laminating an insulating film including the insulating resin. The insulating resin may include epoxy, polyimide, a liquid crystal polymer, or the like along in mixture thereof, but is not limited thereto. 
     Openings O and O′ are disposed in the insulating layer  400  to expose a portion of the lead-out portions  210  and  220 . As described above, since the lead-out portions  210  and  220  are disposed on the sixth surface  106  of the body  100  to be spaced apart from each other, the openings O and O′ may be formed in a shape extending in a width direction W of the body  100  in a region disposed on the sixth surface  106  of the body  100  of the insulating layer  400 . External electrodes  510  and  520  to be described later are disposed in the openings O and O′, and the external electrodes  510  and  520  and the lead-out portions  210  and  220  are connected to each other. The openings O and O′ may be formed by removing a portion of the insulating layer  400  to expose a portion of each of the lead-out portions  210  and  220  disposed on the sixth surface  106  of the body  100 . 
     The openings O and O′ may be formed in the insulating layer  400  by a process such as mechanical polishing, laser or sandblasting. It is not easy to selectively remove only a portion of regions in both end portions of the insulating layer  400  in the width direction W by mechanical polishing. Laser or sandblasting can be used to selectively remove only a portion of regions in both end portions in the width direction W of the insulating layer  400 . 
     The external electrodes  510  and  520  are disposed in the openings O and O′ and connected to the lead-out portions  210  and  220 . The external electrodes  510  and  520  are exposed from the insulating layer  400 . Specifically, the first external electrode  510  is disposed in the opening O and connected to the first lead-out portion  210 , and the second external electrode  520  is disposed in the opening O′ and connected to the second lead-out portion  220 . The first and second external electrodes  510  and  520  are disposed to be spaced apart from each other on the sixth surface  106  of the body  100 . 
     The external electrodes  510  and  520  may be formed of a conductive material such as copper (Cu), aluminum (Al), silver (Ag), tin (Sn), gold (Au), nickel (Ni), lead (Pb), chromium (Cr), titanium (Ti), or alloys thereof, but an example of the material is not limited thereto. 
     The first and second external electrodes  510  and  520  may be formed as a single layer or a plurality of layers. As an example, the first external electrode  510  may be comprised of a first layer including copper (Cu), a second layer disposed on the first layer and including nickel (Ni), and a third layer disposed on the second layer and including tin (Si). Each of the first to third layers may be formed by electroplating, but is not limited thereto. Each of the first and second external electrodes  510  and  520  may include a conductive resin layer and an electroplating layer. The conductive resin layer may be formed by applying and curing conductive powder including silver (Ag) and/or copper (Cu) and a conductive paste including an insulating resin such as epoxy. 
     At least a portion of the external electrodes  510  and  520  may extend onto the insulating layer  400 . As an example, when the external electrodes  510  and  520  include a conductive resin layer and an electroplating layer, the conductive resin layer may be formed to fill at least a portion of the openings O and O′, and then the electroplating layer may be formed on the conductive resin layer. In this case, the electroplating layer may be formed on the insulating layer  400  after filling a remaining volume of the openings O and O′ due to plating spread. When at least a portion of the external electrodes  510  and  520  extends and is formed on the insulating layer  400 , exposed areas of the external electrodes  510  and  520  may be increased, such that a coupling force with a solder, or the like during mounting may be increased. 
       FIG.  4    is a view schematically illustrating a modified example of a coil component according to an embodiment of the present disclosure, and a view corresponding to a cross-section taken along line I-I′ of  FIG.  1   . 
     Referring to  FIG.  4   , in the case of a coil component 1000′ according to a present modified example, a first protective film  310  may be extended and disposed on a side surface of a molded portion  110  connected to one surface of the molded portion  110 . Since the first protective film  310  is also disposed on the side surface of the molded portion  110 , the side surface of the molded portion  110  may be prevented from being damaged by pressure applied to the side surface of the molded portion  110  when the cover portion  120  is formed. 
     Another Embodiment and Modified Example 
       FIG.  5    is a view schematically illustrating a coil component according to another embodiment of the present disclosure, and is a view corresponding to a cross-section taken along line I-I′.  FIG.  6    is a view schematically illustrating a modified example of a coil component according to another embodiment of the present disclosure, and is a view corresponding to a cross-section taken along line I-I′ of  FIG.  1   . 
     Referring to  FIGS.  1  to  4    and  FIGS.  5  to  6   , coil components  2000  and  2000 ′ according to the present embodiment and the modified example of the present embodiment may further include a second protective film  320  as compared with the coil components  1000  and  1000 ′ according to an embodiment and a modified example of an embodiment of the present disclosure. Therefore, in describing the present embodiment and the modified example of the present embodiment, only the second protective film  320 , which is different from an embodiment and the modified example of an embodiment of the present disclosure will be described. In the remaining configuration of the present embodiment and the modified example of the present embodiment, description in an embodiment and the modified example of an embodiment of the present disclosure may be applied as it is. 
     Referring to  FIG.  5   , a coil component  2000  according to another embodiment of the present disclosure may further include a second protective film  320  disposed between the first protective film  310  and the winding coil  200  and between the winding coil  200  and the molded portion  110  to cover a surface of the winding coil  200 . 
     The second protective film  320  covers the surface of the winding coil  200 . In the present embodiment, before the winding coil  200  is disposed on one surface of the molded portion  110 , the second protective film  320  surrounding the surface of the winding coil  200  is formed, and the winding coil  200  on which the second protective film  320  is formed is disposed on the molded portion  110 , and a first protective film  310  is formed on the molded portion  110  on which the winding coil  200  is disposed. Therefore, the second protective film  320  is formed to surround both upper and lower surfaces, and inner side surfaces and outer side surfaces of the winding coil  200 . The winding coil  200  is disposed on a first region of the molded portion  110 . The first protective film  310  is disposed on a second region of the molded portion  110  surrounding the first region, and is disposed on the outer side surface and the upper surface of the winding coil  200  on which the second protective film  320  is formed. 
     The second protective film  320  may be a ceramic material including at least one of alumina (Al 2 O 3 ) or silica (SiO 2 ). When the second protective film  320  is formed of a polymer material, strength of the second protective film  320  may be weaker than that of the second protective film  320  made of a ceramic material due to characteristics of materials. Therefore, in the present embodiment, by forming the second protective film  320  made of a ceramic material, damage to the coating layer IF and the molded portion  110  may be more reliability prevented even when pressure is applied to form the cover portion  130 . In addition, when the cover portion  130  is formed, since high pressure may be applied, a filling rate of a magnetic material of the body  100  may be improved. 
     In the present embodiment, unlike an embodiment of the present disclosure, the second protective film  320  is interposed between one surface of the molded portion  110  and a lower surface of the winding coil  200 , facing one surface of the molded portion  110 . As a result, when the cover portion  120  is formed, the coating layer IF of the winding coil  200  may be prevented from being damaged by pressure applied to the lower surface of the winding coil  200  from one surface of the molded portion  110 . That is, the coating layer IF at the lower surface side of the winding coil  200  may be prevented from being damaged by the magnetic metal powder particle  10  of the molded portion  110 . 
     Referring to  FIG.  6   , in the case of the coil component 2000′ according to a modified example of the present embodiment, the first protective film  310  extend to the side surface of the molded portion  110 . Since it was described in the coil component  1000 ′ according to an embodiment and a modified example of the present disclosure, the description thereof will be omitted. 
     As set forth above, according to the present disclosure, it is possible to prevent the coating layer and the molded portion of the winding coil from being damaged when pressure at the time of forming the body is applied. 
     According to the present disclosure, it is possible to prevent a short-circuit between the body and the winding coil. 
     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.