Coil component

Abstract

The present application provides a coil component capable of improving insulation between external terminals arranged on the same surface of a base. In the coil component, a potential difference is sometimes generated between the external end portions, for example, when a voltage is applied via the external terminal electrodes. In the coil component, the insulation between the external end portions can be improved using the upper insulator exposed at the end surface of the base, and thus, even in the case where a potential difference is generated between the external end portions, the short circuit of the external end portions to each other at the end surface can be suppressed.

Description

TECHNICAL FIELD

[0001] The present application relates to a coil component. BACKGROUND

[0002] Conventionally, a coil component provided with a plurality of coils in a core is known. A 4-terminal coil component provided with 2 coils in a core is disclosed in Patent Literature 1.

[0003] PRIOR ART DOCUMENTS

[0004] PATENT LITERATURE

[0005] Patent Literature 1: Japanese Patent Application Publication No. 2015-130472 SUMMARY

[0006] PROBLEMS TO BE SOLVED BY THE INVENTION

[0007] In the coil component as described above, sometimes a plurality of external terminals are provided on the same surface of the core, and sufficient insulation between the external terminals is required.

[0008] The present inventors have repeatedly studied insulation between external terminals, and have newly found a technique capable of further improving the insulation between external terminals.

[0009] An object of the present application is to provide a coil component capable of improving the insulation between external terminals provided on the same surface of a core.

[0010] MEANS FOR SOLVING THE PROBLEMS

[0011] A coil component according to one aspect of the present application includes: a core composed of a resin containing a metal magnetic powder, having a first end surface and a second end surface parallel to each other; an insulating substrate provided in the core, orthogonal to the first end surface and the second end surface, and extending between the first end surface and the second end surface; a pair of coil portions provided on the insulating substrate, each having a first end portion exposed to the first end surface; a pair of first external terminals provided on the first end surface, each connected to the first end portion of the pair of coil portions; and a first insulating portion exposed to the first end surface from an inside of the core, and positioned on the first end surface between the first end portions of the pair of coil portions.

[0012] In the coil component as described above, the first insulating portion exposed to the first end surface of the core can be used to suppress a case where the first end portions of the pair of coil portions are short-circuited to each other on the first end surface.

[0013] In a coil component according to another aspect of the present application, the first insulating portion is positioned on the first end surface over an entire region of a region sandwiched between the first end portions of the pair of coil portions.

[0014] In the coil component of another aspect of the present application, the first insulating portion and the resin containing the metal magnetic powder are exposed in the region between the first end portions of the pair of coil portions in the first end surface, and the first insulating portion is sandwiched by the resin containing the metal magnetic powder in the direction in which the first end portions of the pair of coil portions are aligned.

[0015] In the coil component of another aspect of the present application, the first insulating portion extends across the first end portions of the pair of coil portions.

[0016] In the coil component of another aspect of the present application, the coil component further includes an insulating layer that covers at least a portion of the region between the first end portions of the pair of coil portions in the first end surface.

[0017] In the coil component of another aspect of the present application, the first external terminal directly covers a portion of the first insulating portion on the first end surface.

[0018] In the coil component of another aspect of the present application, the pair of coil portions each has a second end portion exposed in a second end surface, and the coil component further includes a pair of second external terminals provided on the second end surface and connected to the second end portions of the pair of coil portions, respectively, and a second insulating portion exposed in the second end surface from an inside of the body and positioned between the second end portions of the pair of coil portions on the second end surface.

[0019] Effects of the Invention

[0020] According to the present application, it is possible to provide a coil component in which the insulation between external terminals provided on the same surface of a body can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a schematic perspective view of a coil component of an embodiment.

[0022] Figure 2 is a view showing the inside of the coil component of Figure 1 .

[0023] Figure 3 is an exploded view of the coil shown in Figure 2 .

[0024] Figure 4 is a cross-sectional view of the coil component of Figure 2 along line IV-IV.

[0025] Figure 5 is a cross-sectional view of the coil component of Figure 2 along line V-V.

[0026] Figure 6 is a plan view of the coil shown in Figure 2 .

[0027] Figure 7is a view showing Figure 1 one end surface of the body of the coil member.

[0028] Figure 8 is a view showing Figure 1 the other end surface of the body of the coil member.

[0029] Figure 9 is a view showing a different mode from Figure 7

[0030] Figure 10 is a view showing a different mode from Figure 7 DETAILED DESCRIPTION

[0031] Hereinafter, an embodiment of the present application will be described in detail with reference to the drawings. In the description, the same reference numerals are used for the same elements or elements having the same function, and repetitive description is omitted.

[0032] The coil member 1 of the embodiment is a balun. The balun is usable, for example, when a near field wireless communication circuit (NFC circuit) is mounted on a cellular terminal. By the balun, conversion between an unbalanced signal of an antenna and a balanced signal of the NFC circuit is performed, and connection of an unbalanced circuit and a balanced circuit can be achieved.

[0033] As shown in Figure 1 , the coil member 1 includes a body 10, a coil structure 20 buried in the body 10, and two pairs of external terminal electrodes 60A, 60B, 60C, 60D provided on a surface of the body 10.

[0034] The body 10 has an outer shape of a rectangular parallelepiped, and has six surfaces 10a to 10f. As one example, the body 10 is designed to have dimensions of 2.0 mm in long side, 1.25 mm in short side, and 0.65 mm in height. Among the surfaces 10a to 10f of the body 10, the end surface 10a (first end surface) and the end surface 10b (second end surface) are parallel to each other, the upper surface 10c and the lower surface 10d are parallel to each other, and the side surface 10e and the side surface 10f are parallel to each other. The upper surface 10c of the body 10 is a surface opposite to a mounting surface of a mounting substrate on which the coil member 1 is mounted, in parallel.

[0035] ​​The base material 10 is composed of a resin 12 containing metallic magnetic powder, which is a type of magnetic material. The resin 12 containing metallic magnetic powder is a binder powder obtained by bonding the metallic magnetic powder with an adhesive resin. The metallic magnetic powder in the resin 12 can be, for example, an iron-nickel alloy (permalloy), carbonyl iron, amorphous, amorphous, or crystalline FeSiCr alloys, iron-aluminum-silicon, etc. The adhesive resin is, for example, a thermosetting epoxy resin. In this embodiment, the content of metallic magnetic powder in the binder powder is 80–92 vol% by volume and 95–99 wt% by mass. From the viewpoint of magnetic properties, the content of metallic magnetic powder in the binder powder can also be 85–92 vol% by volume and 97–99 wt% by mass. The magnetic powder in the resin 12 containing metallic magnetic powder can be a powder having a single average particle size or a mixed powder having multiple average particle sizes.

[0036] The resin 12 containing metallic magnetic powder of the base body 10 integrally covers the coil structure 20 described later. Specifically, the resin 12 containing metallic magnetic powder covers the coil structure 20 from top to bottom and covers the outer periphery of the coil structure 20. In addition, the resin 12 containing metallic magnetic powder fills the inner periphery region of the coil structure 20.

[0037] The coil structure 20 includes: an insulating substrate 30; an upper coil structure 40A disposed on the upper side of the insulating substrate 30; and a lower coil structure 40B disposed on the lower side of the insulating substrate 30.

[0038] The insulating substrate 30 is designed to have a flat plate shape, extending between and orthogonal to the end faces 10a and 10b of the substrate 10. Furthermore, the insulating substrate 30 extends parallel to the upper surface 10c and lower surface 10d of the substrate 10. Figure 3 As shown, the insulating substrate 30 has: an elliptical coil forming portion 31 extending along the long side of the substrate 10; and a pair of frame portions 34A, 34B extending along the short side of the substrate 10 and sandwiching the coil forming portion 31 from both sides. An elliptical opening 32 extending along the long side of the substrate 10 is provided in the central portion of the coil forming portion 31.

[0039] The insulating substrate 30 is made of a non-magnetic insulating material. The thickness of the insulating substrate 30 can be designed to be, for example, in the range of 10 to 60 μm. In this embodiment, the insulating substrate 30 has a structure in which an epoxy resin is impregnated in glass cloth. The resin constituting the insulating substrate 30 is not limited to epoxy resin, but can also be BT resin, polyimide, aramid, etc. The constitutive material of the insulating substrate 30 can also be ceramic or glass. The constitutive material of the insulating substrate 30 can also be a mass-produced printed circuit board material. The constitutive material of the insulating substrate 30 can also be a resin material used in BT printed circuit boards, FR4 printed circuit boards, or FR5 printed circuit boards.

[0040] The upper coil structure 40A is provided on the upper surface 30a of the coil forming portion 31 of the insulating substrate 30. For example... Figure 2 , 3 As shown, the upper coil structure 40A includes a first planar coil 41, a second planar coil 42, and an upper insulator 50A. The first planar coil 41 and the second planar coil 42 are wound side by side and adjacent to each other on the upper surface 30a of the insulating substrate 30.

[0041] The first planar coil 41 is a generally oblong helical hollow coil wound on the upper surface 30a of the insulating substrate 30 and within the same layer around the opening 32 of the coil forming portion 31. The first planar coil 41 can have one or more turns. In this embodiment, the first planar coil 41 has 3 to 4 turns. The first planar coil 41 has an outer end portion 41a and an inner end portion 41b. The outer end portion 41a is provided in the frame portion 34A and protrudes from the end face 10a of the body 10. The inner end portion 41b is provided at the edge of the opening 32. On the insulating substrate 30, at a position overlapping with the inner end portion 41b of the first planar coil 41, a first through conductor 41c extending in the thickness direction of the insulating substrate 30 is provided. The first planar coil 41 is made of Cu, for example, and can be formed by electroplating.

[0042] As with the first planar coil 41, the second planar coil 42 is a substantially long circular spiral-shaped air-core coil wound around the opening 32 of the coil forming portion 31 on the upper surface 30a of the insulating substrate 30 and in the same layer. The second planar coil 42 is wound on the inner peripheral side of the first planar coil 41 in a manner adjacent to the first planar coil 41. The number of turns of the second planar coil 42 can be one turn or a plurality of turns. In the present embodiment, the number of turns of the second planar coil 42 is the same as that of the first planar coil 41. The second planar coil 42 has an outer side end portion 42a and an inner side end portion 42b. As with the outer side end portion 41a of the first planar coil 41, the outer side end portion 42a of the second planar coil 42 is provided to the frame portion 34A and is exposed from the end surface 10a of the main body 10. The inner side end portion 42b of the second planar coil 42 is provided to the edge of the opening 32 and is adjacent to the inner side end portion 41b of the first planar coil 41. On the insulating substrate 30, a second through conductor 42c extending in the thickness direction of the insulating substrate 30 is provided at a position overlapping the inner side end portion 42b of the second planar coil 42. As with the first planar coil 41, the second planar coil 42 is composed of, for example, Cu and can be formed by electroplating.

[0043] The upper insulator 50A (first insulating portion) is provided on the upper surface 30a of the insulating substrate 30 and is a thick film resist patterned using a known photolithography method. The upper insulator 50A demarcates plating growth regions of the first planar coil 41 and the second planar coil 42. In the present embodiment, as shown in FIG. 2, the upper insulator 50A integrally covers the first planar coil 41 and the second planar coil 42, more specifically, the side surfaces and the upper surfaces of the first planar coil 41 and the second planar coil 42. As shown in FIG. 2, a portion of the upper insulator 50A extends from the inside of the main body 10 to the end surface 10a of the main body 10 between the outer side end portion 41a and the outer side end portion 42a and is exposed at the end surface 10a. In addition, as shown in FIG. 2, a portion of the upper insulator 50A extends from the inside of the main body 10 to the end surface 10b of the main body 10 along the substrate upper surface 30a and is exposed at the end surface 10b. The thickness of the upper insulator 50A is greater than the thickness of the first planar coil 41 and the second planar coil 42. The upper insulator 50A is composed of, for example, an epoxy resin. Figure 4 Figure 5 6 Figure 5 6

[0044] The lower coil structure 40B is provided to the substrate lower surface 30b of the coil forming portion 31 of the insulating substrate 30. As shown in FIG. 2, Figure 2 3 ​​​​​​As shown, the lower coil structure 40B includes the first planar coil 41, the second planar coil 42, and the lower insulator 50B. The first planar coil 41 and the second planar coil 42 are wound in a side-by-side manner and in an adjacent state on the lower surface 30b of the insulating substrate 30.

[0045] The first planar coil 41 and the second planar coil 42 of the lower coil structure 40B have symmetry with the first planar coil 41 and the second planar coil 42 of the upper coil structure 40A. More specifically, the first planar coil 41 and the second planar coil 42 of the lower coil structure 40B have shapes that flip the first planar coil 41 and the second planar coil 42 of the upper coil structure 40A around an axis parallel to the short side of the body 10.

[0046] The outer side end portion 41a of the first planar coil 41 of the lower coil structure 40B is provided in the frame portion 34B and exposed from the end surface 10b of the body 10. The inner side end portion 41b of the first planar coil 41 of the lower coil structure 40B overlaps the first through conductor 41c provided in the insulating substrate 30. Thus, the inner side end portion 41b of the first planar coil 41 of the lower coil structure 40B is electrically connected to the inner side end portion 41b of the first planar coil 41 of the upper coil structure 40A via the first through conductor 41c. The first planar coil 41 of the lower coil structure 40B is composed of Cu, for example, and can be formed by electroplating.

[0047] The outer side end portion 42a of the second planar coil 42 of the lower coil structure 40B is provided in the frame portion 34B and exposed from the end surface 10b of the body 10. The inner side end portion 42b of the second planar coil 42 of the lower coil structure 40B overlaps the second through conductor 42c provided in the insulating substrate 30. Thus, the inner side end portion 42b of the second planar coil 42 of the lower coil structure 40B is electrically connected to the inner side end portion 42b of the second planar coil 42 of the upper coil structure 40A via the second through conductor 42c. The second planar coil 42 of the lower coil structure 40B is composed of Cu, for example, and can be formed by electroplating.

[0048] The lower insulator 50B (second insulating portion) is provided on the lower surface 30b of the insulating substrate 30 and is a thick film resist patterned using a known photolithography method. Like the upper insulator 50A, the lower insulator 50B defines plating growth regions of the first planar coil 41 and the second planar coil 42. In the present embodiment, as shown in FIG. 4, the lower insulator 50B is provided in the frame portion 34B of the insulating substrate 30. Figure 4As shown, the lower-side insulator 50B integrally covers the first planar coil 41 and the second planar coil 42, more specifically, the side surfaces and the upper surface of the first planar coil 41 and the second planar coil 42. As with the upper-side insulator 50A, a portion of the lower-side insulator 50B extends from the inside of the body 10 to the end surface 10b of the body 10 between the outer side end portion 41a and the outer side end portion 42a, and is exposed at the end surface 10b. In addition, a portion of the lower-side insulator 50B extends from the inside of the body 10 to the end surface 10a along the substrate lower surface 30b, and is exposed at the end surface 10a. The thickness of the lower-side insulator 50B is greater than the thickness of the first planar coil 41 and the second planar coil 42. The thickness of the lower-side insulator 50B can be the same as the thickness of the upper-side insulator 50A. The lower-side insulator 50B is composed of, for example, an epoxy resin.

[0049] The pair of coil portions C1, C2 constituting the double-layer coil structure are included on the body 10. The first coil portion C1 is constituted by the first planar coil 41 of the upper-side coil structure 40A provided on the upper surface 30a of the insulating substrate 30, the first planar coil 41 of the lower-side coil structure 40B provided on the lower surface 30b of the insulating substrate 30, and the first through conductor 41c connecting the first planar coils 41 of both sides to each other. In the first coil portion C1, the outer side end portion 41a of the first planar coil 41 of the upper-side coil structure 40A constitutes the first end portion, and the outer side end portion 41a of the first planar coil 41 of the lower-side coil structure 40B constitutes the second end portion. The second coil portion C2 is constituted by the second planar coil 42 of the upper-side coil structure 40A provided on the upper surface 30a of the insulating substrate 30, the second planar coil 42 of the lower-side coil structure 40B provided on the lower surface 30b of the insulating substrate 30, and the second through conductor 42c connecting the second planar coils 42 of both sides to each other. In the second coil portion C2, the outer side end portion 42a of the second planar coil 42 of the upper-side coil structure 40A constitutes the first end portion, and the outer side end portion 42a of the second planar coil 42 of the lower-side coil structure 40B constitutes the second end portion.

[0050] The two pairs of external terminal electrodes 60A, 60B, 60C, 60D are each provided with a pair on the end surfaces 10a, 10b of the body 10 that are parallel to each other.

[0051] In the pair of external terminal electrodes 60A, 60B (first external terminals) provided on the end surface 10a, the external terminal electrode 60A is connected to the outer side end portion 41a of the first planar coil 41 of the upper-side coil structure 40A, and the external terminal electrode 60B is connected to the outer side end portion 42a of the second planar coil 42 of the upper-side coil structure 40A. As with the pair of external terminal electrodes 60C, 60D (second external terminals) provided on the end surface 10b, the external terminal electrode 60C is connected to the outer side end portion 41a of the first planar coil 41 of the lower-side coil structure 40B, and the external terminal electrode 60D is connected to the outer side end portion 42a of the second planar coil 42 of the lower-side coil structure 40B. Figure 6As shown, the external terminal electrode 60A is biased toward the side surface 10f side when viewed from the end surface 10a side, and covers the vicinity of the side surface 10f of the end surface 10a. Further, the external terminal electrode 60B is biased toward the side surface 10e side, and covers the vicinity of the side surface 10e of the end surface 10a. The external terminal electrode 60A and the external terminal electrode 60B are spaced apart at a prescribed uniform width when viewed from the end surface 10a side.

[0052] Among the pair of external terminal electrodes 60C, 60D (second external terminal) provided on the end surface 10b, the external terminal electrode 60C is connected to the outer side end portion 41a of the first planar coil 41 of the lower side coil structure 40B, and the external terminal electrode 60D is connected to the outer side end portion 42a of the second planar coil 42 of the lower side coil structure 40B. The external terminal electrode 60C is biased toward the side surface 10f side, and covers the vicinity of the side surface 10f of the end surface 10b. Further, the external terminal electrode 60D is biased toward the side surface 10e side, and covers the vicinity of the side surface 10e of the end surface 10b. The external terminal electrode 60C and the external terminal electrode 60D are spaced apart at a prescribed uniform width when viewed from the end surface 10b side.

[0053] The external terminal electrode 60A of the end surface 10a and the external terminal electrode 60C of the end surface 10b are provided at positions corresponding to each other in the long side direction of the main body 10. Similarly, the external terminal electrode 60B of the end surface 10a and the external terminal electrode 60D of the end surface 10b are provided at positions corresponding to each other in the long side direction of the main body 10.

[0054] The external terminal electrodes 60A, 60B, 60C, 60D are each curved into an L shape, and continuously cover the end surfaces 10a, 10b and the upper surface 10c. In the present embodiment, the external terminal electrodes 60A, 60B, 60C, 60D are composed of a resin electrode, for example, composed of a resin containing Ag powder.

[0055] Next, the structure of the end surface 10a of the main body 10 will be described with reference to FIG. 2. Figure 7 The structure of the end surface 10a of the main body 10 will be described.

[0056] On the end surface 10a of the main body 10, the outer side end portion 41a of the first planar coil 41 and the outer side end portion 42a of the second planar coil 42 are aligned on the upper surface 30a of the insulating substrate 30. Further, the upper side insulator 50A is positioned in the region R between the outer side end portion 41a of the first planar coil 41 and the outer side end portion 42a of the second planar coil 42 in the end surface 10a of the main body 10. In the present embodiment, the upper side insulator 50A is present in the entire region R, and extends across the outer side end portions 41a, 42a on the end surface 10a of the main body 10. Further, the lower side insulator 50B is positioned on the end surface 10a of the main body 10 in a manner opposed to the upper side insulator 50A with the insulating substrate 30 interposed therebetween.

[0057] In the coil component 1 described above, a potential difference is sometimes generated between the outer side end portions 41a, 42a when a voltage is applied via the external terminal electrodes 60A, 60B, 60C, 60D. In the coil component 1, the insulating property between the outer side end portions 41a, 42a can be improved by the upper side insulator 50A exposed at the end face 10a of the core 10, and thus, even in a case where a potential difference is generated between the outer side end portions 41a, 42a, the short-circuiting of the outer side end portions 41a, 42a to each other on the end face 10a can be suppressed. In the present embodiment, the insulating property between the outer side end portions 41a, 42a can be further improved by the lower side insulator 50B exposed at the end face 10a of the core 10, and thus, the short-circuiting of the outer side end portions 41a, 42a to each other on the end face 10a can be further suppressed.

[0058] Likewise, on the end face 10b of the core 10, as shown in FIG. 6, the lower side insulator 50B exposed at the end face 10b is positioned in the region R between the outer side end portion 41a of the first planar coil 41 and the outer side end portion 42a of the second planar coil 42. The insulating property between the outer side end portions 41a, 42a can be improved by the lower side insulator 50B, and thus, even in a case where a potential difference is generated between the outer side end portions 41a, 42a, the short-circuiting of the outer side end portions 41a, 42a to each other on the end face 10b can be suppressed. In the present embodiment, the insulating property between the outer side end portions 41a, 42a can be further improved by the upper side insulator 50A exposed at the end face 10b of the core 10, and thus, the short-circuiting of the outer side end portions 41a, 42a to each other on the end face 10b can be further suppressed. Figure 8

[0059] In the present embodiment, the external terminal electrode 60A directly covers a portion of the upper side insulator 50A exposed at the region R (more specifically, a portion on the outer side end portion 41a side), and the external terminal electrode 60B directly covers a portion of the upper side insulator 50A exposed at the region R (more specifically, a portion on the outer side end portion 42a side). By the external terminal electrodes 60A, 60B covering a portion of the upper side insulator 50A in this way, the contact area of the external terminal electrodes 60A, 60B with the core 10 can be reduced, and thus, even in a case where a potential difference is generated between the outer side end portions 41a, 42a, the risk of short-circuiting can be reduced.

[0060] The upper side insulator 50A and the lower side insulator 50B do not necessarily need to be present in the entire region of the region R, and can be present in a portion of the region R. At this time, the external terminal electrodes 60A, 60B, 60C, 60D can cover a portion of the upper side insulator 50A and the lower side insulator 50B, or can completely cover the upper side insulator 50A and the lower side insulator 50B.

[0061] For example, it can be as shown in FIG. 7.​Figure 9 The metal-containing magnetic powder-containing resin 12 of the body 10 is positioned in the region R in the manner shown. In Figure 9 In the manner shown, a portion 12a of the metal-containing magnetic powder-containing resin 12 is exposed from the inside of the body 10 in the region R, and the upper insulator 50A is sandwiched by the metal-containing magnetic powder-containing resin 12 in the arrangement direction (left-right direction in the drawing) of the outer terminal electrodes 60A, 60B. In this case, the outer terminal electrode 60A can also directly cover a portion of the upper insulator 50A exposed in the region R, and the outer terminal electrode 60B can also directly cover a portion of the upper insulator 50A exposed in the region R. Figure 9

[0062] In addition, it can also be as shown in Figure 10 the insulating layer 70 covering the exposed end surface 10a is provided between the outer terminal electrodes 60A, 60B. The insulating layer 70 extends on the end surface 10a of the body 10 in a manner that traverses between the outer terminal electrodes 60A, 60B. The insulating layer 70 can be provided in a manner that covers at least a portion of the region R. An insulating layer 70 covering the exposed end surface 10b can also be provided between the outer terminal electrodes 60C, 60D. The insulating layer 70 can be composed of an epoxy resin.​

Claims

1. A coil component characterized by comprising: Comprising: a body composed of a resin containing a metal magnetic powder, having a first end surface and a second end surface parallel to each other; an insulating substrate disposed in the body, orthogonal to the first end surface and the second end surface, and extending between the first end surface and the second end surface; a pair of coil portions disposed on the insulating substrate, each having a first end portion exposed at the first end surface; a pair of first external terminals disposed at the first end surface, each connected to the first end portion of the pair of coil portions; and a first insulating portion exposed at the first end surface from the inside of the body, and positioned between the first end portions of the pair of coil portions on the first end surface, the first insulating portion and the resin containing a metal magnetic powder are exposed at a region in the first end surface sandwiched between the first end portions of the pair of coil portions, the first insulating portion is sandwiched by the resin containing a metal magnetic powder in a direction in which the first end portions of the pair of coil portions are aligned.

2. The coil component according to claim 1, characterized in that: the first insulating portion extends across the first end portions of the pair of coil portions.

3. The coil component according to claim 1 or 2, characterized in that: further comprising an insulating layer covering at least a portion of the region in the first end surface sandwiched between the first end portions of the pair of coil portions.

4. The coil component according to claim 1 or 2, characterized in that: the first external terminals directly cover a portion of the first insulating portion on the first end surface.

5. The coil component according to claim 1 or 2, characterized in that: the pair of coil portions each have a second end portion exposed at the second end surface, the coil component further comprising: a pair of second external terminals disposed at the second end surface, each connected to the second end portion of the pair of coil portions; and a second insulating portion exposed at the second end surface from the inside of the body, and positioned between the second end portions of the pair of coil portions on the second end surface.

Images