Coil component

Abstract

The present invention relates to a coil component. In order to form a gap between the top surfaces (9, 10) of the first flange portion (5) and the second flange portion (6) of a core (2) and the lower main surface (15) of a top plate (14), a convex first partition portion (21) and a convex second partition portion (22) are provided in each of a portion of the area of the lower main surface (15) that opposes the first flange portion (5) and the second flange portion (6), respectively, and contact the top surfaces (9, 10), respectively. A table-shaped portion (23) that provides a wall thickness portion is provided in the area of the lower main surface (15) of the top plate (14) that opposes the winding core portion (3), and the first partition portion (21) and the second partition portion (22) are connected via the table-shaped portion (23). The partition portions (21, 22) form convex portions with a relatively large area together with the table-shaped portion (23), so even if a polishing process for deburring or chamfering is performed, the partition portions (21, 22) can be inhibited from being shaved and damaged.

Description

Technical Field

[0001] The present invention relates to a coil component comprising: a core having a core portion on which wire is wound and a first flange portion and a second flange portion disposed at each end of the core portion; and a top plate fixed to the core body in a manner spanning between the first flange portion and the second flange portion, particularly relating to the shape of the top plate. Background Technology

[0002] For example, Japanese Patent Application Publication No. 2018-107248 (Patent Document 1) describes a coil component comprising: a drum-shaped core made of a magnetic material, the core having a core portion on which wire is wound and a first flange portion and a second flange portion disposed at each end of the core portion; and a top plate made of a magnetic material, the top plate being bonded and fixed to the core portion in a state spanning between the first flange portion and the second flange portion.

[0003] The first flange portion and the second flange portion each have a mounting surface facing the mounting substrate and a top surface opposite to the mounting surface, respectively. The top plate is fixed to the core by an adhesive with its lower main surface facing the respective top surfaces of the first flange portion and the second flange portion.

[0004] A gap is provided between the top surface of each of the first and second flange portions and the lower main surface of the top plate to prevent magnetic saturation and improve the DC superposition characteristics. To provide such a gap, for example, multiple protrusions are provided on the lower main surface of the top plate in the region opposite to the first and second flange portions, respectively, to contact the top surface of each of the first and second flange portions.

[0005] Patent Document 1: Japanese Patent Application Publication No. 2018-107248

[0006] The aforementioned core and top plate are manufactured, for example, by stamping ferrite powder using a mold and then firing the resulting molded body. After firing, tumbling is performed to remove burrs generated during molding. At this point, the edges of the core and top plate are chamfered and given small rounded corners.

[0007] However, depending on the grinding conditions, in the tumbling grinding process, there is a possibility that at least a portion of the protrusions may be removed, even if undesirably. This leads to variations in the characteristics of the coil components, and undesirable conditions such as the inability to consistently obtain the desired inductance value. Summary of the Invention

[0008] Therefore, the object of the present invention is to provide a coil component capable of stably forming a gap between the top plate and the core.

[0009] This invention relates to a coil component comprising: a core, formed of a first magnetic material, having a first flange, a second flange, and a winding core extending along an axial direction, wherein the first flange and the second flange are respectively disposed at opposite ends of the winding core in the axial direction; a top plate, formed of a second magnetic material, having a lower main surface and an upper main surface facing opposite directions; and at least one wire wound around the winding core. The first magnetic material and the second magnetic material may be the same or different.

[0010] The first flange portion and the second flange portion each have a mounting surface facing the mounting substrate side during installation, and a top surface opposite to the mounting surface. The top plate is fixed to the core with its lower main surface facing the respective top surfaces of the first flange portion and the second flange portion via adhesive.

[0011] A convex first isolation portion that contacts the top surface is provided in a portion of the area on the main surface below the top plate that is opposite to the first flange portion.

[0012] A convex second isolation portion that contacts the top surface is provided in a portion of the area on the main surface below the top plate that is opposite to the second flange portion.

[0013] In order to solve the above-mentioned technical problems, the present invention is characterized in that a convex platform-shaped portion is provided in the area opposite to the core portion on the main surface below the top plate, and the first isolation portion and the second isolation portion are connected via the platform-shaped portion.

[0014] According to the present invention, the first isolation portion and the second isolation portion, which form a gap between the top surface of the first flange portion and the lower main surface of the top plate, are connected via a platform-shaped portion. Therefore, the first isolation portion and the second isolation portion together with the platform-shaped portion form a convex portion with a relatively large area. Thus, even when a grinding process for deburring or chamfering is performed, damage to the first isolation portion and the second isolation portion can be prevented from being shaved off, thereby stably obtaining the desired inductance value and other electrical characteristics.

[0015] Furthermore, according to the present invention, since a convex, platform-shaped portion forming the wall thickness is provided on the top plate, the mechanical strength of the top plate, such as its flexural strength, can be improved. Also, since the platform-shaped portion is located on the lower main surface of the top plate in the area opposite to the core portion, the coil component in the product is not enlarged. This aforementioned mechanical strength is required, for example, when processing the coil component using an assembly machine. Attached Figure Description

[0016] Figure 1 This is a front view showing the appearance of the coil component 1 according to the first embodiment of the present invention.

[0017] Figure 2 It means Figure 1The left-side view of the appearance of coil component 1 shown.

[0018] Figure 3 It means Figure 1 The diagram shows a perspective view of the coil component 1, omitting the diagram of the wire.

[0019] Figure 4 It is represented separately from the 15th side of the main face below. Figure 1 A perspective view of the top plate 14 of the coil component 1 shown.

[0020] Figure 5 It is along Figure 1 A sectional view of line AA.

[0021] Figure 6 This is a perspective view showing the top plate 14 of the coil component according to the second embodiment of the present invention, viewed separately from the lower main side.

[0022] Figure 7 It has Figure 6 The coil component 1 of the top plate 14 shown is equivalent to Figure 5 A sectional view.

[0023] Figure 8 This is a perspective view showing the top plate 14 of the coil component according to the third embodiment of the present invention, viewed separately from the lower main side.

[0024] Figure 9 This is a perspective view showing the top plate 14 of the coil component according to the fourth embodiment of the present invention, viewed separately from the lower main side.

[0025] Explanation of reference numerals in the attached figures

[0026] 1…coil component; 2…core; 3…winding core; 5, 6…flange; 7, 8…mounting surface; 9, 10…top surface; 11, 12…terminal electrode; 13…wire; 14…top plate; 15…lower main surface; 16…upper main surface; 17…adhesive; 21, 22…isolation part; 23…platform part; 24…side extending along the length direction; AX…axial direction; WD…width direction. Detailed Implementation

[0027] Reference Figures 1 to 5 The coil component 1 of the first embodiment of the present invention will be described.

[0028] The coil component 1 includes a core 2 made of ferrite, such as Ni-Zn ferrite, or a magnetic material such as resin containing ferrite powder or metallic magnetic powder. The core 2 has a winding core portion 3 extending along the axial direction AX, and a first flange portion 5 and a second flange portion 6 respectively provided at opposite ends along the axial direction AX of the winding core portion 3. The cross-sectional shape of the winding core portion 3 is, for example, a quadrilateral shape, but it can also be a polygonal shape such as a hexagon, a circular shape, an elliptical shape, or a combination thereof.

[0029] The first flange portion 5 and the second flange portion 6 each have mounting surfaces 7 and 8 facing the mounting substrate (not shown) during installation, and top surfaces 9 and 10 on the opposite sides of the mounting surfaces 7 and 8, respectively.

[0030] A first terminal electrode 11 is provided on the mounting surface 7 of the first flange portion, and a second terminal electrode 12 is provided on the mounting surface 8 of the second flange portion 6. The terminal electrodes 11 and 12 are formed, for example, by impregnating or printing a conductive paste containing conductive metal powder such as Ag powder, then sintering them, and subsequently sequentially plating Cu, Ni, and Sn. Alternatively, the terminal electrodes 11 and 12 can also be provided by mounting terminal components made of conductive metal plates onto the first flange portion 5 and the second flange portion 6.

[0031] like Figure 1 As shown, at least one wire 13 is wound in the core section 3. Furthermore, in Figure 3 The diagram of wire 13 is omitted. Wire 13, for example, comprises a center wire made of a highly conductive metal such as copper, silver, or gold, and an insulating film covering the center wire made of an electrically insulating resin such as polyamide-imide, polyurethane, or polyester-imide. The center wire has a diameter, for example, between 40 μm and 200 μm.

[0032] One end of the wire 13 is connected to the first terminal electrode 11 on the mounting surface 7 side of the first flange portion 5, and the other end is similarly connected to the second terminal electrode 12 on the mounting surface 8 side of the second flange portion 6. According to this structure, since it is not necessary for the end of the wire 13 to be located at the junction of the core 2 and the top plate 14, the core 2 and the top plate 14 can be designed without being affected by the presence of the wire 13. For example, the position and shape of the isolation portions 21 and 22, described later, are not limited by the wire 13.

[0033] The connection between the terminal electrodes 11 and 12 and the wire 13 can be achieved by methods such as thermoforming, ultrasonic welding, or laser welding. The number of turns of the wire 13 on the core portion 3 can be arbitrarily selected according to the required characteristics. The wire 13 can also be wound in multiple layers as needed.

[0034] The coil component 1 includes a top plate 14 spanning between the first flange portion 5 and the second flange portion 6. The top plate 14 has a lower main surface 15 and an upper main surface 16 facing opposite directions. The top plate 14 is made of, for example, ferrite, or a magnetic material such as resin containing ferrite powder or metallic magnetic powder. Thus, when both the core 2 and the top plate 14 are made of magnetic materials, the top plate 14 and the core 2 cooperate to form a closed magnetic circuit.

[0035] The top plate 14 is fixed to the core 2 with its lower main surface 15 facing the top surface 9 of the first flange 5 and the top surface 10 of the second flange 6 via adhesive 17. The adhesive 17 includes, for example, a thermosetting resin such as epoxy resin. To improve thermal shock resistance, inorganic fillers such as silica fillers may also be added to the adhesive 17.

[0036] As an example, coil component 1 has a length direction (axial direction AX) dimension of 1.6 mm, a width direction (a direction perpendicular to the axial direction AX and parallel to the mounting surface) dimension of 0.8 mm, and a height direction (a direction perpendicular to both the axial direction AX and the width direction) dimension of 1.1 mm. According to the present invention, the reduction in mechanical strength of the top plate 14 can be suppressed, thus the effect of the present invention is particularly pronounced in small products where the top plate 14 is thinner. However, in the present invention, product size is not limited.

[0037] The coil component 1 is preferably manufactured as follows, for example.

[0038] First, the core 2 and the top plate 14 are prepared separately. To manufacture these cores 2 and top plates 14 separately, ferrite powder is stamped using a mold, and the resulting molded body is sintered to obtain a sintered body that should become the core 2 and a sintered body that should become the top plate 14. Then, the sintered bodies that should become the core 2 and the top plate 14 are deburred by tumbling, thus obtaining the core 2 and the top plate 14 respectively. The edges of the core 2 and the top plate 14 are chamfered and small rounded.

[0039] Next, in order to provide terminal electrodes 11 and 12 on the core 2, a conductive paste containing Ag is applied, for example, to the mounting surfaces 7 and 8 of the first flange portion 5 and the second flange portion 6, and sintered. Then, Cu, Ni and Sn are sequentially plated by electrolytic barrel plating.

[0040] Next, for example, the wire 13 is wound onto the core portion 3 of the core 2 through a nozzle, and one end of the wire 13 is connected to the first terminal electrode 11 and the second terminal electrode 12, respectively. Here, the connection between the wire 13 and the terminal electrodes 11 and 12 is achieved, for example, by thermocompression bonding based on a heating element. The excess portion of the wire 13 connected to the terminal electrodes 11 and 12 is cut off and removed by a cutter.

[0041] Next, the top plate 14 is disposed on the core 2 via adhesive 17, and the top plate 14 and the core 2 are fixed to each other.

[0042] As described above, complete coil component 1.

[0043] The coil component 1, particularly in the top plate 14, has the following characteristics.

[0044] like Figure 4 As shown, on the lower main surface 15 of the top plate 14, in the region opposite to the first flange portion 5 and the second flange portion 6, convex first isolation portions 21 and second isolation portions 22 are provided, respectively contacting portions of the top surfaces 9 and 10. Furthermore, sometimes a thin film of adhesive 17 is sandwiched between the first isolation portions 21 and the second isolation portions 22 and the top surfaces 9 and 10, respectively. The isolation portions 21 and 22 form gaps between the top surfaces 9 and 10 of the first flange portion 5 and the second flange portion 6 and the lower main surface 15 of the top plate 14. The height dimension of each of the first isolation portions 21 and the second isolation portions 22 from the lower main surface 15, i.e., the size of the gap, is, for example, 20 μm or more and 70 μm or less.

[0045] In this embodiment, when the direction of extension of the lower main surface 15 and the direction orthogonal to the axial direction AX is taken as the width direction WD, the first isolation portion 21 is divided into two parts 21a and 21b arranged in the width direction, and the second isolation portion 22 is divided into two parts 22a and 22b arranged in the width direction. This is one of the means to reduce the contact area between the isolation portions 21 and 22 and the flange portions 5 and 6, making magnetic saturation less likely to occur, and is also used to stabilize the posture of the top plate 14 relative to the core 2.

[0046] Furthermore, in the area of ​​the main surface 15 below the top plate 14 opposite to the core portion 3, a convex platform-shaped portion 23 that forms the wall thickness portion is provided. Moreover, the first isolation portion 21 and the second isolation portion 22 are connected via the platform-shaped portion 23. As a result, the first isolation portion 21, the second isolation portion 22, and the platform-shaped portion 23 are formed into an H-shaped planar shape.

[0047] In this way, the first isolation portion 21 and the second isolation portion 22 together with the platform-shaped portion 23 form a convex portion with a relatively large area. Therefore, even if a tumbling grinding process for deburring or chamfering is performed, it is possible to prevent the first isolation portion 21 and the second isolation portion 22 from being shaved off and damaged, thereby reducing the impact on electrical properties.

[0048] Furthermore, since the top plate 14 is provided with a convex platform-shaped portion 23 that forms part of the wall thickness, the mechanical strength of the top plate 14, such as its bending strength, can be improved. Also, since the platform-shaped portion 23 is provided in the area of ​​the main surface 15 below the top plate 14 that is opposite to the core portion 3 and does not protrude outward, the coil component 1 of the product will not be enlarged.

[0049] Furthermore, as described above, the first isolation portion 21, the second isolation portion 22, and the platform-shaped portion 23 are formed into an H-shaped planar shape. Therefore, if adhesive 17 is applied to the space separated by portions 21a and 21b of the first isolation portion 21 and the platform-shaped portion 23, and to the space separated by portions 22a and 22b of the second isolation portion 22 and the platform-shaped portion 23, a stable application shape of adhesive 17 can be obtained.

[0050] In this embodiment, the following features can also be found.

[0051] The width direction WD of the platform-shaped portion 23 is greater than the width direction WD of both the first isolation portion 21 and the second isolation portion 22. Here, the width direction WD of the first isolation portion 21 refers to the sum of the width direction WD of portion 21a and portion 21b, and the width direction WD of the second isolation portion 22 refers to the sum of the width direction WD of portion 22a and portion 22b. With this structure, the effect of increasing the flexural strength of the top plate 14 through the increased wall thickness of the platform-shaped portion 23 can be further utilized.

[0052] When the dimension measured in the direction parallel to the axial direction AX is taken as the length dimension, the length dimension of the platform-shaped portion 23 is smaller than the length dimension of the core portion 3, and the platform-shaped portion 23 is separate from each of the first flange portion 5 and the second flange portion 6. These can be determined according to... Figure 1 The outline of the platform-shaped portion 23, shown by the dashed line, is inferred from this structure. According to this structure, the platform-shaped portion 23 does not contribute to the formation of the magnetic flux circuit, does not impair the effect of improving the DC superposition characteristics, and can achieve increased mechanical strength. This effect is achieved more reliably when the distance between each of the first flange portion 5 and the second flange portion 6 and the platform-shaped portion 23 is larger than the distance between the flange portions 5 and 6 based on the aforementioned isolation portions 21 and 22 and the top plate 14.

[0053] Regarding the height dimension measured from the lower main surface 15 of the top plate 14, the height dimension of the platform-shaped portion 23 is equal to the height dimension of each of the first isolation portion 21 and the second isolation portion 22. According to this structure, no step is formed between each of the first isolation portion 21 and the second isolation portion 22 and the platform-shaped portion 23. Steps can become stress concentration points, but by eliminating steps, the mechanical strength of the top plate 14 can be further improved.

[0054] Furthermore, if we focus on the platform-shaped portion 23, it extends continuously in the width direction WD. When the platform-shaped portion is provided at multiple locations in the width direction WD, a step is created between it and the lower main surface 15 of the top plate 14. However, when it extends continuously, no step is created. Therefore, there are no stress concentration points caused by the step, and thus the mechanical strength of the top plate 14 is not reduced due to such a step.

[0055] like Figure 2 and Figure 5 As shown, the width direction WD of the top plate 14 is larger than the width direction WD of the flange portions 5 and 6 of the core 2. In addition to this structure, when the direction parallel to the axial direction AX is taken as the length direction, the lower main surface 15 of the top plate 14 has an edge 24 extending along the length direction (see reference). Figure 4 The first isolation portion 21 and the second isolation portion 22 are located in contact with the edge 24 extending along the length direction. Furthermore, in Figure 5 The illustration of adhesive 17 is omitted in the text.

[0056] In the above situation, such as Figure 5 As shown, the following conditions are met: the two ends of the top surface 9 of the first flange portion 5 in the width direction WD are located opposite to the middle part of the first isolation portion 21 in the width direction WD, and the two ends of the top surface 10 of the second flange portion 6 in the width direction WD are located opposite to the middle part of the second isolation portion 22 in the width direction WD.

[0057] Based on such a structure, for example... Figure 5 As shown by the dashed line, even if the position of the top plate 14 relative to the core 2 is slightly offset in the width direction WD, the contact area between the lower main surface 15 of the top plate 14 and the top surfaces 9 and 10 of the flanges 5 and 6 can be kept constant. Therefore, even if the position of the top plate 14 relative to the core 2 is offset, the magnetic properties can remain substantially unchanged.

[0058] like Figure 1 and Figure 3As shown, the first isolation portion 21 faces the region of the top surface 9 of the first flange portion 5 near the core portion 3, and the second isolation portion 22 faces the region of the top surface 10 of the second flange portion 6 near the core portion 2. For example, the region of the first isolation portion 21 along the axial direction AX of the top surface 9 overlaps with the top surface 9, and the region of the second isolation portion 22 along the axial direction AX of the top surface 10 overlaps with the top surface 10. This structure is one of the means to reduce the contact area between the isolation portions 21 and 22 and the flange portions 5 and 6, making magnetic saturation less likely to occur. In addition, according to this structure, since the contact portions of the isolation portions 21 and 22 with the top surfaces 9 and 10 are close to the core portion 3, the closed magnetic circuit formed by the core 2 and the top plate 14 can be further shortened, thereby reducing magnetic reluctance.

[0059] The periphery of each of the first isolation section 21, the second isolation section 22, and the platform-shaped section 23 has a sloping surface formed by the raised surface that rises from the lower main surface. According to this structure, stress can be dispersed, which helps to improve mechanical strength, and the molding using the top plate 14 of the mold becomes easier.

[0060] Next, refer to Figure 6 Other embodiments of the present invention will be described thereafter. Figure 6 In the accompanying diagrams, regarding... Figures 1 to 5 Elements shown that correspond to each other are labeled with the same reference numerals, and repeated descriptions are omitted. Descriptions of other embodiments will only be related to... Figures 1 to 5 The embodiments shown are compared with the substantially different parts, or the characteristic parts, as objects.

[0061] Reference Figure 6 and Figure 7 In the second embodiment, the first isolating portion 21 and the second isolating portion 22 are located separately from the edge 24 extending along the length direction of the lower main surface 15 of the top plate 14. Similarly, the platform-shaped portion 23 is also located separately from the edge 24 extending along the length direction of the lower main surface 15 of the top plate 14. According to this structure, in the tumbling grinding process for deburring or chamfering the top plate 14, damage caused by the first isolating portion 21, the second isolating portion 22, and the platform-shaped portion 23 being shaved off can be further suppressed.

[0062] In addition to the structure described above, in the second embodiment, such as Figure 7 As shown, the two ends of the top surface 9 of the first flange portion 5 in the width direction WD are located opposite to the position offset from the outer side of the width direction WD of the first isolation portion 21, and the two ends of the top surface 10 of the second flange portion 6 in the width direction WD are located opposite to the position offset from the outer side of the width direction WD of the second isolation portion 22.

[0063] According to this structure, from Figure 7It can be seen that even when the width direction WD of the top plate 14 is equal to the width direction WD of the flange portions 5 and 6 of the core 2, even if the position of the top plate 14 relative to the core 2 is slightly offset in the width direction WD, the change in magnetic properties can be reduced.

[0064] Reference Figure 8 In the third embodiment, the characteristic feature is that, regarding the height dimension measured from the lower main surface 15 of the top plate 14, the height dimension of the platform-shaped portion 23 is greater than the height dimensions of both the first and second isolation portions. According to this structure, the mechanical strength, such as the flexural strength, of the top plate 14 can be further improved.

[0065] It should also be noted that the platform-shaped portion 23 is located in the area of ​​the main surface 15 below the top plate 14 opposite the core portion, and does not protrude outwards. In this case, even if the height dimension of the platform-shaped portion 23 is increased, the platform-shaped portion 23 will only be close to the core portion, and will not result in an increase in the size of the coil component 1 as a product.

[0066] In order to improve mechanical strength without compromising the effect of improving DC superposition characteristics, the third embodiment described above, as explained with respect to the first embodiment, has a structure in which the longitudinal dimension of the platform-shaped portion 23 is smaller than the longitudinal dimension of the core portion, and the platform-shaped portion 23 is separated from each of the first flange portion and the second flange portion. This is particularly effective because the larger the height dimension of the platform-shaped portion 23, the closer each of the first flange portion and the second flange portion is to the platform-shaped portion 23, and the weakening of the effect of improving DC superposition characteristics.

[0067] Reference Figure 9 The fourth embodiment has the features of the third embodiment, namely, the height dimension of the platform-shaped portion 23 is larger than the height dimension of each of the first isolation portion 21 and the second isolation portion 22, and also has the features of the second embodiment, namely, the first isolation portion 21, the second isolation portion 22 and the platform-shaped portion 23 are located at positions separated from the edge 24 extending along the length direction of the lower main surface 15 of the top plate 14.

[0068] The present invention has been described above in connection with the illustrated embodiments, but various other modifications are possible within the scope of the present invention.

[0069] For example, in addition to being a single coil as shown in the illustrated embodiment, the coil component involved in this invention can also be a common-mode choke coil, a transformer, or a balun. Therefore, the number of wires can be changed according to the function of the coil component, and correspondingly, the number of terminal electrodes provided on each flange can also be changed.

[0070] Furthermore, when constructing the coil component involved in this invention, partial substitutions or combinations of structures can be made between the different embodiments described in this specification.

Claims

1. A coil component, wherein, have: The core is composed of a first magnetic body and has a first flange portion, a second flange portion, and a winding core portion extending along the axial direction. The first flange portion and the second flange portion are respectively disposed at opposite ends of the winding core portion in the axial direction. The top plate is composed of a second magnetic body and has a lower main surface and an upper main surface facing opposite directions to each other; as well as At least one wire is wound around the core portion. The first flange portion and the second flange portion each have a mounting surface facing the mounting substrate side during installation, and a top surface on the opposite side of the mounting surface. The top plate is fixed to the core with its lower main surface facing the top surfaces of the first flange and the second flange, respectively, via adhesive. A convex first isolation portion is provided in a portion of the area opposite the first flange portion on the lower main surface, which contacts the top surface and forms a gap that is less likely to generate magnetic saturation between the top surface of the first flange portion and the lower main surface of the top plate. A convex second isolation portion is provided in a portion of the area opposite the second flange portion on the lower main surface. This second isolation portion contacts the top surface and forms a gap that is less likely to generate magnetic saturation between the top surface of the second flange portion and the lower main surface of the top plate. When the direction of extension of the lower main surface, orthogonal to the axial direction, is taken as the width direction, the first isolation portion is divided into two parts spaced apart and arranged in the width direction, and the second isolation portion is divided into two parts spaced apart and arranged in the width direction. The space between the two portions of the first isolation section is located at the center of the width direction of the lower main surface. The space between the two portions of the second isolation section is located at the center of the width direction of the lower main surface. A convex platform-shaped portion is provided in the area on the lower main surface opposite to the core portion. The first isolation section and the second isolation section are connected via the platform-shaped section.

2. The coil component according to claim 1, wherein, When the dimension measured along the extension direction of the lower main surface and orthogonal to the axial direction is taken as the width dimension, the width dimension of the platform-shaped portion is larger than the width dimensions of the first isolation portion and the second isolation portion respectively.

3. The coil component according to claim 1 or 2, wherein, When the dimension measured along a direction parallel to the axis is taken as the length dimension, the length dimension of the portion of the platform-shaped part opposite the core portion is smaller than the length dimension of the core portion, and the platform-shaped part is separated from each of the first flange portion and the second flange portion.

4. The coil component according to claim 3, wherein, The height dimension of the platform-shaped portion measured from the lower main surface is equal to the height dimension of each of the first isolation portion and the second isolation portion measured from the lower main surface.

5. The coil component according to claim 3, wherein, The height dimension of the platform-shaped portion, measured from the lower main surface, is larger than the height dimension of both the first isolation portion and the second isolation portion, measured from the lower main surface.

6. The coil component according to claim 1 or 2, wherein, When the direction parallel to the axis is taken as the length direction, the lower main surface has an edge extending along the length direction, and the first isolation portion and the second isolation portion are located in contact with the edge extending along the length direction.

7. The coil component according to claim 1 or 2, wherein, When the direction parallel to the axis is taken as the length direction, the lower main surface has an edge extending along the length direction, and the first isolation portion and the second isolation portion are located at a position separated from the edge extending along the length direction.

8. The coil component according to claim 1 or 2, wherein, When the direction of extension of the lower main surface orthogonal to the axial direction is taken as the width direction, the two ends of the top surface of the first flange in the width direction are located opposite to the middle part in the width direction of the first isolation portion, and the two ends of the top surface of the second flange in the width direction are located opposite to the middle part in the width direction of the second isolation portion.

9. The coil component according to claim 1 or 2, wherein, When the direction of extension of the lower main surface orthogonal to the axial direction is taken as the width direction, the two ends of the top surface of the first flange in the width direction are located opposite to the position deviating from the outer side in the width direction of the first isolation portion, and the two ends of the top surface of the second flange in the width direction are located opposite to the position deviating from the outer side in the width direction of the second isolation portion.

10. The coil component according to claim 1 or 2, wherein, The first isolation portion is opposite to the region of the top surface of the first flange portion near the core portion, and the second isolation portion is opposite to the region of the top surface of the second flange portion near the core portion.

11. The coil component according to claim 1 or 2, wherein, The raised surfaces of the first isolation section, the second isolation section, and the platform-shaped section, which rise from the lower main surface, form a sloped surface.

12. The coil component according to claim 1 or 2, wherein, The coil component also includes a terminal electrode disposed on the mounting surface, and the wire is connected to the terminal electrode on the mounting surface side.

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