Coil component

Abstract

In the coil component, at least one of a first wiring portion, a second wiring portion, and a pillar portion of a coil conductor includes a plurality of shunt portions that are shunted in parallel along an extension direction, for example, the pillar portion is entirely a shunt portion. In such a coil component, a high self-resonant frequency is achieved by reducing loss in the shunt section.

Description

Technical Field

[0001] This disclosure relates to a coil component. Background Technology

[0002] International Publication No. 2015 / 022889 discloses a coil component having a parallel section consisting of coil conductors with the same pattern overlapping each other and connected to each other through through holes (parallel connection). Summary of the Invention

[0003] The inventors repeatedly studied the structure of coil components that can achieve an increase in self-resonant frequency (SRF) and discovered a new structure for coil components that can achieve a high self-resonant frequency.

[0004] According to various aspects of this disclosure, a coil component is provided that enables an increase in self-resonant frequency.

[0005] A coil component according to one aspect of this disclosure includes: a body having a mounting surface, a pair of end faces facing each other in a first direction parallel to the mounting surface, and a pair of side faces facing each other in a second direction parallel to the mounting surface and orthogonal to the first direction; a pair of terminal electrodes disposed on the mounting surface of the body; and a coil conductor disposed within the body, including a plurality of first wiring portions extending parallel to the mounting surface, a plurality of second wiring portions extending parallel to the mounting surface and along the first direction and arranged side by side along the second direction on a side further away from the mounting surface than the first wiring portions, and a plurality of pairs of support portions extending toward the mounting surface from both ends of each of the plurality of second wiring portions along a third direction orthogonal to the first and second directions, the end portions extending to the mounting surface and connected to the pair of terminal electrodes, wherein at least one of the first wiring portions, second wiring portions, and support portions of the coil conductor includes branch portions that are branched into a plurality of parallel branches along the extension direction.

[0006] In the above-mentioned coil component, at least one of the first wiring section, the second wiring section, and the support section of the coil conductor includes a shunt section, and the loss is reduced in the shunt section, thereby achieving a high self-resonant frequency. Attached Figure Description

[0007] Figure 1 This is a perspective view of a coil component according to one embodiment.

[0008] Figure 2 It means Figure 1 A three-dimensional diagram of the coil conductor.

[0009] Figure 3 It means Figure 1 An exploded perspective view of the layer structure of the coil component shown.

[0010] Figure 4It means Figure 3 A diagram showing the structure of the wiring section of the first substrate layer.

[0011] Figure 5 It means Figure 3 A diagram showing the structure of the wiring section of the second body layer.

[0012] Figure 6 It means Figure 3 A diagram showing the structure of the wiring section of the third body layer.

[0013] Figure 7 It means Figure 3 A diagram showing the structure of the wiring section of the fourth body layer.

[0014] Figure 8 It means Figure 3 A diagram showing the structure of the wiring section of the fifth body layer.

[0015] Figure 9 It means Figure 1 A flowchart illustrating the manufacturing process of the coil component.

[0016] Figure 10 yes Figure 1 The side view of the coil component shown.

[0017] Figure 11 It is a three-dimensional diagram showing the structure of the support column.

[0018] Figure 12 This is a three-dimensional view of the coil conductor of the coil component in the comparative example.

[0019] Figure 13 This is a graph showing the simulation results of the embodiments and comparative examples.

[0020] Figure 14 It is a three-dimensional diagram representing the support structure of different types.

[0021] Figure 15 It is a three-dimensional diagram showing coil conductors with different structures.

[0022] Figure 16 It means Figure 15 A diagram showing the structure of the wiring section of the second body layer of the coil conductor.

[0023] Figure 17 It means Figure 15 A diagram showing the structure of the wiring section of the fourth body layer of the coil conductor.

[0024] Figure 18 It is a three-dimensional diagram showing coil conductors with different structures.

[0025] Figure 19 It means Figure 18 A diagram showing the structure of the wiring section of the first body layer of the coil conductor.

[0026] Figure 20 It means Figure 18 A diagram showing the structure of the wiring section of the third body layer of the coil conductor.

[0027] Figure 21 It is a three-dimensional diagram showing coil conductors with different structures. Detailed Implementation

[0028] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Furthermore, in the description of the drawings, the same or equivalent elements are labeled with the same reference numerals, and repeated descriptions are omitted.

[0029] Reference Figure 1 This describes the coil component of this embodiment. For example... Figure 1 , 2 As shown, in one embodiment, the coil component 1 is configured to include a body 2, a pair of bottom electrodes 3 and 4, and a coil conductor 5. The coil conductor 5 is disposed within the body 2 and, as described later, is configured to include multiple second wiring portions 6, multiple pairs of support portions 8, and multiple first wiring portions 7. Specifically, the coil conductor 5 includes three second wiring portions 6, three pairs of support portions 8, and two first wiring portions 7. The coil conductor 5 has a coil axis along a second direction D2 described later and rotates about the coil axis. In this embodiment, the coil conductor 5 rotates about the coil axis approximately 2.5 turns. The number of turns of the coil conductor 5 can be appropriately increased or decreased. Consequently, the number of pairs of support portions 8, the number of first wiring portions 7, and the number of second wiring portions 6 can also be increased or decreased.

[0030] Substrate 2 is rectangular in shape. The rectangular shape includes both cuboids with chamfered corners and edges, and cuboids with rounded corners and edges. Substrate 2 has a pair of end faces 2a and 2b, a pair of main faces 2c and 2d, and a pair of side faces 2e and 2f as its outer surfaces. End faces 2a and 2b are opposite each other. Main faces 2c and 2d are opposite each other. Side faces 2e and 2f are opposite each other. Hereinafter, the relative direction of end faces 2a and 2b is designated as the first direction D1, the relative direction of side faces 2e and 2f as the second direction D2, and the relative direction of main faces 2c and 2d as the third direction D3. The first direction D1, the third direction D3, and the second direction D2 are approximately orthogonal to each other.

[0031] End faces 2a and 2b extend along a third direction D3, connecting to main faces 2c and 2d. End faces 2a and 2b also extend along a second direction D2, connecting to side faces 2e and 2f. Main faces 2c and 2d extend along a first direction D1, connecting to end faces 2a and 2b. Main faces 2c and 2d also extend along a second direction D2, connecting to side faces 2e and 2f. Side faces 2e and 2f extend along a first direction D1, connecting to end faces 2a and 2b. Side faces 2e and 2f also extend along a third direction D3, connecting to main faces 2c and 2d.

[0032] Main surface 2d is the mounting surface of the body 2, for example, the surface opposite to other electronic devices when the coil component 1 is mounted to other electronic devices (e.g., circuit substrates, or stacked electronic components, not shown). End surfaces 2a and 2b are continuous surfaces from the mounting surface (i.e., main surface 2d).

[0033] The length of the base body 2 in the first direction D1 is longer than the length of the base body 2 in the third direction D3 and the length of the base body 2 in the second direction D2. The length of the base body 2 in the third direction D3 is shorter than the length of the base body 2 in the second direction D2. That is, in this embodiment, the end faces 2a, 2b, the main faces 2c, 2d, and the side faces 2e, 2f are rectangular. The length of the base body 2 in the third direction D3 can be equal to or longer than the length of the base body 2 in the second direction D2.

[0034] Furthermore, in this embodiment, "equal" can mean not only equal, but also values ​​that include minor differences or manufacturing errors within a predetermined range. For example, multiple values ​​are defined as equal as long as they are within ±5% of the average of the multiple values.

[0035] like Figure 3 As shown, the substrate 2 has a structure formed by stacking multiple substrate layers on a third direction D3. In this embodiment, the substrate 2 is composed of nine substrate layers 21 to 29. That is, the stacking direction of the substrate 2 is consistent with the third direction D3. Wiring portions 6, 7, 8a to 8f constituting the coil conductor 5 are embedded in substrate layers 22 to 28. As explained by the manufacturing method described later, the substrate 2 can be manufactured by sequentially stacking substrate layers 22 to 29 on substrate layer 21. In the actual substrate 2, the multiple substrate layers 21 to 29 can be integrated to the point where the boundaries between the layers are indistinguishable, or they can be integrated to the point where the boundaries between the layers are distinguishable.

[0036] Each substrate layer 21-29 is primarily composed of an insulating material, such as a resin material. The resin material may include, for example, at least one selected from liquid crystal polymers, polyimide resins, crystalline polystyrene, epoxy resins, acrylic resins, bismaleimide resins, and fluorinated resins. The resin material may or may not contain fillers. Fillers may be inorganic fillers, for example. Examples of inorganic fillers include silicon dioxide. Furthermore, each substrate layer 21-29 may also be composed of a magnetic material. Magnetic materials may include, for example, Ni-Cu-Zn ferrite materials, Ni-Cu-Zn-Mg ferrite materials, or Ni-Cu ferrite materials. Magnetic materials may also include, for example, Fe alloys. Each substrate layer 21-29 may also contain a non-magnetic material, which may be a glass-ceramic material or a dielectric material. Each wiring portion 6, 7, 8a-8f is composed of a conductive material (e.g., Cu).

[0037] The substrate layer 21 is composed solely of the aforementioned insulating material. The substrate layer 21 is located at the bottom of the substrate 2 and forms the main surface 2c.

[0038] like Figure 3 and Figure 4 As shown, a plurality of second wiring portions 6 (lower wiring portions) are embedded in the substrate layer 22. In this embodiment, the substrate layer 22 includes three second wiring portions 6. The plurality of second wiring portions 6 extend parallel to the first direction D1 and have the same length in the first direction D1. In this embodiment, the plurality of second wiring portions 6 have the same length (width W) in the second direction D2. The plurality of second wiring portions 6 are arranged at equal intervals in the second direction D2. The plurality of second wiring portions 6 are disposed separately from the end faces 2a, 2b and the side faces 2e, 2f of the substrate 2. One end 6a of each second wiring portion 6 in its extension direction is located near the end face 2a, and the other end 6b is located near the end face 2b. Because the substrate layer 22 is stacked directly above the substrate layer 21 constituting the main face 2c, the plurality of second wiring portions 6 are located on the main face 2c side of the substrate 2. In the following description, the substrate layer 22 is also referred to as the first substrate layer.

[0039] like Figure 3 and Figure 5 As shown, wiring portions 8a to 8d (support conductors) are embedded in the substrate layers 23 to 26, respectively, and the wiring portions 8a to 8d constitute a support portion 8 extending along the third direction D3. The wiring portions 8a to 8d are all provided at the same position in any of the substrate layers 23 to 26, and overlap each other in the third direction D3. In the following description, substrate layers 23 to 26 are also referred to as the second substrate layer.

[0040] Each wiring section 8a to 8d is composed of multiple pairs arranged in the first direction D1, and in this embodiment, it is composed of three pairs. Specifically, each wiring section 8a to 8d is arranged in two columns along the second direction D2, and is arranged at equal intervals in the second direction D2. In the following description, the column on the end face 2a side of the wiring sections 8a to 8d arranged in two columns is also referred to as the first column 8A, and the column on the end face 2b side is also referred to as the second column 8B. The wiring sections 8a to 8d of the first column 8A are positioned at positions corresponding to one end 6a of the second wiring section 6, and the wiring sections 8a to 8d of the second column 8B are positioned at positions corresponding to the other end 6b of the second wiring section 6.

[0041] In this embodiment, each wiring section 8a to 8d is composed of multiple conductors. Specifically, each wiring section 8a to 8d is composed of four conductors 8', 8”, 8”’, and 8”” arranged in a grid pattern along the first direction D1 and the second direction D2. Viewed from the third direction D3, each conductor 8' to 8”” may also be approximately rectangular (e.g., approximately square). Viewed from the third direction D3, each conductor 8' to 8”” may also be a polygon other than a circle, ellipse, or quadrilateral.

[0042] Regarding dimensions, each of the rectangular wiring portions 8a to 8d, viewed from a third direction towards D3, has a first directional length and a second directional length that are the same as the width W of the second wiring portion 6. The four conductors 8', 8”, 8”’, and 8”” have the same first directional length L1 and second directional length L2, both of which are shorter than half the width W of the second wiring portion 6 (L1 < W / 2, L2 < W / 2).

[0043] like Figure 3 and Figure 6As shown, a plurality of first wiring portions 7 are embedded in the substrate layer 27. In this embodiment, the substrate layer 27 includes two first wiring portions 7. In the following description, the substrate layer 27 is also referred to as the third substrate layer. Each first wiring portion 7 has a pair of ends 7a, 7b and an inclined portion 7c disposed between the pair of ends 7a, 7b. The pair of ends 7a, 7b and the inclined portion 7c are configured to be continuous, and the pair of ends 7a, 7b are located on both sides of the inclined portion 7c in the first direction D1. The pair of ends 7a, 7b are composed of a first end 7a located near the end face 2a of the substrate 2 and a second end 7b located near the end face 2b of the substrate 2. Viewed from the third direction D3, the pair of ends 7a, 7b are offset from each other in the second direction D2. In this embodiment, viewed from the third direction D3, the first end 7a is located at a position closer to the side 2f than the second end 7b. The inclined portion 7c extends in a direction inclined at a predetermined angle relative to the first direction D1, and connects a pair of ends 7a and 7b that are offset from each other in the second direction D2. The inclination angle relative to the first direction D1 is the same in all the first wiring portions 7. That is, the inclined portions 7c of the first wiring portions 7 are parallel to each other.

[0044] Viewed from a third party to D3, the first end 7a of the first wiring section 7 overlaps with one end 6a of one or more second wiring sections 6 in the first column 8A of wiring sections 8a-8d. Viewed from a third party to D3, the second end 7b of the first wiring section 7 overlaps with one end 6b of one or more second wiring sections 6 in the second column 8B of wiring sections 8a-8d. In this embodiment, both the first end 7a and the second end 7b of the first wiring section 7 have a second-direction length that is the same as the width W of the second wiring section 6. In this embodiment, the second end 7b of the first wiring section 7A of the two first wiring sections 7 overlaps with the first wiring section 8a-8d from the side 2f of the wiring sections 8a-8d of the second column 8B, and also overlaps with the end 6b of the first second wiring section 6 from the side 2f. The first end 7a overlaps with the second wiring section 8a-8d from the side 2f of the wiring sections 8a-8d of the first column 8A, and also overlaps with the end 6a of the second second wiring section 6 from the side 2f. Similarly, the second end 7b of the first wiring section 7B in the two first wiring sections 7 overlaps with the second wiring section 8a-8d from the side 2f in the wiring sections 8a-8d of the second column 8B, and overlaps with the end 6b of the second second wiring section 6 from the side 2f. The first end 7a overlaps with the third wiring section 8a-8d from the side 2f in the wiring sections 8a-8d of the first column 8A, and overlaps with the end 6a of the third second wiring section 6 from the side 2f.

[0045] Additionally, a pair of wiring portions 8e (first lead-out wiring portions) are embedded in the substrate layer 27. One of the pair of wiring portions 8e is positioned to overlap with one of the wiring portions 8a-8d in the first column 8A, and the other of the pair of wiring portions 8e is positioned to overlap with one of the wiring portions 8a-8d in the second column 8B. In this embodiment, one of the pair of wiring portions 8e overlaps with the first wiring portion 8a-8d from the side 2f among the wiring portions 8a-8d in the first column 8A, and also overlaps with the end 6a of the first second wiring portion 6 from the side 2f, forming the end 5a of the coil conductor 5. The other of the pair of wiring portions 8e overlaps with the third wiring portion 8a-8d from the side 2f among the wiring portions 8a-8d in the second column 8B, and also overlaps with the end 6b of the third second wiring portion 6 from the side 2f, forming the end 5b of the coil conductor 5. Viewed from a third party to D3, each rectangular wiring section 8e has a first direction length and a second direction length that are the same as the width W of the second wiring section 6.

[0046] like Figure 3 and Figure 7 As shown, a pair of wiring portions 8f (second lead-out wiring portions) are embedded in the substrate layer 28. The pair of wiring portions 8f are positioned to overlap with the pair of wiring portions 8e of the substrate layer 27. Among the pair of wiring portions 8f, the wiring portions 8f on the end face 2a side and the side face 2f side constitute the end 5a of the coil conductor 5, and the wiring portions 8f on the end face 2b side and the side face 2e side constitute the end 5b of the coil conductor 5. In the following description, the substrate layer 28 is also referred to as the fourth substrate layer.

[0047] Viewed from a third-party direction D3, each rectangular wiring section 8f has a first-direction length and a second-direction length that are the same as the width W of the second wiring section 6. In this embodiment, each wiring section 8f is composed of multiple conductors. Specifically, similar to wiring sections 8a to 8d, each wiring section 8f is composed of four conductors 8', 8”, 8”’, and 8”” arranged in a grid pattern along the first direction D1 and the second direction D2.

[0048] like Figure 3 and Figure 8As shown, a pair of bottom electrodes 3 and 4 (terminal electrodes) are provided on the substrate layer 29. From the viewpoint of manufacturing sequence, the substrate layer 29 is located at the top of the substrate 2, forming the main surface 2d. In other words, a pair of bottom electrodes 3 and 4 are provided on the main surface 2d of the substrate 2. In the following description, the substrate layer 29 is also referred to as the fifth substrate layer. Viewed from the third direction D3, the pair of bottom electrodes 3 and 4 are both rectangular. The pair of bottom electrodes 3 and 4 may also be of the same shape and size. In this embodiment, the pair of bottom electrodes 3 and 4 are arranged along the first direction D1. The bottom electrode 3 located on the end face 2a side of the substrate 2 overlaps with the wiring portions 8f on the end face 2a side and the side face 2f side of the pair of wiring portions 8f of the substrate layer 28, and the bottom electrode 4 located on the end face 2b side of the substrate 2 overlaps with the wiring portions 8f on the end face 2b side and the side face 2e side of the pair of wiring portions 8f of the substrate layer 28. A pair of bottom electrodes 3 and 4 are embedded inside the substrate 2 (more specifically, inside the substrate layer 29) and exposed from the main surface 2d. The pair of bottom electrodes 3 and 4 may also be partially or entirely disposed on the main surface 2d of the substrate 2.

[0049] Coil component 1 can be passed through Figure 9 The manufacturing process is carried out according to the flowchart shown.

[0050] First, as the first step S1, a substrate layer 21 and a first substrate layer 22 are prepared. In the first step S1, the first substrate layer 22 is stacked on the substrate layer 21. Alternatively, a first substrate layer 22 can be prepared in advance and stacked on the substrate layer 21.

[0051] Next, as the second step S2, second substrate layers 23 to 26 are sequentially stacked on the first substrate layer 22. As in this embodiment, when there are multiple layers of second substrate layers 23 to 26, the second step S2 is repeated multiple times. That is, when there are N layers of second substrate layers, the second step S2 is repeated N times. When there is a single layer of second substrate layers, the second step S2 is performed only once and does not need to be repeated.

[0052] Then, as a third step S3, a third substrate layer 27 is stacked on the second substrate layers 23-26 (specifically, on the uppermost second substrate layer 26). Then, as a fourth step S4, a fourth substrate layer 28 is stacked on the third substrate layer 27. Finally, as a fifth step S5, a fifth substrate layer 29 is stacked on the fourth substrate layer 28. The bottom electrodes 3 and 4 may be pre-positioned on the fifth substrate layer 29 before or after it is stacked.

[0053] Next, refer to Figure 1 , 2 Sections 10 and 10 will describe the support section 8 of this embodiment.

[0054] In this embodiment, the support column 8 is formed by stacking the wiring columns 8a to 8d of each of the body layers 23 to 26. The support column 8 is composed of multiple pairs arranged in pairs along the first direction D1, and in this embodiment, it is composed of three pairs. Similar to the wiring columns 8a to 8d, the three pairs of support columns 8 are arranged along the second direction D2 as two columns: a first column 8A and a second column 8B.

[0055] like Figure 10 As shown, the support portion 8 is connected to both ends 6a and 6b of the second wiring portion 6. Specifically, end 6a of the second wiring portion 6 is connected to one end of the support portion 8 (the end on the main surface 2c side), and end 6b of the second wiring portion 6 is also connected to one end of the support portion 8. The support portion 8 extends from both ends 6a and 6b of the second wiring portion 6 toward the main surface 2d of the body 2. In other words, one second wiring portion 6 is mounted on two support portions 8.

[0056] In this embodiment, one end of the first support portion 8 from the side 2f of the first column 8A is connected to the end 6a of the first second wiring portion 6 from the side 2f, and the other end is connected to the bottom electrode 3 provided on the main surface 2d via wiring portions 8e and 8f that constitute the end 5a of the coil conductor 5. One end of the second to third support portions 8 from the side 2f of the first column 8A is connected to the end 6a of the second to third second wiring portions 6 from the side 2f, and the other end is connected to the first end 7a of the first to second first wiring portions 7 from the side 2f, respectively.

[0057] In this embodiment, one end of the first and second support sections 8 from the side 2f of the second column 8B is connected to the end 6b of the first and second second wiring sections 6 from the side 2f, respectively, and the other end is connected to the second end 7b of the first and second first wiring sections 7 from the side 2f, respectively. One end of the third support section 8 from the side 2f of the second column 8B is connected to the end 6b of the third second wiring section 6 from the side 2f, and the other end is connected to the bottom electrode 4 provided on the main surface 2d via wiring sections 8e and 8f that constitute the end 5b of the coil conductor 5.

[0058] Here, each wiring section 8a to 8d is composed of four conductors 8', 8”, 8”', and 8””, therefore, as Figure 11As shown, each support section 8 is composed of four segmented supports 9 formed by stacking four conductors 8', 8”, 8”’, and 8””. The four segmented supports 9 have the same length (third-direction length), with one end connected to the end 6a or 6b of the second wiring section 6, and the other end connected to the end 7a, 7b, or wiring section 8e of the first wiring section 7. That is, by using four segmented supports 9 running parallel along the third-direction D3, each support section 8 and its total length are divided into four. In other words, the entirety of each support section 8 becomes a branch section 10 divided into four parallel branches running along its extension direction (third-direction D3).

[0059] When the coil component 1 is applied to a high-frequency circuit, AC resistance (loss) may be generated in the coil conductor 5 due to the skin effect and proximity effect. In the shunt section 10 of the support section 8, the aforementioned AC resistance is reduced by utilizing the shunt, thereby suppressing the loss of the coil conductor 5 and thus increasing the self-resonant frequency of the coil component 1.

[0060] Regarding the self-resonant frequency of coil component 1, the inventors performed the following simulation.

[0061] As an example, a coil component 1 having the above-described structure is prepared, and as a comparative example, a coil component 1 having the above-described structure is prepared. Figure 12 The coil component shown has the same coil conductor as the coil conductor 5 of the coil component 1, except that each support section 8 is not branched.

[0062] Then, the self-resonant frequencies of the coil components in both the embodiment and the comparative example were determined through simulation. The simulations were performed using AnsysHFSS (a three-dimensional electromagnetic field simulation software) manufactured by ANSYS, and the results are as follows: Figure 13 As shown.

[0063] As the simulation results show, the self-resonant frequency of the coil component in the embodiment is higher than that of the coil component in the comparative example. Based on these results, it is confirmed that the self-resonant frequency of the coil component 1 is increased by including the shunt section 10 in the support section 8.

[0064] As explained above, in the coil component 1 described above, the support portion 8 of the coil conductor 5 becomes the shunt portion 10 as a whole, and a high self-resonant frequency is achieved by reducing losses in the shunt portion 10.

[0065] Furthermore, when the coil conductor 5 includes a conductor (such as a through-hole conductor) extending along the direction of the coil axis (second direction D2), the direction of the current changes drastically in such a conductor, thereby increasing the resistance. However, in the coil component 1 described above, the coil conductor 5 becomes a seamless winding structure that does not include a conductor extending along the direction of the coil axis (second direction D2), thus achieving a further reduction in AC resistance (loss).

[0066] Regarding the branch section 10 of the support section 8, the entire support section 8 can also be a branch section 10, such as... Figure 14 As shown, it can also be a branch section 10 partially disposed in its extending direction (third direction D3). Figure 14 In the support section 8 shown, one end side connected to the ends 6a and 6b of the second wiring section 6 becomes a branch section 10, while the other end side connected to the ends 7a and 7b of the first wiring section 7 or the wiring section 8e does not become a branch section. Figure 14 The support section 8 shown can be formed by the following: the wiring sections 8a to 8c described above are composed of four conductors 8', 8”, 8”', and 8””, and the remaining wiring section 8d is composed of an undivided conductor.

[0067] Furthermore, if the branch section is included in the coil conductor 5, it does not necessarily need to be included in the support section 8; it can also be included in the first wiring section 7 or the second wiring section 6. The branch section 10 can be included only in the support section 8, only in the first wiring section 7, or only in the second wiring section 6. Alternatively, the branch section 10 can be included in multiple (e.g., two) of the support section 8, the first wiring section 7, and the second wiring section 6, or all of the support section 8, the first wiring section 7, and the second wiring section 6 can be branch sections 10, meaning the coil conductor 5 is branched as a whole. Furthermore, the branch section 10 can be included in all (e.g., all three pairs) of the support section 8, or only in a portion (e.g., one pair, one). Similarly, the branch section 10 can be included in all of the first wiring section 7 and the second wiring section 6, or only in a portion of the support section 8. Furthermore, the number of branches in the branch section is not limited to four and can be increased or decreased as appropriate.

[0068] Figure 15 This is a three-dimensional view of a coil conductor 5 with two branches in the branch section 10 of the support section 8. Figure 15 In the coil conductor 5 shown, the wiring portions 8a-8d of the second body layers 23-26 and the wiring portion 8f of the fourth body layer 28 are different from those of the coil conductor 5 described above; the other structures are the same or identical. Specifically, as... Figure 16 , Figure 17 As shown, each wiring section 8a to 8d and 8f is composed of a pair of rectangular conductors 8' and 8" extending along the second direction D2 and arranged in the first direction D1. When viewed from the third direction D3, each conductor 8' and 8" may also be a polygon shape other than a circle, ellipse, or quadrilateral.

[0069] A pair of conductors 8' and 8" have the same first directional length L1 and second directional length L2. The first directional length L1 is shorter than half the width W of the second wiring portion 6 (L1 < W / 2), and the second directional length L2 is the same as or shorter than the width W of the second wiring portion 6 (L2 ≦ W).

[0070] Figure 18 It means in Figure 15 The diagram shows a perspective view of the coil conductor 5, in which the first wiring section 7 and the second wiring section 6 are further branched. Figure 18 In the coil conductor 5 shown, the second wiring portion 6 of the first body layer 22 and the first wiring portion 7 of the third body layer 27 are connected to... Figure 15 The coil conductor 5 shown is different, while the others have the same or identical structure. Specifically, as... Figure 19 As shown, each second wiring section 6 is divided into two along its total length by two parallel branch wirings 11 running along the first direction D1. In other words, the entirety of each second wiring section 6 becomes a branch section 10 divided into two parallel branch sections running along its extension direction (first direction D1). Similarly, as... Figure 20 As shown, each first wiring section 7 is divided into two along its total length using two dividing wiring lines 12. In other words, the entirety of each first wiring section 7 becomes two branch sections 10 that are branched into parallel branches along their extension direction. Figure 18 In the coil conductor 5 shown, the number of branches "2" in the branch section 10 of the support section 8 is the same as the number of branches "2" in the branch section 10 of the second wiring section 6 and the first wiring section 7.

[0071] exist Figure 18 In the coil conductor 5 shown, the branch section 10 of the support section 8 can also be changed. For example, by adopting Figure 5 , 7 The wiring sections 8a to 8d and 8f, as shown, consist of four conductors 8', 8”, 8”', and 8””. Figure 21 As shown in the coil conductor 5, it is able to... Figure 18 The number of branches in the branch section 10 of the support portion 8 of the coil conductor 5 shown is increased to "4". Figure 21 In the coil conductor 5 shown, the number of branches in the branch section 10 of the support section 8 is different from the number of branches in the branch section 10 of the second wiring section 6 and the first wiring section 7. The number of branches in the branch section 10 of the support section 8 is "4" more than the number of branches in the branch section 10 of the second wiring section 6 and the first wiring section 7 is "2".

Claims

1. A coil component, wherein, have: The body has a mounting surface, a pair of end faces facing each other in a first direction parallel to the mounting surface, and a pair of side faces facing each other in a second direction parallel to the mounting surface and orthogonal to the first direction. A pair of terminal electrodes are disposed on the mounting surface of the substrate; as well as A coil conductor, disposed within the body, includes a plurality of first wiring portions extending parallel to the mounting surface; a plurality of second wiring portions extending parallel to the mounting surface and along a first direction and side-by-side along a second direction on a side further away from the mounting surface than the first wiring portions; and a plurality of pairs of support portions extending from both ends of each of the plurality of second wiring portions toward the mounting surface along a third direction orthogonal to the first and second directions, with each end portion extending to the mounting surface and connected to the pair of terminal electrodes. At least one of the first wiring portion, the second wiring portion, and the support portion of the coil conductor includes multiple branch portions that are branched into parallel branches along the extension direction.

2. The coil component according to claim 1, wherein, The support section includes the branch section.

3. The coil component according to claim 2, wherein, A portion of the support section is the branch section.

4. The coil component according to claim 2 or 3, wherein, The branch section of the support column is divided into four branches.

5. The coil component according to claim 1, wherein, At least one of the first wiring section and the second wiring section includes the branch section.

6. The coil component according to claim 1, wherein, The first wiring section, the second wiring section, and the support section all include the branch section.

7. The coil component according to claim 6, wherein, The number of branches in the branch section of the support section is different from the number of branches in the branch sections of the first wiring section and the second wiring section.

8. The coil component according to claim 7, wherein, The number of branches in the branch section of the support section is greater than the number of branches in the branch sections of the first wiring section and the second wiring section.

9. The coil component according to any one of claims 1 to 8, wherein, The substrate has a stacked structure consisting of multiple insulating layers stacked along the third direction.

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