Inductor Components

Abstract

To provide an inductor component capable of suppressing occurrence of crack caused by a stress residual in the vicinity of a lead-out wire in a manufacturing process.SOLUTION: An inductor component 1A comprises: an element assembly 10; a coil 20 provided in the element assembly 10 and spirally wound in a coil axis direction; a first external electrode 30a electrically connected to one end of the coil 20 and exposed on a surface of the element assembly 10; and a second external electrode 30b electrically connected to the other end of the coil 20 and exposed on the surface of the element assembly 10. The element assembly 10 includes an insulator, and the coil 20 is configured by electrically connecting a plurality of coil wires laminated in the coil axis direction. The plurality of coil wires includes a first coil wire 21a which is electrically connected to the first external electrode 30a via at least one first lead-out wire 22aa. A dimension of each first lead-out wire 22aa in the coil axis direction is smaller than a dimension of the first coil wire 21a in the coil axis direction.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an inductor component. [Background technology]

[0002] Patent Document 1 discloses a method for manufacturing an inductor component, the method comprising the steps of preparing a photosensitive insulating paste and a conductive paste containing a filler material made of quartz, a glass material, and a resin material; applying the insulating paste to form a first insulating layer; exposing the first insulating layer to light while blocking a first portion of the first insulating layer with a mask; removing the first portion of the first insulating layer to form a groove in a position corresponding to the first portion, the groove depth being greater than the groove width; applying the conductive paste into the groove to form a coil conductor layer in the groove; and applying the insulating paste onto the first insulating layer and the coil conductor layer to form a second insulating layer. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6787286 Summary of the Invention [Problem to be solved by the invention]

[0004] According to the manufacturing method of an inductor component described in Patent Document 1, it is possible to increase the aspect ratio and cross-sectional area of ​​the coil conductor layer, thereby improving the coil characteristics.

[0005] However, the inventors have found through their investigations that when attempting to form an inductor component having coil wiring with a large aspect ratio or cross-sectional area, as in Patent Document 1, large stresses are likely to remain near the lead-out wiring that connects the coil wiring to the external electrodes during firing in the manufacturing process. Therefore, if the aspect ratio or cross-sectional area of ​​the coil wiring is further increased or the inductor component is made smaller, this residual stress can cause interfacial peeling between the lead-out wiring and the element body (insulating layer), which can ultimately result in cracks.

[0006] The present invention has been made to solve the above-mentioned problems, and aims to provide an inductor component that can suppress the occurrence of cracks caused by stress remaining near the lead-out wiring during the manufacturing process. [Means for solving the problem]

[0007] In a first aspect, an inductor component of the present invention comprises an element body, a coil disposed inside the element body and wound spirally along the coil axis direction, a first external electrode electrically connected to one end of the coil and exposed on the surface of the element body, and a second external electrode electrically connected to the other end of the coil and exposed on the surface of the element body, wherein the element body includes an insulator, the coil is formed by electrically connecting multiple coil wirings stacked in the coil axis direction, the multiple coil wirings including first coil wirings electrically connected to the first external electrode via at least one first lead wiring, and the dimension of each of the first lead wirings in the coil axis direction is smaller than the dimension of the first coil wiring in the coil axis direction.

[0008] In a second aspect, an inductor component of the present invention comprises an element body, a coil disposed inside the element body and wound spirally along a coil axis direction, a first external electrode electrically connected to one end of the coil and exposed on the surface of the element body, and a second external electrode electrically connected to the other end of the coil and exposed on the surface of the element body, wherein the element body includes an insulator, the coil is formed by electrically connecting multiple coil wirings stacked in the coil axis direction, the multiple coil wirings including a first coil wiring electrically connected to the first external electrode via at least one first extraction wiring, and when viewed from a longitudinal direction perpendicular to the coil axis direction, both ends of the first extraction wiring and both ends of the first external electrode are offset from each other in the coil axis direction.

[0009] In a third aspect, an inductor component of the present invention comprises an element body, a coil provided inside the element body and wound spirally along a coil axis direction, a first external electrode electrically connected to one end of the coil and exposed on a surface of the element body, and a second external electrode electrically connected to the other end of the coil and exposed on a surface of the element body, wherein the element body includes an insulator, and the surface of the element body includes a bottom surface perpendicular to the coil axis direction and a top surface opposite to the bottom surface in the coil axis direction, and the first external electrode and the second external electrode are exposed at least at the bottom surface of the element body so as to be spaced apart from each other, and the coil is made up of a plurality of coils stacked in the coil axis direction. the plurality of coil wirings are electrically connected to one another, and the plurality of coil wirings include a first coil wiring electrically connected to the first external electrode via at least one first lead wiring and a second coil wiring electrically connected to the second external electrode via at least one second lead wiring, the first lead wiring is located closer to the top surface of the element body than the second lead wiring in the coil axis direction, and when viewed from a length direction perpendicular to the coil axis direction, a minimum distance between an end of the first lead wiring and an end of the first external electrode is greater than a minimum distance between an end of the second lead wiring and an end of the second external electrode in a width direction perpendicular to the coil axis direction and the length direction.

[0010] In the inductor component of the present invention, when viewed from the coil axis direction, the wiring that extends toward the external electrode while tilting with respect to the linear portion of the coil wiring in the path where the coil wiring connects to the external electrode is defined as the lead-out wiring. In this case, when viewed from the coil axis direction, the coil wiring and the lead-out wiring are not on the same straight line with their connection point as the boundary. Note that if no wiring that corresponds to the lead-out wiring defined above is found when viewed from the coil axis direction, the wiring that does not overlap the winding portion of the coil (protruding from the winding portion of the coil) when viewed from the coil axis direction is defined as the lead-out wiring. [Effects of the Invention]

[0011] According to the present invention, it is possible to provide an inductor component that can suppress the occurrence of cracks due to stress remaining in the vicinity of the lead wiring during the manufacturing process. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a schematic perspective view showing an example of an inductor component according to a first embodiment of the present invention. [Figure 2] FIG. 2 is a schematic perspective view showing an example of an exploded state of the inductor component shown in FIG. [Figure 3] FIG. 3 is a schematic cross-sectional view showing an example of a cross section of the inductor component shown in FIG. 1 taken along line a1-a2. [Figure 4] FIG. 4 is a schematic perspective view showing an example of an inductor component according to a second embodiment of the present invention. [Figure 5] FIG. 5 is a schematic cross-sectional view showing an example of a cross section of the inductor component shown in FIG. 4 taken along line b1-b2. [Figure 6] FIG. 6 is a cross-sectional schematic diagram showing an example of a configuration in which three first escape wirings are arranged in the coil axis direction in contrast to the configuration shown in FIG. [Figure 7] FIG. 7 is a cross-sectional view showing an example of a configuration in which four first escape wirings are arranged in the coil axis direction, in contrast to the configuration shown in FIG. [Figure 8] FIG. 8 is a schematic cross-sectional view showing a modification of the configuration shown in FIG. [Figure 9] FIG. 9 is a schematic cross-sectional view showing another modified example of the configuration shown in FIG. [Figure 10] FIG. 10 is a schematic cross-sectional view showing a modification of the configuration shown in FIG. [Figure 11] FIG. 11 is a schematic cross-sectional view showing another modified example of the configuration shown in FIG. [Figure 12] FIG. 12 is a schematic cross-sectional view showing yet another modified example of the configuration shown in FIG. [Figure 13] FIG. 13 is a schematic perspective view showing an example of an inductor component according to a third embodiment of the present invention. [Figure 14] FIG. 14 is a schematic cross-sectional view showing an example of a cross section of the inductor component shown in FIG. 13 taken along line c1-c2. [Figure 15] FIG. 15 is a schematic cross-sectional view showing an example of a cross section of the inductor component shown in FIG. 13 taken along line segment d1-d2. [Figure 16] FIG. 16 is a schematic perspective view showing an example of an inductor component according to a fourth embodiment of the present invention. [Figure 17] FIG. 17 is a schematic cross-sectional view showing an example of a cross section of the inductor component shown in FIG. 16 taken along line e1-e2. [Figure 18] FIG. 18 is a schematic cross-sectional view showing an example of a cross section of the inductor component shown in FIG. 16 taken along line f1-f2. [Figure 19] FIG. 19 is a schematic perspective view showing an example of an inductor component according to a fifth embodiment of the present invention. [Figure 20] FIG. 20 is a schematic cross-sectional view showing an example of a cross section of the inductor component shown in FIG. 19 taken along line g1-g2. [Figure 21] FIG. 21 is a schematic perspective view showing an example of an inductor component according to a modified example of the fifth embodiment of the present invention. [Figure 22] FIG. 22 is a schematic cross-sectional view showing an example of a cross section of the inductor component shown in FIG. 21 taken along line h1-h2. [Figure 23]FIG. 23 is a schematic cross-sectional view showing an example of a cross section of the inductor component shown in FIG. 21 taken along line j1-j2. [Figure 24] FIG. 24 is a schematic perspective view showing an example of an inductor component according to a sixth embodiment of the present invention. [Figure 25] FIG. 25 is a schematic perspective view showing an example of an inductor component according to a seventh embodiment of the present invention. [Figure 26] FIG. 26 is a schematic cross-sectional view showing an example of a cross section of the inductor component shown in FIG. 25 taken along line segment k1-k2. [Figure 27] FIG. 27 is a schematic perspective view showing an example of an inductor component according to an eighth embodiment of the present invention. [Figure 28] FIG. 28 is a schematic cross-sectional view showing an example of a cross section of the inductor component shown in FIG. 27 taken along line m1-m2. [Figure 29] FIG. 29 is a schematic cross-sectional view showing an example of a cross section of the inductor component shown in FIG. 27 taken along line n1-n2. DETAILED DESCRIPTION OF THE INVENTION

[0013] The inductor component of the present invention will be described below. Note that the present invention is not limited to the following configurations and may be modified as appropriate without departing from the spirit of the present invention. Furthermore, a combination of multiple individual preferred configurations described below also constitutes the present invention.

[0014] The following embodiments are merely examples, and it goes without saying that partial substitution or combination of the configurations shown in different embodiments is possible. From embodiment 2 onwards, descriptions of matters common to embodiment 1 will be omitted, and differences will be mainly described. In particular, similar effects due to similar configurations will not be mentioned one after the other for each embodiment.

[0015] In the following description, when no particular distinction is made between the embodiments, they will simply be referred to as "the inductor component of the present invention."

[0016] The drawings shown below are schematic diagrams, and the dimensions, aspect ratio, scale, etc. may differ from those of the actual product.

[0017] In this specification, terms indicating the relationship between elements (e.g., "parallel," "perpendicular," "orthogonal," etc.) and terms indicating the shape of elements not only mean the literal and strict form, but also mean a range that is substantially equivalent, for example, a range that includes a difference of about a few percent.

[0018] In a first aspect, an inductor component of the present invention comprises an element body, a coil disposed inside the element body and wound spirally along the coil axis direction, a first external electrode electrically connected to one end of the coil and exposed on the surface of the element body, and a second external electrode electrically connected to the other end of the coil and exposed on the surface of the element body, wherein the element body includes an insulator, the coil is formed by electrically connecting multiple coil wirings stacked in the coil axis direction, the multiple coil wirings including first coil wirings electrically connected to the first external electrode via at least one first lead wiring, and the dimension of each of the first lead wirings in the coil axis direction is smaller than the dimension of the first coil wiring in the coil axis direction.

[0019] [Embodiment 1] An example of a first aspect of the inductor component of the present invention will be described below as an inductor component of embodiment 1. In the inductor component of embodiment 1 of the present invention, the first coil wiring is electrically connected to the first external electrode via one first lead wiring.

[0020] FIG. 1 is a schematic perspective view showing an example of an inductor component according to a first embodiment of the present invention.

[0021] The inductor component 1A shown in FIG. 1 includes an element body 10, a coil 20, a first external electrode 30a, and a second external electrode 30b.

[0022] In this specification, the length direction, height direction, and width direction are defined as directions L, T, and W, respectively, as shown in Fig. 1 etc. Here, the length direction L, height direction T, and width direction W are perpendicular to each other.

[0023] 1, in inductor component 1A, the surface of element body 10 includes end faces 11a and 11b facing in length direction L, top face 12a and bottom face 12b facing in height direction T, and side faces 13a and 13b facing in width direction W. In inductor component 1A, width direction W is parallel to the coil axis direction of coil 20. That is, in inductor component 1A, the surface of element body 10 includes bottom face 12b parallel to the coil axis direction and top face 12a facing bottom face 12b in height direction T perpendicular to the coil axis direction.

[0024] In this embodiment, the coil axis direction is parallel to the width direction W unless otherwise specified.

[0025] In inductor component 1A, bottom surface 12b of element body 10 is the mounting surface. More specifically, bottom surface 12b of element body 10 is the mounting surface that faces an object to be mounted (e.g., a substrate) when inductor component 1A is mounted. Therefore, in inductor component 1A, the mounting surface of element body 10, i.e., bottom surface 12b of element body 10, is parallel to the coil axis direction.

[0026] At least one of the surfaces of the element body 10, i.e., end surface 11a, end surface 11b, top surface 12a, bottom surface 12b, side surface 13a, and side surface 13b, may be marked to make each surface easier to identify.

[0027] The end faces 11a and 11b of the element body 10 do not need to be strictly perpendicular to the length direction L. Furthermore, the top face 12a and bottom face 12b of the element body 10 do not need to be strictly perpendicular to the height direction T. Furthermore, the side faces 13a and 13b of the element body 10 do not need to be strictly perpendicular to the width direction W.

[0028] As shown in FIG. 1, the element body 10 has, for example, a rectangular parallelepiped shape.

[0029] In this specification, the rectangular parallelepiped shape may refer to any shape that can be said to be substantially rectangular parallelepiped, and includes, for example, a roughly rectangular parallelepiped shape with rounded corners and ridges as described below.

[0030] It is preferable that the corners and ridges of the element body 10 are rounded. A corner of the element body 10 is a portion where three faces of the element body 10 intersect. A ridge of the element body 10 is a portion where two faces of the element body 10 intersect.

[0031] FIG. 2 is a schematic perspective view showing an example of an exploded state of the inductor component shown in FIG.

[0032] The element body 10 includes an insulator. In the example shown in Fig. 2, the insulator is formed by stacking a plurality of insulating layers in the coil axis direction.

[0033] 2, the multiple insulating layers include insulating layer 15a, insulating layer 15b, insulating layer 15c, insulating layer 15d, insulating layer 15e, insulating layer 15f, and insulating layer 15g. Insulating layer 15a, insulating layer 15b, insulating layer 15c, insulating layer 15d, insulating layer 15e, insulating layer 15f, and insulating layer 15g are stacked in order from side surface 13b toward side surface 13a of element body 10 in the coil axis direction.

[0034] Note that multiple insulating layers are integrated together, and the boundaries between them may not appear clearly.

[0035] The plurality of insulating layers may further include at least one other insulating layer in addition to the insulating layers described above. For example, at least one insulating layer may be present between insulating layer 15a and insulating layer 15b in the coil axis direction. Also, at least one insulating layer may be present between insulating layer 15f and insulating layer 15g in the coil axis direction.

[0036] Examples of insulating materials that constitute the insulator (insulating layer) include glass materials containing borosilicate glass as a main component, ceramic materials, organic materials such as epoxy resins, fluororesins, and polymer resins, and composite materials such as glass epoxy resins. As the insulating material, materials with small dielectric constants and dielectric losses are particularly preferred.

[0037] The insulating materials constituting the plurality of insulating layers may be the same as each other, may be different from each other, or may be partially different from each other.

[0038] The dimensions of the insulating layers in the coil axis direction may be the same as each other, may be different from each other, or may be partially different from each other.

[0039] As shown in FIG. 1, the coil 20 is provided inside the element body 10 and is wound spirally along the coil axis direction.

[0040] The coil axis direction of the coil 20 is the direction in which the coil axis CA of the coil 20 extends, and is parallel to the bottom surface 12b, which is the mounting surface of the element body 10, as described above.

[0041] As shown in FIGS. 1 and 2, the coil 20 is formed by electrically connecting a plurality of coil wires stacked in the coil axis direction.

[0042] In the example shown in FIGS. 1 and 2, the plurality of coil wirings includes a first coil wiring 21a and a second coil wiring 21b.

[0043] Of the multiple coil wires, the first coil wire 21a is located at the outermost position on the side surface 13a side of the element body 10 in the coil axis direction.

[0044] In the example shown in FIG. 2, the first coil wiring 21a is formed by stacking a first coil conductor layer 121aa and a first coil conductor layer 121ab in the coil axis direction.

[0045] In the first coil wiring 21a, in addition to the first coil conductor layer described above, at least one other coil conductor layer may be further stacked in the coil axis direction.

[0046] The first coil wiring 21a may have a single-layer structure or a multi-layer structure.

[0047] Of the multiple coil wirings, the second coil wiring 21b is located at the outermost position on the side surface 13b side of the element body 10 in the coil axis direction.

[0048] In the example shown in FIG. 2, the second coil wiring 21b is formed by stacking a second coil conductor layer 121ba and a second coil conductor layer 121bb in the coil axis direction.

[0049] In the second coil wiring 21b, in addition to the second coil conductor layer described above, at least one other coil conductor layer may be further stacked in the coil axis direction.

[0050] The second coil wiring 21b may have a single-layer structure or a multi-layer structure.

[0051] At least one other coil wiring may be present between the first coil wiring 21a and the second coil wiring 21b in the coil axis direction.

[0052] Examples of conductive materials that form the coil wiring include Ag, Au, Cu, Pd, Ni, Al, and alloys containing at least one of these metals.

[0053] The conductive materials constituting the multiple coil wirings may be the same as each other, may be different from each other, or may be partially different from each other.

[0054] The dimensions of the multiple coil wires in the coil axis direction may be the same as each other, may be different from each other, or may be partially different.

[0055] For multiple coil wirings, the dimensions in a direction perpendicular to the direction in which the coil wiring extends when viewed from the coil axis direction, i.e., the widths when viewed from the coil axis direction, may be the same as each other, may be different from each other, or may be different in some areas.

[0056] Among the multiple coil wirings, adjacent coil wirings in the coil axis direction may be electrically connected via a connecting conductor that penetrates an insulating layer between the adjacent coil wirings in the coil axis direction. In other words, the coil 20 may be formed by stacking multiple coil wirings in the coil axis direction and electrically connecting them via a connecting conductor.

[0057] In the example shown in FIG. 2, the first coil wiring 21a and the second coil wiring 21b are electrically connected via a connection conductor 29a that passes through the insulating layer 15d in the coil axis direction.

[0058] In the example shown in FIG. 2, the connecting conductor 29a is made of a connecting conductor layer 129aa.

[0059] In the connection conductor 29a, in addition to the connection conductor layer 129aa, at least one other connection conductor layer may be stacked in the coil axis direction.

[0060] The connecting conductor 29a may have a single-layer structure or a multi-layer structure.

[0061] Examples of conductive materials that form the connecting conductor include Ag, Au, Cu, Pd, Ni, Al, and alloys containing at least one of these metals.

[0062] As described above, there may be at least one other coil wiring between the first coil wiring 21a and the second coil wiring 21b in the coil axis direction. In other words, the coil 20 may be composed of three or more coil wirings, including the first coil wiring 21a, the second coil wiring 21b, and at least one other coil wiring. However, by adjusting the position of the connecting conductor, it is possible to compose the coil 20 using only the first coil wiring 21a and the second coil wiring 21b.

[0063] When viewed from the coil axial direction, the coil 20 may have a shape consisting of only straight portions, a shape consisting of only curved portions, or a shape consisting of straight and curved portions. For example, when viewed from the coil axial direction, the coil 20 may have a polygonal shape, a circular shape, or an elliptical shape.

[0064] 1, the first external electrode 30a is electrically connected to one end of the coil 20. More specifically, as shown in FIG. 1, the first coil wiring 21a constituting the coil 20 is electrically connected to the first external electrode 30a via one first escape wiring 22aa.

[0065] In the example shown in FIG. 2, the first escape routing 22aa is made up of a first escape conductor layer 122aa.

[0066] In the first escape wiring 22aa, in addition to the first escape conductor layer 122aa, at least one other escape conductor layer may be stacked in the coil axis direction.

[0067] The first escape routing 22aa may have a single-layer structure or a multi-layer structure.

[0068] 1, the second external electrode 30b is electrically connected to the other end of the coil 20. More specifically, as shown in FIG. 1, the second coil wiring 21b constituting the coil 20 may be electrically connected to the second external electrode 30b via one second escape wiring 22ba.

[0069] In the example shown in FIG. 2, the second escape routing 22ba is made up of a second escape conductor layer 122ba.

[0070] In the second escape wiring 22ba, in addition to the second escape conductor layer 122ba, at least one other escape conductor layer may be stacked in the coil axis direction.

[0071] The second escape routing 22ba may have a single-layer structure or a multi-layer structure.

[0072] Examples of conductive materials that form the lead wiring include Ag, Au, Cu, Pd, Ni, Al, and alloys containing at least one of these metals.

[0073] The conductive materials forming the first escape routing 22aa and the second escape routing 22ba may be the same as or different from each other.

[0074] As shown in FIG. 1, the first external electrode 30a is exposed on the surface of the element body .

[0075] As shown in FIG. 1, the first external electrode 30a is preferably exposed at least on the bottom surface 12b of the element body .

[0076] 1, the first external electrode 30a extends from part of the bottom surface 12b to part of the end surface 11a of the element body 10. In other words, in the example shown in Fig. 1, the first external electrode 30a is exposed not only on part of the bottom surface 12b of the element body 10 but also on part of the end surface 11a of the element body 10.

[0077] The first external electrode 30a may be exposed only on the bottom surface 12b of the element body .

[0078] In the example shown in FIG. 2, the first external electrode 30a is formed by stacking a first external conductor layer 130aa, a first external conductor layer 130ab, a first external conductor layer 130ac, a first external conductor layer 130ad, and a first external conductor layer 130ae in the coil axis direction.

[0079] In the first external electrode 30a, in addition to the above-described first external conductor layer, at least one other external conductor layer may be further laminated in the coil axis direction.

[0080] The first external electrode 30a may have a single-layer structure or a multi-layer structure.

[0081] As shown in FIG. 1, the second external electrode 30b is exposed on the surface of the element body .

[0082] As shown in FIG. 1, the second external electrode 30b is preferably exposed at least on the bottom surface 12b of the element body .

[0083] 1, the second external electrode 30b extends from part of the bottom surface 12b to part of the end surface 11b of the element body 10. In other words, in the example shown in Fig. 1, the second external electrode 30b is exposed not only on part of the bottom surface 12b of the element body 10 but also on part of the end surface 11b of the element body 10.

[0084] The second external electrode 30b may be exposed only on the bottom surface 12b of the element body .

[0085] In the example shown in FIG. 2, the second external electrode 30b is formed by stacking a second external conductor layer 130ba, a second external conductor layer 130bb, a second external conductor layer 130bc, a second external conductor layer 130bd, and a second external conductor layer 130be in the coil axis direction.

[0086] In the second external electrode 30b, in addition to the second external conductor layer described above, at least one other external conductor layer may be further laminated in the coil axis direction.

[0087] The second external electrode 30b may have a single-layer structure or a multi-layer structure.

[0088] As described above, it is preferable that the first external electrode 30a and the second external electrode 30b are exposed and spaced apart from each other at least on the bottom surface 12b of the element body 10. In the example shown in Fig. 1, the first external electrode 30a and the second external electrode 30b are provided so as to be spaced apart from each other in a direction (here, length direction L) perpendicular to the coil axis direction.

[0089] Furthermore, if the first external electrode 30a and the second external electrode 30b are exposed on the bottom surface 12b of the element body 10, which is the mounting surface, the mountability of the inductor component 1A is likely to be improved.

[0090] In the example shown in FIG. 1, the dimension of the first external electrode 30a in the coil axis direction is smaller than the dimension of the element body 10 in the coil axis direction.

[0091] The dimension of the first external electrode 30a in the coil axis direction may be the same as the dimension of the element body 10 in the coil axis direction.

[0092] In the example shown in FIG. 1, the dimension of the second external electrode 30b in the coil axis direction is smaller than the dimension of the element body 10 in the coil axis direction.

[0093] The dimension of the second external electrode 30b in the coil axis direction may be the same as the dimension of the element body 10 in the coil axis direction.

[0094] Examples of conductive materials that can be used to form the external electrodes include Ag, Au, Cu, Pd, Ni, Al, and alloys containing at least one of these metals.

[0095] The first external electrode 30a may have, in this order from the coil 20 side, a base electrode containing the above-mentioned conductive material (for example, Ag), a Ni-plated electrode, and a Sn-plated electrode. In this case, in the first external electrode 30a, the base electrode may form an integral surface with the surface of the element body 10 (in FIG. 1, the end face 11a and bottom face 12b of the element body 10), and the Ni-plated electrode and the Sn-plated electrode may protrude from the surface of the element body 10 (in FIG. 1, the end face 11a and bottom face 12b of the element body 10) so as to cover the base electrode.

[0096] The second external electrode 30b may have, in this order from the coil 20 side, a base electrode containing the above-mentioned conductive material (for example, Ag), a Ni-plated electrode, and a Sn-plated electrode. In this case, in the second external electrode 30b, the base electrode may form an integral surface with the surface of the element body 10 (in FIG. 1, the end face 11b and bottom face 12b of the element body 10), and the Ni-plated electrode and the Sn-plated electrode may protrude from the surface of the element body 10 (in FIG. 1, the end face 11b and bottom face 12b of the element body 10) so as to cover the base electrode.

[0097] The conductive materials that make up the first external electrode 30a and the second external electrode 30b may be the same as or different from each other.

[0098] Fig. 3 is a cross-sectional schematic diagram showing an example of a cross section taken along line a1-a2 of the inductor component shown in Fig. 1. More specifically, Fig. 3 shows a cross section of the inductor component 1A that includes the boundary between the first coil wiring 21a and the first escape wiring 22aa.

[0099] As shown in FIG. 3, the dimension W22aa of the first escape wiring 22aa in the coil axis direction is smaller than the dimension W21a of the first coil wiring 21a in the coil axis direction.

[0100] In the inductor component 1A, the dimension W22aa of the first escape routing 22aa in the coil axis direction is smaller than the dimension W21a of the first coil routing 21a in the coil axis direction, which suppresses stress remaining near the first escape routing 22aa during firing in the manufacturing process. Therefore, in the inductor component 1A, interfacial peeling between the first escape routing 22aa and the element body 10 caused by stress remaining near the first escape routing 22aa is suppressed, and as a result, cracks are suppressed.

[0101] Meanwhile, in the manufacturing process, the surface of the inductor component, particularly the element body, is subjected to impact loads, for example, from the collision of abrasives during polishing (e.g., barrel polishing) to round the corners and ridges of the element body, and chemical erosion loads from the penetration of plating solution during plating to form external electrodes. Therefore, in the manufacturing process, external loads such as these impact loads and chemical erosion loads act as triggers, and combined with stress remaining near the lead wires during firing, these can easily cause interfacial peeling between the lead wires and the element body, which can ultimately lead to cracks. In contrast, in the inductor component 1A, the dimension W22aa in the coil axis direction of the first escape wiring 22aa is smaller than the dimension W21a in the coil axis direction of the first coil wiring 21a, so that the stress remaining near the first escape wiring 22aa during firing in the manufacturing process is suppressed.As a result, even if external loads such as the above-mentioned impact loads and chemical corrosion loads are applied to the inductor component 1A, interfacial peeling between the first escape wiring 22aa and the element body 10 triggered by the external load is less likely to occur, and as a result, cracks are less likely to occur.

[0102] As described above, the inductor component 1A can provide an inductor component that can suppress the occurrence of cracks due to stress remaining near the first escape routing 22aa during the manufacturing process.

[0103] According to the inductor component 1A, residual stress near the first lead wiring 22aa can be suppressed during firing in the manufacturing process, and therefore, even if an attempt is made to improve the coil characteristics by increasing at least one of the aspect ratio and cross-sectional area of ​​the coil wiring (e.g., the first coil wiring 21a), the occurrence of cracks can be suppressed.

[0104] The first escape wiring 22aa may have at least a portion whose dimension in the coil axis direction is smaller than that of the first coil wiring 21a. In other words, the first escape wiring 22aa may have a portion whose dimension in the coil axis direction is smaller than that of the first coil wiring 21a over a part of the first escape wiring 22aa or over the entire first escape wiring 22aa in the extension direction of the first escape wiring 22aa.

[0105] The dimension of the coil wiring in the coil axis direction is defined as the maximum dimension in the coil axis direction in a cross section perpendicular to the direction in which the coil wiring extends. Note that even if the outer shape of the coil wiring is uneven when viewed in the cross section of the coil wiring, the dimension of the coil wiring in the coil axis direction is defined as the maximum dimension in the coil axis direction in a state in which the unevenness is included.

[0106] The dimension of the lead wiring in the coil axis direction is defined as the maximum dimension in the coil axis direction in a cross section perpendicular to the extension direction of the lead wiring. Note that even if the outer shape of the lead wiring is uneven when viewed in the cross section of the lead wiring, the dimension of the lead wiring in the coil axis direction is defined as the maximum dimension in the coil axis direction in a state including the unevenness. Note that if the dimension of the lead wiring in the coil axis direction varies partially along the extension direction of the lead wiring (for example, see embodiment 3 described below), the cross section of the lead wiring is defined for each part where the dimension of the lead wiring in the coil axis direction varies.

[0107] As shown in FIG. 1, it is preferable that the first coil wiring 21a and the first lead wiring 22aa are connected at a corner portion D, which corresponds to the point where the first lead wiring 22aa begins to extend at an angle from the straight portion of the first coil wiring 21a when viewed from the coil axis direction.

[0108] In the inductor component 1A, the first coil wiring 21a and the first escape wiring 22aa are connected at the corners, where stress is likely to remain during firing in the manufacturing process. This means that the first coil wiring 21a and the first escape wiring 22aa, which has a smaller dimension in the coil axis direction than the first coil wiring 21a, are connected at the corners, thereby suppressing residual stress at the corners. Therefore, in the inductor component 1A, even if an external load is applied to the top surface 12a of the element body 10, interfacial peeling between the first escape wiring 22aa and the element body 10, which is triggered by the external load, is suppressed, and as a result, cracks are suppressed.

[0109] In this specification, the term "draw-out wiring" refers to wiring that extends toward the external electrode while being inclined with respect to the linear portion of the coil wiring in the path where the coil wiring is connected to the external electrode when viewed from the coil axis direction (for example, the example shown in Figure 1). In this case, when viewed from the coil axis direction, the coil wiring and the draw-out wiring are not on the same straight line with their connection point as the boundary. Note that if no wiring that corresponds to the draw-out wiring defined above is found when viewed from the coil axis direction, the draw-out wiring is wiring that does not overlap the winding portion of the coil (protrudes from the winding portion of the coil) when viewed from the coil axis direction (for example, an example different from Figure 1).

[0110] 1, in the inductor component 1A, the second coil wiring 21b may be electrically connected to the second external electrode 30b via one second escape wiring 22ba. In this case, as shown in FIG. 1, the dimension of the second escape wiring 22ba in the coil axis direction is preferably smaller than the dimension of the second coil wiring 21b in the coil axis direction.

[0111] Other aspects of the second escape routing 22ba are preferably similar to those of the first escape routing 22aa described above.

[0112] The inductor component 1A is manufactured, for example, by the following method.

[0113] <Step of Producing Mother Laminate> First, an insulating paste layer that will later become the insulating layer 15a is formed by repeatedly applying an insulating paste containing a glass material, etc., whose main component is borosilicate glass, by screen printing or the like.

[0114] Next, a photosensitive conductive paste layer is formed on the insulating paste layer by applying a photosensitive conductive paste containing, for example, Ag as a main metal component by screen printing, etc. Furthermore, the photosensitive conductive paste layer is irradiated with ultraviolet light or the like through a photomask and then developed with an alkaline solution or the like to form, at multiple locations on the insulating paste layer, a coil conductor layer that will later become the second coil conductor layer 121ba, external conductor layers that will later become the first external conductor layer 130aa and the second external conductor layer 130ba, and an extraction conductor layer that is connected to the coil conductor layer and the external conductor layer and will later become the second extraction conductor layer 122ba.

[0115] In addition, when forming the coil conductor layer, the lead-out conductor layer, and the external conductor layer, instead of exposure using a photomask, for example, DI exposure (also called direct image exposure or direct writing) without using a photomask may be performed.

[0116] Next, for example, a photosensitive insulating paste is applied by screen printing or the like to form insulating paste layers that will later become insulating layer 15b and insulating layer 15c on the insulating paste layer that will later become insulating layer 15a. Furthermore, the insulating paste layer that will later become insulating layer 15c is irradiated with ultraviolet light or the like through a photomask, and then developed with an alkaline solution or the like to form via holes and openings in the insulating paste layer that will later become insulating layer 15c. The via holes formed here partially overlap the coil conductor layer that will later become the second coil conductor layer 121ba, but do not overlap the extension conductor layer that will later become the second extension conductor layer 122ba, and have the same shape as the coil conductor layer that will later become the second coil conductor layer 121bb. The openings formed here overlap the external conductor layers that will later become the first external conductor layer 130aa and the second external conductor layer 130ba.

[0117] When forming the insulating paste layer provided with the via holes and openings, for example, DI exposure without using a photomask may be performed instead of exposure using a photomask.

[0118] Next, a new photosensitive conductive paste layer is formed inside the via holes and openings, for example, by applying a photosensitive conductive paste containing Ag as a main metal component, by screen printing or the like, and on the insulating paste layer that will later become insulating layer 15c. Furthermore, the photosensitive conductive paste layer is irradiated with ultraviolet light or the like through a photomask, and then developed with an alkaline solution or the like, to form a coil conductor layer that will later become second coil conductor layer 121bb inside the via holes, and a connection conductor layer that will later become connection conductor layer 129aa connected to this coil conductor layer. Furthermore, an external conductor layer that will later become first external conductor layer 130ab connected to the external conductor layer that will later become first external conductor layer 130aa is formed inside the openings, and an external conductor layer that will later become first external conductor layer 130ac is formed on this external conductor layer. Furthermore, an external conductor layer that will later become the second external conductor layer 130bb is formed inside the opening, connected to the external conductor layer that will later become the second external conductor layer 130ba, and an external conductor layer that will later become the second external conductor layer 130bc is formed on this external conductor layer.

[0119] When forming the coil conductor layer, the connection conductor layer, and the external conductor layer, for example, DI exposure without using a photomask may be performed instead of exposure using a photomask.

[0120] Next, for example, a photosensitive insulating paste is applied by screen printing or the like to form insulating paste layers that will later become insulating layer 15d and insulating layer 15e on the insulating paste layer that will later become insulating layer 15c. Furthermore, the insulating paste layer that will later become insulating layer 15e is irradiated with ultraviolet light or the like through a photomask, and then developed with an alkaline solution or the like to form via holes and openings in the insulating paste layer that will later become insulating layer 15e. The via holes formed here overlap the connection conductor layer that will later become connecting conductor layer 129aa and have the same shape as the coil conductor layer that will later become first coil conductor layer 121aa. The openings formed here overlap the external conductor layers that will later become first outer conductor layer 130ac and second outer conductor layer 130bc.

[0121] Next, a photosensitive conductive paste containing, for example, Ag as a main metal is applied by screen printing or the like to form a new photosensitive conductive paste layer inside the via holes and openings, and on the insulating paste layer that will later become insulating layer 15e. Furthermore, the photosensitive conductive paste layer is irradiated with ultraviolet light or the like through a photomask, and then developed with an alkaline solution or the like to form a coil conductor layer that will later become first coil conductor layer 121aa inside the via holes, and a coil conductor layer that will later become first coil conductor layer 121ab connected to this coil conductor layer is formed. Furthermore, an external conductor layer that will later become first external conductor layer 130ad connected to the external conductor layer that will later become first external conductor layer 130ac is formed inside the openings, and an external conductor layer that will later become first external conductor layer 130ae is formed on this external conductor layer. Furthermore, an external conductor layer that will later become the second external conductor layer 130bd and that is connected to the external conductor layer that will later become the second external conductor layer 130bc is formed inside the opening, and an external conductor layer that will later become the second external conductor layer 130be is formed on this external conductor layer. Furthermore, an extension conductor layer that will later become the first extension conductor layer 122aa and that is connected to the coil conductor layer that will later become the first coil conductor layer 121ab and the external conductor layer that will later become the first external conductor layer 130ae is formed on the insulating paste layer that will later become the insulating layer 15e.

[0122] Finally, an insulating paste containing a glass material, the main component of which is borosilicate glass, is repeatedly applied by screen printing or the like to form insulating paste layers that will later become insulating layers 15f and 15g.

[0123] In this way, a mother laminate is produced.

[0124] The method for forming the conductor patterns of the coil conductor layer, the lead-out conductor layer, the connection conductor layer, and the external conductor layer is not limited to the photolithography method described above, and may be, for example, a method in which a conductive paste is printed and laminated using a screen printing plate having openings in the shape of the conductor pattern, a method in which a conductor film is formed by a sputtering method, a vapor deposition method, a foil pressing method, or the like, and then the conductor film is etched to form the shape of the conductor pattern, or a method in which a negative pattern is formed by a semi-additive method, and then a plating film is formed, and then unnecessary portions of the plating film are removed by etching or the like to form the shape of the conductor pattern.

[0125] When forming the conductor patterns of the coil conductor layer, the lead conductor layer, the connection conductor layer, and the external conductor layer, forming the conductor patterns in multiple stages allows for a high aspect ratio, thereby reducing loss due to resistance at high frequencies. The method for forming the conductor patterns in multiple stages is not particularly limited, and may include, for example, a method of repeatedly overlapping conductor patterns by repeating steps using photolithography as described above, a method of repeatedly overlapping conductor patterns formed by a semi-additive method, a method of overlapping, in no particular order, a conductor pattern formed by a semi-additive method and a conductor pattern formed by etching a separately plated film, or a method of further plating a plated film formed by a semi-additive method.

[0126] The conductive material constituting the conductor patterns of the coil conductor layer, the lead-out conductor layer, the connection conductor layer, and the external conductor layer is not limited to the photosensitive conductive paste containing Ag or the like as the main metal component, but may also be a conductor containing a metal such as Ag, Au, or Cu formed by, for example, a sputtering method, a vapor deposition method, a foil pressing method, a plating method, or the like.

[0127] The method for forming the insulating paste layer is not limited to the photolithography method described above, and may be, for example, a method of pressing a sheet made of an insulating material, a method of spin-coating an insulating material, or a method of spray-coating an insulating material.

[0128] The method for forming the insulating paste layer having via holes and openings is not limited to the photolithography method described above, and may be, for example, a method in which an insulating film is formed by pressing a sheet made of an insulating material, spin coating an insulating material, spray coating an insulating material, or the like, and then the insulating film is subjected to laser processing, drilling, or the like to form via holes and openings.

[0129] The insulating material constituting the insulating paste layer is not limited to the glass material containing borosilicate glass as the main component, but may be, for example, a ceramic material, an organic material such as an epoxy resin, a fluororesin, or a polymer resin, a composite material such as a glass epoxy resin, etc. As the insulating material, a material with a small dielectric constant and dielectric loss is particularly preferable.

[0130] <Process for forming element body, coil, and external electrodes> First, the mother laminate is cut by dicing or the like to be separated into a plurality of unfired laminates.

[0131] The unsintered laminate has an insulating paste laminate portion formed by laminating insulating paste layers, a coil conductor laminate portion formed by laminating coil conductor layers so that adjacent coil conductor layers are electrically connected via connecting conductor layers, and an external conductor laminate portion formed by laminating external conductor layers.

[0132] When the green laminate is cut into individual pieces, for example, the external conductor laminated portion is exposed at two locations on the bottom surface of at least the insulating paste laminated portion included in the cut surface of the green laminate.

[0133] Next, the unfired laminate is fired to produce a laminate.

[0134] When the green laminate is fired, the insulating paste layers become insulating layers, and the insulating paste laminate portion becomes the element body 10. When the green laminate is fired, the coil conductor layers become coil wiring, and the coil conductor laminate portion becomes the coil 20. When the green laminate is fired, one of the two external conductor laminate portions becomes part of the first external electrode 30a, and the other becomes part of the second external electrode 30b.

[0135] Next, the obtained laminate may be subjected to, for example, barrel polishing to round the corners and ridges of the element body 10.

[0136] Finally, using the two fired external conductor laminated portions as base electrodes, Ni-plated electrodes and Sn-plated electrodes are formed in this order on the surfaces of the respective base electrodes by plating. The thicknesses of the Ni-plated electrodes and Sn-plated electrodes are, for example, 2 μm or more and 10 μm or less.

[0137] In this way, the first external electrode 30a and the second external electrode 30b are formed, each having a base electrode, a Ni-plated electrode, and a Sn-plated electrode in this order from the surface side of the element body 10. In this case, in the first external electrode 30a, the base electrode may be integral with the surface of the element body 10 (in FIG. 1, the end face 11a and the bottom face 12b of the element body 10), and the Ni-plated electrode and the Sn-plated electrode may protrude from the surface of the element body 10 (in FIG. 1, the end face 11a and the bottom face 12b of the element body 10) so as to cover the base electrode. In addition, in the second external electrode 30b, the base electrode may be integral with the surface of the element body 10 (in FIG. 1, the end face 11b and the bottom face 12b of the element body 10), and the Ni-plated electrode and the Sn-plated electrode may protrude from the surface of the element body 10 (in FIG. 1, the end face 11b and the bottom face 12b of the element body 10) so as to cover the base electrode.

[0138] The method for forming the external electrode is not limited to the method of plating the external conductor laminate portion exposed on the cut surface of the unsintered laminate (e.g., at least the bottom surface of the insulating paste laminate portion) as described above, but may also be a method of exposing the external conductor laminate portion on the cut surface of the unsintered laminate (e.g., at least the bottom surface of the insulating paste laminate portion) as described above, and then immersing (dipping) the exposed portion of the external conductor laminate portion in a conductive paste, or forming a film of conductive paste on the exposed portion of the external conductor laminate portion by a sputtering method, and then plating the same.

[0139] In this way, the inductor component 1A is manufactured.

[0140] The inductor component 1A is manufactured to have, for example, a 0402 (0.4 mm×0.2 mm×0.2 mm) size. The size of the inductor component 1A is not limited to the 0402 (0.4 mm×0.2 mm×0.2 mm) size.

[0141] [Embodiment 2] In the inductor component according to the second embodiment of the present invention, the first coil wiring is electrically connected to the first external electrode via a plurality of first lead wirings arranged in the coil axis direction. Except for this, the inductor component according to the second embodiment of the present invention is similar to the inductor component according to the first embodiment of the present invention.

[0142] FIG. 4 is a schematic perspective view showing an example of an inductor component according to a second embodiment of the present invention.

[0143] In the inductor component 1B shown in FIG. 4, the first coil wiring 21a is electrically connected to the first external electrode 30a via two first escape wirings 22aa and 22ab arranged side by side in the coil axis direction.

[0144] Fig. 5 is a cross-sectional view schematically illustrating an example of a cross section taken along line b1-b2 of the inductor component shown in Fig. 4. More specifically, Fig. 5 illustrates a cross section of the inductor component 1B that includes the boundary between the first coil wiring 21a and the first escape wiring 22aa and the boundary between the first coil wiring 21a and the first escape wiring 22ab.

[0145] As shown in FIG. 5, the dimension W22aa of the first escape routing 22aa in the coil axis direction and the dimension W22ab of the first escape routing 22ab in the coil axis direction are each smaller than the dimension W21a of the first coil routing 21a in the coil axis direction.

[0146] 4 and 5 show an example of a configuration in which two first escape wirings are arranged in the coil axis direction, but three or more first escape wirings may be arranged in the coil axis direction. In the following, an example of a configuration in which three or four first escape wirings are arranged in the coil axis direction will be shown.

[0147] FIG. 6 is a cross-sectional schematic diagram showing an example of a configuration in which three first escape wirings are arranged in the coil axis direction in contrast to the configuration shown in FIG.

[0148] As shown in FIG. 6, the three first escape wirings include the first escape wiring 22aa and the first escape wiring 22ab, as well as a first escape wiring 22ac located between the first escape wiring 22aa and the first escape wiring 22ab in the coil axis direction.

[0149] As shown in FIG. 6, the dimension W22aa of the first escape wiring 22aa in the coil axis direction, the dimension W22ab of the first escape wiring 22ab in the coil axis direction, and the dimension W22ac of the first escape wiring 22ac in the coil axis direction are each smaller than the dimension W21a of the first coil wiring 21a in the coil axis direction.

[0150] FIG. 7 is a cross-sectional view showing an example of a configuration in which four first escape wirings are arranged in the coil axis direction, in contrast to the configuration shown in FIG.

[0151] As shown in FIG. 7, the four first escape wirings include the first escape wiring 22aa, the first escape wiring 22ab, and the first escape wiring 22ac, as well as the first escape wiring 22ad located between the first escape wiring 22ab and the first escape wiring 22ac in the coil axis direction.

[0152] As shown in FIG. 7, the dimension W22aa in the coil axis direction of the first escape wiring 22aa, the dimension W22ab in the coil axis direction of the first escape wiring 22ab, the dimension W22ac in the coil axis direction of the first escape wiring 22ac, and the dimension W22ad in the coil axis direction of the first escape wiring 22ad are each smaller than the dimension W21a in the coil axis direction of the first coil wiring 21a.

[0153] As described above, in an inductor component (e.g., inductor component 1B) in which the first coil wiring 21a is electrically connected to the first external electrode 30a via multiple first lead wirings arranged in the coil axis direction, the increase in DC resistance (Rdc) is suppressed compared to an inductor component (e.g., inductor component 1A) in which the first coil wiring 21a is electrically connected to the first external electrode 30a via a single first lead wiring.

[0154] As shown in FIGS. 5, 6, and 7, the dimensions of the plurality of first escape wirings in the coil axis direction are preferably the same.

[0155] In the example shown in FIG. 5, the dimension W22aa of the first escape routing 22aa in the coil axis direction and the dimension W22ab of the first escape routing 22ab in the coil axis direction are the same.

[0156] In the example shown in FIG. 6, the dimension W22aa of the first escape routing 22aa in the coil axis direction, the dimension W22ab of the first escape routing 22ab in the coil axis direction, and the dimension W22ac of the first escape routing 22ac in the coil axis direction are all the same.

[0157] In the example shown in FIG. 7, the dimension W22aa of the first escape routing 22aa in the coil axis direction, the dimension W22ab of the first escape routing 22ab in the coil axis direction, the dimension W22ac of the first escape routing 22ac in the coil axis direction, and the dimension W22ad of the first escape routing 22ad in the coil axis direction are all the same.

[0158] As described above, in an inductor component in which the dimensions of the first escape wirings in the coil axis direction are the same, an increase in DC resistance is suppressed compared to an inductor component in which the dimensions of the first escape wirings in the coil axis direction are different from each other or are partially different. Furthermore, in an inductor component in which the dimensions of the first escape wirings in the coil axis direction are the same from each other, it is easier to form the first escape wirings and to design the pattern of the coil 20.

[0159] The dimensions of the plurality of first escape routings in the coil axis direction may be different from one another or may be partially different from one another.

[0160] Fig. 8 is a schematic cross-sectional view showing a modified example of the configuration shown in Fig. 5. Fig. 9 is a schematic cross-sectional view showing another modified example of the configuration shown in Fig. 5.

[0161] 8 and 9, the first escape routing 22aa is located closer to the surface of the element body 10 (see FIG. 4) than the first escape routing 22ab in the coil axis direction. In the following, the first escape routing 22aa is taken as an example of a first outer escape routing in the inductor component of the present invention.

[0162] As shown in FIGS. 8 and 9, the first escape routing 22ab is located more inward in the coil axis direction than the first escape routing 22aa in the element body 10 (see FIG. 4).

[0163] In this specification, "one wiring is located more inwardly of the element body than the other wiring" means that, for the same surface of the element body, the distance in the coil axis direction between one wiring and the surface of the element body is greater than the distance in the coil axis direction between the other wiring and the surface of the element body. More specifically, "one wiring is located more inwardly of the element body than the other wiring" means that, in the coil axis direction, the minimum distance between one wiring and the surface of the element body is greater than the minimum distance between the other wiring and the surface of the element body.

[0164] 8 and 9, the first escape routing 22ab is farther from the surface (side surface 13a in FIG. 4) of the element body 10 (see FIG. 4) in the coil axis direction than the first escape routing 22aa. Hereinafter, the first escape routing 22ab will be taken as an example of a first inner escape routing in the inductor component of the present invention.

[0165] As shown in FIGS. 8 and 9, the dimension W22aa of the first escape routing 22aa in the coil axis direction and the dimension W22ab of the first escape routing 22ab in the coil axis direction may be different from each other.

[0166] In the example shown in FIG. 8, the dimension W22aa of the first escape routing 22aa in the coil axis direction is smaller than the dimension W22ab of the first escape routing 22ab in the coil axis direction.

[0167] In the example shown in FIG. 9, the dimension W22ab of the first escape routing 22ab in the coil axis direction is smaller than the dimension W22aa of the first escape routing 22aa in the coil axis direction.

[0168] FIG. 10 is a schematic cross-sectional view showing a modification of the configuration shown in FIG.

[0169] 10, the first escape routing 22ac is located between the first escape routing 22aa and the first escape routing 22ab in the coil axis direction so as to be adjacent to both of them. Hereinafter, the first escape routing 22ac will be referred to as an example of a first intermediate escape routing in the inductor component of the present invention.

[0170] As shown in FIG. 10, the dimension W22aa of the first escape routing 22aa in the coil axis direction, the dimension W22ab of the first escape routing 22ab in the coil axis direction, and the dimension W22ac of the first escape routing 22ac in the coil axis direction may be partially different.

[0171] 10, the dimension W22ab in the coil axis direction of the first escape routing 22ab and the dimension W22ac in the coil axis direction of the first escape routing 22ac are the same, whereas the dimension W22aa in the coil axis direction of the first escape routing 22aa is smaller than the dimension W22ab in the coil axis direction of the first escape routing 22ab and the dimension W22ac in the coil axis direction of the first escape routing 22ac.

[0172] As described above, in an inductor component in which the dimensions of multiple first escape wirings in the coil axis direction are different from each other or differ in some parts, the stress remaining in the vicinity of the first escape wiring during firing in the manufacturing process is more likely to be suppressed in the path to which an external load (especially a chemical erosion load) is applied.

[0173] In this case, if the dimension W22aa of the first escape wiring 22aa in the coil axis direction is smaller than the dimension W22ab of the first escape wiring 22ab in the coil axis direction, the dimension W22aa of the first escape wiring 22aa in the coil axis direction near the surface (here, the side surface 13a) of the element body 10, which is likely to be subjected to external loads (especially chemical erosion loads), becomes smaller, thereby suppressing the stress remaining near the first escape wiring 22aa during firing in the manufacturing process, and particularly, the stress in the path near the first escape wiring 22aa to which external loads (especially chemical erosion loads) are applied is more likely to be suppressed.

[0174] Furthermore, if the dimension W22ab of the first escape routing 22ab in the coil axis direction is smaller than the dimension W22aa of the first escape routing 22aa in the coil axis direction, good coil characteristics are more likely to be ensured.

[0175] As shown in FIGS. 6 and 7, when there are three or more first escape wirings, the intervals between the first escape wirings in the coil axis direction are preferably the same.

[0176] In the example shown in FIG. 6, the distance Xa between the first escape routing 22aa and the first escape routing 22ac in the coil axis direction and the distance Xb between the first escape routing 22ab and the first escape routing 22ac in the coil axis direction are the same.

[0177] In the example shown in FIG. 7, the distance Xa between the first escape wiring 22aa and the first escape wiring 22ac in the coil axis direction, the distance Xc between the first escape wiring 22ac and the first escape wiring 22ad in the coil axis direction, and the distance Xd between the first escape wiring 22ab and the first escape wiring 22ad in the coil axis direction are all the same.

[0178] As described above, in an inductor component in which the spacing between the first escape wires in the coil axis direction is the same, stress remaining near the first escape wire during firing in the manufacturing process is suppressed in a path to which an external load (particularly a chemical corrosion load) is applied, compared to an inductor component in which the spacing between the first escape wires in the coil axis direction is different or partially different. Furthermore, in an inductor component in which the spacing between the first escape wires in the coil axis direction is the same, the formation of the first escape wires is facilitated and the degree of freedom in pattern design of the coil 20 is increased.

[0179] The intervals between the plurality of first escape routings in the coil axis direction may be different from each other or may be partially different.

[0180] Fig. 11 is a schematic cross-sectional view showing another modified example of the configuration shown in Fig. 6. Fig. 12 is a schematic cross-sectional view showing yet another modified example of the configuration shown in Fig. 6.

[0181] As shown in FIGS. 11 and 12, the distance Xa between the first escape routing 22aa and the first escape routing 22ac in the coil axis direction and the distance Xb between the first escape routing 22ab and the first escape routing 22ac in the coil axis direction may be different from each other.

[0182] In the example shown in FIG. 11, the distance Xa between the first escape routing 22aa and the first escape routing 22ac in the coil axis direction is larger than the distance Xb between the first escape routing 22ab and the first escape routing 22ac in the coil axis direction.

[0183] In the example shown in FIG. 12, the distance Xb between the first escape routing 22ab and the first escape routing 22ac in the coil axis direction is larger than the distance Xa between the first escape routing 22aa and the first escape routing 22ac in the coil axis direction.

[0184] As described above, in an inductor component in which the spacing between multiple first escape wirings in the coil axis direction is different from each other or is different in some parts, the stress remaining near the first escape wiring during firing in the manufacturing process is more likely to be suppressed in the path to which an external load (especially a chemical erosion load) is applied.

[0185] In this case, if the distance Xa in the coil axis direction between the first escape wiring 22aa and the first escape wiring 22ac is larger than the distance Xb in the coil axis direction between the first escape wiring 22ab and the first escape wiring 22ac, the escape wiring is prevented from becoming densely packed in the region close to the surface (here, the side surface 13a) of the element body 10, and therefore, during firing in the manufacturing process, residual stress near the escape wiring (especially the first escape wiring 22aa) is suppressed in the region close to the surface (here, the side surface 13a) of the element body 10.

[0186] Furthermore, if the distance Xb between the first escape routing 22ab and the first escape routing 22ac in the coil axis direction is larger than the distance Xa between the first escape routing 22aa and the first escape routing 22ac in the coil axis direction, good coil characteristics are more likely to be ensured.

[0187] The spacing in the coil axis direction between the two lead-out wirings is defined as the distance in the coil axis direction between the outermost end of one lead-out wiring on the side of the other lead-out wiring in the cross section of the lead-out wiring for which the dimensions in the coil axis direction described above are determined, and the outermost end of one lead-out wiring on the side of the other lead-out wiring in the cross section of the other lead-out wiring for which the dimensions in the coil axis direction described above are determined.

[0188] As shown in Figures 5, 6, 7, 8, 9, 10, 11, and 12, when viewed from the longitudinal direction L perpendicular to the coil axis direction, it is preferable that one end E21a of the first coil wiring 21a (here, the end on the side 13a side of the element body 10) and the end E22aa of the first escape wiring 22aa opposite to the first escape wiring 22ab (here, the end on the side 13a side of the element body 10) are located at the same height in the coil axis direction. Furthermore, as shown in Figures 5, 6, 7, 8, 9, 10, 11, and 12, when viewed from the longitudinal direction L, it is preferable that the other end (here, the end on the side 13b side of the element body 10) F21a of the first coil wiring 21a, which is located more inside the element body 10 in the coil axis direction than one end (here, the end on the side 13a side of the element body 10) E21a of the first coil wiring 21a, i.e., the other end (here, the end on the side 13b side of the element body 10) F21a of the first coil wiring 21a, which is further away from the surface (here, the side 13a) of the element body 10 than one end (here, the end on the side 13a side of the element body 10) E21a of the first coil wiring 21a, and the end (here, the end on the side 13b side of the element body 10) F22ab of the first outgoing wiring 22ab opposite the first outgoing wiring 22aa are located at the same height.

[0189] As described above, in an inductor component in which the first escape routing 22aa and the first escape routing 22ab are as far apart as possible in the coil axis direction, the areas where stress remains during firing in the manufacturing process are dispersed, thereby preventing localized increases in stress.

[0190] 4, in the inductor component 1B, the second coil wiring 21b may be electrically connected to the second external electrode 30b via two second escape wirings 22ba and 22bb arranged in the coil axis direction. Similarly, the second coil wiring 21b may be electrically connected to the second external electrode 30b via three or more second escape wirings arranged in the coil axis direction. In other words, the second coil wiring 21b may be electrically connected to the second external electrode 30b via multiple second escape wirings arranged in the coil axis direction.

[0191] The configuration of the plurality of second escape wirings is preferably the same as the configuration of the plurality of first escape wirings described above.

[0192] [Embodiment 3] In the inductor element according to the third embodiment of the present invention, the dimension of the first escape wiring in the coil axis direction increases from the first external electrode side toward the first coil wiring side. Except for this, the inductor element according to the third embodiment of the present invention is similar to the inductor element according to the first embodiment of the present invention.

[0193] FIG. 13 is a schematic perspective view showing an example of an inductor component according to a third embodiment of the present invention.

[0194] In the inductor component 1C shown in FIG. 13, the first coil wiring 21a is electrically connected to the first external electrode 30a via the first extraction wiring 22ae.

[0195] The first escape wiring 22ae has an escape wiring portion 23ae and an escape wiring portion 24ae.

[0196] The lead wiring portion 23ae is connected to the first external electrode 30a.

[0197] The lead wiring portion 24ae is provided between the lead wiring portion 23ae and the first coil wiring 21a and is connected to both of them.

[0198] Fig. 14 is a cross-sectional schematic diagram showing an example of a cross section taken along line c1-c2 of the inductor component shown in Fig. 13. More specifically, Fig. 14 shows a cross section including the boundary between the lead wiring portion 23ae and the lead wiring portion 24ae in the inductor component 1C.

[0199] Fig. 15 is a cross-sectional schematic diagram showing an example of a cross section taken along line segment d1-d2 of the inductor component shown in Fig. 13. More specifically, Fig. 15 shows a cross section including the boundary between the lead-out wiring portion 24ae and the first coil wiring 21a in the inductor component 1C.

[0200] As shown in FIGS. 13, 14, and 15, the dimension of the first escape wiring 22ae in the coil axis direction increases from the first external electrode 30a side toward the first coil wiring 21a side.

[0201] 14 and 15, the dimension of the first escape wiring 22ae in the coil axis direction increases in a stepwise manner from the dimension W23ae of the escape wiring portion 23ae in the coil axis direction to the dimension W24ae of the escape wiring portion 24ae in the coil axis direction, as the distance from the first external electrode 30a to the first coil wiring 21a increases. That is, in the example shown in Fig. 14 and 15, the dimension of the first escape wiring 22ae in the coil axis direction increases in two steps as the distance from the first external electrode 30a to the first coil wiring 21a increases.

[0202] The dimension of the first escape wiring 22ae in the coil axis direction may increase in three or more stages from the first external electrode 30a side toward the first coil wiring 21a side.

[0203] In the examples shown in Figures 13, 14, and 15, the outer shape of the first extraction wiring 22ae when viewed from the height direction T is stepped on the side 13b of the base body 10 so that the dimension in the coil axis direction increases stepwise from the first external electrode 30a side toward the first coil wiring 21a side.

[0204] In addition, the outer shape of the first extraction wiring 22ae when viewed from the height direction T may be stepped on the side surface 13a of the element body 10, or may be stepped on both the side surface 13a and the side surface 13b of the element body 10, so that the dimension in the coil axis direction increases stepwise from the first external electrode 30a side toward the first coil wiring 21a side.

[0205] The dimension of the first escape wiring 22ae in the coil axis direction may gradually increase from the first external electrode 30a side toward the first coil wiring 21a side.

[0206] For example, the outer shape of the first extraction wiring 22ae when viewed from the height direction T may be a straight line that is inclined on the side surface 13b of the element body 10, or a straight line that is inclined on the side surface 13a of the element body 10, or a straight line that is inclined on both the side surface 13a and the side surface 13b of the element body 10, or a curved line on the side surface 13a of the element body 10, or a curved line on both the side surface 13a and the side surface 13b of the element body 10, or a shape that combines two or more of these.

[0207] As described above, in an inductor component in which the dimension of the first escape wiring in the coil axis direction increases from the first external electrode side toward the first coil wiring side, current concentration in the first escape wiring is suppressed.

[0208] 13, in an inductor component 1C, the second coil wiring 21b may be electrically connected to the second external electrode 30b via the second escape wiring 22be. In this case, as shown in Fig. 13, the dimension of the second escape wiring 22be in the coil axis direction may increase from the second external electrode 30b side toward the second coil wiring 21b side.

[0209] Other aspects of the second escape routing 22be are preferably similar to those of the first escape routing 22ae described above.

[0210] [Embodiment 4] In the inductor component according to the fourth embodiment of the present invention, the number of first lead wires increases from the first external electrode side toward the first coil wire side. The number of lead wires is defined as the number in a cross section perpendicular to the direction in which the lead wires extend. Except for this, the inductor component according to the fourth embodiment of the present invention is similar to the inductor component according to the first embodiment of the present invention.

[0211] FIG. 16 is a schematic perspective view showing an example of an inductor component according to a fourth embodiment of the present invention.

[0212] In the inductor component 1D shown in FIG. 16, the first coil wiring 21a is electrically connected to the first external electrode 30a via the first escape wiring 22af.

[0213] The first escape wiring 22af has an escape wiring portion 23af, an escape wiring portion 24af, and an escape wiring portion 25af.

[0214] The lead wiring portion 23af is connected to the first external electrode 30a.

[0215] The lead wiring portion 24af is provided between the lead wiring portion 23af and the first coil wiring 21a and is connected to both of them.

[0216] The lead wiring portion 25af is electrically connected to the lead wiring portion 23af and the first coil wiring 21a so as to be parallel to the lead wiring portion 24af.

[0217] Fig. 17 is a cross-sectional schematic diagram showing an example of a cross section taken along line segment e1-e2 of the inductor component shown in Fig. 16. More specifically, Fig. 17 shows a cross section including the boundary between the lead wiring portion 23af and the lead wiring portion 24af in the inductor component 1D.

[0218] Fig. 18 is a cross-sectional schematic diagram showing an example of a cross section taken along line f1-f2 of the inductor component shown in Fig. 16. More specifically, Fig. 18 shows a cross section including the boundary between the lead-out wiring portion 24af (lead-out wiring portion 25af) and the first coil wiring 21a in the inductor component 1D.

[0219] As shown in FIGS. 16, 17, and 18, the number of first escape wirings 22af increases from the first external electrode 30a side toward the first coil wiring 21a side.

[0220] In the examples shown in Figures 16, 17, and 18, the number of first escape wirings 22af increases from one (escape wiring section 23af) to two (escape wiring section 24af and escape wiring section 25af) as one moves from the first external electrode 30a side to the first coil wiring 21a side.

[0221] The number of first escape wirings 22af may increase in a manner other than that described above from the first external electrode 30a side toward the first coil wiring 21a side. For example, the number of first escape wirings 22af may increase from one to three from the first external electrode 30a side toward the first coil wiring 21a side, or may increase from one to two and then from two to three. In the above example, the number of first escape wirings 22af closest to the first external electrode 30a is one, but it may be multiple.

[0222] As described above, in an inductor component in which the number of first escape wirings increases from the first external electrode side toward the first coil wiring side, current concentration in the first escape wirings is suppressed.

[0223] 16, in an inductor component 1D, the second coil wiring 21b may be electrically connected to the second external electrode 30b via the second escape wiring 22bf. In this case, as shown in Fig. 16, the number of the second escape wirings 22bf may increase from the second external electrode 30b side toward the second coil wiring 21b side.

[0224] Other aspects of the second escape routing 22bf are preferably similar to those of the first escape routing 22af described above.

[0225] [Embodiment 5] In the inductor component of the fifth embodiment of the present invention, when viewed from a longitudinal direction perpendicular to the coil axis direction, both ends of the first escape wiring and both ends of the first external electrode are offset from each other in the coil axis direction. Except for this, the inductor component of the fifth embodiment of the present invention is similar to the inductor component of the first embodiment of the present invention.

[0226] FIG. 19 is a schematic perspective view showing an example of an inductor component according to a fifth embodiment of the present invention.

[0227] Fig. 20 is a cross-sectional schematic diagram showing an example of a cross section taken along line g1-g2 of the inductor component shown in Fig. 19. More specifically, Fig. 20 shows a cross section including the boundary between the first escape routing and the first external electrode in the inductor component shown in Fig. 19.

[0228] In the inductor component 1E shown in Figure 19, when viewed from the longitudinal direction L perpendicular to the coil axis direction, as shown in Figure 20, both ends E22aa and F22aa of the first escape wiring 22aa and both ends E30a and F30a of the first external electrode 30a are offset from each other in the coil axis direction.

[0229] In the inductor component 1E, when viewed from the longitudinal direction L, both ends E22aa and F22aa of the first escape wiring 22aa and both ends E30a and F30a of the first external electrode 30a are offset from each other in the coil axis direction, so that, compared to the inductor component 1A, the locations near the first escape wiring 22aa where stress is likely to remain during firing in the manufacturing process are farther away from the side surface 13a of the element body 10 and the end E30a of the first external electrode 30a facing the side surface 13a of the element body 10. Therefore, in the inductor component 1E, even if an external load is applied to the side surface 13a of the element body 10 and the end E30a of the first external electrode 30a facing the side surface 13a of the element body 10, interfacial peeling between the first escape wiring 22aa and the element body 10 triggered by the external load is suppressed, and as a result, cracks are suppressed.

[0230] 19 and 20 show an example in which the first coil wiring 21a is electrically connected to the first external electrode 30a via one first extension wiring 22aa, but the first coil wiring 21a may be electrically connected to the first external electrode 30a via a plurality of first extension wirings. In this case, it is preferable that, when viewed from the length direction L, both ends of each first extension wiring and both ends of the first external electrode 30a are offset from each other in the coil axis direction.

[0231] FIG. 21 is a schematic perspective view showing an example of an inductor component according to a modified example of the fifth embodiment of the present invention.

[0232] Fig. 22 is a cross-sectional schematic diagram showing an example of a cross section taken along line segment h1-h2 of the inductor component shown in Fig. 21. More specifically, Fig. 22 shows a cross section including the boundary between the first escape routing and the first external electrode in the inductor component shown in Fig. 21.

[0233] Fig. 23 is a cross-sectional schematic diagram showing an example of a cross section taken along line j1-j2 of the inductor component shown in Fig. 21. More specifically, Fig. 23 shows a cross section including the boundary between the first escape wiring and the first coil wiring in the inductor component shown in Fig. 21.

[0234] In the inductor component 1E' shown in FIG. 21, when viewed from the longitudinal direction L, as shown in FIG. 22, both end portions E22aa and F22aa of the first escape wiring 22aa and both end portions E30a and F30a of the first external electrode 30a are offset from each other in the coil axis direction.

[0235] In the inductor component 1E' shown in Figure 21, when viewed from the longitudinal direction L, as shown in Figure 23, one end E21a of the first coil wiring 21a (here, the end on the side surface 13a side of the element body 10) and one end E22aa of the first escape wiring 22aa (here, the end on the side surface 13a side of the element body 10) are located at different heights in the coil axis direction. Furthermore, in the inductor component 1E′ shown in FIG. 21, when viewed from the longitudinal direction L as shown in FIG. 23, the other end F21a (here, the end on the side surface 13a of the element body 10) of the first coil wiring 21a is located more inside the element body 10 in the coil axis direction than one end E21a (here, the end on the side surface 13a of the element body 10) of the first coil wiring 21a. In other words, the other end F21a (here, the end on the side surface 13a of the element body 10) of the first coil wiring 21a is located farther from the surface (here, the side surface 13a) of the element body 10 than one end E21a (here, the end on the side surface 13a of the element body 10) of the first coil wiring 21a. The other end (here, the end on the side 13b side of the element body 10) F22aa of the first escape wiring 22aa, which is located more inside the element body 10 than one end (here, the end on the side 13a side of the element body 10) E22aa of the first escape wiring 22aa, i.e., the other end (here, the end on the side 13b side of the element body 10) F22aa of the first escape wiring 22aa, which is further away from the surface (here, the side 13a) of the element body 10 than one end (here, the end on the side 13a side of the element body 10) E22aa of the first escape wiring 22aa, is located at the same height.

[0236] As described above, in the inductor component 1E′, the first escape routing 22aa is located as far away as possible in the coil axis direction from the side surface 13a of the element body 10 and the end E30a of the first external electrode 30a facing the side surface 13a of the element body 10. As a result, compared to the inductor component 1E, areas near the first escape routing 22aa where stress is likely to remain during firing in the manufacturing process are located farther away from the side surface 13a of the element body 10 and the end E30a of the first external electrode 30a facing the side surface 13a of the element body 10. Therefore, in the inductor component 1E′, even if an external load is applied to the side surface 13a of the element body 10 and the end E30a of the first external electrode 30a facing the side surface 13a of the element body 10, interfacial peeling between the first escape routing 22aa and the element body 10 triggered by the external load is suppressed, and as a result, cracks are suppressed.

[0237] 21 , 22 , and 23 show examples in which the first coil wiring 21 a is electrically connected to the first external electrode 30 a via a single first escape wiring 22 aa, but an embodiment in which the first coil wiring 21 a is electrically connected to the first external electrode 30 a via a plurality of first escape wirings is also possible. In this case, it is preferable that, when viewed from the length direction L, both end portions of each first escape wiring and both end portions E30 a and F30 a of the first external electrode 30 a are offset from each other in the coil axis direction, and that, for at least one first escape wiring, one end E21 a of the first coil wiring 21 a and one end of the first escape wiring are located at different heights in the coil axis direction when viewed from the length direction L, and that the other end F21 a of the first coil wiring 21 a and the other end of the first escape wiring are located at the same height in the coil axis direction when viewed from the length direction L.

[0238] 19 and 21, both ends of the second escape wiring 22ba and both ends of the second external electrode 30b may be offset from each other in the coil axis direction when viewed from the length direction L. In this case, as shown in Fig. 21, one end of the second coil wiring 21b (here, the end on the side surface 13b of the element body 10) and one end of the second escape wiring 22ba (here, the end on the side surface 13b of the element body 10) may be located at different heights in the coil axis direction when viewed from the length direction L. Furthermore, when viewed from the length direction L, the other end (here, the end on the side surface 13a side of the element body 10) of the second coil wiring 21b is located more inside the element body 10 in the coil axis direction than one end (here, the end on the side surface 13b side of the element body 10) of the second coil wiring 21b, that is, the other end (here, the end on the side surface 13a side of the element body 10) of the second coil wiring 21b is located farther from the surface (here, the side surface 13b) of the element body 10 than one end (here, the end on the side surface 13b side of the element body 10) of the second coil wiring 21b. The other end (here, the end on the side 13a side of the element body 10) of the second escape wiring 22ba, which is located further inside the element body 10 than the one end (here, the end on the side 13b side of the element body 10) of the second escape wiring 22ba, i.e., the other end (here, the end on the side 13a side of the element body 10) of the second escape wiring 22ba, which is further away from the surface (here, the side 13b) of the element body 10 than the one end (here, the end on the side 13b side of the element body 10) of the second escape wiring 22ba, may be located at the same height.

[0239] In the above-mentioned embodiments 1, 2, 3, 4, and 5 (variant of embodiment 5), examples have been shown in which the mounting surface of the element body is parallel to the coil axis direction, but in these embodiments, the mounting surface of the element body may also be perpendicular to the coil axis direction.

[0240] [Embodiment 6] In the inductor component of the sixth embodiment of the present invention, the surface of the element body 10 includes a bottom surface perpendicular to the coil axis direction and a top surface opposite the bottom surface in the coil axis direction, and the bottom surface of the element body is the mounting surface. Furthermore, in the inductor component of the sixth embodiment of the present invention, the multiple coil wires further include a second coil wire electrically connected to the second external electrode via at least one second lead wire, the first lead wire is located closer to the top surface of the element body in the coil axis direction than the second lead wire, and the dimension of each first lead wire in the coil axis direction is smaller than the dimension of each second lead wire in the coil axis direction. The inductor component of the sixth embodiment of the present invention is otherwise similar to the inductor component of the first embodiment of the present invention.

[0241] FIG. 24 is a schematic perspective view showing an example of an inductor component according to a sixth embodiment of the present invention.

[0242] An inductor component 1F shown in FIG. 24 includes an element body 10, a coil 50, a first external electrode 30a, and a second external electrode 30b.

[0243] 24, in inductor component 1F, the surface of element body 10 includes end faces 11a and 11b facing in length direction L, top face 12a and bottom face 12b facing in height direction T, and side faces 13a and 13b facing in width direction W. In inductor component 1F, height direction T is parallel to the coil axis direction of coil 50. That is, in inductor component 1F, the surface of element body 10 includes bottom face 12b perpendicular to the coil axis direction and top face 12a facing bottom face 12b in the coil axis direction.

[0244] In this embodiment, the coil axis direction is parallel to the height direction T unless otherwise specified.

[0245] In inductor component 1F, bottom surface 12b of element body 10 is the mounting surface. More specifically, bottom surface 12b of element body 10 is the mounting surface that faces an object to be mounted (e.g., a substrate) when inductor component 1F is mounted. Therefore, in inductor component 1F, the mounting surface of element body 10, i.e., bottom surface 12b of element body 10, is perpendicular to the coil axis direction.

[0246] As shown in FIG. 24, the coil 50 is provided inside the element body 10 and is wound spirally along the coil axis direction.

[0247] The coil axis direction of the coil 50 is the direction in which the coil axis CB of the coil 50 extends, and is perpendicular to the bottom surface 12b, which is the mounting surface of the element body 10, as described above.

[0248] As shown in FIG. 24, the coil 50 is formed by electrically connecting a plurality of coil wires stacked in the coil axis direction.

[0249] In the example shown in FIG. 24, the plurality of coil wirings includes a first coil wiring 51a and a second coil wiring 51b.

[0250] The first coil wiring 51a is located at the outermost position of the plurality of coil wirings on the top surface 12a side of the element body 10 in the coil axis direction.

[0251] Of the multiple coil wires, the second coil wire 51b is located at the outermost position on the bottom surface 12b side of the element body 10 in the coil axis direction.

[0252] In the example shown in FIG. 24, the first coil wiring 51a and the second coil wiring 51b are electrically connected via a connection conductor 59a that passes through an insulating layer present between them in the coil axis direction.

[0253] 24, the first external electrode 30a is electrically connected to one end of the coil 50. More specifically, the first coil wiring 51a constituting the coil 50 is electrically connected to the first external electrode 30a via one first escape wiring 52aa.

[0254] 24, the first external electrode 30a extends from part of the bottom surface 12b to part of the end surface 11a of the element body 10. In other words, the first external electrode 30a is exposed not only on part of the bottom surface 12b of the element body 10 but also on part of the end surface 11a of the element body 10.

[0255] 24, the second external electrode 30b is electrically connected to the other end of the coil 50. More specifically, the second coil wiring 51b constituting the coil 50 is electrically connected to the second external electrode 30b via one second extraction wiring 52ba.

[0256] 24, the second external electrode 30b extends from part of the bottom surface 12b to part of the end surface 11b of the element body 10. In other words, the second external electrode 30b is exposed not only on part of the bottom surface 12b of the element body 10 but also on part of the end surface 11b of the element body 10.

[0257] As shown in FIG. 24, the first escape routing 52aa is located closer to the top surface 12a of the element body 10 than the second escape routing 52ba in the coil axis direction.

[0258] As shown in FIG. 24, the dimension of the first escape routing 52aa in the coil axis direction is smaller than the dimension of the second escape routing 52ba in the coil axis direction.

[0259] In the inductor component 1F, the dimension of the first escape routing 52aa in the coil axis direction is smaller than the dimension of the second escape routing 52ba in the coil axis direction, which suppresses residual stress near the first escape routing 52aa during firing in the manufacturing process. Therefore, in the inductor component 1F, even if an external load is applied to the element body 10 and the first external electrode 30a near the first escape routing 52aa, interfacial peeling between the first escape routing 52aa and the element body 10 triggered by the external load is suppressed, and as a result, cracks are suppressed.

[0260] 24 shows an example in which the first coil wiring 51a is electrically connected to the first external electrode 30a via one first extension wiring 52aa and the second coil wiring 51b is electrically connected to the second external electrode 30b via one second extension wiring 52ba. However, the first coil wiring 51a may be electrically connected to the first external electrode 30a via multiple first extension wirings and the second coil wiring 51b may be electrically connected to the second external electrode 30b via multiple second extension wirings. That is, the first coil wiring 51a may be electrically connected to the first external electrode 30a via at least one first extension wiring and the second coil wiring 51b may be electrically connected to the second external electrode 30b via at least one second extension wiring. In this case, it is sufficient that the dimension of each first extension wiring in the coil axis direction is smaller than the dimension of each second extension wiring in the coil axis direction. In other words, it is only necessary that the maximum value of the dimensions of all the first escape routings in the coil axis direction is smaller than the minimum value of the dimensions of all the second escape routings in the coil axis direction.

[0261] In a second aspect, an inductor component of the present invention comprises an element body, a coil disposed inside the element body and wound spirally along a coil axis direction, a first external electrode electrically connected to one end of the coil and exposed on the surface of the element body, and a second external electrode electrically connected to the other end of the coil and exposed on the surface of the element body, wherein the element body includes an insulator, the coil is formed by electrically connecting multiple coil wirings stacked in the coil axis direction, the multiple coil wirings including a first coil wiring electrically connected to the first external electrode via at least one first extraction wiring, and when viewed from a longitudinal direction perpendicular to the coil axis direction, both ends of the first extraction wiring and both ends of the first external electrode are offset from each other in the coil axis direction.

[0262] [Embodiment 7] An example of the second aspect of the inductor component of the present invention will be described below as an inductor component according to a seventh embodiment of the present invention.

[0263] FIG. 25 is a schematic perspective view showing an example of an inductor component according to a seventh embodiment of the present invention.

[0264] An inductor component 2A shown in FIG. 25 includes an element body 10, a coil 20, a first external electrode 30a, and a second external electrode 30b.

[0265] The element body 10, coil 20, first external electrode 30a, and second external electrode 30b that constitute the inductor component 2A are similar to the element body 10, coil 20, first external electrode 30a, and second external electrode 30b that constitute the inductor component 1A described above, respectively.

[0266] In this embodiment, the coil axis direction is parallel to the width direction W unless otherwise specified.

[0267] As shown in Fig. 25, the first external electrode 30a is electrically connected to one end of the coil 20. More specifically, as shown in Fig. 25, the first coil wiring 21a that constitutes the coil 20 is electrically connected to the first external electrode 30a via the first escape wiring 22aa'.

[0268] As shown in FIG. 25, the dimension of the first escape wiring 22aa' in the coil axis direction is preferably the same as the dimension of the first coil wiring 21a in the coil axis direction.

[0269] In the inductor component 2A, the dimension of the first escape wiring 22aa' in the coil axis direction is the same as the dimension of the first coil wiring 21a in the coil axis direction, so that an increase in DC resistance is suppressed compared to the inductor component 1A.

[0270] Fig. 26 is a cross-sectional schematic diagram showing an example of a cross section taken along line segment k1-k2 of the inductor component shown in Fig. 25. More specifically, Fig. 26 shows a cross section of the inductor component 2A that includes the boundary between the first escape routing 22aa' and the first external electrode 30a.

[0271] As shown in FIG. 26, when viewed from the longitudinal direction L perpendicular to the coil axis direction, both end portions E22aa' and F22aa' of the first escape wiring 22aa' and both end portions E30a and F30a of the first external electrode 30a are offset from each other in the coil axis direction.

[0272] In the inductor component 2A, when viewed from the longitudinal direction L, both ends E22aa' and F22aa' of the first escape wiring 22aa' and both ends E30a and F30a of the first external electrode 30a are offset from each other in the coil axis direction. As a result, compared to the inductor component 1A, the locations near the first escape wiring 22aa' where stress is likely to remain during firing in the manufacturing process are farther away from the side surface 13a of the element body 10 and the end E30a of the first external electrode 30a facing the side surface 13a of the element body 10. Therefore, in the inductor component 2A, even if an external load is applied to the side surface 13a of the element body 10 and the end E30a of the first external electrode 30a facing the side surface 13a of the element body 10, interfacial peeling between the first escape wiring 22aa' and the element body 10 triggered by the external load is suppressed, and as a result, cracks are suppressed.

[0273] 26, when viewed from the length direction L perpendicular to the coil axis direction, one end G22aa' of the first escape wiring 22aa' and one end G30a of the first external electrode 30a are located at the same position in the height direction T perpendicular to the coil axis direction and the length direction L. This reduces stray capacitance between the first escape wiring 22aa' and the first external electrode 30a.

[0274] As shown in Fig. 25, the second external electrode 30b is electrically connected to the other end of the coil 20. More specifically, as shown in Fig. 25, the second coil wiring 21b constituting the coil 20 may be electrically connected to the second external electrode 30b via the second escape wiring 22ba'.

[0275] As shown in FIG. 25, the dimension of the second escape wiring 22ba' in the coil axis direction is preferably the same as the dimension of the second coil wiring 21b in the coil axis direction.

[0276] As shown in FIG. 25, when viewed in the length direction L, both ends of the second escape wiring 22ba' and both ends of the second external electrode 30b are preferably offset from each other in the coil axis direction.

[0277] Although FIG. 25 shows an example in which the mounting surface of the element body is parallel to the coil axis direction, the mounting surface of the element body may be perpendicular to the coil axis direction.

[0278] Other aspects of the first escape wiring 22aa' and the second escape wiring 22ba' are preferably similar to those of the first escape wiring and the second escape wiring in the above-mentioned embodiment 1, embodiment 2, embodiment 3, embodiment 4, embodiment 5 (variant of embodiment 5), and embodiment 6, respectively.

[0279] In the inductor component 2A, when viewed from the longitudinal direction L, the two ends E22aa' and F22aa' of the first escape wiring 22aa' and the two ends E30a and F30a of the first external electrode 30a are offset from each other in the coil axis direction. This can be achieved, for example, by reducing the dimension of the insulating layer between the first coil wiring 21a and the second coil wiring 21b in the coil axis direction or by increasing the dimension of the first external electrode 30a in the coil axis direction in an inductor component in which the first coil wiring 21a and the first escape wiring 22aa' have the same dimensions in the coil axis direction. A similar configuration can be achieved in which the two ends of the second escape wiring 22ba' and the two ends of the second external electrode 30b are offset from each other in the coil axis direction when viewed from the longitudinal direction L.

[0280] In a third aspect, an inductor component of the present invention comprises: an element body; a coil provided inside the element body and wound spirally along a coil axis direction; a first external electrode electrically connected to one end of the coil and exposed on a surface of the element body; and a second external electrode electrically connected to the other end of the coil and exposed on the surface of the element body; the element body includes an insulator; the surface of the element body includes a bottom surface perpendicular to the coil axis direction and a top surface opposite to the bottom surface in the coil axis direction; the first external electrode and the second external electrode are exposed at least on the bottom surface of the element body so as to be separated from each other; and the coil is made up of a plurality of coils stacked in the coil axis direction. The coil wiring is electrically connected, and the multiple coil wirings include a first coil wiring electrically connected to the first external electrode via at least one first lead wiring and a second coil wiring electrically connected to the second external electrode via at least one second lead wiring, and the first lead wiring is located closer to the top surface of the element body than the second lead wiring in the coil axis direction, and when viewed from a length direction perpendicular to the coil axis direction, the minimum distance between the end of the first lead wiring and the end of the first external electrode in a width direction perpendicular to the coil axis direction and the length direction is greater than the minimum distance between the end of the second lead wiring and the end of the second external electrode.

[0281] [Embodiment 8] An example of the inductor component according to the third aspect of the present invention will be described below as an inductor component according to an eighth embodiment of the present invention.

[0282] FIG. 27 is a schematic perspective view showing an example of an inductor component according to an eighth embodiment of the present invention.

[0283] An inductor component 3A shown in FIG. 27 includes an element body 10, a coil 50, a first external electrode 30a, and a second external electrode 30b.

[0284] The element body 10, coil 50, first external electrode 30a, and second external electrode 30b that constitute the inductor component 3A are similar to the element body 10, coil 50, first external electrode 30a, and second external electrode 30b that constitute the inductor component 1F described above, respectively.

[0285] In this embodiment, the coil axis direction is parallel to the height direction T unless otherwise specified.

[0286] 27, the first external electrode 30a is electrically connected to one end of the coil 50. More specifically, as shown in Fig. 27, the first coil wiring 51a constituting the coil 50 is electrically connected to the first external electrode 30a via the first escape wiring 52aa'.

[0287] As shown in FIG. 27, the dimension of the first escape wiring 52aa' in the coil axis direction is preferably the same as the dimension of the first coil wiring 51a in the coil axis direction.

[0288] In the inductor component 3A, the dimension of the first escape wiring 52aa' in the coil axis direction is the same as the dimension of the first coil wiring 51a in the coil axis direction, so that an increase in DC resistance is suppressed compared to the inductor component 1F.

[0289] 27, the second external electrode 30b is electrically connected to the other end of the coil 50. More specifically, as shown in Fig. 27, the second coil wiring 51b that constitutes the coil 50 is electrically connected to the second external electrode 30b via the second escape wiring 52ba'.

[0290] As shown in FIG. 27, the dimension of the second escape wiring 52ba' in the coil axis direction is preferably the same as the dimension of the second coil wiring 51b in the coil axis direction.

[0291] As shown in FIG. 27, the first escape routing 52aa' is located closer to the top surface 12a of the element body 10 than the second escape routing 52ba' in the coil axis direction.

[0292] Fig. 28 is a cross-sectional schematic diagram showing an example of a cross section taken along line m1-m2 of the inductor component shown in Fig. 27. More specifically, Fig. 28 shows a cross section of the inductor component 3A that includes the boundary between the first escape routing 52aa' and the first external electrode 30a.

[0293] Fig. 29 is a cross-sectional schematic diagram showing an example of a cross section taken along line n1-n2 of the inductor component shown in Fig. 27. More specifically, Fig. 29 shows a cross section of the inductor component 3A that includes the boundary between the second escape routing 52ba' and the second external electrode 30b.

[0294] As shown in Figures 28 and 29, when viewed from the length direction L perpendicular to the coil axis direction, in the width direction W perpendicular to the coil axis direction and the length direction L, the minimum distance Ya between the end of the first escape wiring 52aa' and the end of the first external electrode 30a is greater than the minimum distance Yb ​​between the end of the second escape wiring 52ba' and the end of the second external electrode 30b.

[0295] In the inductor component 3A, when viewed from the length direction L, the minimum distance Ya between the end of the first escape wiring 52aa' and the end of the first external electrode 30a is greater in the width direction W than the minimum distance Yb ​​between the end of the second escape wiring 52ba' and the end of the second external electrode 30b. As a result, compared to the inductor component 1F, the locations near the first escape wiring 52aa' where stress is likely to remain during firing in the manufacturing process are farther away from the side surface 13a of the element body 10 and the end of the first external electrode 30a on the side surface 13a side of the element body 10. Therefore, in the inductor component 3A, even if an external load is applied to the side surface 13a of the element body 10 and the end of the first external electrode 30a on the side surface 13a side of the element body 10, interfacial peeling between the first escape wiring 52aa' and the element body 10 triggered by the external load is suppressed, and as a result, the occurrence of cracks is suppressed.

[0296] Other aspects of the first escape wiring 52aa' and the second escape wiring 52ba' are preferably similar to those of the first escape wiring and the second escape wiring in the above-mentioned embodiment 1, embodiment 2, embodiment 3, embodiment 4, embodiment 5 (variant of embodiment 5), and embodiment 6, respectively.

[0297] For the inductor component 3A, when viewed from the length direction L, the minimum distance Ya between the end of the first escape wiring 52aa' and the end of the first external electrode 30a in the width direction W is greater than the minimum distance Yb ​​between the end of the second escape wiring 52ba' and the end of the second external electrode 30b. This configuration can be achieved, for example, by bending the first escape wiring 52aa' closer to the side surface 13b of the element body 10 than the second escape wiring 52ba', or by widening the first external electrode 30a closer to the side surface 13a of the element body 10 than the second external electrode 30b, in a configuration in which the dimensions in the coil axis direction of the first coil wiring 51a and the first escape wiring 52aa of the inductor component 1F are the same.

[0298] The present specification discloses the following:

[0299] <1> The base body and a coil provided inside the element body and wound spirally along the coil axis direction; a first external electrode electrically connected to one end of the coil and exposed on the surface of the element body; a second external electrode electrically connected to the other end of the coil and exposed on the surface of the element body, The element body includes an insulator, The coil is formed by electrically connecting a plurality of coil wires stacked in the coil axis direction, the plurality of coil wirings include a first coil wiring electrically connected to the first external electrode via at least one first lead wiring; The inductor component is characterized in that the dimension of each of the first escape wirings in the coil axis direction is smaller than the dimension of the first coil wiring in the coil axis direction.

[0300] <2> The first coil wiring is electrically connected to the first external electrode via a plurality of the first lead wirings arranged in the coil axis direction. <1> The inductor component according to claim 1.

[0301] <3> The first escape wirings have the same dimensions in the coil axis direction. <2> The inductor component according to claim 1.

[0302] <4> the plurality of first escape wirings include a first outer escape wiring and a first inner escape wiring located more inward of the element body than the first outer escape wiring in the coil axis direction; the first outer lead wiring and the first inner lead wiring have different dimensions in the coil axis direction; <2> The inductor component according to claim 1.

[0303] <5> a dimension of the first outer lead wiring in the coil axis direction is smaller than a dimension of the first inner lead wiring in the coil axis direction; <4> The inductor component according to claim 1.

[0304] <6> There are three or more of the first escape wirings; The intervals between the plurality of first escape wirings in the coil axis direction are the same. <2> ~ <5> 10. The inductor component according to claim 9, wherein:

[0305] <7> the plurality of first escape wirings include a first outer escape wiring, a first inner escape wiring located more inward of the element body than the first outer escape wiring in the coil axis direction, and a first intermediate escape wiring located between the first outer escape wiring and the first inner escape wiring so as to be adjacent to both of them in the coil axis direction; a distance between the first outer lead wiring and the first intermediate lead wiring in the coil axis direction and a distance between the first inner lead wiring and the first intermediate lead wiring in the coil axis direction are different from each other; <2> ~ <5> 10. The inductor component according to claim 9, wherein:

[0306] <8> a distance between the first outer lead wiring and the first intermediate lead wiring in the coil axis direction is larger than a distance between the first inner lead wiring and the first intermediate lead wiring in the coil axis direction; <7> The inductor component according to claim 1.

[0307] <9> the plurality of first escape wirings include a first outer escape wiring and a first inner escape wiring located more inward of the element body than the first outer escape wiring in the coil axis direction; when viewed from a length direction orthogonal to the coil axis direction, one end of the first coil wiring and an end of the first outer lead wiring opposite to the first inner lead wiring are positioned at the same height in the coil axis direction, When viewed from the length direction, the other end of the first coil wiring, which is located more inward of the element body than the one end of the first coil wiring in the coil axis direction, and the end of the first inner lead wiring opposite to the first outer lead wiring are located at the same height. <2> ~ <8> 10. The inductor component according to claim 9, wherein:

[0308] <10> a dimension of the first lead wiring in the coil axis direction increases from the first external electrode side toward the first coil wiring side; <1> ~ <9> 10. The inductor component according to claim 9, wherein:

[0309] <11> the number of the first lead wirings increases from the first external electrode side toward the first coil wiring side; <1> ~ <9> 10. The inductor component according to claim 9, wherein:

[0310] <12> When viewed from a length direction orthogonal to the coil axis direction, both ends of the first escape wiring and both ends of the first external electrode are shifted from each other in the coil axis direction. <1> ~ <11> 10. The inductor component according to claim 9, wherein:

[0311] <13> When viewed from the length direction, one end of the first coil wiring and one end of the first escape wiring are located at different heights in the coil axis direction, When viewed from the length direction, in the coil axis direction, the other end of the first coil wiring, which is located more inward of the element body than the one end of the first coil wiring, and the other end of the first escape wiring, which is located more inward of the element body than the one end of the first escape wiring, are located at the same height. <12> The inductor component according to claim 1.

[0312] <14> The first coil wiring and the first lead wiring are connected at a corner portion corresponding to a location where the first lead wiring starts to extend at an angle from a linear portion of the first coil wiring when viewed from the coil axis direction. <1> ~ <13> 10. The inductor component according to claim 9, wherein:

[0313] <15> the surface of the element body includes a bottom surface parallel to the coil axis direction and a top surface facing the bottom surface in a height direction perpendicular to the coil axis direction, the first external electrode and the second external electrode are exposed at least on the bottom surface of the element body so as to be spaced apart from each other; <1> ~ <14> 10. The inductor component according to claim 9, wherein:

[0314] <16> the surface of the element body includes a bottom surface perpendicular to the coil axis direction and a top surface opposite to the bottom surface in the coil axis direction, the first external electrode and the second external electrode are exposed at least on the bottom surface of the element body so as to be spaced apart from each other; <1> ~ <14> 10. The inductor component according to claim 9, wherein:

[0315] <17> the plurality of coil wirings further include second coil wirings electrically connected to the second external electrode via at least one second lead wiring; the first escape wiring is located closer to the top surface of the element body than the second escape wiring in the coil axis direction; a dimension of each of the first escape wirings in the coil axis direction is smaller than a dimension of each of the second escape wirings in the coil axis direction; <16> The inductor component according to claim 1.

[0316] <18> The base body and a coil provided inside the element body and wound spirally along the coil axis direction; a first external electrode electrically connected to one end of the coil and exposed on the surface of the element body; a second external electrode electrically connected to the other end of the coil and exposed on the surface of the element body, The element body includes an insulator, The coil is formed by electrically connecting a plurality of coil wires stacked in the coil axis direction, the plurality of coil wirings include a first coil wiring electrically connected to the first external electrode via at least one first lead wiring; An inductor component characterized in that, when viewed from a length direction perpendicular to the coil axis direction, both ends of the first escape wiring and both ends of the first external electrode are offset from each other in the coil axis direction.

[0317] <19> The base body and a coil provided inside the element body and wound spirally along the coil axis direction; a first external electrode electrically connected to one end of the coil and exposed on the surface of the element body; a second external electrode electrically connected to the other end of the coil and exposed on the surface of the element body, The element body includes an insulator, the surface of the element body includes a bottom surface perpendicular to the coil axis direction and a top surface opposite to the bottom surface in the coil axis direction, the first external electrode and the second external electrode are exposed at least on the bottom surface of the element body and spaced apart from each other; The coil is formed by electrically connecting a plurality of coil wires stacked in the coil axis direction, the plurality of coil wirings include a first coil wiring electrically connected to the first external electrode via at least one first lead wiring, and a second coil wiring electrically connected to the second external electrode via at least one second lead wiring; the first escape wiring is located closer to the top surface of the element body than the second escape wiring in the coil axis direction; an inductor component characterized in that, when viewed from a length direction perpendicular to the coil axis direction, the minimum distance between the end of the first escape wiring and the end of the first external electrode in a width direction perpendicular to the coil axis direction and the length direction is greater than the minimum distance between the end of the second escape wiring and the end of the second external electrode.

[0318] <20> the first coil wiring is electrically connected to the first external electrode via one of the first lead wirings; <1> The inductor component according to claim 1.

[0319] <21> a dimension of the first inner lead wiring in the coil axis direction is smaller than a dimension of the first outer lead wiring in the coil axis direction; <4> The inductor component according to claim 1.

[0320] <22> a distance between the first inner lead wiring and the first intermediate lead wiring in the coil axis direction is larger than a distance between the first outer lead wiring and the first intermediate lead wiring in the coil axis direction; <7> The inductor component according to claim 1.

[0321] <23> a dimension of each of the first escape wirings in the coil axis direction is smaller than a dimension of the first coil wiring in the coil axis direction; <18> The inductor component according to claim 1.

[0322] <24> the first coil wiring is electrically connected to the first external electrode via one of the first lead wirings; <18> or <23> The inductor component according to claim 1.

[0323] <25> The first coil wiring is electrically connected to the first external electrode via a plurality of the first lead wirings arranged in the coil axis direction. <18> or <23> The inductor component according to claim 1.

[0324] <26> The first escape wirings have the same dimensions in the coil axis direction. <25> The inductor component according to claim 1.

[0325] <27> the plurality of first escape wirings include a first outer escape wiring and a first inner escape wiring located more inward of the element body than the first outer escape wiring in the coil axis direction; the first outer lead wiring and the first inner lead wiring have different dimensions in the coil axis direction; <25> The inductor component according to claim 1.

[0326] <28> a dimension of the first outer lead wiring in the coil axis direction is smaller than a dimension of the first inner lead wiring in the coil axis direction; <27> The inductor component according to claim 1.

[0327] <29> a dimension of the first inner lead wiring in the coil axis direction is smaller than a dimension of the first outer lead wiring in the coil axis direction; <27> The inductor component according to claim 1.

[0328] <30> There are three or more of the first escape wirings; The intervals between the plurality of first escape wirings in the coil axis direction are the same. <25> ~ <29> 10. The inductor component according to claim 9, wherein:

[0329] <31> the plurality of first escape wirings include a first outer escape wiring, a first inner escape wiring located more inward of the element body than the first outer escape wiring in the coil axis direction, and a first intermediate escape wiring located between the first outer escape wiring and the first inner escape wiring so as to be adjacent to both of them in the coil axis direction; a distance between the first outer lead wiring and the first intermediate lead wiring in the coil axis direction and a distance between the first inner lead wiring and the first intermediate lead wiring in the coil axis direction are different from each other; <25> ~ <29> 10. The inductor component according to claim 9, wherein:

[0330] <32> a distance between the first outer lead wiring and the first intermediate lead wiring in the coil axis direction is larger than a distance between the first inner lead wiring and the first intermediate lead wiring in the coil axis direction; <31> The inductor component according to claim 1.

[0331] <33> a distance between the first inner lead wiring and the first intermediate lead wiring in the coil axis direction is larger than a distance between the first outer lead wiring and the first intermediate lead wiring in the coil axis direction; <31> The inductor component according to claim 1.

[0332] <34> the plurality of first escape wirings include a first outer escape wiring and a first inner escape wiring located more inward of the element body than the first outer escape wiring in the coil axis direction; when viewed from a length direction orthogonal to the coil axis direction, one end of the first coil wiring and an end of the first outer lead wiring opposite to the first inner lead wiring are positioned at the same height in the coil axis direction, When viewed from the length direction, the other end of the first coil wiring, which is located more inward of the element body than the one end of the first coil wiring in the coil axis direction, and the end of the first inner lead wiring opposite to the first outer lead wiring are located at the same height. <25> ~ <33> 10. The inductor component according to claim 9, wherein:

[0333] <35> a dimension of the first lead wiring in the coil axis direction increases from the first external electrode side toward the first coil wiring side; <18> , <23> ~ <34> 10. The inductor component according to claim 9, wherein:

[0334] <36> the number of the first lead wirings increases from the first external electrode side toward the first coil wiring side; <18> , <23> , <25> ~ <34> 10. The inductor component according to claim 9, wherein:

[0335] <37> When viewed from the length direction, one end of the first coil wiring and one end of the first escape wiring are located at different heights in the coil axis direction, When viewed from the length direction, in the coil axis direction, the other end of the first coil wiring, which is located more inward of the element body than the one end of the first coil wiring, and the other end of the first escape wiring, which is located more inward of the element body than the one end of the first escape wiring, are located at the same height. <18> , <23> ~ <36> 10. The inductor component according to claim 9, wherein:

[0336] <38> The first coil wiring and the first lead wiring are connected at a corner portion corresponding to a location where the first lead wiring starts to extend at an angle from a linear portion of the first coil wiring when viewed from the coil axis direction. <18> , <23> ~ <37> 10. The inductor component according to claim 9, wherein:

[0337] <39> the surface of the element body includes a bottom surface parallel to the coil axis direction and a top surface facing the bottom surface in a height direction perpendicular to the coil axis direction, the first external electrode and the second external electrode are exposed at least on the bottom surface of the element body so as to be spaced apart from each other; <18> , <23> ~ <38> 10. The inductor component according to claim 9, wherein:

[0338] <40> the surface of the element body includes a bottom surface perpendicular to the coil axis direction and a top surface opposite to the bottom surface in the coil axis direction, the first external electrode and the second external electrode are exposed at least on the bottom surface of the element body so as to be spaced apart from each other; <18> , <23> ~ <38> 10. The inductor component according to claim 9, wherein:

[0339] <41> the plurality of coil wirings further include second coil wirings electrically connected to the second external electrode via at least one second lead wiring; the first escape wiring is located closer to the top surface of the element body than the second escape wiring in the coil axis direction; a dimension of each of the first escape wirings in the coil axis direction is smaller than a dimension of each of the second escape wirings in the coil axis direction; <40> The inductor component according to claim 1.

[0340] <42> a dimension of each of the first escape wirings in the coil axis direction is smaller than a dimension of the first coil wiring in the coil axis direction; <19> The inductor component according to claim 1.

[0341] <43> the first coil wiring is electrically connected to the first external electrode via one of the first lead wirings; <19> or <42> The inductor component according to claim 1.

[0342] <44> The first coil wiring is electrically connected to the first external electrode via a plurality of the first lead wirings arranged in the coil axis direction. <19> or <42> The inductor component according to claim 1.

[0343] <45> The first escape wirings have the same dimensions in the coil axis direction. <44> The inductor component according to claim 1.

[0344] <46> the plurality of first escape wirings include a first outer escape wiring and a first inner escape wiring located more inward of the element body than the first outer escape wiring in the coil axis direction; the first outer lead wiring and the first inner lead wiring have different dimensions in the coil axis direction; <44> The inductor component according to claim 1.

[0345] <47> a dimension of the first outer lead wiring in the coil axis direction is smaller than a dimension of the first inner lead wiring in the coil axis direction; <46> The inductor component according to claim 1.

[0346] <48> a dimension of the first inner lead wiring in the coil axis direction is smaller than a dimension of the first outer lead wiring in the coil axis direction; <46> The inductor component according to claim 1.

[0347] <49> There are three or more of the first escape wirings; The intervals between the plurality of first escape wirings in the coil axis direction are the same. <44> ~ <48> 10. The inductor component according to claim 9, wherein:

[0348] <50> the plurality of first escape wirings include a first outer escape wiring, a first inner escape wiring located more inward of the element body than the first outer escape wiring in the coil axis direction, and a first intermediate escape wiring located between the first outer escape wiring and the first inner escape wiring so as to be adjacent to both of them in the coil axis direction; a distance between the first outer lead wiring and the first intermediate lead wiring in the coil axis direction and a distance between the first inner lead wiring and the first intermediate lead wiring in the coil axis direction are different from each other; <44> ~ <48> 10. The inductor component according to claim 9, wherein:

[0349] <51> a distance between the first outer lead wiring and the first intermediate lead wiring in the coil axis direction is larger than a distance between the first inner lead wiring and the first intermediate lead wiring in the coil axis direction; <50> The inductor component according to claim 1.

[0350] <52> a distance between the first inner lead wiring and the first intermediate lead wiring in the coil axis direction is larger than a distance between the first outer lead wiring and the first intermediate lead wiring in the coil axis direction; <50> The inductor component according to claim 1.

[0351] <53> the plurality of first escape wirings include a first outer escape wiring and a first inner escape wiring located more inward of the element body than the first outer escape wiring in the coil axis direction; when viewed from a length direction orthogonal to the coil axis direction, one end of the first coil wiring and an end of the first outer lead wiring opposite to the first inner lead wiring are positioned at the same height in the coil axis direction, When viewed from the length direction, the other end of the first coil wiring, which is located more inward of the element body than the one end of the first coil wiring in the coil axis direction, and the end of the first inner lead wiring opposite to the first outer lead wiring are located at the same height. <44> ~ <52> 10. The inductor component according to claim 9, wherein:

[0352] <54> a dimension of the first lead wiring in the coil axis direction increases from the first external electrode side toward the first coil wiring side; <19> , <42> ~ <53> 10. The inductor component according to claim 9, wherein:

[0353] <55> the number of the first lead wirings increases from the first external electrode side toward the first coil wiring side; <19> , <42> , <44> ~ <53> 10. The inductor component according to claim 9, wherein:

[0354] <56> When viewed from a length direction orthogonal to the coil axis direction, both ends of the first escape wiring and both ends of the first external electrode are shifted from each other in the coil axis direction. <19> , <42> ~ <55> 10. The inductor component according to claim 9, wherein:

[0355] <57> When viewed from the length direction, one end of the first coil wiring and one end of the first escape wiring are located at different heights in the coil axis direction, When viewed from the length direction, in the coil axis direction, the other end of the first coil wiring, which is located more inward of the element body than the one end of the first coil wiring, and the other end of the first escape wiring, which is located more inward of the element body than the one end of the first escape wiring, are located at the same height. <56> The inductor component according to claim 1.

[0356] <58> The first coil wiring and the first lead wiring are connected at a corner portion corresponding to a location where the first lead wiring starts to extend at an angle from a linear portion of the first coil wiring when viewed from the coil axis direction. <19> , <42> ~ <57> 10. The inductor component according to claim 9, wherein:

[0357] <59> a dimension of each of the first escape wirings in the coil axis direction is smaller than a dimension of each of the second escape wirings in the coil axis direction; <19> , <42> ~ <58> 10. The inductor component according to claim 9, wherein: [Explanation of symbols]

[0358] 1A, 1B, 1C, 1D, 1E, 1E', 1F, 2A, 3A inductor components 10 Base 11a, 11b End surfaces of element body 12a Top surface of the body 12b Bottom of the body 13a, 13b Side of the body 15a, 15b, 15c, 15d, 15e, 15f, 15g Insulation layer 20, 50 coils 21a, 51a First coil wiring 21b, 51b Second coil wiring 22aa, 22aa', 22ab, 22ac, 22ad, 22ae, 22af, 52aa, 52aa' 1st extraction wiring 22ba, 22ba', 22bb, 22be, 22bf, 52ba, 52ba' Second lead-out wiring 23ae, 24ae, 23af, 24af, 25af Output wiring section 29a, 59a connecting conductor 30a 1st external electrode 30b 2nd external electrode 121aa, 121ab First coil conductor layer 121ba, 121bb Second coil conductor layer 122aa First lead conductor layer 122ba Second lead-out conductor layer 129aa Connecting conductor layer 130aa, 130ab, 130ac, 130ad, 130ae First outer conductor layer 130ba, 130bb, 130bc, 130bd, 130be Second outer conductor layer CA, CB coil shaft D corner part E21a One end of the first coil wiring E22aa, E22aa', F22aa, F22aa', F22ab, G22aa' Ends of the first exit wiring E30a, F30a, G30a Ends of the first external electrodes F21a: The other end of the first coil wiring L lengthwise T Height direction W width direction W21a: Dimension of the first coil wiring in the coil axis direction W22aa, W22ab, W22ac, W22ad Dimensions of the first lead wiring in the coil axis direction W23ae, W24ae Dimensions of the lead-out wiring section in the coil axis direction Xa, Xb, Xc, Xd: Distances between the first escape wirings in the coil axis direction Ya: The minimum distance between the end of the first interconnect wiring and the end of the first external electrode Yb: The minimum distance between the end of the second interconnection and the end of the second external electrode

Claims

1. The base body and a coil provided inside the element body and wound spirally along a coil axis direction; a first external electrode electrically connected to one end of the coil and exposed on a surface of the element body; a second external electrode electrically connected to the other end of the coil and exposed on the surface of the element body, the element body includes an insulator, The coil is formed by electrically connecting a plurality of coil wires stacked in the coil axis direction, the plurality of coil wirings include first coil wirings electrically connected to the first external electrode via a plurality of first lead wirings arranged in the coil axis direction, The inductor component is characterized in that the dimension of each of the first lead wirings in the coil axis direction is smaller than the dimension of the first coil wiring in the coil axis direction.

2. The inductor component according to claim 1 , wherein the first escape routings have the same dimensions in the coil axis direction.

3. the plurality of first escape wirings include first outer escape wirings and first inner escape wirings that are located more inward of the element body than the first outer escape wirings in the coil axis direction, The inductor component according to claim 1 , wherein the first outer lead wiring and the first inner lead wiring have mutually different dimensions in the coil axis direction.

4. The inductor component according to claim 3 , wherein a dimension of the first outer lead wiring in the coil axis direction is smaller than a dimension of the first inner lead wiring in the coil axis direction.

5. the plurality of first escape wirings are three or more; The inductor component according to claim 1 , wherein the first escape routings are spaced apart from one another at equal intervals in the coil axis direction.

6. the plurality of first escape wirings include a first outer escape wiring, a first inner escape wiring located more inward of the element body than the first outer escape wiring in the coil axis direction, and a first intermediate escape wiring located between the first outer escape wiring and the first inner escape wiring so as to be adjacent to both of them in the coil axis direction; 2. The inductor component according to claim 1, wherein a distance between the first outer lead wiring and the first intermediate lead wiring in the coil axis direction and a distance between the first inner lead wiring and the first intermediate lead wiring in the coil axis direction are different from each other.

7. 7. The inductor component according to claim 6, wherein a distance between the first outer lead wiring and the first intermediate lead wiring in the coil axis direction is larger than a distance between the first inner lead wiring and the first intermediate lead wiring in the coil axis direction.

8. the plurality of first escape wirings include first outer escape wirings and first inner escape wirings that are located more inward of the element body than the first outer escape wirings in the coil axis direction, when viewed from a length direction orthogonal to the coil axis direction, one end of the first coil wiring and an end of the first outer lead wiring opposite to the first inner lead wiring are positioned at the same height in the coil axis direction, 2. The inductor component of claim 1, wherein, when viewed from the longitudinal direction, the other end of the first coil wiring, which is located more inside the element body than the one end of the first coil wiring in the coil axis direction, and the end of the first inner outgoing wiring opposite the first outer outgoing wiring, are located at the same height.

9. An element body; a coil provided inside the element body and wound spirally along a coil axis direction; a first external electrode electrically connected to one end of the coil and exposed on a surface of the element body; a second external electrode electrically connected to the other end of the coil and exposed on the surface of the element body, the element body includes an insulator, The coil is formed by electrically connecting a plurality of coil wires stacked in the coil axis direction, the plurality of coil wirings include a first coil wiring electrically connected to the first external electrode via at least one first lead wiring; a dimension of the first lead wiring in the coil axis direction increases from the first external electrode side toward the first coil wiring side, The inductor component is characterized in that the dimension of each of the first lead wirings in the coil axis direction is smaller than the dimension of the first coil wiring in the coil axis direction.

10. An element body; a coil provided inside the element body and wound spirally along a coil axis direction; a first external electrode electrically connected to one end of the coil and exposed on a surface of the element body; a second external electrode electrically connected to the other end of the coil and exposed on the surface of the element body, the element body includes an insulator, The coil is formed by electrically connecting a plurality of coil wires stacked in the coil axis direction, the plurality of coil wirings include a first coil wiring electrically connected to the first external electrode via at least one first lead wiring; the number of the first lead wirings increases from the first external electrode side toward the first coil wiring side, The inductor component is characterized in that the dimension of each of the first lead wirings in the coil axis direction is smaller than the dimension of the first coil wiring in the coil axis direction.

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