Inductor

Abstract

This inductor is provided with a component main body having a laminated structure in which a plurality of non-conductive material layers are laminated, and a coil disposed inside the component main body, and is configured from a plurality of wire conductors and a plurality of conductive conductors, the plurality of wire conductors respectively extending along the interfaces between the non-conductive material layers. The plurality of conductive conductors penetrate the non-conductive material layer in the thickness direction, the wire conductor has a pad portion and a wire wiring portion, the wire conductor and the conductive conductors are alternately connected to form a shape extending along a spiral track, the conductive conductors include long-side conductive conductors extending along the wire conductor, and the long-side conductive conductors extend along the long-side conductive conductors. The pad portion includes a long-side pad portion connected to the long-side conductive conductor, and the dimension in the width direction of the long-side pad portion is larger than the dimension in the width direction of the wire wiring portion. The center position in the width direction of the long-side pad portion is shifted from the center position in the width direction of the wire wiring portion toward at least one of the inner peripheral side and the outer peripheral side of the spiral track.

Description

Technical Field

[0001] The present invention relates to inductors. Background Art

[0002] In order to improve the Q value (Q characteristic) which is a characteristic index of an inductor, it is required not to block the magnetic flux generated inside a coil extending along a spiral track formed by alternately connecting a wire conductor and a via conductor (including a long-side via conductor). For example, Patent Document 1 discloses a structure in which the long-side via conductor is offset not only to the inner circumference side of the spiral track but also to the outer circumference side in order to reduce the extent of the protrusion of the long-side via conductor (see Fig.13 ).

[0003] Patent Document 1: Japanese Patent Application Publication No. 2023-47357

[0004] However, even in the case of such a shifting of the long side conducting conductor, a sufficient improvement in the Q value cannot be obtained. In particular, with the recent demand for lower height and miniaturization of inductors, this trend has become significant. This is because the length of the long side conducting conductor in the long side direction is long, and the conducting conductor is a conductor connected in the stacking direction, so it is difficult to suppress the thickness in the stacking direction. In addition, from the perspective of suppressing short circuits between line conductors, it is preferred that the thickness in the stacking direction is thicker. Therefore, when the long side conducting conductor is shifted to the inner circumference of the spiral track, there is a possibility that the effect of blocking the magnetic flux passing through the coil is large, and the degradation of the Q characteristic cannot be suppressed. Summary of the invention

[0005] The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an inductor capable of improving Q characteristics.

[0006] In a first aspect, the inductor of the present invention comprises: a component body having a laminated structure in which a plurality of non-conductive material layers are laminated; and a coil, which is arranged inside the component body and is composed of a plurality of wire conductors and a plurality of via conductors, wherein the plurality of wire conductors extend along interfaces between the non-conductive material layers, respectively, and the plurality of via conductors penetrate the non-conductive material layers in a thickness direction, and the wire conductor has a pad portion connected to the via conductor and a wire wiring portion connected to the pad portion, and the wire conductor and the via conductor are alternately connected to form a coil. The conductive conductor extends along a spiral track, wherein the conductive conductor includes a long side conductive conductor, the long side conductive conductor extends along the wire conductor and has a long side shape, the pad portion includes a long side pad portion, the long side pad portion is connected to the long side conductive conductor, the width dimension of the long side pad portion is greater than the width dimension of the wire wiring portion, and when viewed from the axial direction of the coil, the center position of the long side pad portion in the width direction is offset from the center position of the wire wiring portion in the width direction to at least one of the inner circumference and the outer circumference of the spiral track.

[0007] In a second aspect, the inductor of the present invention comprises: a component body having a laminated structure formed by laminating a plurality of non-conductive material layers; and a coil, which is arranged inside the component body and is composed of a plurality of wire conductors and a plurality of via conductors, wherein the plurality of wire conductors extend respectively along interfaces between the non-conductive material layers, the plurality of via conductors penetrate the non-conductive material layers in the thickness direction, the wire conductors have a pad portion connected to the via conductors and a wire wiring portion connected to the pad portion, the wire conductors and the via conductors are alternately connected to form a shape extending along a spiral track, the via conductors include long-side via conductors, and the long-side via conductors extend along the wire conductors. The body extends and has a long-side shape, the above-mentioned pad portion includes a long-side pad portion, the above-mentioned long-side pad portion is connected to the above-mentioned long-side conductive conductor, the above-mentioned long-side pad portion includes an uneven pad portion with uneven width direction dimensions, the maximum value of the width direction dimension of the above-mentioned uneven pad portion is larger than the width direction dimension of the above-mentioned wire wiring portion, the minimum value of the width direction dimension of the above-mentioned uneven pad portion is the same as or larger than the width direction dimension of the above-mentioned wire wiring portion, and the center position in the width direction of the portion whose width direction dimension in the above-mentioned uneven pad portion is larger than the width direction dimension of the above-mentioned wire wiring portion is offset from the center position in the width direction of the above-mentioned wire wiring portion toward the outer peripheral side of the above-mentioned spiral track.

[0008] In a third aspect, the inductor of the present invention comprises: a component body having a laminated structure formed by laminating a plurality of non-conductive material layers; a coil arranged inside the component body and composed of a plurality of wire conductors and a plurality of via conductors, wherein the plurality of wire conductors extend respectively along interfaces between the non-conductive material layers, the plurality of via conductors penetrate the non-conductive material layers in the thickness direction, the wire conductors have a pad portion connected to the via conductors and a wire wiring portion connected to the pad portion, and the wire conductors and the via conductors are alternately connected to form a shape extending along a spiral track; and an external terminal electrode, which is arranged to be exposed from the outer surface of the component body and connected to either end of the coil, the via conductors including a long-side via conductor, the long-side via conductor extending along the wire conductor and having a long-side shape, the pad portion including a long-side pad portion, the long-side pad portion being connected to the long-side via conductor, the component body being in the shape of a rectangular parallelepiped and having a mounting surface, a top surface, a first side surface and a second side surface, and a first end surface and a second end surface, wherein The top surface is opposite to the mounting surface, the first side surface and the second side surface connect the mounting surface and the top surface and are opposite to each other, the first end surface and the second end surface respectively connect the mounting surface and the top surface and the first side surface and the second side surface and are opposite to each other, the axis of the coil is oriented in a direction perpendicular to the mounting surface, the width dimension of the long side pad portion is greater than the width dimension of the wire wiring portion, if the shortest distance between the surface of the component body and the outer periphery of the wire wiring portion is set to D, then the center position of the width direction of the portion of the long side pad portion whose interval with the inner end surface of the external terminal electrode or the surface of the component body is the same as or less than D is offset from the center position of the width direction of the wire wiring portion to the inner periphery of the spiral track, and the center position of the width direction of the portion of the long side pad portion whose interval with the inner end surface of the external terminal electrode or the surface of the component body is greater than D is offset from the center position of the width direction of the wire wiring portion to the outer periphery of the spiral track.

[0009] In a fourth aspect, the inductor of the present invention comprises: a component body having a stacked structure in which a plurality of non-conductive material layers are stacked; and a coil, which is arranged inside the component body and is composed of a plurality of wire conductors and a plurality of conducting conductors, wherein the plurality of wire conductors extend respectively along interfaces between the non-conductive material layers, and the plurality of conducting conductors penetrate the non-conductive material layers in the thickness direction, and the wire conductor has a pad portion connected to the conducting conductor and a wire wiring portion connected to the pad portion, and the wire conductor and the conducting conductor are alternately connected to form a shape extending along a spiral track, and the conducting conductor includes a long-side conducting conductor, the long-side conducting conductor extends along the wire conductor and has a long-side shape, and the pad portion includes a long-side pad portion, and the long-side pad portion is connected to the long-side conducting conductor. The width direction dimension of the above-mentioned long side pad portion is larger than the width direction dimension of the above-mentioned line wiring portion, the above-mentioned line wiring portion includes a line-symmetrical line wiring portion, the above-mentioned line-symmetrical line wiring portion has a line-symmetrical shape, the long side pad portion connected to the above-mentioned line-symmetrical line wiring portion includes a third part and a fourth part, the above-mentioned third part and the above-mentioned fourth part are arranged in sequence in the extension direction of the line conductor, when the part formed by folding the above-mentioned line-symmetrical line wiring portion along its symmetry axis toward the third part and the above-mentioned fourth part is used as an imaginary line wiring portion, the inner periphery of the above-mentioned third part is located on the inner periphery of the above-mentioned imaginary line wiring portion, the outer periphery of the above-mentioned third part extends from the outer periphery of the above-mentioned imaginary line wiring portion, the inner periphery of the above-mentioned fourth part extends from the inner periphery of the above-mentioned imaginary line wiring portion, and the outer periphery of the above-mentioned fourth part is located on the outer periphery of the above-mentioned imaginary line wiring portion.

[0010] According to the present invention, an inductor capable of improving Q characteristics can be provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a perspective view showing the appearance of the inductor 11 according to the first embodiment of the present invention.

[0012] Figure 2 The perspective view is in the axial direction of the coil 20. Figure 1 The inductor 11 is shown in the figure.

[0013] Figure 3 Yes means Figure 2 The diagram of a portion of the inductor 11 shown is a plan view showing a non-conductive material layer 19 - 1 provided with a wire conductor 23 - 1 providing a first end portion 21 of the coil 20 .

[0014] Figure 4 Yes means Figure 2 The diagram showing a portion of the inductor 11 is a cross-sectional view showing a non-conductive material layer 19 - 2 provided with a via conductor 24 - 1 connected to a line conductor 23 - 1 .

[0015] Figure 5 Yes means Figure 2 The diagram showing a portion of the inductor 11 is a plan view showing a non-conductive material layer 19 - 2 provided with a line conductor 23 - 2 connected to a via conductor 24 - 1 .

[0016] Figure 6 Yes means Figure 2 The diagram showing a portion of the inductor 11 is a cross-sectional view showing a non-conductive material layer 19 - 3 provided with a via conductor 24 - 2 connected to a line conductor 23 - 2 .

[0017] Figure 7 Yes means Figure 2 The diagram showing a portion of the inductor 11 is a plan view showing a non-conductive material layer 19 - 3 provided with a line conductor 23 - 3 connected to a via conductor 24 - 2 .

[0018] Figure 8 Yes means Figure 2 The diagram showing a portion of the inductor 11 is a cross-sectional view showing a non-conductive material layer 19 - 4 provided with a via conductor 24 - 3 connected to a line conductor 23 - 3 .

[0019] Figure 9-1 shows Figure 2 The diagram showing a portion of the inductor 11 is a plan view showing a non-conductive material layer 19 - 4 provided with a line conductor 23 - 4 connected to a via conductor 24 - 3 .

[0020] FIG9-2 is a plan view showing a part of FIG9-1 in an enlarged manner.

[0021] Fig.10 Yes means Figure 2 The diagram showing a portion of the inductor 11 is a cross-sectional view showing a non-conductive material layer 19 - 5 provided with a via conductor 24 - 4 connected to a line conductor 23 - 4 .

[0022] Fig.11 Yes means Figure 2 The diagram showing a portion of the inductor 11 is a plan view showing a non-conductive material layer 19 - 5 provided with a line conductor 23 - 5 connected to a via conductor 24 - 4 .

[0023] Fig.12 Yes means Figure 2 The diagram showing a portion of the inductor 11 is a cross-sectional view showing a non-conductive material layer 19 - 6 provided with a via conductor 24 - 5 connected to a line conductor 23 - 5 .

[0024] Fig.13 Yes means Figure 2The diagram showing a portion of the inductor 11 is a plan view showing a non-conductive material layer 19 - 6 provided with a line conductor 23 - 6 connected to a via conductor 24 - 5 .

[0025] Fig.14 Yes means Figure 2 The diagram showing a portion of the inductor 11 is a cross-sectional view showing a non-conductive material layer 19 - 7 provided with a via conductor 24 - 6 connected to a line conductor 23 - 6 .

[0026] Fig.15 Yes means Figure 2 The diagram showing a portion of the inductor 11 is a plan view showing a non-conductive material layer 19 - 7 provided with a line conductor 23 - 7 connected to a via conductor 24 - 6 .

[0027] Fig.16 Yes means Figure 2 The diagram showing a portion of the inductor 11 is a cross-sectional view showing a non-conductive material layer 19 - 8 provided with a via conductor 24 - 7 connected to a line conductor 23 - 7 .

[0028] Fig.17 Yes means Figure 2 The diagram showing a portion of the inductor 11 is a plan view showing a non-conductive material layer 19 - 8 provided with a line conductor 23 - 8 connected to a via conductor 24 - 7 .

[0029] Fig.18 Yes means Figure 2 The diagram showing a portion of the inductor 11 is a cross-sectional view showing a non-conductive material layer 19 - 9 provided with a via conductor 24 - 8 connected to a line conductor 23 - 8 .

[0030] Fig.19 Yes means Figure 2 The diagram showing a portion of the inductor 11 is a plan view showing a non-conductive material layer 19 - 9 provided with a line conductor 23 - 9 connected to a via conductor 24 - 8 .

[0031] Fig. 20 Yes means Figure 2 The diagram showing a portion of the inductor 11 is a cross-sectional view showing a non-conductive material layer 19 - 10 provided with a via conductor 24 - 9 connected to a line conductor 23 - 9 .

[0032] Fig.21 Yes means Figure 2 The diagram showing a portion of the inductor 11 is a plan view showing a non-conductive material layer 19 - 10 provided with a line conductor 23 - 10 connected to a via conductor 24 - 9 .

[0033] Fig. 22 Yes means Figure 2 The diagram showing a portion of the inductor 11 is a cross-sectional view showing a non-conductive material layer 19 - 11 provided with a via conductor 24 - 10 connected to a line conductor 23 - 10 .

[0034] Fig.23 Yes means Figure 2 The diagram showing a portion of the inductor 11 is a plan view showing a non-conductive material layer 19 - 11 provided with a line conductor 23 - 11 connected to a via conductor 24 - 10 .

[0035] Fig.24 Yes means Figure 2 The diagram showing a portion of the inductor 11 is a cross-sectional view showing a non-conductive material layer 19 - 12 provided with a via conductor 24 - 11 connected to a line conductor 23 - 11 .

[0036] Fig.25 Yes means Figure 2 The diagram of a portion of the inductor 11 shown is a plan view showing a non-conductive material layer 19 - 12 provided with a wire conductor 23 - 12 connected to the via conductor 24 - 11 and providing the second end portion 22 of the coil 20 .

[0037] Fig.26 The perspective view is in the axial direction of the coil 20. Figure 1 Another figure shows the inductor 11 shown.

[0038] Fig. 27 The perspective view is in the axial direction of the coil 20. Figure 1 Another figure showing the inductor 11 shown.

[0039] Fig.28 The inductor 11A according to the second embodiment of the present invention is equivalent to Figure 2 .

[0040] Fig.29 The inductor 11B according to the third embodiment of the present invention is equivalent to Figure 2 .

[0041] Fig.30 The inductor 11C according to the third embodiment of the present invention is equivalent to Figure 2 .

[0042] Fig.31 It is a perspective view showing an inductor 11D according to a fourth embodiment of the present invention in a see-through manner.

[0043] Fig.32 The perspective view is in the axial direction of the coil 20D. Fig.31 The inductor 11D shown in the figure is equivalent to Figure 2.

[0044] Description of Reference Numerals

[0045] 11, 11A to 11D...inductor; 12...component body; 19...non-conductive material layer; 20, 20A to 20D...coil; 23...wire conductor; 24...conductive conductor (long side conductive conductor); 25...pad portion (long side pad portion); 30...wire wiring portion. DETAILED DESCRIPTION

[0046] The inductor of the present invention is described below. The present invention is not limited to the following structure, and can be appropriately changed within the scope of the present invention. In addition, a structure in which a plurality of the preferred structures described below are combined is also the present invention.

[0047] The embodiments shown below are examples, and it is of course possible to replace or combine parts of the structures shown in different embodiments. After the second embodiment, the description of matters common to the first embodiment is omitted, and the differences are mainly described. In particular, the same effects brought about by the same structure are not mentioned in sequence in each embodiment.

[0048] In the following description, when the embodiments are not particularly distinguished, they are simply referred to as "the inductor of the present invention".

[0049] The drawings shown below are schematic diagrams, and their dimensions, aspect ratios, and other aspects may differ from those of actual products.

[0050] In this specification, terms indicating the relationship between elements (for example, "parallel", "perpendicular", "orthogonal", etc.) and terms indicating the shape of an element mean not only strict textual forms but also substantially equivalent ranges, such as a range containing a difference of approximately several percent.

[0051] Reference Figures 1 to 11 , the inductor 11 according to the first embodiment of the present invention will be described.

[0052] The inductor 11 includes a component body 12. The component body 12 is made of a non-conductive material including at least one of glass, resin, and ferrite. In addition, when the component body 12 is made of a molded body such as resin, it may also contain non-magnetic fillers such as silicon dioxide, magnetic fillers such as ferrite or metal magnetic bodies. In addition, it may be a structure in which a plurality of materials such as glass, ferrite, and resin are combined. The component body 12 has a rectangular parallelepiped shape. The rectangular parallelepiped shape may be a shape in which the edge line part and the corner part are rounded or chamfered, for example.

[0053] More specifically, if Figure 1 As shown, the rectangular component body 12 has: a mounting surface 13 facing the mounting substrate side, a top surface 14 opposite to the mounting surface 13, a first side surface 15 and a second side surface 16 connecting the mounting surface 13 and the top surface 14 and opposite to each other, and a first end surface 17 and a second end surface 18 respectively connecting the mounting surface 13 and the top surface 14 and the first side surface 15 and the second side surface 16 and opposite to each other.

[0054] The component body 12 has a stacked structure formed by stacking a plurality of non-conductive material layers 19 made of the above-mentioned non-conductive material. The plurality of non-conductive material layers 19 are stacked from the first side 15 to the second side 16, and the first side 15 and the second side 16 of the component body 12 are provided by the main surfaces of the non-conductive material layers 19 located at each end in the stacking direction.

[0055] like Figure 2 As shown, a coil 20 is arranged inside the component body 12. The coil 20 extends along a spiral track. The axis of the coil 20 is oriented in a direction orthogonal to the side surface 15 and the side surface 16, that is, in a direction parallel to the mounting surface 13. The coil 20 has a first end 21 and a second end 22 opposite to each other, and has a plurality of wire conductors 23 and a plurality of conducting conductors between the first end 21 and the second end 22, wherein the plurality of wire conductors 23 extend along the interface of any one of the plurality of non-conductive material layers 19, and the plurality of conducting conductors penetrate any one of the non-conductive material layers 19 in the thickness direction. In addition, in Figure 2 In the figure, the illustration of the via conductor is omitted. In the present embodiment, all the via conductors are long-side via conductors extending along the long sides of the wire conductor 23. The wire conductor 23 has a pad portion 25 connected to the via conductor at one end thereof. In addition, the wire conductor 23 has a wire wiring portion 30 connected to the pad portion 25 at each portion other than one end thereof. In the coil 20, a shape extending along a spiral track is provided as a whole by alternately connecting the above-mentioned wire conductor 23 and the via conductor. The pad portion 25 includes a long-side pad portion connected to the long-side via conductor. In the present embodiment, all the pad portions 25 shown in the figure are long-side pad portions connected to the long-side via conductor. The figure mark "25" used to indicate the pad portion is directly used for the long-side pad portion. In addition, there is a case where the interfaces of the multiple non-conductive material layers 19 are unclear due to firing, etc.

[0056] In this manual, if Figure 2 As shown, when looking through along the axial direction of the coil, the direction orthogonal to the extension direction of the wire conductor is taken as the width direction of the wire conductor and the width direction of the pad portion and the wire wiring portion of the wire conductor. In addition, the width direction dimensions of the wire conductor, the pad portion and the wire wiring portion are the dimensions of the wire conductor, the pad portion and the wire wiring portion in the width direction.

[0057] In the present embodiment, the width dimension of the wire conductor 23 varies between the long side pad portion 25 and the wire wiring portion 30, and the width dimension of the long side pad portion 25 is larger than the width dimension of the wire wiring portion 30. Therefore, the width dimension of the long side via conductor connected to the long side pad portion 25 can also be increased, and the connection reliability between the wire conductor 23 and the long side via conductor can be ensured.

[0058] In addition, in this specification, the width dimension of the via conductor is a dimension in a direction perpendicular to the extension direction of the line conductor connected to the via conductor. However, in the case where the via conductor is a long-side via conductor, the width dimension of the long-side via conductor can also be said to be a dimension in a direction perpendicular to the long-side direction of the long-side via conductor.

[0059] In the present embodiment, the long side pad portion 25 is a uniform pad portion having a uniform width dimension. The width dimension of the uniform pad portion is the same regardless of the position in the extension direction of the line conductor 23. That is, the width dimension of the uniform pad portion does not change in the extension direction of the line conductor 23. In addition, here, the line conductor 23 means the line conductor 23 having the uniform pad portion.

[0060] The wire wiring portion 30 is a uniform wire wiring portion having a uniform width dimension. The width dimension of the uniform wire wiring portion is the same regardless of the position in the extension direction of the wire conductor 23. That is, the width dimension of the uniform wire wiring portion does not change in the extension direction of the wire conductor 23. In addition, here, the wire conductor 23 means the wire conductor 23 having the wire wiring portion 30.

[0061] In addition, if Figure 2 As shown, when viewed from the axial direction of the coil 20, the arrangement positions of all the wire wiring portions 30 are aligned. More specifically, the center positions of all the wire wiring portions 30 in the width direction are located on the same closed curve and do not deviate from the curve.

[0062] The first external terminal electrode 26 and the second external terminal electrode 27 are provided on the outer surface of the component body 12, and the first external terminal electrode 26 and the second external terminal electrode 27 are connected to the first end 21 and the second end 22 of the coil 20, respectively. The first external terminal electrode 26 and the second external terminal electrode 27 are provided so as to be exposed from the outer surface of the component body 12, and are provided over the mounting surface 13 of the component body 12 and each of the first end surface 17 and the second end surface 18 adjacent thereto. If the first external terminal electrode 26 and the second external terminal electrode 27 are provided in such a form, when the inductor 11 is mounted on the mounting substrate, a solder fillet of an appropriate form can be formed, so that a mounting state with high reliability in both electrical connection and mechanical bonding can be obtained. The first external terminal electrode 26 and the second external terminal electrode 27 are provided so as to penetrate each of the plurality of non-conductive material layers 19 in the thickness direction except for a few non-conductive material layers 19 located at both ends in the stacking direction.

[0063] In addition, there is no particular limitation on the surface of the component body 12 where the first external terminal electrode 26 and the second external terminal electrode 27 are provided. For example, they may be provided only on the mounting surface 13 of the component body 12 or only on the first end face 17 and the second end face 18 of the component body 12 .

[0064] The coil 20 and the external terminal electrodes 26 and 27 are formed, for example, by patterning a conductor film composed of a conductive paste containing Ag as a conductive component. In addition, the non-conductive material layer 19 is formed by patterning a non-conductive material film as needed, the non-conductive material film being composed of a paste containing a non-conductive material, wherein the non-conductive material contains, for example, at least one of glass, resin, and ferrite. The patterning of the conductor film and the patterning of the non-conductive material film are, for example, performed by applying photolithography, semi-additive method, screen printing method, transfer method, etc.

[0065] Although not shown, a plated film may be formed on the portions of the external terminal electrodes 26 and 27 exposed from the component body 12. The plated film includes, for example, a Ni plated layer and a Sn plated layer on the Ni plated layer.

[0066] like Figure 2 As shown, when viewed along the axial direction of the coil 20, the center position of the width direction of the long side pad portion 25 is offset from the center position of the width direction of the wire wiring portion 30 toward at least one of the inner peripheral side and the outer peripheral side of the spiral track. As a result, the long side pad portion 25 extends from at least one of the inner peripheral edge and the outer peripheral edge of the wire wiring portion 30.

[0067] As described above, it is preferred that the length of the long side conducting conductor in the long side direction is longer, and the thickness of the conducting conductor in the stacking direction is thicker. Therefore, when the long side conducting conductor is offset to the inner circumference of the spiral track, the effect of blocking the magnetic flux passing through the inside of the coil is greater, and there is a possibility that the degradation of the Q characteristic cannot be suppressed. In contrast, in the present embodiment, the thickness of the long side pad portion 25 in the stacking direction can also be made thinner than the conducting conductor. Therefore, as described above, the center position of the long side pad portion 25 in the width direction is offset from the center position of the wire wiring portion 30 in the width direction to at least one of the inner circumference and the outer circumference of the spiral track. Compared with the case where the long side conducting conductor is offset to the inner circumference of the spiral track, the effect of blocking the magnetic flux passing through the inside of the coil 20 is smaller, and the degradation of the Q characteristic can be suppressed. That is, the Q characteristic can be improved.

[0068] In this embodiment, from the perspective of connection reliability with the long-side conductive conductor taking into account stacking offset and the like, the long-side pad portion 25 is preferably a structure that extends outward or inward relative to the wire wiring portion 30, and is particularly preferably a structure that extends outward relative to the wire wiring portion 30 except between the wire conductors 23 facing the first external terminal electrode 26 and the second external terminal electrode 27 and the surface of the component body 12 and the wire conductor 23. This is because the results of multiple electric field / structure simulations show that internal stress is easily concentrated between the wire conductors facing the external terminal electrodes and the surface of the component body and the wire conductor. Although the mechanism of this stress concentration is unclear, it can be considered that it is due to the Lorentz force generated between the wire conductors facing the external terminal electrodes and the external stress generated on the surface of the component body. Therefore, by becoming the above-mentioned preferred structure, it is possible to obtain a higher reliability that also suppresses the increase of internal stress and a higher Q characteristic that minimizes the shielding of the magnetic flux passing through the coil by the long-side pad portion 25.

[0069] In more detail, Figure 2 As shown, when viewed in perspective along the axial direction of the coil 20, the center position in the width direction of at least the portion 25a of the long side pad portion 25 that is most adjacent to the first external terminal electrode 26 or the second external terminal electrode 27 is preferably offset from the center position in the width direction of the wire wiring portion 30 toward the inner circumference of the spiral track.

[0070] In addition, in this specification, the portion most adjacent to the first external terminal electrode or the second external terminal electrode means a portion of the portion adjacent to the first external terminal electrode or the second external terminal electrode wherein the interval between the outer periphery of the portion and the inner end surface of the first external terminal electrode or the second external terminal electrode is within the range of s1+3% (including the boundary value) when the minimum value of the interval is set to s1.

[0071] In this specification, “the inner end surface of the external terminal electrode” means a surface of the external terminal electrode on the opposite side to the surface exposed on the outer surface of the inductor, which surface faces the coil.

[0072] In addition, if Figure 2 As shown, when viewed in perspective along the axial direction of the coil 20, the center position in the width direction of at least the portion 25b of the long side pad portion 25 that is most adjacent to the surface of the component body 12 is preferably offset from the center position in the width direction of the wire wiring portion 30 toward the inner circumference of the spiral track.

[0073] In addition, in this specification, the portion closest to the surface of the component body means a portion of the portion adjacent to the surface of the component body, where the interval between the outer periphery of the portion and the surface of the component body is within the range of s2+3% (including the boundary value) when the minimum value of the interval is set to s2. In addition, the surface of the component body closest to the portion is preferably the top surface of the component body.

[0074] In addition, when all the long-side pad portions 25 extend toward the inner circumference of the spiral track, all the long-side pad portions 25 block the magnetic flux passing through the inside of the coil 20, so it is difficult to obtain the improvement effect of the Q characteristic. On the other hand, when all the long-side pad portions 25 extend toward the outer circumference of the spiral track, the improvement effect of the Q characteristic is improved, but as mentioned above, it is possible that a high stress portion is generated inside the component body 12 (specifically, the peripheral portion of the first external terminal electrode 26 and the second external terminal electrode 27), or the high stress portion inside the component body 12 is close to the surface of the component body 12 (for example, the top surface 14), resulting in cracks, notches, cracks, etc. in the component body 12.

[0075] Therefore, in this embodiment, if Figure 2 As shown, when viewed in the axial direction of the coil 20, the long side pad portion 25 includes a plurality of long side pad portions 25 that are offset from the center position in the width direction of the wire wiring portion 30 in different directions. Thus, the direction and position in which the long side pad portion 25 extends from the wire wiring portion 30 can be adjusted. Therefore, the shielding of the magnetic flux passing through the inside of the coil 20 by the long side pad portion 25 can be suppressed to a minimum and the Q characteristic can be improved, and the generation of cracks, notches and cracks in the component body 12 caused by the increase of internal stress can be suppressed.

[0076] More specifically, there are provided a plurality of long side pad portions 25c whose center positions in the width direction are offset from the center positions in the width direction of the wire wiring portion 30 only toward the inner peripheral side of the spiral track, and a long side pad portion 25d whose center positions in the width direction are offset from the center positions in the width direction of the wire wiring portion 30 toward both the inner peripheral side and the outer peripheral side of the spiral track.

[0077] Furthermore, the long-side land portion 25 may include a long-side land portion whose center position in the width direction is offset from the center position in the width direction of the wire wiring portion 30 only toward the outer peripheral side of the spiral track.

[0078] In addition, if Figure 2 As shown, when viewed along the axial direction of the coil 20, the long side pad portion 25d is also a long side pad portion whose direction of deviation from the center position in the width direction of the wire wiring portion 30 is different depending on the position in the extension direction of the wire conductor 23. As a result, the direction and position of the long side pad portion 25 extending from the wire wiring portion 30 can also be adjusted. Therefore, the internal shielding of the coil 20 by the long side pad portion 25 can be minimized and the Q characteristic can be improved, and the generation of cracks, notches and cracks in the component body 12 caused by the increase of stress can be suppressed.

[0079] More specifically, in the long side pad portion 25d, the direction of deviation from the center position in the width direction of the wire wiring portion 30 changes from the inner circumference to the outer circumference of the spiral track in the extending direction of the wire conductor 23. In addition, the wire conductor 23 means the wire conductor 23 having the long side pad portion 25d.

[0080] In addition, if Figure 2 As shown, if the shortest distance between the corner 31 of the first external terminal electrode 26 or the second external terminal electrode 27 facing the wire wiring portion 30 and the outer periphery of the wire wiring portion 30 when viewed in the axial direction of the coil 20 is set to d, the wire wiring portion 30 has a first region and a second region, wherein the first region is a region where the interval d1 from the inner end surface of the first external terminal electrode 26 or the second external terminal electrode 27 or the surface of the component body 12 is the same as or less than d, and the second region is a region where the interval d2 from the inner end surface of the first external terminal electrode 26 or the second external terminal electrode 27 or the surface of the component body 12 is greater than d. Furthermore, as Figure 2As shown, when the coil 20 is viewed along the axial direction, the center position of the portion of the long side pad portion 25 overlapping the first region (region of interval d1) in the width direction is offset from the center position of the first region in the width direction to the inner peripheral side of the spiral track, and when the coil 20 is viewed along the axial direction, the center position of the portion of the long side pad portion 25 overlapping the second region (region of interval d2) in the width direction is offset from the center position of the second region in the width direction to the outer peripheral side of the spiral track. As a result, the internal stress concentrated between the wire conductor 23 opposed to the first external terminal electrode 26 and the second external terminal electrode 27 will not be increased more reliably, and the internal stress of the surface of the component body 12 that is weak to external impact and the close part of the wire conductor 23 will not be increased more reliably, and a high Q characteristic can be obtained in which the shielding of the magnetic flux passing through the coil by the long side pad portion 25 is minimized.

[0081] The shortest distance d means the shortest distance between each corner of the first external terminal electrode 26 and the second external terminal electrode 27 facing the wire wiring portion 30 and the outer periphery of the wire wiring portion 30 when viewed along the axial direction of the coil 20. In this embodiment, usually, Figure 2 As shown, the distance between the corner portion 31 on the mounting surface 13 side and the outer peripheral edge of the wire wiring portion 30 is the shortest among the plurality of corner portions.

[0082] In addition, the interval between the first region or the second region and the inner end surface of the first external terminal electrode 26 or the second external terminal electrode 27, or the interval between the first region or the second region and the surface of the component body 12 means the interval between the outer edge of the first region or the second region and the inner end surface of the first external terminal electrode 26 or the second external terminal electrode 27, or the interval between the outer edge of the first region or the second region and the surface of the component body 12.

[0083] The interval d1 between the first region and the inner end surface of the first external terminal electrode 26 or the second external terminal electrode 27 or the surface of the component body 12 being the same as d means that the interval is within the range of d±3% (including the boundary value).

[0084] In addition, the interval d1 or d2 between the first region or the second region and the inner end surface of the first external terminal electrode 26 or the second external terminal electrode 27, or the first region or the second region and the surface of the component body 12 is less than d or greater than d, which means that the interval is lower than the range of d±3% or exceeds the range of d±3%, respectively.

[0085] In the inductor of the present invention, various dimensions and distances can be measured, for example, by the following method. That is, a transmission image obtained by observing the inductor from the axial direction of the coil is captured using an X-ray fluoroscopy / measurement CT system, and the transmission image is processed to measure various dimensions and distances. As an X-ray fluoroscopy / measurement CT system, for example, a system made by Comet Technology can be used. In addition, the above-mentioned shortest distance d is, for example, Figure 2 In the example shown, the radius of the circle C can be set to be a circle C centered at the corner 31 of the first external terminal electrode 26 or the second external terminal electrode 27 and approximate to the arc-shaped portion of the outer peripheral edge of the wire portion 30 .

[0086] The shortest distance d is not particularly limited, but is preferably not less than 10 μm. This can suppress short circuits between the first and second external terminal electrodes 26 and 27 and the wire wiring portion 30 .

[0087] As described above, the long side pad portion 25 includes: a first portion (a portion extending toward the inner circumference of the spiral track) whose center position in the width direction is offset from the center position in the width direction of the wire wiring portion 30 toward the inner circumference of the spiral track, and a second portion (a portion extending toward the outer circumference of the spiral track) whose center position in the width direction is offset from the center position in the width direction of the wire wiring portion 30 toward the outer circumference of the spiral track. Moreover, when viewed in perspective along the axial direction of the coil 20, the interval between the area of ​​the wire wiring portion 30 overlapping with the first portion and the inner end surface of the first external terminal electrode 26 or the second external terminal electrode 27, or the interval between the area of ​​the wire wiring portion 30 overlapping with the first portion and the surface of the component body 12 is smaller than the interval between the area of ​​the wire wiring portion 30 overlapping with the second portion and the inner end surface of the first external terminal electrode 26 or the second external terminal electrode 27, or the interval between the area of ​​the wire wiring portion 30 overlapping with the second portion and the surface of the component body 12. This also makes it possible to obtain high reliability by suppressing an increase in internal stress and high Q characteristics by minimizing shielding of the magnetic flux passing through the coil by the long-side land portion 25 .

[0088] In addition, the interval between the area overlapping with the first part or the second part and the inner end surface of the first external terminal electrode 26 or the second external terminal electrode 27, or the interval between the area overlapping with the first part or the second part and the surface of the component body 12 means the interval between the outer edge of the area overlapping with the first part or the second part and the inner end surface of the first external terminal electrode 26 or the second external terminal electrode 27, or the interval between the outer edge of the area overlapping with the first part or the second part and the surface of the component body 12.

[0089] Main reference Figure 3 to Figure 11The connection of the plurality of wire conductors 23 in the coil 20 will be described in more detail.

[0090] exist Figure 2 The wire conductor 23 shown in the figure includes 12 wire conductors 23 connected via each of the 11 via conductors. The via conductor includes a long side via conductor having a long side shape extending along the wire conductor 23. In the present embodiment, all the illustrated via conductors are long side via conductors. The figure mark "24" used to indicate the via conductor is also directly used for the long side via conductor. In addition, in the inductor of the present invention, the via conductor may also include a via conductor other than the long side via conductor, and the pad portion may also include a pad portion connected to the via conductor other than the long side via conductor. Here, the via conductor other than the long side via conductor means a general via conductor having a shape that does not extend along the wire conductor. The pad portion may also include a pad portion other than the long side pad portion. The pad portion other than the long side pad portion means a general pad portion having a shape that does not extend along the wire conductor.

[0091] In addition, Figure 3 to Figure 11 In order to distinguish the 11 via conductors from each other, the 11 via conductors are respectively denoted by reference numerals “24-1”, “24-2”, “24-3”, “24-4”, “24-5”, “24-6”, “24-7”, “24-8”, “24-9”, “24-10” and “24-11”.

[0092] In addition, in order to distinguish between Figure 2 In the figure, the 12 wire conductors 23 are respectively marked with reference numerals "23-1", "23-2", "23-3", "23-4", "23-5", "23-6", "23-7", "23-8", "23-9", "23-10", "23-11" and "23-12". The wire conductors 23-1, 23-2, 23-3, 23-4, 23-5, 23-6, 23-7, 23-8, 23-9, 23-10, 23-11 and 23-12 are respectively provided to extend along different interfaces between the non-conductive material layers 19.

[0093] In addition, the pad portions 25 provided at one end portions of each of the line conductors 23-1, 23-2, 23-3, 23-4, 23-5, 23-6, 23-7, 23-8, 23-9, 23-10 and 23-11 are denoted by reference numerals “25-1”, “25-2”, “25-3”, “25-4”, “25-5”, “25-6”, “25-7”, “25-8”, “25-9”, “25-10” and “25-11”.

[0094] In addition, the wire wiring portion 30 provided for the portion other than one end portion of each of the wire conductors 23-1, 23-2, 23-3, 23-4, 23-5, 23-6, 23-7, 23-8, 23-9, 23-10, 23-11 and 23-12 is marked with the figure marks "30-1", "30-2", "30-3", "30-4", "30-5", "30-6", "30-7", "30-8", "30-9", "30-10", "30-11" and "30-12".

[0095] In addition, the non-conductive material layer 19 having the line conductors 23-1, 23-2, 23-3, 23-4, 23-5, 23-6, 23-7, 23-8, 23-9, 23-10, 23-11 and 23-12 provided on the main surface is denoted by reference numerals "19-1", "19-2", "19-3", "19-4", "19-5", "19-6", "19-7", "19-8", "19-9", "19-10", "19-11" and "19-12". The non-conductive material layers 19-1, 19-2, 19-3, 19-4, 19-5, 19-6, 19-7, 19-8, 19-9, 19-10, 19-11 and 19-12 are stacked from bottom to top in this order.

[0096] A first lead conductor 28 and a second lead conductor 29 are connected to the first end 21 and the second end 22 of the coil 20, respectively. The first lead conductor 28 and the second lead conductor 29 are provided by extensions of the wire conductors 23-1 and 23-12 that respectively locate the first end 21 and the second end 22 of the coil 20.

[0097] In addition, in this specification, "wire conductor", "lead conductor" and "external terminal electrode" are defined and distinguished from each other as follows. "Wire conductor" refers to the part that is surrounded in a perspective state along the axial direction of the coil, "lead conductor" refers to the part that is offset and extends from the above-mentioned surrounded part, and "external terminal electrode" refers to the part exposed from the component body.

[0098] First, if Figure 3 As shown, on the non-conductive material layer 19 - 1 , the line conductor 23 - 1 connected to the first external terminal electrode 26 via the first lead conductor 28 extends in the clockwise direction to the long-side pad portion 25 - 1 via the line wiring portion 30 - 1 .

[0099] Next, Figure 4The non-conductive material layer 19-2 shown is stacked on the non-conductive material layer 19-1. The long side via conductor 24-1 is provided to penetrate the non-conductive material layer 19-2. The long side via conductor 24-1 connects the line conductor 23-1 and the long side pad portion 25-1. Figure 5 The wire conductor 23-2 is shown.

[0100] Next, if Figure 5 As shown, on the non-conductive material layer 19 - 2 , the line conductor 23 - 2 extends from the position of the long-side via conductor 24 - 1 to the long-side pad portion 25 - 2 in the clockwise direction via the line wiring portion 30 - 2 .

[0101] Next, Figure 6 The non-conductive material layer 19-3 shown is stacked on the non-conductive material layer 19-2. The long side via conductor 24-2 is provided to penetrate the non-conductive material layer 19-3. The long side via conductor 24-2 connects the line conductor 23-2 and the long side pad portion 25-2. Figure 7 The wire conductor 23-3 is shown.

[0102] Next, if Figure 7 As shown, on the non-conductive material layer 19 - 3 , the line conductor 23 - 3 extends from the position of the long-side via conductor 24 - 2 to the long-side pad portion 25 - 3 in the clockwise direction via the line wiring portion 30 - 3 .

[0103] Next, Figure 8 The non-conductive material layer 19-4 shown is stacked on the non-conductive material layer 19-3. The long side via conductor 24-3 is provided to penetrate the non-conductive material layer 19-4. The long side via conductor 24-3 connects the line conductor 23-3 and the line conductor 23-4 shown in FIG. 9-1 via the long side pad portion 25-3.

[0104] Next, as shown in FIG. 9-1 , on the non-conductive material layer 19 - 4 , the line conductor 23 - 4 extends from the position of the long-side via conductor 24 - 3 to the long-side land portion 25 - 4 in the clockwise direction via the line wiring portion 30 - 4 .

[0105] Here, the features of the line conductor 23 - 4 will be further described with reference to FIG. 9 - 1 and FIG. 9 - 2 .

[0106] The line wiring portion 30 - 4 of the line conductor 23 - 4 is a line-symmetric line wiring portion 30 a having a line-symmetric shape. As shown in FIG. 9-1 , the line-symmetric line wiring portion 30 a has a line-symmetric shape with respect to the symmetry axis A1.

[0107] The long side pad portion 25 - 4 is connected to the line-symmetric line wiring portion 30 a , and as shown in FIG. 9-2 , includes a third portion 25 m and a fourth portion 25 n , which are sequentially arranged in the extending direction of the line conductor 23 - 4 .

[0108] 9-2 , the line-symmetric wiring portion 30a is folded back on the symmetry axis A1 toward the third portion 25m and the fourth portion 25n to form an imaginary wiring portion 30b. In FIG. 9-2 , the imaginary wiring portion 30b is indicated by a two-dot chain line.

[0109] Moreover, as shown in FIG. 9-2 , the inner periphery of the third portion 25m of the long side pad portion 25-4 is located on the inner periphery of the imaginary line wiring portion 30b, the outer periphery of the third portion 25m of the long side pad portion 25-4 extends from the outer periphery of the imaginary line wiring portion 30b, the inner periphery of the fourth portion 25n of the long side pad portion 25-4 extends from the inner periphery of the imaginary line wiring portion 30b, and the outer periphery of the fourth portion 25n of the long side pad portion 25-4 is located on the outer periphery of the imaginary line wiring portion 30b. Thus, the direction and position in which the long side pad portion 25-4 extends from the line wiring portion 30-4 can be adjusted. Therefore, the Q characteristic can be improved by minimizing the shielding of the inside of the coil 20 by the long side pad portion 25-4, and the generation of cracks, notches, and cracks in the component body 12 caused by the increase of stress can be suppressed.

[0110] In addition, as shown in FIG. 9-2 , the long-side land portion 25 - 4 may be bent between the third portion 25 m and the fourth portion 25 n .

[0111] Next, Fig.10 The non-conductive material layer 19-5 shown is stacked on the non-conductive material layer 19-4. The long side via conductor 24-4 is provided to penetrate the non-conductive material layer 19-5. The long side via conductor 24-4 connects the line conductor 23-4 and the long side pad portion 25-4. Fig.11 The wire conductor 23-5 is shown.

[0112] Next, if Fig.11 As shown, on the non-conductive material layer 19 - 5 , the line conductor 23 - 5 extends from the position of the long side via conductor 24 - 4 to the long side pad portion 25 - 5 in the clockwise direction via the line wiring portion 30 - 5 .

[0113] In addition, the line wiring portion 30-5 is a line-symmetric line wiring portion having a shape that is line-symmetric relative to the symmetry axis A2, and the long side pad portion 25-5, like the long side pad portion 25-4, includes a third portion extending toward the outer peripheral side of the imaginary line wiring portion and a fourth portion extending toward the inner peripheral side of the imaginary line wiring portion.

[0114] Next, Fig.12 The non-conductive material layer 19-6 shown is stacked on the non-conductive material layer 19-5. The long side via conductor 24-5 is provided to penetrate the non-conductive material layer 19-6. The long side via conductor 24-5 connects the line conductor 23-5 and the long side pad portion 25-5. Fig.13 The wire conductor 23-6 is shown.

[0115] Next, if Fig.13 As shown, on the non-conductive material layer 19 - 6 , the line conductor 23 - 6 extends from the position of the long-side via conductor 24 - 5 to the long-side pad portion 25 - 6 in the clockwise direction via the line wiring portion 30 - 6 .

[0116] Next, Fig.14 The non-conductive material layer 19-7 shown is stacked on the non-conductive material layer 19-6. The long side via conductor 24-6 is provided to penetrate the non-conductive material layer 19-7. The long side via conductor 24-6 connects the line conductor 23-6 and the long side pad portion 25-6. Fig.15 The wire conductor 23-7 is shown.

[0117] Next, if Fig.15 As shown, on the non-conductive material layer 19 - 7 , the line conductor 23 - 7 extends from the position of the long side via conductor 24 - 6 to the long side pad portion 25 - 7 in the clockwise direction via the line wiring portion 30 - 7 .

[0118] In addition, the line wiring portion 30-7 is a line-symmetric line wiring portion having a shape that is line-symmetric relative to the symmetry axis A3, and the long side pad portion 25-7, like the long side pad portion 25-4, includes a third portion extending toward the outer peripheral side of the imaginary line wiring portion and a fourth portion extending toward the inner peripheral side of the imaginary line wiring portion.

[0119] Next, Fig.16 The non-conductive material layer 19-8 shown is stacked on the non-conductive material layer 19-7. The long side via conductor 24-7 is provided to penetrate the non-conductive material layer 19-8. The long side via conductor 24-7 connects the line conductor 23-7 and the long side pad portion 25-7. Fig.17 The wire conductor 23-8 is shown.

[0120] Next, if Fig.17 As shown, on the non-conductive material layer 19 - 8 , the line conductor 23 - 8 extends from the position of the long side via conductor 24 - 7 to the long side pad portion 25 - 8 in the clockwise direction via the line wiring portion 30 - 8 .

[0121] In addition, the line wiring portion 30-8 is a line-symmetric line wiring portion having a shape that is line-symmetric relative to the symmetry axis A4, and the long side pad portion 25-8, like the long side pad portion 25-4, includes a third portion extending toward the outer peripheral side of the imaginary line wiring portion and a fourth portion extending toward the inner peripheral side of the imaginary line wiring portion.

[0122] Next, Fig.18 The non-conductive material layer 19-9 shown is stacked on the non-conductive material layer 19-8. The long side via conductor 24-8 is provided to penetrate the non-conductive material layer 19-9. The long side via conductor 24-8 connects the line conductor 23-8 and the long side pad portion 25-8. Fig.19 The wire conductor 23-9 is shown.

[0123] Next, if Fig.19 As shown, on the non-conductive material layer 19 - 9 , the line conductor 23 - 9 extends from the position of the long side via conductor 24 - 8 to the long side pad portion 25 - 9 in the clockwise direction via the line wiring portion 30 - 9 .

[0124] Next, Fig. 20 The non-conductive material layer 19-10 shown is stacked on the non-conductive material layer 19-9. The long side via conductor 24-9 is provided to penetrate the non-conductive material layer 19-10. The long side via conductor 24-9 connects the line conductor 23-9 and the long side pad portion 25-9. Fig.21 The wire conductor 23-10 is shown.

[0125] Next, if Fig.21 As shown, on the non-conductive material layer 19 - 10 , the line conductor 23 - 10 extends from the position of the long side via conductor 24 - 9 to the long side pad portion 25 - 10 in the clockwise direction via the line wiring portion 30 - 10 .

[0126] Next, Fig. 22 The non-conductive material layer 19-11 shown is stacked on the non-conductive material layer 19-10. The long side via conductor 24-10 is provided to penetrate the non-conductive material layer 19-11. The long side via conductor 24-10 connects the line conductor 23-10 and the long side pad portion 25-10. Fig.23 The wire conductor 23-11 is shown.

[0127] Next, if Fig.23 As shown, on the non-conductive material layer 19 - 11 , the line conductor 23 - 11 extends from the position of the long side via conductor 24 - 10 to the long side pad portion 25 - 11 in the clockwise direction via the line wiring portion 30 - 11 .

[0128] In addition, the line wiring portion 30-11 is a line-symmetric line wiring portion having a shape that is line-symmetric relative to the symmetry axis A5, and the long side pad portion 25-11, like the long side pad portion 25-4, includes a third portion extending toward the outer peripheral side of the imaginary line wiring portion and a fourth portion extending toward the inner peripheral side of the imaginary line wiring portion.

[0129] Next, Fig.24 The non-conductive material layer 19-12 shown is stacked on the non-conductive material layer 19-11. The long side via conductor 24-11 is provided to penetrate the non-conductive material layer 19-12. The long side via conductor 24-11 connects the line conductor 23-11 and the long side pad portion 25-11. Fig.25 The wire conductor 23-12 is shown.

[0130] Next, if Fig.25 As shown, on the non-conductive material layer 19 - 12 , the line conductor 23 - 12 extends from the position of the long-side via conductor 24 - 11 in the clockwise direction through the line wiring portion 30 - 12 and is connected to the second external terminal electrode 27 through the second lead conductor 29 .

[0131] In addition, in the present embodiment, the long side pad portion 25 is provided only at one end of each line conductor 23, but the line conductors 23 other than the line conductor 23-1 and the line conductor 23-12 connected to the lead conductor 28 and the lead conductor 29, respectively, may also be provided with the long side pad portion 25 at both ends. Figure 5 In the wire conductor 23-2 shown in the figure, a portion corresponding to the long side land portion 25-2 may be provided at the end opposite to the end where the long side land portion 25-2 is provided. Figure 3 The long side land portion 25 - 1 of the illustrated line conductor 23 - 1 has the same shape as the long side land portion.

[0132] Main reference Figure 26-27 The structure of the plurality of long-side via conductors 24 in the coil 20 will be described in more detail.

[0133] like Fig.26 As shown, the width dimension of the long side via conductor 24 may be larger than the width dimension of the line wiring portion 30. In this case, the connection reliability between the line conductors 23 can be improved and the above-mentioned high reliability and high Q characteristics can be achieved.

[0134] like Fig. 27As shown, the width dimension of the long side conducting conductor 24 may be smaller than the width dimension of the wire portion 30, and the long side conducting conductor 24 may not extend from the spiral track when viewed along the axial direction of the coil 20. In this case, the high stress portion can be further retreated from the stress concentration portion and the portion directly subjected to external impact, and the electrode volume of the long side conducting conductor 24 can be reduced. Therefore, higher reliability and higher Q characteristics can be achieved.

[0135] Furthermore, in the inductor of the present invention, the via conductor may include a via conductor having the same width dimension as the wire portion, and the center position of the via conductor in the width direction may not be offset from the center position of the wire portion in the width direction to either the inner circumference or the outer circumference of the spiral track when the coil is viewed from the perspective along the axial direction. Furthermore, the pad portion may include a pad portion having the same width dimension as the wire portion, and the center position of the pad portion in the width direction may not be offset from the center position of the wire portion in the width direction to either the inner circumference or the outer circumference of the spiral track when the coil is viewed from the perspective along the axial direction.

[0136] In any case, generally speaking, the width dimension of the via conductor 24 is the same as the width dimension of the pad portion 25 , or the width dimension of the via conductor 24 is smaller than the width dimension of the pad portion 25 .

[0137] As described above, according to the first embodiment, when viewed in the axial direction of the coil 20, the center position of the long side pad portion 25 in the width direction is offset from the center position of the wire wiring portion 30 in the width direction toward at least one of the inner circumference and the outer circumference of the spiral track, so that the influence of blocking the magnetic flux passing through the inside of the coil 20 is small, and the degradation of the Q characteristic can be suppressed. That is, the Q characteristic can be improved.

[0138] The above-described effects obtained in the first embodiment are also achieved in the second and subsequent embodiments described below.

[0139] Next, refer to Fig.28 , an inductor 11A according to a second embodiment of the present invention will be described. Fig.28 is equivalent to Figure 2 Figure. Fig.28 In, with Figure 2 Corresponding elements are denoted by the same reference numerals, and duplicate descriptions are omitted.

[0140] Fig.28 The inductor 11A shown is Figure 2 As is the case with the inductor 11 shown, the component body 12 has a rectangular parallelepiped shape. However, Fig.28 The shape of the coil 20A of the inductor 11A shown is similar to Figure 2 The shape of the coil 20 of the inductor 11 shown in the figure is different. This means that the coil can take various shapes. In the first embodiment, when the coil 20 is viewed in the axial direction, the coil 20 is a rectangle with rounded corners and the central part of the long side on the mounting surface 13 side protruding to the outer peripheral side. In contrast, in the present embodiment, the coil 20A has two curved portions respectively opposite to the first end face 17 and the second end face 18 of the component body 12 and a straight portion opposite to the top surface 14 of the component body 12. In this way, the coil 20A has a curved portion in the long axis direction (long side direction) of the component body 12. More specifically, when the coil 20 is viewed in the axial direction, the coil 20A is elliptical.

[0141] Fig.28 The inductor 11A shown is Figure 2 Similarly to the case of the inductor 11 shown in the figure, when viewed in the axial direction of the coil 20A, the center position of the width direction of the long side pad portion 25 is offset from the center position of the width direction of the wire wiring portion 30 to at least one of the inner circumference side and the outer circumference side of the spiral track. Therefore, similarly to the case of the first embodiment, since the influence of blocking the magnetic flux passing through the inside of the coil 20A can be reduced, the degradation of the Q characteristic can be suppressed. That is, the Q characteristic can be improved.

[0142] Furthermore, in this embodiment, if Fig.28 As shown, the center position of the width direction of at least a portion 25e of the long side pad portion 25 that is parallel to the top surface 14 of the component body 12 is offset from the center position of the width direction of the wire wiring portion 30 to the inner peripheral side of the spiral track, and the center position of the width direction of at least a portion 25f of the long side pad portion 25 that is not parallel to the top surface 14 is offset from the center position of the width direction of the wire wiring portion 30 to the outer peripheral side of the spiral track. As a result, it is possible to suppress the increase of internal stress in the close portion of the top surface 14 of the component body 12 and the wire conductor 23 that are weak to external impact. In addition, the internal stress concentrated between the wire conductor 23 that is opposite to the first external terminal electrode 26 and the second external terminal electrode 27 will not increase, and a high Q characteristic that minimizes the shielding of the magnetic flux passing through the coil by the long side pad portion 25 can be obtained. Therefore, it is possible to obtain a high reliability that suppresses the increase of internal stress and a high Q characteristic that minimizes the shielding of the magnetic flux passing through the coil by the long side pad portion 25.

[0143] Next, refer to Figure 29-30 , inductors 11B and 11C according to a third embodiment of the present invention will be described. Fig.29 and Fig.30 is equivalent to Figure 2 Figure. Fig.29 and Fig.30In, with Figure 2 Corresponding elements are denoted by the same reference numerals, and duplicate descriptions are omitted.

[0144] exist Fig.29 The inductor 11B and Fig.30 In the inductor 11C shown, the long-side land portion 25 includes an uneven land portion 25g having uneven width dimensions. That is, the width dimensions of the uneven land portion 25g vary depending on the position in the extending direction of the line conductor 23 .

[0145] More specifically, the width dimension of the uneven land portion 25g changes from a relatively small dimension to a relatively large dimension in the extending direction of the line conductor 23. In addition, here, the line conductor 23 means the line conductor 23 having the uneven land portion 25g.

[0146] In addition, if Fig.29 and Fig.30 As shown, the maximum value W of the width direction dimension of the uneven pad portion 25g is greater than the width direction dimension of the wire portion 30, and the minimum value w of the width direction dimension of the uneven pad portion 25g is the same as the width direction dimension of the wire portion 30, or the minimum value w is greater than the width direction dimension of the wire portion 30. Fig.29 and Fig.30 , a state is shown in which the minimum value w of the width direction dimension of the uneven pad portion 25 g is the same as the width direction dimension of the wire wiring portion 30 .

[0147] In addition, if Fig.29 and Fig.30 As shown, the center position in the width direction of the portion of the uneven pad portion 25g whose width direction dimension is larger than the width direction dimension of the wire wiring portion 30 is offset from the center position in the width direction of the wire wiring portion toward the outer peripheral side of the spiral track. As a result, as in the case of the first embodiment, the influence of blocking the magnetic flux passing through the inside of the coil 20B and the coil 20C can be reduced, so that the degradation of the Q characteristic can be suppressed and the Q characteristic can be improved. In addition, the width direction dimension of the long side pad portion 25 can be expanded in an area that does not contribute to the increase of internal stress, and the connection reliability can be maintained. In addition, the shielding of the magnetic flux passing through the inside of the coil by the long side pad portion 25 can be suppressed to a minimum. Therefore, a higher reliability that suppresses the increase of internal stress and a higher Q characteristic that minimizes the shielding of the magnetic flux passing through the inside of the coil by the long side pad portion 25 can be obtained.

[0148] exist Fig.29In the inductor 11B shown, as in the case of the first embodiment, if the shortest distance between the corner 31 of the first external terminal electrode 26 or the second external terminal electrode 27 facing the wire wiring portion 30 and the outer periphery of the wire wiring portion 30 when viewed in the axial direction of the coil 20 is set to d, the uneven pad portion 25g has a first portion and a second portion, wherein the first portion is a portion where the interval d1 from the inner end surface of the first external terminal electrode 26 or the second external terminal electrode 27 or the surface of the component body 12 is the same as or smaller than d, and the second portion is a portion where the interval d2 from the inner end surface of the first external terminal electrode 26 or the second external terminal electrode 27 or the surface of the component body 12 is larger than d. Furthermore, as Fig.29 As shown, the width dimension of the first portion (the portion with interval d1) is smaller than the width dimension of the second portion (the portion with interval d2). As a result, it is possible to suppress the increase of internal stress between the wire conductor 23 facing the first external terminal electrode 26 and the second external terminal electrode 27 where the internal stress is particularly concentrated, and the increase of internal stress between the surface of the component body 12 and the close portion of the wire conductor 23 to which the external impact is directly applied.

[0149] In addition, the interval d1 or d2 between the first part or the second part and the inner end surface of the first external terminal electrode 26 or the second external terminal electrode 27, or the first part or the second part and the surface of the component body 12 means the interval between the outer periphery of the first part or the second part and the inner end surface of the first external terminal electrode 26 or the second external terminal electrode 27, or the outer periphery of the first part or the second part and the surface of the component body 12.

[0150] The interval d1 between the first portion and the inner end surface of the first external terminal electrode 26 or the second external terminal electrode 27 or the surface of the component body 12 being the same as d means that the distance is within the range of d±3% (including the boundary value).

[0151] In addition, the interval d1 or d2 between the first part or the second part and the inner end surface of the first external terminal electrode 26 or the second external terminal electrode 27, or the first part or the second part and the surface of the component body 12 is less than d or greater than d, which means that the interval is lower than the range of d±3% or exceeds the range of d±3%, respectively.

[0152] exist Fig.30 In the inductor 11C shown, the coil 20C has two curved portions facing the first end face 17 and the second end face 18 of the component body 12, respectively, and a straight portion facing the top face 14 of the component body 12. In this way, the coil 20C has a curved portion in the long axis direction (long side direction) of the component body 12. More specifically, when the coil 20 is viewed from above along the axial direction of the coil 20, the coil 20C is elliptical.

[0153] Moreover, if Fig.30 As shown, the width dimension of the portion 25h of the uneven pad portion 25g that is parallel to the top surface 14 of the component body 12 is smaller than the width dimension of the portion 25j that is not parallel to the top surface 14. This can also suppress the increase of internal stress between the wire conductor 23 that is opposite to the first external terminal electrode 26 and the second external terminal electrode 27 where the internal stress is particularly concentrated, and the increase of internal stress in the surface of the component body 12 and the close portion of the wire conductor 23 to which the external impact is directly applied.

[0154] In addition, Fig.29 The inductor 11B and Fig.30 In the inductor 11C shown, the long-side land portions 25 also include uniform land portions having uniform dimensions in the width direction, similarly to the first and second embodiments. However, in the present embodiment, these uniform land portions may not be provided.

[0155] Next, refer to Figure 31-32 , an inductor 11D according to a fourth embodiment of the present invention will be described. Fig.31 In the figure, the line conductors and the long-side via conductors provided between the line conductors 23 and the long-side via conductors 24 located closest to the mounting surface 13 and the line conductors 23 and the long-side via conductors 24 located closest to the top surface 14 are omitted from illustration. Fig.32 is equivalent to Figure 2 Figure. Fig.31 and Fig.32 In, with Figure 1 and Figure 2 Corresponding elements are denoted by the same reference numerals, and duplicate descriptions are omitted.

[0156] exist Fig.31 and Fig.32 In the inductor 11D shown, similarly to the first embodiment, the width dimension of the long side land portion 25 is larger than the width dimension of the wire portion 30. However, in the inductor 11D, the axis of the coil 20D is oriented in a direction orthogonal to the mounting surface 13 and the top surface 14.

[0157] In addition, if Fig.32As shown, if the shortest distance between the surface of the component body 12 and the outer periphery of the wire wiring portion 30 is set to D, the center position of the width direction of the portion of the long side pad portion 25 where the interval D1 with the inner end surface of the first external terminal electrode 26 or the second external terminal electrode 27 or the surface of the component body 12 is equal to or smaller than D is offset from the center position of the width direction of the wire wiring portion 30 to the inner periphery of the spiral track, and the center position of the width direction of the portion of the long side pad portion 25 where the interval D2 with the inner end surface of the first external terminal electrode 26 or the second external terminal electrode 27 or the surface of the component body 12 is larger than D is offset from the center position of the width direction of the wire wiring portion 30 to the outer periphery of the spiral track. As a result, as in the case of the first embodiment, the influence of blocking the magnetic flux passing through the inside of the coil 20D can be reduced, so that the degradation of the Q characteristic can be suppressed and the Q characteristic can be improved. In addition, a higher reliability can be obtained by suppressing the increase of internal stress and a higher Q characteristic can be obtained by minimizing the blocking of the magnetic flux passing through the inside of the coil by the long side pad portion 25.

[0158] The surface of the component body 12 for calculating the shortest distance D is not limited, but in this embodiment, the shortest distance D is usually the distance between the first side surface 15 or the second side surface 16 of the component body 12 and the outer periphery of the wire wiring portion 30 .

[0159] In addition, the interval D1 or D2 between the portion where the long side pad portion 25 exists and the inner end surface of the first external terminal electrode 26 or the second external terminal electrode 27, or the portion where the long side pad portion 25 exists and the surface of the component body 12 means the interval between the outer peripheral edge of the portion and the inner end surface of the first external terminal electrode 26 or the second external terminal electrode 27, or the outer peripheral edge of the portion and the surface of the component body 12.

[0160] In addition, the interval D1 between the portion where the long side pad portion 25 exists and the inner end surface of the first external terminal electrode 26 or the second external terminal electrode 27, or the portion where the long side pad portion 25 exists and the surface of the component body 12 is the same as D, which means that the interval is within the range of D±3% (including the boundary value).

[0161] In addition, the interval D1 or D2 between the portion where the long side pad portion 25 exists and the inner end surface of the first external terminal electrode 26 or the second external terminal electrode 27, or the portion where the long side pad portion 25 exists and the surface of the component body 12 is smaller than D or larger than D, which means that the interval is lower than the range of D±3% or exceeds the range of D±3%, respectively.

[0162] The inductors according to the first to fourth embodiments are manufactured, for example, by the following method.

[0163] <Process for producing mother laminate>

[0164] First, an insulating paste layer is formed by repeatedly applying an insulating paste containing a glass material mainly composed of borosilicate glass, for example, by screen printing, etc. The insulating paste layer formed here later becomes non-conductive material layer 19 that provides first side surface 15 of component body 12 .

[0165] Next, for example, a photosensitive conductive paste layer is formed on the insulating paste layer by applying a photosensitive conductive paste having Ag or the like as a main metal component by screen printing or the like. Furthermore, after irradiating the photosensitive conductive paste layer with ultraviolet rays or the like through a photomask, it is developed using an alkaline solution or the like, thereby forming a wire conductor layer, an external conductor layer, and a lead conductor layer connected to the wire conductor layer and the external conductor layer on the insulating paste layer. As described above, a wire conductor layer, a lead conductor layer, and an external conductor layer are formed at multiple locations by photolithography. The wire conductor layer formed here will later become the wire conductor 23 located closest to the first side surface 15. The lead conductor layer formed here will later become the first lead conductor 28. The external conductor layer formed here will later become a part of each of the first lead conductor 28 and the second lead conductor 29.

[0166] When forming the wire conductor layer, for example, by using a pattern (for example, Figure 3 to Figure 25 By using a photomask having a pattern of a wire conductor as shown in FIG. 1 , the pattern of the wire conductor of the inductor of the present invention can be realized in the inductor obtained later.

[0167] In addition, when forming the line conductor layer, the lead conductor layer, and the external conductor layer, instead of exposure using a photomask, for example, DI exposure (also called direct imaging exposure or direct writing) without using a photomask may be performed.

[0168] Next, for example, by applying a photosensitive insulating paste by screen printing or the like, a new insulating paste layer is formed on the already formed insulating paste layer. Furthermore, after the newly formed insulating paste layer is irradiated with ultraviolet rays or the like through a photomask, it is developed using an alkaline solution or the like, thereby forming via holes and openings in the insulating paste layer. As described above, an insulating paste layer having via holes and openings provided at multiple locations is formed by photolithography. The insulating paste layer formed here includes an insulating paste layer that will later become a non-conductive material layer 19 (however, in addition to the non-conductive material layer 19 providing the first side 15 of the component body 12 and the non-conductive material layer 19 providing the second side 16 of the component body 12). The via hole formed here overlaps with a portion of the already formed wire conductor layer. The opening formed here overlaps with the already formed external conductor layer.

[0169] Furthermore, when forming an insulating paste layer having via holes and openings, instead of exposure using a photomask, for example, DI exposure without using a photomask may be performed.

[0170] Next, for example, by applying a photosensitive conductive paste with Ag or the like as a main metal component by screen printing or the like, a new photosensitive conductive paste layer is formed inside the via hole and the opening, and is formed on the already formed insulating paste layer. Furthermore, after irradiating the photosensitive conductive paste layer with ultraviolet rays or the like through a photomask, it is developed using an alkaline solution or the like, thereby forming a via conductor layer inside the via hole, and forming a new wire conductor layer connected to the via conductor layer on the insulating paste layer, and further forming a new external conductor layer connected to the already formed external conductor layer inside the opening, and further forming a new external conductor layer on the external conductor layer. As described above, the wire conductor layer, the via conductor layer, and the external conductor layer are formed by photolithography. The via conductor layer formed here later becomes a via conductor that connects the adjacent wire conductors in the axial direction of the coil.

[0171] In addition, when forming the line conductor layer, the via conductor layer, and the outer conductor layer, instead of exposure using a photomask, for example, DI exposure without using a photomask may be performed.

[0172] Then, by repeating the above steps, the insulating paste layer, the wire conductor layer, the via conductor layer, and the external conductor layer are formed into a predetermined laminated structure. For example, the wire conductor layer formed here includes a wire conductor layer that will later become the wire conductor 23 located closest to the second side surface 16 .

[0173] Furthermore, when a line conductor layer that will later become the line conductor 23 located closest to the second side surface 16 and an external conductor layer on the same layer as the line conductor layer are formed, a lead conductor layer connected to the line conductor layer and the external conductor layer is also formed. The lead conductor layer formed here will later become the second lead conductor 29.

[0174] Finally, a new insulating paste layer is formed by repeatedly applying an insulating paste containing a glass material mainly composed of borosilicate glass, for example, by screen printing, etc. The insulating paste layer formed here is a non-conductive material layer 19 that will later provide the second side surface 16 of the component body 12.

[0175] According to the above, a mother laminated body is produced.

[0176] The method for forming the conductor patterns of the line conductor layer, the lead conductor layer, the conducting conductor layer and the external conductor layer is not limited to the above-mentioned photolithography method. For example, it may also be a method of printing a laminated conductive paste using a screen printing plate having openings provided in the shape of the conductor pattern, or a method of etching the conductor film to form the shape of the conductor pattern after forming the conductor film by sputtering, evaporation, foil crimping, etc., or a method of forming a negative pattern by a semi-additive method after forming a plating film, and then removing useless portions of the plating film by etching to form the shape of the conductor pattern.

[0177] When forming conductor patterns of the line conductor layer, the lead conductor layer, the via conductor layer, and the external conductor layer, a high aspect ratio is achieved by forming a multi-level conductor pattern, thereby reducing the loss caused by resistance at high frequencies. The method of forming the multi-level conductor pattern is not particularly limited, and for example, it may be a method of repeatedly overlapping conductor patterns by repeatedly using a photolithography process as described above, a method of repeatedly overlapping conductor patterns formed by a semi-additive method, a method of overlapping conductor patterns formed by a semi-additive method and a conductor pattern formed by etching a plated film grown by plating in different orders, or a method of further growing a plated film formed by a semi-additive method by plating.

[0178] The conductive material of the conductor patterns constituting the line conductor layer, the lead conductor layer, the conduction conductor layer and the external conductor layer is not limited to the photosensitive conductive paste having the above-mentioned Ag as the main metal component. For example, it can also be a conductor containing metals such as Ag, Au, Cu, etc. formed by sputtering, evaporation, foil crimping, plating, etc.

[0179] The method of forming the insulating paste layer is not limited to the above-mentioned photolithography method, and may be, for example, a method of crimping a sheet made of an insulating material, a method of spin coating the insulating material, or a method of spray coating the insulating material.

[0180] The method of forming an insulating paste layer having conductive holes and openings is not limited to the above-mentioned photolithography method. For example, it can also be a method of forming an insulating film by crimping a sheet made of insulating material, spin coating insulating material, spraying insulating material, etc., and then performing laser processing, drilling processing, etc. on the insulating film to provide conductive holes and openings.

[0181] The insulating material constituting the insulating paste layer is not limited to the glass material with the above-mentioned borosilicate glass as the main component, and can be, for example, ceramic material, organic material such as epoxy resin, fluororesin, polymer resin, composite material such as glass epoxy resin, etc. As the insulating material, a material with a small dielectric constant and dielectric loss is particularly preferred.

[0182] <Steps of forming a base body, a coil, and external terminal electrodes>

[0183] First, the mother laminate is cut by dicing or the like to be individualized into a plurality of unfired laminates.

[0184] The unfired laminated body includes an insulating paste laminated portion in which insulating paste layers are laminated, a line conductor laminated portion in which line conductor layers are laminated so that adjacent line conductor layers are electrically connected via a via conductor layer, and an external conductor laminated portion in which external conductor layers are laminated.

[0185] When the unfired laminate is separated into individual pieces, the outer conductor laminate is exposed at two locations on at least the bottom surface of the insulating paste laminate included in the cut surface of the unfired laminate.

[0186] Next, the unfired laminated body is fired to produce a laminated body.

[0187] If the unfired laminate is fired, the insulating paste layer becomes a non-conductive material layer as an insulating layer, and the insulating paste laminated portion becomes the component body 12 (green body). In addition, if the unfired laminate is fired, the wire conductor layer becomes a wire conductor, and the wire conductor laminated portion becomes a coil. Furthermore, if the unfired laminate is fired, one of the two external conductor laminated portions becomes a part of the first external terminal electrode 26, and the other becomes a part of the second external terminal electrode 27.

[0188] Next, the obtained laminated body may be subjected to, for example, barrel grinding to round off the corners and ridges of the component body 12 .

[0189] Finally, the two fired outer conductor laminated parts are used as base electrodes, and Ni-plated electrodes and Sn-plated electrodes are formed on the surfaces of the base electrodes in sequence by plating. The thickness of the Ni-plated electrodes and the Sn-plated electrodes is, for example, 2 μm or more and 10 μm or less.

[0190] In this way, the first external terminal electrode 26 and the second external terminal electrode 27 including the base electrode, the Ni-plated electrode, and the Sn-plated electrode in this order from the surface side of the body 10 are formed.

[0191] The method for forming the external terminal electrode is not limited to the method of plating the external conductor laminate portion exposed on the cut surface of the unfired laminate (at least the bottom surface of the insulating paste laminate portion) as described above. For example, it can also be a method of exposing the external conductor laminate portion on the cut surface of the unfired laminate (at least the bottom surface of the insulating paste laminate portion) as described above, immersing (immersing) the exposed portion of the external conductor laminate portion in a conductive paste, or forming a film of the conductive paste on the exposed portion of the external conductor laminate portion by sputtering, and then plating the electrode.

[0192] Based on the above, the inductors according to the first to fourth embodiments are manufactured.

[0193] The inductors of the first to fourth embodiments are manufactured in, for example, 0402 (0.4 mm×0.2 mm×0.2 mm) size. The size of the inductors of the first to fourth embodiments is not limited to 0402 (0.4 mm×0.2 mm×0.2 mm) size.

[0194] As described above, as a mold used when forming a wire conductor layer (later wire conductor), for example, a photomask (for example, when performing exposure by photolithography), a design drawing (for example, when performing DI exposure), etc. are considered. In the pattern of the wire conductor of the inductor of the present invention (for example, Figure 3 to Figure 25 When the pattern of the wire conductor shown in the figure is drawn into these molds, the pattern of the wire conductor of the inductor of the present invention can be realized. Therefore, the mold (for example, a photomask, a design drawing, etc.) that draws the pattern of the wire conductor of the inductor of the present invention is also one of the present invention.

[0195] The following contents are disclosed in this specification.

[0196] <1> An inductor comprising:

[0197] A component body having a laminated structure formed by laminating a plurality of non-conductive material layers; and

[0198] The coil is arranged inside the component body and is composed of a plurality of wire conductors and a plurality of conducting conductors, wherein the plurality of wire conductors extend respectively along the interfaces between the non-conductive material layers, the plurality of conducting conductors penetrate the non-conductive material layers in the thickness direction, the wire conductors have a pad portion connected to the conducting conductors and a wire wiring portion connected to the pad portion, and the wire conductors and the conducting conductors are alternately connected to form a shape extending along a spiral track.

[0199] The via conductor includes a long-side via conductor, the long-side via conductor extends along the line conductor and has a long-side shape.

[0200] The pad portion includes a long side pad portion, and the long side pad portion is connected to the long side conducting conductor.

[0201] The width dimension of the long side pad portion is greater than the width dimension of the wire wiring portion.

[0202] When viewed from above in the axial direction of the coil, the center position of the long-side land portion in the width direction is offset from the center position of the wire wiring portion in the width direction toward at least one of the inner circumference and the outer circumference of the spiral track.

[0203] <2> The inductor according to <1>, wherein:

[0204] It also includes an external terminal electrode, which is provided to be exposed from the outer surface of the component body and connected to one end of the coil.

[0205] When viewed from above along the axial direction of the coil, the center position in the width direction of at least a portion of the long side pad portion that is most adjacent to the external terminal electrode is offset from the center position in the width direction of the wire wiring portion toward the inner circumference of the spiral track.

[0206] <3> The inductor according to <1> or <2>, wherein:

[0207] When viewed in the axial direction of the coil, the center position in the width direction of at least a portion of the long-side pad portion that is most adjacent to the surface of the component body is offset from the center position in the width direction of the wire wiring portion toward the inner circumference of the spiral track.

[0208] <4> The inductor according to any one of <1> to <3>, wherein:

[0209] When viewed from above in the axial direction of the coil, the long side land portion includes a plurality of long side land portions that are offset from a center position in a width direction of the wire wiring portion in different directions.

[0210] <5> The inductor according to any one of <1> to <4>, wherein

[0211] When viewed from above in the axial direction of the coil, the long side land portion includes a long side land portion whose direction of deviation from a center position in the width direction of the wire conductor portion is different depending on the position in the extending direction of the wire conductor.

[0212] <6> The inductor according to any one of <1> to <5>, wherein:

[0213] It also includes an external terminal electrode, which is provided to be exposed from the outer surface of the component body and connected to one end of the coil.

[0214] If the shortest distance between the corner of the external terminal electrode facing the wire wiring portion and the outer peripheral edge of the wire wiring portion when viewed from above along the axial direction of the coil is d,

[0215] The wiring portion has a first region and a second region, wherein the first region is a region whose interval with the inner end surface of the external terminal electrode or the surface of the component body is the same as or smaller than d, and the second region is a region whose interval with the inner end surface of the external terminal electrode or the surface of the component body is larger than d.

[0216] When viewed in perspective along the axial direction of the coil, the center position in the width direction of the portion of the long side pad portion overlapping the first region is offset from the center position in the width direction of the first region toward the inner circumference of the spiral track.

[0217] When viewed from above in the axial direction of the coil, a center position in the width direction of a portion of the long-side land portion overlapping the second region is offset from a center position in the width direction of the second region toward an outer peripheral side of the spiral track.

[0218] <7> The inductor according to <6>, wherein:

[0219] d is 10 μm or more.

[0220] <8> The inductor according to any one of <1> to <7>, wherein

[0221] The long side pad portion includes a first portion and a second portion, wherein the first portion is a portion whose center position in the width direction is offset from the center position in the width direction of the wire wiring portion toward the inner peripheral side of the spiral track, and the second portion is a portion whose center position in the width direction is offset from the center position in the width direction of the wire wiring portion toward the outer peripheral side of the spiral track,

[0222] When viewed in perspective along the axial direction of the coil, the distance between the area of ​​the wire wiring portion overlapping with the first part and the inner end surface of the external terminal electrode or the surface of the component body is smaller than the distance between the area of ​​the wire wiring portion overlapping with the second part and the inner end surface of the external terminal electrode or the surface of the component body.

[0223] <9> The inductor according to any one of <1> to <5>, wherein:

[0224] The component body is in a rectangular parallelepiped shape, and has a mounting surface, a top surface, a first side surface, a second side surface, and a first end surface and a second end surface, wherein the top surface is opposite to the mounting surface, the first side surface and the second side surface connect the mounting surface and the top surface and are opposite to each other, and the first end surface and the second end surface respectively connect the mounting surface and the top surface and the first side surface and the second side surface and are opposite to each other,

[0225] The coil has a curved portion and a straight portion, wherein the curved portion faces the first end surface or the second end surface of the component body, and the straight portion faces the top surface.

[0226] The center position in the width direction of at least a portion of the long side pad portion that is parallel to and opposite to the top surface is offset from the center position in the width direction of the wire wiring portion toward the inner circumference of the spiral track.

[0227] A center position in the width direction of at least a portion of the long-side pad portion that is not parallel to and faces the top surface is offset from a center position in the width direction of the wire wiring portion toward an outer peripheral side of the spiral track.

[0228] <10> An inductor comprising:

[0229] A component body having a laminated structure formed by laminating a plurality of non-conductive material layers; and

[0230] The coil is arranged inside the component body and is composed of a plurality of wire conductors and a plurality of conducting conductors, wherein the plurality of wire conductors extend respectively along the interfaces between the non-conductive material layers, the plurality of conducting conductors penetrate the non-conductive material layers in the thickness direction, the wire conductors have a pad portion connected to the conducting conductors and a wire wiring portion connected to the pad portion, and the wire conductors and the conducting conductors are alternately connected to form a shape extending along a spiral track.

[0231] The via conductor includes a long-side via conductor, the long-side via conductor extends along the line conductor and has a long-side shape.

[0232] The pad portion includes a long side pad portion, and the long side pad portion is connected to the long side conducting conductor.

[0233] The long side pad portion includes an uneven pad portion having uneven dimensions in the width direction.

[0234] The maximum value of the width direction dimension of the uneven pad portion is greater than the width direction dimension of the wire wiring portion.

[0235] The minimum value of the width direction dimension of the uneven pad portion is the same as the width direction dimension of the wire portion, or the minimum value of the width direction dimension of the uneven pad portion is greater than the width direction dimension of the wire portion.

[0236] A center position in the width direction of a portion of the uneven pad portion having a width dimension greater than a width dimension of the wire portion is offset from the center position in the width direction of the wire portion toward an outer peripheral side of the spiral track.

[0237] <11> The inductor according to <10>, wherein:

[0238] It also includes an external terminal electrode, which is provided to be exposed from the outer surface of the component body and connected to one end of the coil.

[0239] If the shortest distance between the corner of the external terminal electrode facing the wire wiring portion and the outer peripheral edge of the wire wiring portion when viewed from above along the axial direction of the coil is d,

[0240] Then the uneven pad portion has a first portion and a second portion,

[0241] The first portion is a portion whose distance from the inner end surface of the external terminal electrode or the surface of the component body is equal to or smaller than d.

[0242] The second portion is a portion that is spaced apart from the inner end surface of the external terminal electrode or the surface of the component body by a distance greater than d.

[0243] The width dimension of the first portion is smaller than the width dimension of the second portion.

[0244] <12> The inductor according to <10>, wherein:

[0245] The component body is in a rectangular parallelepiped shape, and has a mounting surface, a top surface, a first side surface, a second side surface, and a first end surface and a second end surface, wherein the top surface is opposite to the mounting surface, the first side surface and the second side surface connect the mounting surface and the top surface and are opposite to each other, and the first end surface and the second end surface respectively connect the mounting surface and the top surface and the first side surface and the second side surface and are opposite to each other,

[0246] The coil has a curved portion and a straight portion, wherein the curved portion faces the first end surface or the second end surface of the component body, and the straight portion faces the top surface.

[0247] A portion of the uneven land portion that faces the top surface in parallel has a smaller width dimension than a portion that faces the top surface in parallel.

[0248] <13> An inductor comprising:

[0249] The component body has a laminated structure formed by laminating a plurality of non-conductive material layers;

[0250] a coil, arranged inside the component body, and composed of a plurality of wire conductors and a plurality of conducting conductors, wherein the plurality of wire conductors extend respectively along interfaces between the non-conductive material layers, the plurality of conducting conductors penetrate the non-conductive material layers in a thickness direction, the wire conductors have pad portions connected to the conducting conductors and wire wiring portions connected to the pad portions, and the wire conductors and the conducting conductors are alternately connected to form a shape extending along a spiral track; and

[0251] The external terminal electrode is provided to be exposed from the outer surface of the component body and connected to one end of the coil.

[0252] The via conductor includes a long-side via conductor, the long-side via conductor extends along the line conductor and has a long-side shape.

[0253] The pad portion includes a long side pad portion, and the long side pad portion is connected to the long side conducting conductor.

[0254] The component body is in a rectangular parallelepiped shape, and has a mounting surface, a top surface, a first side surface, a second side surface, and a first end surface and a second end surface, wherein the top surface is opposite to the mounting surface, the first side surface and the second side surface connect the mounting surface and the top surface and are opposite to each other, and the first end surface and the second end surface respectively connect the mounting surface and the top surface and the first side surface and the second side surface and are opposite to each other,

[0255] The axis of the coil is oriented in a direction perpendicular to the mounting surface.

[0256] The width dimension of the long side pad portion is greater than the width dimension of the wire wiring portion.

[0257] If the shortest distance between the surface of the component body and the outer periphery of the wire wiring portion is set to D,

[0258] Then, the center position in the width direction of the portion of the long side pad portion whose spacing from the inner end surface of the external terminal electrode or the surface of the component body is equal to or smaller than D is offset from the center position in the width direction of the wiring portion toward the inner circumference of the spiral track.

[0259] The center position in the width direction of the portion of the long side pad portion whose distance from the inner end surface of the external terminal electrode or the surface of the component body is greater than D is offset from the center position in the width direction of the wire wiring portion toward the outer peripheral side of the spiral track.

[0260] <14> An inductor comprising:

[0261] A component body having a laminated structure formed by laminating a plurality of non-conductive material layers; and

[0262] The coil is arranged inside the component body and is composed of a plurality of wire conductors and a plurality of conducting conductors, wherein the plurality of wire conductors extend respectively along the interfaces between the non-conductive material layers, the plurality of conducting conductors penetrate the non-conductive material layers in the thickness direction, the wire conductors have a pad portion connected to the conducting conductors and a wire wiring portion connected to the pad portion, and the wire conductors and the conducting conductors are alternately connected to form a shape extending along a spiral track.

[0263] The via conductor includes a long-side via conductor, the long-side via conductor extends along the line conductor and has a long-side shape.

[0264] The pad portion includes a long side pad portion, and the long side pad portion is connected to the long side conducting conductor.

[0265] The width dimension of the long side pad portion is greater than the width dimension of the wire wiring portion.

[0266] The line wiring portion includes a line-symmetric line wiring portion, and the line-symmetric line wiring portion has a line-symmetric shape.

[0267] The long side pad portion connected to the line-symmetrical line wiring portion includes a third portion and a fourth portion, and the third portion and the fourth portion are sequentially arranged in the extending direction of the line conductor.

[0268] When the portion of the line-symmetric wiring portion folded back along the axis of symmetry toward the third portion and the fourth portion is taken as the imaginary line wiring portion,

[0269] The inner periphery of the third portion is located on the inner periphery of the imaginary line wiring portion.

[0270] The outer periphery of the third portion extends from the outer periphery of the imaginary line wiring portion.

[0271] The inner periphery of the fourth portion extends from the inner periphery of the imaginary line wiring portion.

[0272] The outer periphery of the fourth portion is located on the outer periphery of the imaginary line wiring portion.

[0273] <15> The inductor according to any one of <1> to <14>, wherein

[0274] A width dimension of the long-side via conductor is larger than a width dimension of the wire wiring portion.

[0275] <16> The inductor according to any one of <1> to <14>, wherein

[0276] The width dimension of the long side via conductor is smaller than the width dimension of the wire portion.

[0277] When viewed through along the axial direction of the coil, the long-side conducting conductor does not protrude from the spiral track.

Claims

1. An inductor comprising: A component body having a laminated structure formed by laminating a plurality of non-conductive material layers; and The coil is arranged inside the component body and is composed of a plurality of wire conductors and a plurality of conducting conductors, wherein: The plurality of wire conductors extend along interfaces between the non-conductive material layers, the plurality of via conductors penetrate the non-conductive material layers in the thickness direction, the wire conductors have pad portions connected to the via conductors and wire wiring portions connected to the pad portions, and the wire conductors and the via conductors are alternately connected to form a shape extending along a spiral track. The via conductor includes a long-side via conductor, the long-side via conductor extends along the line conductor and has a long-side shape. The pad portion includes a long side pad portion, and the long side pad portion is connected to the long side conducting conductor. The width dimension of the long side pad portion is greater than the width dimension of the wire wiring portion. When viewed from above in the axial direction of the coil, the center position of the long-side land portion in the width direction is offset from the center position of the wire wiring portion in the width direction toward at least one of the inner circumference and the outer circumference of the spiral track.

2. The inductor according to claim 1, wherein It also includes an external terminal electrode, which is provided to be exposed from the outer surface of the component body and connected to one end of the coil. When viewed from above along the axial direction of the coil, the center position in the width direction of at least a portion of the long side pad portion that is most adjacent to the external terminal electrode is offset from the center position in the width direction of the wire wiring portion toward the inner circumference of the spiral track.

3. The inductor according to claim 1 or 2, wherein: When viewed in the axial direction of the coil, the center position in the width direction of at least a portion of the long-side pad portion that is most adjacent to the surface of the component body is offset from the center position in the width direction of the wire wiring portion toward the inner circumference of the spiral track.

4. The inductor according to any one of claims 1 to 3, wherein: When viewed from above in the axial direction of the coil, the long side land portion includes a plurality of long side land portions that are offset from a center position in a width direction of the wire wiring portion in different directions.

5. The inductor according to any one of claims 1 to 4, wherein: When viewed from above in the axial direction of the coil, the long side land portion includes a long side land portion whose direction of deviation from a center position in the width direction of the wire conductor portion is different depending on the position in the extending direction of the wire conductor.

6. The inductor according to any one of claims 1 to 5, wherein: It also includes an external terminal electrode, which is provided to be exposed from the outer surface of the component body and connected to one end of the coil. If the shortest distance between the corner of the external terminal electrode facing the wire wiring portion and the outer peripheral edge of the wire wiring portion when viewed from above along the axial direction of the coil is d, The wiring portion has a first region and a second region, wherein the first region is a region whose interval with the inner end surface of the external terminal electrode or the surface of the component body is the same as or smaller than d, and the second region is a region whose interval with the inner end surface of the external terminal electrode or the surface of the component body is larger than d. When viewed in perspective along the axial direction of the coil, the center position in the width direction of the portion of the long side pad portion overlapping the first region is offset from the center position in the width direction of the first region toward the inner circumference of the spiral track. When viewed from above in the axial direction of the coil, a center position in the width direction of a portion of the long-side land portion overlapping the second region is offset from a center position in the width direction of the second region toward an outer peripheral side of the spiral track.

7. The inductor according to claim 6, wherein: d is 10 μm or more.

8. The inductor according to any one of claims 1 to 7, wherein: The long side pad portion includes a first portion and a second portion, wherein the first portion is a portion whose center position in the width direction is offset from the center position in the width direction of the wire wiring portion toward the inner peripheral side of the spiral track, and the second portion is a portion whose center position in the width direction is offset from the center position in the width direction of the wire wiring portion toward the outer peripheral side of the spiral track, When viewed in perspective along the axial direction of the coil, the distance between the area of ​​the wire wiring portion overlapping with the first part and the inner end surface of the external terminal electrode or the surface of the component body is smaller than the distance between the area of ​​the wire wiring portion overlapping with the second part and the inner end surface of the external terminal electrode or the surface of the component body.

9. The inductor according to any one of claims 1 to 5, wherein: The component body is in a rectangular parallelepiped shape, and has a mounting surface, a top surface, a first side surface, a second side surface, and a first end surface and a second end surface, wherein the top surface is opposite to the mounting surface, the first side surface and the second side surface connect the mounting surface and the top surface and are opposite to each other, and the first end surface and the second end surface respectively connect the mounting surface and the top surface and the first side surface and the second side surface and are opposite to each other, The coil has a curved portion and a straight portion, wherein the curved portion faces the first end surface or the second end surface of the component body, and the straight portion faces the top surface. The center position in the width direction of at least a portion of the long side pad portion that is parallel to and opposite to the top surface is offset from the center position in the width direction of the wire wiring portion toward the inner circumference of the spiral track. A center position in the width direction of at least a portion of the long-side pad portion that is not parallel to and faces the top surface is offset from a center position in the width direction of the wire wiring portion toward an outer peripheral side of the spiral track.

10. An inductor comprising: A component body having a laminated structure formed by laminating a plurality of non-conductive material layers; and The coil is arranged inside the component body and is composed of a plurality of wire conductors and a plurality of conducting conductors, wherein: The plurality of wire conductors extend along interfaces between the non-conductive material layers, the plurality of via conductors penetrate the non-conductive material layers in the thickness direction, the wire conductors have pad portions connected to the via conductors and wire wiring portions connected to the pad portions, and the wire conductors and the via conductors are alternately connected to form a shape extending along a spiral track. The via conductor includes a long-side via conductor, the long-side via conductor extends along the line conductor and has a long-side shape. The pad portion includes a long side pad portion, and the long side pad portion is connected to the long side conducting conductor. The long side pad portion includes an uneven pad portion having uneven dimensions in the width direction. The maximum value of the width direction dimension of the uneven pad portion is greater than the width direction dimension of the wire wiring portion. The minimum value of the width direction dimension of the uneven pad portion is the same as the width direction dimension of the wire portion, or the minimum value of the width direction dimension of the uneven pad portion is greater than the width direction dimension of the wire portion. A center position in the width direction of a portion of the uneven pad portion having a width dimension greater than a width dimension of the wire portion is offset from the center position in the width direction of the wire portion toward an outer peripheral side of the spiral track.

11. The inductor according to claim 10, wherein It also includes an external terminal electrode, which is provided to be exposed from the outer surface of the component body and connected to one end of the coil. If the shortest distance between the corner of the external terminal electrode facing the wire wiring portion and the outer peripheral edge of the wire wiring portion when viewed from above along the axial direction of the coil is d, Then the uneven pad portion has a first portion and a second portion, The first portion is a portion whose distance from the inner end surface of the external terminal electrode or the surface of the component body is equal to or smaller than d. The second portion is a portion that is spaced apart from the inner end surface of the external terminal electrode or the surface of the component body by a distance greater than d. The width dimension of the first portion is smaller than the width dimension of the second portion.

12. The inductor according to claim 10, wherein: The component body is in a rectangular parallelepiped shape, and has a mounting surface, a top surface, a first side surface, a second side surface, and a first end surface and a second end surface, wherein the top surface is opposite to the mounting surface, the first side surface and the second side surface connect the mounting surface and the top surface and are opposite to each other, and the first end surface and the second end surface respectively connect the mounting surface and the top surface and the first side surface and the second side surface and are opposite to each other, The coil has a curved portion and a straight portion, wherein the curved portion faces the first end surface or the second end surface of the component body, and the straight portion faces the top surface. A portion of the uneven land portion that faces the top surface in parallel has a smaller width dimension than a portion that faces the top surface in parallel.

13. An inductor comprising: The component body has a laminated structure formed by laminating a plurality of non-conductive material layers; The coil is arranged inside the component body and is composed of a plurality of wire conductors and a plurality of conducting conductors, wherein: The plurality of wire conductors extend along interfaces between the non-conductive material layers, the plurality of via conductors penetrate the non-conductive material layers in a thickness direction, the wire conductors have pad portions connected to the via conductors and wire wiring portions connected to the pad portions, and the wire conductors and the via conductors are alternately connected to form a shape extending along a spiral track; and The external terminal electrode is provided to be exposed from the outer surface of the component body and connected to one end of the coil. The via conductor includes a long-side via conductor, the long-side via conductor extends along the line conductor and has a long-side shape. The pad portion includes a long side pad portion, and the long side pad portion is connected to the long side conducting conductor. The component body is in a rectangular parallelepiped shape, and has a mounting surface, a top surface, a first side surface, a second side surface, and a first end surface and a second end surface, wherein the top surface is opposite to the mounting surface, the first side surface and the second side surface connect the mounting surface and the top surface and are opposite to each other, and the first end surface and the second end surface respectively connect the mounting surface and the top surface and the first side surface and the second side surface and are opposite to each other, The axis of the coil is oriented in a direction perpendicular to the mounting surface. The width dimension of the long side pad portion is greater than the width dimension of the wire wiring portion. If the shortest distance between the surface of the component body and the outer periphery of the wire wiring portion is set to D, Then, the center position in the width direction of the portion of the long side pad portion whose spacing from the inner end surface of the external terminal electrode or the surface of the component body is equal to or smaller than D is offset from the center position in the width direction of the wiring portion toward the inner circumference of the spiral track. The center position in the width direction of the portion of the long side pad portion whose distance from the inner end surface of the external terminal electrode or the surface of the component body is greater than D is offset from the center position in the width direction of the wire wiring portion toward the outer peripheral side of the spiral track.

14. An inductor comprising: A component body having a laminated structure formed by laminating a plurality of non-conductive material layers; and The coil is arranged inside the component body and is composed of a plurality of wire conductors and a plurality of conducting conductors, wherein: The plurality of wire conductors extend along interfaces between the non-conductive material layers, the plurality of via conductors penetrate the non-conductive material layers in the thickness direction, the wire conductors have pad portions connected to the via conductors and wire wiring portions connected to the pad portions, and the wire conductors and the via conductors are alternately connected to form a shape extending along a spiral track. The via conductor includes a long-side via conductor, the long-side via conductor extends along the line conductor and has a long-side shape. The pad portion includes a long side pad portion, and the long side pad portion is connected to the long side conducting conductor. The width dimension of the long side pad portion is greater than the width dimension of the wire wiring portion. The line wiring portion includes a line-symmetric line wiring portion, and the line-symmetric line wiring portion has a line-symmetric shape. The long side pad portion connected to the line-symmetrical line wiring portion includes a third portion and a fourth portion, and the third portion and the fourth portion are sequentially arranged in the extending direction of the line conductor. When the portion of the line-symmetric wiring portion folded back along the axis of symmetry toward the third portion and the fourth portion is taken as the imaginary line wiring portion, The inner periphery of the third portion is located on the inner periphery of the imaginary line wiring portion. The outer periphery of the third portion extends from the outer periphery of the imaginary line wiring portion. The inner periphery of the fourth portion extends from the inner periphery of the imaginary line wiring portion. The outer periphery of the fourth portion is located on the outer periphery of the imaginary line wiring portion.

15. The inductor according to any one of claims 1 to 14, wherein: A width dimension of the long-side via conductor is larger than a width dimension of the wire wiring portion.

16. The inductor according to any one of claims 1 to 14, wherein: The width dimension of the long side via conductor is smaller than the width dimension of the wire portion. When viewed through along the axial direction of the coil, the long-side conducting conductor does not protrude from the spiral track.

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