Inductor

Abstract

To provide an inductor that can improve Q characteristics.SOLUTION: An inductor 11 comprises a component main body 12 having a laminate structure in which a plurality of non-conductive material layers 19 is laminated, where a plurality of line conductors 23 and a plurality of via conductors 24 are provided inside the component main body 12. The line conductor 23 has a spiral coil 20 which has pad parts 25 that are connected to the via conductors 24 and a line arrangement part 30 that is connected to the pad parts 25, which is alternately connected with the line conductor 23 and the via conductor 24. The via conductor 24 includes a longitudinal via conductor 24 in a longitudinal shape extending along the line conductor 23. The pad part 25 includes a longitudinal pad part 25 connected to the longitudinal via conductor 24, where the dimension in a width direction of the pad part is larger than the dimension in the width direction of the line arrangement part 30. When seen through in an axial direction of the coli 20, the center position in the width direction of the longitudinal pad part 25 is shifted from the center position in the width direction of the line arrangement part 30 toward at least either of an inner periphery side and an outer periphery side of a spiral trajectory.SELECTED DRAWING: Figure 2

Description

[Technical field]

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

[0002] In order to improve the Q value (Q characteristic), which is an index of the characteristics of an inductor, it is necessary to avoid blocking the magnetic flux generated inside the coil that extends along a spiral track formed by alternately connecting line conductors and via conductors (including longitudinal via conductors).For example, Patent Document 1 discloses a structure in which the longitudinal via conductors are shifted not only to the inner side of the spiral track but also to the outer side in order to reduce the degree to which the longitudinal via conductors protrude (see FIG. 13). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2023-47357 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, even if the longitudinal via conductor is shifted in this way, it is becoming difficult to obtain a sufficient improvement in the Q value. This tendency has become more pronounced, particularly with the recent demand for low-profile and small-sized inductors. This is because the longitudinal via conductor has a long length in the longitudinal direction, and since the via conductor is a conductor that connects in the lamination direction, it is difficult to suppress the thickness in the lamination direction. In addition, from the viewpoint of suppressing short circuits between line conductors, it is preferable that the thickness in the lamination direction is large. Therefore, if the longitudinal via conductor is shifted to the inner side of the spiral track, the effect of shielding the magnetic flux passing through the inside of the coil is large, and there is a possibility that the deterioration of the Q characteristic cannot be suppressed.

[0005] The present invention has been made to solve the above problems, and has an object to provide an inductor capable of improving the Q characteristic. [Means for solving the problem]

[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 stacked; and a coil disposed inside the component body, the coil being composed of a plurality of line conductors each extending along an interface between the non-conductive material layers and a plurality of via conductors penetrating the non-conductive material layers in a thickness direction, the line conductors having pad portions connected to the via conductors and line wiring portions connected to the pad portions, the line conductors and the via conductors being alternately connected to each other to form a configuration extending along a spiral trajectory, the via conductors including elongated via conductors having an elongated shape extending along the line conductors, the pad portions including elongated pad portions connected to the elongated via conductors, a width dimension of the elongated pad portions being larger than a width dimension of the line wiring portions, and when viewed in the axial direction of the coil, a center position in the width direction of the elongated pad portions is shifted from a center position in the width direction of the line wiring portions to at least one of the inner and outer circumferential sides of the spiral trajectory.

[0007] In a second aspect, an 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 disposed inside the component body, the coil being composed of a plurality of line conductors each extending along an interface between the non-conductive material layers and a plurality of via conductors penetrating the non-conductive material layers in a thickness direction, the line conductors having pad portions connected to the via conductors and line wiring portions connected to the pad portions, the line conductors and the via conductors being alternately connected to each other to form a coil extending along a spiral trajectory, the via conductors being connected to the line conductors and the via conductors being alternately connected to each other, the pad portion includes a longitudinal via conductor having a longitudinal shape extending along the longitudinal conductor, the pad portion includes a longitudinal pad portion connected to the longitudinal via conductor, the longitudinal pad portion includes a non-uniform pad portion having a non-uniform width dimension, the maximum value of the width dimension of the non-uniform pad portion is larger than the width dimension of the line wiring portion, the minimum value of the width dimension of the non-uniform pad portion is the same as or larger than the width dimension of the line wiring portion, and the width center position of a portion of the non-uniform pad portion whose width dimension is larger than the width dimension of the line wiring portion is shifted toward the outer periphery of the spiral track from the width center position of the line wiring portion.

[0008] In a third aspect, an inductor of the present invention comprises: a component body having a laminated structure formed by stacking a plurality of non-conductive material layers; and a coil disposed inside the component body, the coil being composed of a plurality of line conductors each extending along an interface between the non-conductive material layers and a plurality of via conductors penetrating the non-conductive material layers in a thickness direction, the line conductors having pad portions connected to the via conductors and line wiring portions connected to the pad portions, the line conductors and the via conductors being alternately connected to each other to form a shape extending along a spiral trajectory; and an external terminal electrode provided so as to be exposed from an outer surface of the component body and connected to either end of the coil, the via conductors including elongated via conductors having an elongated shape extending along the line conductors, the pad portions including elongated pad portions connected to the elongated via conductors, the component body being shaped like a rectangular parallelepiped, the component body having a mounting surface and a top surface facing the mounting surface, the coil has a first side and a second side which connect the mounting surface and the top surface and which face each other, and a first end face and a second end face which connect the mounting surface and the top surface, and the first side and the second side surface, respectively, and which face each other, the axis of the coil is oriented in a direction perpendicular to the mounting surface, the width dimension of the long pad portion is greater than the width dimension of the line wiring portion, and if the shortest distance between the surface of the component body and the outer circumferential edge of the line wiring portion is D, the widthwise center position of a portion of the long pad portion which has a distance between the inner end face of the external terminal electrode or the surface of the component body which is the same as or smaller than D is shifted from the widthwise center position of the line wiring portion to the inner circumferential side of the spiral orbit, and the widthwise center position of a portion of the long pad portion which has a distance between the inner end face of the external terminal electrode or the surface of the component body which is greater than D is shifted from the widthwise center position of the line wiring portion to the outer circumferential side of the spiral orbit.

[0009] In a fourth aspect, an inductor of the present invention comprises: a component body having a laminated structure formed by stacking a plurality of non-conductive material layers; and a coil disposed inside the component body, the coil being composed of a plurality of line conductors each extending along an interface between the non-conductive material layers and a plurality of via conductors penetrating the non-conductive material layers in a thickness direction, the line conductors having pad portions connected to the via conductors and line wiring portions connected to the pad portions, the line conductors and the via conductors being alternately connected to each other to form a coil extending along a spiral trajectory, the via conductors including elongated via conductors extending along the line conductors, the pad portions including elongated pad portions connected to the elongated via conductors, The width dimension of the longitudinal pad portion is larger than the width dimension of the line wiring portion, the line wiring portion includes an axisymmetric line wiring portion having an axisymmetric shape, and the longitudinal pad portion connected to the axisymmetric line wiring portion includes a third portion and a fourth portion arranged in sequence in the extension direction of the line conductor, and when the axisymmetric line wiring portion is folded back toward the third portion and the fourth portion about its axis of symmetry to form a virtual line wiring portion, the inner peripheral edge of the third portion is located on the inner peripheral edge of the virtual line wiring portion, the outer peripheral edge of the third portion protrudes from the outer peripheral edge of the virtual line wiring portion, the inner peripheral edge of the fourth portion protrudes from the inner peripheral edge of the virtual line wiring portion, and the outer peripheral edge of the fourth portion is located on the outer peripheral edge of the virtual line wiring portion. Effect of the Invention

[0010] According to the present invention, an inductor capable of improving the Q characteristic can be provided. [Brief description of the drawings]

[0011] [Figure 1] 1 is a perspective view showing the appearance of an inductor 11 according to a first embodiment of the present invention. [Diagram 2] 2 is a perspective view of the inductor 11 shown in FIG. 1 in the axial direction of a coil 20. FIG. [Diagram 3]3 is a plan view of a portion of the inductor 11 shown in FIG. 2, showing a non-conductive material layer 19-1 provided with a line conductor 23-1 providing a first end 21 of the coil 20. FIG. [Figure 4] 3 is a cross-sectional view showing a part of the inductor 11 shown in FIG. 2, illustrating a non-conductive material layer 19-2 provided with a via conductor 24-1 connected to a line conductor 23-1. FIG. [Diagram 5] 3 is a plan view showing a part of the inductor 11 shown in FIG. 2, illustrating a non-conductive material layer 19-2 provided with a line conductor 23-2 connected to a via conductor 24-1. [Figure 6] 3 is a cross-sectional view showing a portion of the inductor 11 shown in FIG. 2, illustrating a non-conductive material layer 19-3 provided with a via conductor 24-2 connected to a line conductor 23-2. FIG. [Figure 7] 3 is a plan view showing a part of the inductor 11 shown in FIG. 2, illustrating a non-conductive material layer 19-3 provided with a line conductor 23-3 connected to a via conductor 24-2. [Figure 8] 3 is a cross-sectional view showing a part of the inductor 11 shown in FIG. 2, illustrating a non-conductive material layer 19-4 provided with a via conductor 24-3 connected to a line conductor 23-3. FIG. [Figure 9-1] 3 is a plan view showing a part of the inductor 11 shown in FIG. 2, illustrating a non-conductive material layer 19-4 provided with a line conductor 23-4 connected to a via conductor 24-3. FIG. [Figure 9-2] FIG. 9-2 is an enlarged plan view of a portion of FIG. 9-1. [Figure 10] 3 is a cross-sectional view showing a portion of the inductor 11 shown in FIG. 2, illustrating a non-conductive material layer 19-5 provided with a via conductor 24-4 connected to a line conductor 23-4. FIG. [Figure 11] 3 is a plan view showing a portion of the inductor 11 shown in FIG. 2, illustrating a non-conductive material layer 19-5 provided with a line conductor 23-5 connected to a via conductor 24-4. [Figure 12]3 is a cross-sectional view showing a portion of the inductor 11 shown in FIG. 2, illustrating a non-conductive material layer 19-6 provided with a via conductor 24-5 connected to a line conductor 23-5. [Figure 13] FIG. 3 is a plan view showing a portion of the inductor 11 shown in FIG. 2, illustrating a non-conductive material layer 19-6 provided with a line conductor 23-6 connected to a via conductor 24-5. [Figure 14] 3 is a cross-sectional view showing a portion of the inductor 11 shown in FIG. 2, illustrating a non-conductive material layer 19-7 provided with a via conductor 24-6 connected to a line conductor 23-6. FIG. [Figure 15] 3 is a plan view showing a portion of the inductor 11 shown in FIG. 2, illustrating a non-conductive material layer 19-7 provided with a line conductor 23-7 connected to a via conductor 24-6. FIG. [Figure 16] 3 is a cross-sectional view showing a portion of the inductor 11 shown in FIG. 2, illustrating a non-conductive material layer 19-8 provided with a via conductor 24-7 connected to a line conductor 23-7. FIG. [Figure 17] 3 is a plan view showing a portion of the inductor 11 shown in FIG. 2, illustrating a non-conductive material layer 19-8 provided with a line conductor 23-8 connected to a via conductor 24-7. [Figure 18] 3 is a cross-sectional view showing a portion of the inductor 11 shown in FIG. 2, illustrating a non-conductive material layer 19-9 provided with a via conductor 24-8 connected to a line conductor 23-8. [Figure 19] 3 is a plan view showing a portion of the inductor 11 shown in FIG. 2, illustrating a non-conductive material layer 19-9 provided with a line conductor 23-9 connected to a via conductor 24-8. [Figure 20] 3 is a cross-sectional view showing a portion of the inductor 11 shown in FIG. 2, illustrating a non-conductive material layer 19-10 provided with a via conductor 24-9 connected to a line conductor 23-9. [Figure 21] 3 is a plan view showing a portion of the inductor 11 shown in FIG. 2, illustrating a non-conductive material layer 19-10 provided with a line conductor 23-10 connected to a via conductor 24-9. [Figure 22]3 is a cross-sectional view showing a portion of the inductor 11 shown in FIG. 2, illustrating a non-conductive material layer 19-11 provided with a via conductor 24-10 connected to a line conductor 23-10. [Diagram 23] 3 is a plan view showing a part of the inductor 11 shown in FIG. 2, illustrating a non-conductive material layer 19-11 provided with a line conductor 23-11 connected to a via conductor 24-10. [Figure 24] 3 is a cross-sectional view showing a portion of the inductor 11 shown in FIG. 2, illustrating a non-conductive material layer 19-12 provided with a via conductor 24-11 connected to a line conductor 23-11. [Diagram 25] This is a plan view of a portion of the inductor 11 shown in Figure 2, showing the non-conductive material layer 19-12 provided with the line conductor 23-12 connected to the via conductor 24-11 and providing the second end 22 of the coil 20. [Figure 26] 2 is another view showing the inductor 11 shown in FIG. 1 as seen through in the axial direction of the coil 20. FIG. [Figure 27] 1. FIG. 4 is yet another view showing the inductor 11 shown in FIG. 1 as seen through in the axial direction of the coil 20. [Figure 28] 2 and shows an inductor 11A according to a second embodiment of the present invention. [Figure 29] 2 and shows an inductor 11B according to a third embodiment of the present invention. [Diagram 30] 2 and shows an inductor 11C according to a third embodiment of the present invention. [Diagram 31] FIG. 11 is a see-through perspective view of an inductor 11D according to a fourth embodiment of the present invention. [Diagram 32] 32 is a view showing the inductor 11D shown in FIG. 31 as seen through in the axial direction of a coil 20D, and corresponds to FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] The inductor of the present invention will be described below. Note that the present invention is not limited to the following configuration, and may be modified as appropriate without departing from the gist of the present invention. In addition, a combination of multiple individual preferred configurations described below also constitutes the present invention.

[0013] The following embodiments are merely examples, and it goes without saying that partial replacement or combination of the configurations shown in the different embodiments is possible. From the second embodiment onwards, the description of the matters common to the first embodiment will be omitted, and the differences will be mainly described. In particular, the same effects and advantages due to the same configuration will not be mentioned one by one for each embodiment.

[0014] In the following description, unless there is a need to distinguish between the various embodiments, they will simply be referred to as "the inductor of the present invention."

[0015] The drawings shown below are schematic diagrams, and the dimensions, aspect ratio, and scale may differ from those of the actual product.

[0016] In this specification, terms indicating the relationship between elements (e.g., "parallel," "perpendicular," "orthogonal," etc.) and terms indicating the shapes of elements not only mean the literal strict form, but also mean a range that is substantially equivalent, for example, a range that includes a difference of about a few percent.

[0017] An inductor 11 according to a first embodiment of the present invention will be described with reference to FIGS.

[0018] 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. When the component body 12 is made of a molded body such as resin, it may contain a non-magnetic filler such as silica, or a magnetic filler such as ferrite or a metal magnetic material. Furthermore, it may have a structure in which a plurality of glass, ferrite, and resin are combined. The component body 12 has a rectangular parallelepiped shape. The rectangular parallelepiped shape may have rounded or chamfered edges and corners.

[0019] More specifically, as shown in FIG. 1 , rectangular parallelepiped component body 12 has a mounting surface 13 facing the mounting board, a top surface 14 opposite mounting surface 13, a first side surface 15 and a second side surface 16 connecting mounting surface 13 and top surface 14 and facing each other, and a first end surface 17 and a second end surface 18 connecting mounting surface 13 and top surface 14, and connecting first side surface 15 and second side surface 16, respectively, and facing each other.

[0020] The component body 12 has a laminated structure in which a plurality of non-conductive material layers 19 made of the above-mentioned non-conductive material are laminated. The plurality of non-conductive material layers 19 are laminated from a first side surface 15 toward a second side surface 16, and the first side surface 15 and the second side surface 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, respectively.

[0021] As shown in FIG. 2, the coil 20 is disposed inside the component body 12. The coil 20 extends along a spiral track. The axis of the coil 20 is oriented in a direction perpendicular to the side surfaces 15 and 16, i.e., 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 line conductors 23 extending along the interface of any of the non-conductive material layers 19 between the first end 21 and the second end 22, and a plurality of via conductors penetrating any of the non-conductive material layers 19 in the thickness direction. Although the via conductors are not shown in FIG. 2, in this embodiment, all the via conductors are elongated via conductors having an elongated shape extending along the line conductor 23. The line conductors 23 have pad portions 25 connected to the via conductors at one end of each. The line conductors 23 also have line wiring portions 30 connected to the pad portions 25 at a portion other than one end of each. In the coil 20, the line conductors 23 and the via conductors are alternately connected to give the coil 20 a shape that extends along a spiral track as a whole. The pad portion 25 includes a longitudinal pad portion that is connected to a longitudinal via conductor. In this embodiment, all of the pad portions 25 shown in the figure are longitudinal pad portions that are connected to longitudinal via conductors. The reference symbol "25" used to indicate the pad portion is also used to indicate the longitudinal pad portion. Note that the interfaces between the multiple non-conductive material layers 19 may not be clear due to firing or the like.

[0022] In this specification, the direction perpendicular to the extension direction of the line conductor is defined as the width direction of the line conductor and the width directions of the pad portion and line wiring portion of the line conductor when viewed in the axial direction of the coil as shown in Fig. 2. Moreover, the width direction dimensions of the line conductor, pad portion and line wiring portion refer to the dimensions in the width direction of the line conductor, pad portion and line wiring portion.

[0023] In this embodiment, the width dimension of the line conductor 23 varies between the longitudinal pad portion 25 and the line wiring portion 30, and the width dimension of the longitudinal pad portion 25 is made larger than the width dimension of the line wiring portion 30. This makes it possible to increase the width dimension of the longitudinal via conductor connected to the longitudinal pad portion 25, thereby ensuring the connection reliability between the line conductor 23 and the longitudinal via conductor.

[0024] In this specification, the width dimension of a via conductor refers to the dimension in a direction perpendicular to the extension direction of the line conductor connected to the via conductor. However, when the via conductor is a longitudinal via conductor, the width dimension of the longitudinal via conductor can also be considered to be the dimension in a direction perpendicular to the longitudinal direction of the longitudinal via conductor.

[0025] In this embodiment, the long pad portion 25 is a uniform pad portion having a uniform width dimension. The width dimension of the uniform pad portion is the same and does not vary depending on the position in the extension direction of the line conductor 23. In other words, the width dimension of the uniform pad portion does not change in the extension direction of the line conductor 23. Note that the line conductor 23 here means the line conductor 23 having this uniform pad portion.

[0026] The line wiring portion 30 is a uniform line wiring portion having a uniform width dimension. The width dimension of the uniform line wiring portion does not vary depending on the position in the extension direction of the line conductor 23, but is the same. In other words, the width dimension of the uniform line wiring portion does not change in the extension direction of the line conductor 23. Note that the line conductor 23 here means the line conductor 23 having this line wiring portion 30.

[0027] 2, when viewed in the axial direction of the coil 20, the arrangement positions of all the line wiring parts 30 are the same. More specifically, the center positions in the width direction of all the line wiring parts 30 are on the same closed curve and are not deviated from that curve.

[0028] On the outer surface of the component body 12, a first external terminal electrode 26 and a second external terminal electrode 27 are provided, which 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 across two surfaces, namely, the mounting surface 13 of the component body 12 and 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, a solder fillet of an appropriate form can be formed when the inductor 11 is mounted on a mounting board, so that a mounting state with high reliability can be obtained in both electrical connection and mechanical joint. The first external terminal electrode 26 and the second external terminal electrode 27 are provided so as to penetrate in the thickness direction of each of the multiple non-conductive material layers 19, except for some non-conductive material layers 19 located at both ends in the stacking direction.

[0029] The surfaces of the component body 12 on which the first external terminal electrode 26 and the second external terminal electrode 27 are provided are not particularly limited, and may be provided, for example, only on the mounting surface 13 of the component body 12, or only on the first end surface 17 and the second end surface 18 of the component body 12.

[0030] The coil 20 and the external terminal electrodes 26 and 27 described above are formed by patterning a conductor film made of a conductive paste containing Ag as a conductive component. The non-conductive material layer 19 is formed by patterning, as necessary, a non-conductive material film made of a paste containing a non-conductive material containing at least one of glass, resin, and ferrite. For example, a photolithography method, a semi-additive method, a screen printing method, a transfer method, or the like is used for patterning the conductor film or the non-conductive material film.

[0031] Although not shown, a plating film may be formed on the portions of the external terminal electrodes 26 and 27 that are exposed from the component body 12. The plating film includes, for example, a Ni plating layer and a Sn plating layer thereon.

[0032] 2, when viewed in the axial direction of the coil 20, the center position in the width direction of the long pad portion 25 is shifted toward at least one of the inner and outer peripheries of the spiral track from the center position in the width direction of the line wiring portion 30. As a result, the long pad portion 25 protrudes from at least one of the inner and outer peripheries of the line wiring portion 30.

[0033] As described above, it is preferable that the longitudinal via conductor has a long length in the longitudinal direction and a large thickness in the lamination direction. Therefore, when the longitudinal via conductor is shifted to the inner periphery of the spiral track, the effect of shielding the magnetic flux passing through the inside of the coil is large, and the deterioration of the Q characteristic may not be suppressed. In contrast, in this embodiment, the thickness of the longitudinal pad portion 25 in the lamination direction can be made thinner than that of the via conductor. Therefore, as described above, when the center position in the width direction of the longitudinal pad portion 25 is shifted from the center position in the width direction of the line wiring portion 30 to at least one of the inner and outer periphery sides of the spiral track, the effect of shielding the magnetic flux passing through the inside of the coil 20 is smaller than when the longitudinal via conductor is shifted to the inner periphery side of the spiral track, and the deterioration of the Q characteristic can be suppressed. In other words, the Q characteristic can be improved.

[0034] In this embodiment, from the viewpoint of connection reliability with the longitudinal via conductors taking into consideration lamination misalignment and the like, it is preferable that the longitudinal pad portion 25 is structured to protrude outward or inward from the line wiring portion 30, and in particular, it is preferable that the longitudinal pad portion 25 is structured to protrude outward from the line wiring portion 30, except for between the line conductors 23 facing the first external terminal electrode 26 or the second external terminal electrode 27, and at the places where the surface of the component body 12 and the line conductor 23 are close to each other. This is because, as a result of numerous electric field and structure simulations, it has been found that internal stress is likely to concentrate between the line conductors facing the external terminal electrodes, and at the places where the surface of the component body and the line conductor are close to each other. The mechanism of this stress concentration is not clear, but it is thought to be due to the Lorentz force generated between the line conductors facing the external terminal electrodes and the external stress generated on the surface of the component body. Therefore, by adopting the above-mentioned preferable structure, it is possible to obtain high reliability with suppressed increase in internal stress, and high Q characteristics with the shielding of magnetic flux passing through the inside of the coil by the longitudinal pad portion 25 minimized.

[0035] More specifically, as shown in Figure 2, when viewed in the axial direction of the coil 20, it is preferable that the widthwise center position of at least the portion 25a of the longitudinal pad portion 25 that is closest to the first external terminal electrode 26 or the second external terminal electrode 27 is shifted toward the inner circumference of the spiral orbit from the widthwise center position of the line wiring portion 30.

[0036] In this specification, the portion closest 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, the distance between the outer edge of that portion and the inner end face of the first external terminal electrode or the second external terminal electrode being within the range of s1 + 3% (including the boundary value) when the minimum value of that distance is s1.

[0037] In this specification, the "inner end face of the external terminal electrode" refers to the face of the external terminal electrode opposite the face exposed on the outer surface of the inductor, which faces the coil.

[0038] Furthermore, as shown in FIG. 2, when viewed in the axial direction of coil 20, it is preferable that the widthwise center position of at least part 25b of longitudinal pad portion 25 that is closest to the surface of component body 12 is shifted toward the inner circumference of the spiral orbit from the widthwise center position of line wiring portion 30.

[0039] In this specification, the part closest to the surface of the component body means a part of the part adjacent to the surface of the component body, the distance between the outer periphery of the part and the surface of the component body being within the range of s2+3% (including the boundary value) when the minimum value of the distance is s2. The surface of the component body to which the part is closest is preferably the top surface of the component body.

[0040] Furthermore, if all the longitudinal pad portions 25 are commonly extended toward the inner circumference of the spiral track, all the longitudinal pad portions 25 will shield the magnetic flux passing through the inside of the coil 20, making it difficult to obtain an improvement in the Q characteristic. On the other hand, if all the longitudinal pad portions 25 are commonly extended toward the outer circumference of the spiral track, the improvement in the Q characteristic will be high, but as described above, high stress points (specifically, points around the first external terminal electrode 26 and the second external terminal electrode 27) may occur inside the component body 12, or the high stress points inside the component body 12 may be close to the surface (e.g., the top surface 14) of the component body 12, which may result in the component body 12 cracking, chipping, cracking, or the like.

[0041] 2, when viewed in the axial direction of the coil 20, the long pad portion 25 includes a plurality of long pad portions 25 that are offset from the center position of the line wiring portion 30 in the width direction in different directions. This makes it possible to adjust the direction and position in which the long pad portions 25 protrude from the line wiring portion 30. Therefore, it is possible to minimize the shielding of the magnetic flux passing through the inside of the coil 20 by the long pad portions 25, thereby improving the Q characteristic, while suppressing the occurrence of cracks, chipping, and breakage in the component body 12 due to an increase in internal stress.

[0042] More specifically, there are provided a plurality of longitudinal pad portions 25c whose widthwise center positions are shifted only toward the inner periphery of the spiral track from the widthwise center position of the line wiring portion 30, and a longitudinal pad portion 25d whose widthwise center positions are shifted both toward the inner periphery and outer periphery of the spiral track from the widthwise center position of the line wiring portion 30.

[0043] The longitudinal pad portion 25 may include a longitudinal pad portion whose center position in the width direction is shifted from the center position in the width direction of the line wiring portion 30 only toward the outer periphery of the spiral track.

[0044] 2, when viewed in the axial direction of the coil 20, the long pad portion 25d is also a long pad portion whose direction of deviation from the center position in the width direction of the line wiring portion 30 varies depending on the position in the extension direction of the line conductor 23. This also makes it possible to adjust the direction and position in which the long pad portion 25 protrudes from the line wiring portion 30. Therefore, it is possible to minimize the internal shielding of the coil 20 by the long pad portion 25 and improve the Q characteristic, while suppressing the occurrence of cracks, chipping, and breakage in the component body 12 due to increased stress.

[0045] More specifically, in the longitudinal pad portion 25d, the direction of deviation from the center position in the width direction of the line wiring portion 30 changes from the inner circumference side to the outer circumference side of the spiral track in the extension direction of the line conductor 23. Note that the line conductor 23 means the line conductor 23 having this longitudinal pad portion 25d.

[0046] Furthermore, as shown in FIG. 2, if the shortest distance between a corner 31 of the first external terminal electrode 26 or the second external terminal electrode 27 facing the line wiring portion 30 and the outer circumferential edge of the line wiring portion 30 when viewed through the axial direction of the coil 20 is d, the line wiring portion 30 has a first region in which a distance d1 between the inner end face 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 a second region in which a distance d2 between the inner end face 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. 2, when viewed in the axial direction of the coil 20, the center position in the width direction of the longitudinal pad portion 25 that overlaps with the first region (region with interval d1) is shifted from the center position in the width direction of the first region toward the inner periphery of the spiral track, and when viewed in the axial direction of the coil 20, the center position in the width direction of the longitudinal pad portion 25 that overlaps with the second region (region with interval d2) is shifted from the center position in the width direction of the second region toward the outer periphery of the spiral track. This makes it possible to obtain high Q characteristics by minimizing the shielding of the magnetic flux passing through the inside of the coil by the longitudinal pad portion 25 without reliably increasing the internal stress concentrated between the line conductor 23 facing the first external terminal electrode 26 or the second external terminal electrode 27 and without reliably increasing the internal stress at the adjacent portion between the surface of the component body 12, which is vulnerable to external shock, and the line conductor 23.

[0047] 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 line wiring portion 30 and the outer periphery of the line wiring portion 30 when viewed in the axial direction of the coil 20. In this embodiment, typically, as shown in Fig. 2, the distance between the corner 31 on the mounting surface 13 side among the multiple corners and the outer periphery of the line wiring portion 30 is the shortest.

[0048] In addition, the distance between the first region or the second region and the inner end face of the first external terminal electrode 26 or the second external terminal electrode 27, or the surface of the component body 12 means the distance between the outer edge of the first region or the second region and the inner end face of the first external terminal electrode 26 or the second external terminal electrode 27, or the surface of the component body 12.

[0049] Furthermore, the distance d1 between the first region and the inner end face 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).

[0050] Furthermore, the distance d1 or d2 between the first region or the second region and the inner end face of the first external terminal electrode 26 or the second external terminal electrode 27, or the surface of the component body 12 being smaller or larger than d means that the distance is below or exceeds the range of d±3%, respectively.

[0051] 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 of the inductor seen from the axial direction of the coil is taken by an X-ray fluoroscopy and measurement CT system, and the transmission image is image-processed to measure various dimensions and distances. As the X-ray fluoroscopy and measurement CT system, for example, one manufactured by Comet Technologies can be used. In the example shown in FIG. 2, the shortest distance d can be the radius of a circle C whose center is the corner 31 of the first external terminal electrode 26 or the second external terminal electrode 27 and which approximates the arc-shaped portion of the outer periphery of the line wiring portion 30.

[0052] The shortest distance d is not particularly limited, but is preferably 10 μm or more, which can suppress short circuits between the first external terminal electrode 26 and the second external terminal electrode 27 and the line wiring portion 30.

[0053] As described above, the long pad portion 25 includes a first portion (a portion protruding toward the inner circumference of the spiral track) whose center position in the width direction is shifted from the center position in the width direction of the line wiring portion 30 toward the inner circumference of the spiral track, and a second portion (a portion protruding toward the outer circumference of the spiral track) whose center position in the width direction is shifted from the center position in the width direction of the line wiring portion 30 toward the outer circumference of the spiral track. When viewed in the axial direction of the coil 20, the distance between the area of ​​the line wiring portion 30 overlapping with the first portion and the inner end face of the first external terminal electrode 26 or the second external terminal electrode 27, or the surface of the component body 12, is smaller than the distance between the area of ​​the line wiring portion 30 overlapping with the second portion and the inner end face of the first external terminal electrode 26 or the second external terminal electrode 27, or 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 the shielding of magnetic flux passing through the inside of the coil by the long pad portion 25.

[0054] The distance between the area overlapping the first part or the second part and the inner end face of the first external terminal electrode 26 or the second external terminal electrode 27, or the surface of the component body 12 means the distance between the outer edge of the area overlapping the first part or the second part and the inner end face of the first external terminal electrode 26 or the second external terminal electrode 27, or the surface of the component body 12.

[0055] The connections of the multiple line conductors 23 in the coil 20 will be described in more detail with reference mainly to FIGS.

[0056] The line conductor 23 illustrated in FIG. 2 includes 12 line conductors 23 connected through 11 via conductors. The via conductors include longitudinal via conductors that extend along the line conductors 23. In this embodiment, all of the illustrated via conductors are longitudinal via conductors. The reference symbol "24" used to indicate the via conductors is also used for the longitudinal via conductors. In the inductor of the present invention, the via conductors may include via conductors other than the longitudinal via conductors, and the pad portion may include a pad portion connected to a via conductor other than the longitudinal via conductor. Here, the via conductor other than the longitudinal via conductor means a general via conductor having a shape that does not extend along the line conductor. The pad portion may include a pad portion other than the longitudinal pad portion. The pad portion other than the longitudinal pad portion means a general pad portion having a shape that does not extend along the line conductor.

[0057] In addition, in Figures 3 to 11, in order to distinguish the 11 via conductors from one another, each of the 11 via conductors is given the reference symbols "24-1," "24-2," "24-3," "24-4," "24-5," "24-6," "24-7," "24-8," "24-9," "24-10," and "24-11."

[0058] 2, the twelve line conductors 23 are labeled with the reference characters "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 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 are provided to extend along different interfaces between the non-conductive material layers 19, respectively.

[0059] In addition, the pad portions 25 provided by one end 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 given the reference symbols "25-1", "25-2", "25-3", "25-4", "25-5", "25-6", "25-7", "25-8", "25-9", "25-10", and "25-11".

[0060] In addition, the line wiring portions 30 provided by the portions excluding one end 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, 23-11 and 23-12 are given the reference numerals "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".

[0061] The non-conductive material layers 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 on their main surfaces are labeled with the reference characters "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.

[0062] 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 line conductors 23-1 and 23-12 in which the first end 21 and the second end 22 of the coil 20 are located, respectively.

[0063] In this specification, the terms "line conductor", "drawout conductor" and "external terminal electrode" are defined and distinguished from one another as follows: "line conductor" refers to the portion that runs around when viewed transparently in the axial direction of the coil, "drawout conductor" refers to the portion that extends away from the running portion, and "external terminal electrode" refers to the portion that is exposed from the component body.

[0064] First, as shown in FIG. 3, on the non-conductive material layer 19-1, the line conductor 23-1 connected to the first external terminal electrode 26 via the first extension conductor 28 extends in the clockwise direction through the line wiring portion 30-1 to the long pad portion 25-1.

[0065] Next, the non-conductive material layer 19-2 shown in Fig. 4 is laminated on the non-conductive material layer 19-1. A longitudinal via conductor 24-1 is provided so as to penetrate the non-conductive material layer 19-2. The longitudinal via conductor 24-1 connects the line conductor 23-1 and the line conductor 23-2 shown in Fig. 5 through a longitudinal pad portion 25-1.

[0066] Next, as shown in FIG. 5, on the non-conductive material layer 19-2, the line conductor 23-2 extends in a clockwise direction from the position of the longitudinal via conductor 24-1 through the line wiring portion 30-2 to the longitudinal pad portion 25-2.

[0067] Next, the non-conductive material layer 19-3 shown in Fig. 6 is laminated on the non-conductive material layer 19-2. A longitudinal via conductor 24-2 is provided so as to penetrate the non-conductive material layer 19-3. The longitudinal via conductor 24-2 connects the line conductor 23-2 and the line conductor 23-3 shown in Fig. 7 through a longitudinal pad portion 25-2.

[0068] Next, as shown in FIG. 7, on the non-conductive material layer 19-3, the line conductor 23-3 extends in a clockwise direction from the position of the longitudinal via conductor 24-2 through the line wiring portion 30-3 to the longitudinal pad portion 25-3.

[0069] Next, the non-conductive material layer 19-4 shown in Fig. 8 is laminated on the non-conductive material layer 19-3. The longitudinal via conductor 24-3 is provided so as to penetrate the non-conductive material layer 19-4. The longitudinal via conductor 24-3 connects the line conductor 23-3 and the line conductor 23-4 shown in Fig. 9-1 through the longitudinal pad portion 25-3.

[0070] Next, as shown in FIG. 9-1, on the non-conductive material layer 19-4, the line conductor 23-4 extends in a clockwise direction from the position of the longitudinal via conductor 24-3 through the line wiring portion 30-4 to the longitudinal pad portion 25-4.

[0071] The features of the line conductor 23-4 will now be further described with reference to Figs. 9-1 and 9-2.

[0072] The line wiring portion 30-4 of the line conductor 23-4 is a line symmetrical line wiring portion 30a having a line symmetrical shape, and as shown in FIG. 9-1, the line symmetrical line wiring portion 30a has a line symmetrical shape with respect to the axis of symmetry A1.

[0073] The long pad portion 25-4 is connected to the axisymmetric line wiring portion 30a, and includes a third portion 25m and a fourth portion 25n arranged in this order in the extending direction of the line conductor 23-4, as shown in FIG. 9-2.

[0074] 9-2, the line-symmetrical line wiring portion 30a is folded back around the symmetrical axis A1 toward the third portion 25m and the fourth portion 25n to form a virtual line wiring portion 30b. In FIG. 9-2, the virtual line wiring portion 30b is indicated by a two-dot chain line.

[0075] As shown in FIG. 9-2, the inner peripheral edge of the third portion 25m of the long pad portion 25-4 is located on the inner peripheral edge of the virtual line wiring portion 30b, the outer peripheral edge of the third portion 25m of the long pad portion 25-4 protrudes from the outer peripheral edge of the virtual line wiring portion 30b, the inner peripheral edge of the fourth portion 25n of the long pad portion 25-4 protrudes from the inner peripheral edge of the virtual line wiring portion 30b, and the outer peripheral edge of the fourth portion 25n of the long pad portion 25-4 is located on the outer peripheral edge of the virtual line wiring portion 30b. This makes it possible to adjust the direction and position in which the long pad portion 25-4 protrudes from the line wiring portion 30-4. Therefore, it is possible to minimize the internal shielding of the coil 20 by the long pad portion 25-4 to improve the Q characteristic, while suppressing the occurrence of cracks, chipping, and breaks in the component body 12 due to increased stress.

[0076] As shown in FIG. 9-2, the long pad portion 25-4 may be bent between the third portion 25m and the fourth portion 25n.

[0077] Next, a non-conductive material layer 19-5 shown in Fig. 10 is laminated on the non-conductive material layer 19-4. A longitudinal via conductor 24-4 is provided so as to penetrate the non-conductive material layer 19-5. The longitudinal via conductor 24-4 connects the line conductor 23-4 and the line conductor 23-5 shown in Fig. 11 through a longitudinal pad portion 25-4.

[0078] Next, as shown in FIG. 11, on the non-conductive material layer 19-5, the line conductor 23-5 extends in a clockwise direction from the position of the longitudinal via conductor 24-4 through the line wiring portion 30-5 to the longitudinal pad portion 25-5.

[0079] The line wiring portion 30-5 is an axisymmetric line wiring portion having a shape that is axisymmetric with respect to the axis of symmetry A2, and the long pad portion 25-5, like the long pad portion 25-4, includes a third portion that extends outward from the outer periphery of the imaginary line wiring portion and a fourth portion that extends outward from the inner periphery of the imaginary line wiring portion.

[0080] Next, a non-conductive material layer 19-6 shown in Fig. 12 is laminated on the non-conductive material layer 19-5. A longitudinal via conductor 24-5 is provided so as to penetrate the non-conductive material layer 19-6. The longitudinal via conductor 24-5 connects the line conductor 23-5 and the line conductor 23-6 shown in Fig. 13 through a longitudinal pad portion 25-5.

[0081] Next, as shown in FIG. 13, on the non-conductive material layer 19-6, the line conductor 23-6 extends in a clockwise direction from the position of the longitudinal via conductor 24-5 through the line wiring portion 30-6 to the longitudinal pad portion 25-6.

[0082] Next, a non-conductive material layer 19-7 shown in Fig. 14 is laminated on the non-conductive material layer 19-6. A longitudinal via conductor 24-6 is provided so as to penetrate the non-conductive material layer 19-7. The longitudinal via conductor 24-6 connects the line conductor 23-6 and the line conductor 23-7 shown in Fig. 15 through a longitudinal pad portion 25-6.

[0083] Next, as shown in FIG. 15, on the non-conductive material layer 19-7, the line conductor 23-7 extends in a clockwise direction from the position of the longitudinal via conductor 24-6 through the line wiring portion 30-7 to the longitudinal pad portion 25-7.

[0084] The line wiring portion 30-7 is an axisymmetric line wiring portion having a shape that is axisymmetric with respect to the axis of symmetry A3, and the long pad portion 25-7, like the long pad portion 25-4, includes a third portion that extends outwardly from the virtual line wiring portion and a fourth portion that extends outwardly from the virtual line wiring portion.

[0085] Next, a non-conductive material layer 19-8 shown in Fig. 16 is laminated on the non-conductive material layer 19-7. A longitudinal via conductor 24-7 is provided so as to penetrate the non-conductive material layer 19-8. The longitudinal via conductor 24-7 connects the line conductor 23-7 and the line conductor 23-8 shown in Fig. 17 through a longitudinal pad portion 25-7.

[0086] Next, as shown in FIG. 17, on the non-conductive material layer 19-8, the line conductor 23-8 extends in a clockwise direction from the position of the longitudinal via conductor 24-7 through the line wiring portion 30-8 to the longitudinal pad portion 25-8.

[0087] The line wiring portion 30-8 is an axisymmetric line wiring portion having a shape that is axisymmetric with respect to the axis of symmetry A4, and the long pad portion 25-8, like the long pad portion 25-4, includes a third portion that extends outwardly from the virtual line wiring portion and a fourth portion that extends outwardly from the virtual line wiring portion.

[0088] Next, a non-conductive material layer 19-9 shown in Fig. 18 is laminated on the non-conductive material layer 19-8. A longitudinal via conductor 24-8 is provided so as to penetrate the non-conductive material layer 19-9. The longitudinal via conductor 24-8 connects the line conductor 23-8 and the line conductor 23-9 shown in Fig. 19 through a longitudinal pad portion 25-8.

[0089] Next, as shown in FIG. 19, on the non-conductive material layer 19-9, the line conductor 23-9 extends in a clockwise direction from the position of the longitudinal via conductor 24-8 through the line wiring portion 30-9 to the longitudinal pad portion 25-9.

[0090] Next, a non-conductive material layer 19-10 shown in Fig. 20 is laminated on the non-conductive material layer 19-9. A longitudinal via conductor 24-9 is provided so as to penetrate the non-conductive material layer 19-10. The longitudinal via conductor 24-9 connects the line conductor 23-9 and the line conductor 23-10 shown in Fig. 21 through a longitudinal pad portion 25-9.

[0091] Next, as shown in FIG. 21, on the non-conductive material layer 19-10, the line conductor 23-10 extends in a clockwise direction from the position of the longitudinal via conductor 24-9 through the line wiring portion 30-10 to the longitudinal pad portion 25-10.

[0092] Next, a non-conductive material layer 19-11 shown in Fig. 22 is laminated on the non-conductive material layer 19-10. A longitudinal via conductor 24-10 is provided so as to penetrate the non-conductive material layer 19-11. The longitudinal via conductor 24-10 connects the line conductor 23-10 and the line conductor 23-11 shown in Fig. 23 through a longitudinal pad portion 25-10.

[0093] Next, as shown in FIG. 23, on the non-conductive material layer 19-11, the line conductor 23-11 extends in a clockwise direction from the position of the longitudinal via conductor 24-10 through the line wiring portion 30-11 to the longitudinal pad portion 25-11.

[0094] The line wiring portion 30-11 is an axisymmetric line wiring portion having a shape that is axisymmetric with respect to the axis of symmetry A5, and the long pad portion 25-11, like the long pad portion 25-4, includes a third portion that extends outward from the outer periphery of the imaginary line wiring portion and a fourth portion that extends outward from the inner periphery of the imaginary line wiring portion.

[0095] Next, the non-conductive material layer 19-12 shown in Fig. 24 is laminated on the non-conductive material layer 19-11. The long via conductor 24-11 is provided so as to penetrate the non-conductive material layer 19-12. The long via conductor 24-11 connects the line conductor 23-11 and the line conductor 23-12 shown in Fig. 25 through the long pad portion 25-11.

[0096] Next, as shown in Figure 25, on the non-conductive material layer 19-12, the line conductor 23-12 extends in a clockwise direction from the position of the elongated via conductor 24-11 through the line wiring portion 30-12 and is connected to the second external terminal electrode 27 via the second extraction conductor 29.

[0097] In this embodiment, the long pad portion 25 is provided only on one end of each line conductor 23, but the line conductors 23, except for the line conductors 23-1 and 23-12 connected to the lead conductors 28 and 29, may each be provided with the long pad portion 25 on both ends. For example, in the line conductor 23-2 shown in Fig. 5, a long pad portion having the same shape as the long pad portion 25-1 of the line conductor 23-1 shown in Fig. 3 may be provided on the end opposite to the end where the long pad portion 25-2 is provided.

[0098] The structure of the multiple longitudinal via conductors 24 in the coil 20 will be described more specifically with reference mainly to FIGS.

[0099] 26, the width direction dimension of the longitudinal via conductor 24 may be larger than the width direction 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 characteristic can be achieved.

[0100] 27, the width dimension of the longitudinal via conductor 24 may be smaller than the width dimension of the line wiring portion 30, and the longitudinal via conductor 24 may not protrude from the spiral path when viewed in the axial direction of the coil 20. In this case, the high stress area can be further removed from the stress concentration area and the area directly subjected to external impact, and the electrode volume of the longitudinal via conductor 24 can be reduced. Therefore, higher reliability and higher Q characteristics can be achieved.

[0101] In the inductor of the present invention, the via conductor may include a via conductor having the same width dimension as the line wiring portion, and the center position of the via conductor in the width direction may not be shifted to either the inner or outer periphery side of the spiral track from the center position of the line wiring portion in the width direction when viewed through the axial direction of the coil. Also, the pad portion may include a pad portion having the same width dimension as the line wiring portion, and the center position of the pad portion in the width direction may not be shifted to either the inner or outer periphery side of the spiral track from the center position of the line wiring portion in the width direction when viewed through the axial direction of the coil.

[0102] In either case, the width dimension of the via conductor 24 is generally the same as or smaller than the width dimension of the pad portion 25 .

[0103] As described above, according to the first embodiment, when viewed in the axial direction of the coil 20, the center position in the width direction of the long pad portion 25 is shifted from the center position in the width direction of the line wiring portion 30 to at least one of the inner and outer circumferential sides of the spiral track, so that the effect of blocking the magnetic flux passing through the inside of the coil 20 is small, and deterioration of the Q characteristic can be suppressed. In other words, the Q characteristic can be improved.

[0104] The above-mentioned effects obtained in the first embodiment are also achieved in the second and subsequent embodiments described below.

[0105] Next, an inductor 11A according to a second embodiment of the present invention will be described with reference to Fig. 28. Fig. 28 is a diagram corresponding to Fig. 2. In Fig. 28, elements corresponding to those shown in Fig. 2 are given the same reference symbols, and duplicated explanations will be omitted.

[0106] In the inductor 11A shown in FIG. 28, the component body 12 has a rectangular parallelepiped shape, similar to the inductor 11 shown in FIG. 2. However, the shape of the coil 20A of the inductor 11A shown in FIG. 28 is different from the shape of the coil 20 of the inductor 11 shown in FIG. 2 and the like. This shows that the coil can take various shapes. In the first embodiment, the coil 20, when seen through in the axial direction of the coil 20, is a rectangle with rounded corners and the central part of the long side on the mounting surface 13 side protruding toward the outer periphery. In contrast, in the present embodiment, the coil 20A has two curved parts facing the first end face 17 and the second end face 18 of the component body 12, respectively, and a straight part facing the top face 14 of the component body 12. In this way, the coil 20A has a curved part in the long axis direction (longitudinal direction) of the component body 12. More specifically, the coil 20A has an elliptical shape when seen through in the axial direction of the coil 20.

[0107] 2, in the inductor 11A shown in Fig. 28, when viewed in the axial direction of the coil 20A, the center position in the width direction of the long pad portion 25 is shifted from the center position in the width direction of the line wiring portion 30 to at least one of the inner and outer circumferential sides of the spiral track. Therefore, as in the first embodiment, the effect of blocking the magnetic flux passing through the inside of the coil 20A can be reduced, and the deterioration of the Q characteristic can be suppressed. In other words, the Q characteristic can be improved.

[0108] In this embodiment, as shown in FIG. 28, the center position in the width direction of at least a portion 25e of the longitudinal pad portion 25 that faces the top surface 14 of the component body 12 in parallel is shifted from the center position in the width direction of the line wiring portion 30 toward the inner circumference side of the spiral track, and the center position in the width direction of at least a portion 25f of the longitudinal pad portion 25 that does not face the top surface 14 in parallel is shifted from the center position in the width direction of the line wiring portion 30 toward the outer circumference side of the spiral track. This makes it possible to suppress an increase in internal stress at a position close to the top surface 14 of the component body 12 and the line conductor 23, which is vulnerable to external impact. In addition, a high Q characteristic can be obtained by minimizing the shielding of the magnetic flux passing through the inside of the coil by the longitudinal pad portion 25 without increasing the internal stress concentrated between the line conductor 23 facing the first external terminal electrode 26 or the second external terminal electrode 27. Therefore, it is possible to obtain high reliability by suppressing the increase in internal stress and high Q characteristic by minimizing the shielding of the magnetic flux passing through the inside of the coil by the longitudinal pad portion 25.

[0109] Next, inductors 11B and 11C according to a third embodiment of the present invention will be described with reference to Figures 29 and 30. Figures 29 and 30 correspond to Figure 2. In Figures 29 and 30, elements corresponding to those shown in Figure 2 are given the same reference symbols, and duplicated explanations will be omitted.

[0110] In the inductor 11B shown in Fig. 29 and the inductor 11C shown in Fig. 30, the long pad portion 25 includes a non-uniform pad portion 25g whose width dimension is not uniform. That is, the width dimension of the non-uniform pad portion 25g varies depending on the position in the extension direction of the line conductor 23.

[0111] More specifically, the width dimension of the non-uniform pad portion 25g changes from a relatively small dimension to a relatively large dimension in the extension direction of the line conductor 23. Note that the line conductor 23 here means the line conductor 23 having this non-uniform pad portion 25g.

[0112] 29 and 30, the maximum width dimension W of non-uniform pad portion 25g is larger than the width dimension of line wiring portion 30, and the minimum width dimension w of non-uniform pad portion 25g is the same as or larger than the width dimension of line wiring portion 30. Note that Figures 29 and 30 show a state in which the minimum width dimension w of non-uniform pad portion 25g is the same as the width dimension of line wiring portion 30.

[0113] As shown in Figs. 29 and 30, the center position in the width direction of the non-uniform pad portion 25g, which is a portion whose width direction dimension is larger than that of the line wiring portion 30, is shifted from the center position in the width direction of the line wiring portion to the outer periphery of the spiral track. As a result, as in the first embodiment, the effect of shielding the magnetic flux passing through the inside of the coils 20B and 20C can be reduced, and the deterioration of the Q characteristic can be suppressed and the Q characteristic can be improved. In addition, the width direction dimension of the longitudinal pad portion 25 can be expanded in an area that does not contribute to an increase in internal stress, and connection reliability can be maintained. In addition, the shielding of the magnetic flux passing through the inside of the coil by the longitudinal pad portion 25 can be minimized. Therefore, high reliability with the increase in internal stress suppressed and high Q characteristic with the shielding of the magnetic flux passing through the inside of the coil by the longitudinal pad portion 25 minimized can be obtained.

[0114] In the inductor 11B shown in Fig. 29, as in the first embodiment, if the shortest distance between a corner 31 of the first external terminal electrode 26 or the second external terminal electrode 27 facing the line wiring portion 30 and the outer periphery of the line wiring portion 30 is d when viewed in the axial direction of the coil 20, the non-uniform pad portion 25g has a first portion in which a distance d1 between the inner end face 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 a second portion in which a distance d2 between the inner end face 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. As shown in Fig. 29, the width dimension of the first portion (part with distance d1) is smaller than the width dimension of the second portion (part with distance d2). This makes it possible to suppress an increase in internal stress between the line conductor 23 facing the first external terminal electrode 26 and the second external terminal electrode 27, where internal stress is particularly concentrated, and an increase in internal stress in the vicinity of the line conductor 23 and the surface of the component body 12, where external impacts are directly applied, can be suppressed.

[0115] The distance d1 or d2 between the first part or the second part and the inner end face of the first external terminal electrode 26 or the second external terminal electrode 27, or the surface of the component body 12 means the distance between the outer edge of the first part or the second part and the inner end face of the first external terminal electrode 26 or the second external terminal electrode 27, or the surface of the component body 12.

[0116] Furthermore, the distance d1 between the first portion and the inner end face 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).

[0117] Furthermore, the distance d1 or d2 between the first part or the second part and the inner end face of the first external terminal electrode 26 or the second external terminal electrode 27, or the surface of the component body 12 being smaller or larger than d means that the distance is below or exceeds the range of d±3%, respectively.

[0118] 30, the coil 20C has two curved portions that respectively face the first end face 17 and the second end face 18 of the component body 12, and a straight portion that faces the top face 14 of the component body 12. In this manner, the coil 20C has curved portions in the major axis direction (longitudinal direction) of the component body 12. More specifically, the coil 20C has an elliptical shape when seen through in the axial direction of the coil 20C.

[0119] 30, the width direction dimension of the portion 25h of the non-uniform pad portion 25g that faces parallel to the top surface 14 of the component body 12 is smaller than the width direction dimension of the portion 25j that does not face parallel to the top surface 14. This also makes it possible to suppress an increase in internal stress between the line conductor 23 that faces the first external terminal electrode 26 and the second external terminal electrode 27, where internal stress is particularly concentrated, and an increase in internal stress in the vicinity of the line conductor 23 and the surface of the component body 12, where external shock is directly applied.

[0120] In the inductor 11B shown in FIG. 29 and the inductor 11C shown in FIG. 30, the longitudinal pad portion 25 also includes uniform pad portions whose widthwise dimensions are uniform, as in the first and second embodiments, but in this embodiment, these uniform pad portions do not necessarily have to be provided.

[0121] Next, an inductor 11D according to a fourth embodiment of the present invention will be described with reference to Fig. 31 and Fig. 32. In Fig. 31, the line conductors and elongated via conductors located between the line conductor 23 and elongated via conductor 24 located closest to the mounting surface 13 and the line conductor 23 and elongated via conductor 24 located closest to the top surface 14 are omitted. Fig. 32 is a view corresponding to Fig. 2. In Figs. 31 and 32, elements corresponding to those shown in Figs. 1 and 2 are given the same reference symbols, and duplicated explanations will be omitted.

[0122] 31 and 32, similarly to the first embodiment, the width direction dimension of the long pad portion 25 is made larger than the width direction dimension of the line wiring portion 30. However, in the inductor 11D, the axis of the coil 20D is oriented in a direction perpendicular to the mounting surface 13 and the top surface 14.

[0123] 32, if the shortest distance between the surface of the component body 12 and the outer periphery of the line wiring portion 30 is D, the center position in the width direction of the portion of the long pad portion 25 where the distance D1 between the inner end face 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 is shifted from the center position in the width direction of the line wiring portion 30 to the inner periphery side of the spiral orbit, and the center position in the width direction of the portion of the long pad portion 25 where the distance D2 between the inner end face 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 shifted from the center position in the width direction of the line wiring portion 30 to the outer periphery side of the spiral orbit. As a result, as in the first embodiment, the effect of shielding the magnetic flux passing through the inside of the coil 20D can be reduced, and the deterioration of the Q characteristic can be suppressed and the Q characteristic can be improved. Moreover, it is possible to obtain high reliability by suppressing an increase in internal stress, and a high Q characteristic by minimizing the shielding of the magnetic flux passing through the inside of the coil by the longitudinal pad portion 25.

[0124] Although the surface of the component body 12 from which the shortest distance D is calculated is not limited, in this embodiment, the shortest distance D is typically the distance between the first side surface 15 or the second side surface 16 of the component body 12 and the outer peripheral edge of the line wiring portion 30.

[0125] In addition, the distance D1 or D2 between a portion of the longitudinal pad portion 25 and the inner end face of the first external terminal electrode 26 or the second external terminal electrode 27, or the surface of the component body 12 means the distance between the outer edge of that portion and the inner end face of the first external terminal electrode 26 or the second external terminal electrode 27, or the surface of the component body 12.

[0126] Furthermore, when the distance D1 between a portion of the longitudinal pad portion 25 and the inner end face 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 D, it means that the distance is within the range of D±3% (including the boundary value).

[0127] In addition, the distance D1 or D2 between a part of the longitudinal pad portion 25 and the inner end face of the first external terminal electrode 26 or the second external terminal electrode 27, or the surface of the component body 12 being smaller or larger than D means that the distance is below or exceeds the range of D±3%, respectively.

[0128] The inductors according to the first to fourth embodiments are manufactured, for example, by the following method.

[0129] <Step of Producing Mother Laminate> First, an insulating paste layer is formed by repeatedly applying an insulating paste containing a glass material, etc., whose main component is borosilicate glass, by screen printing, etc. The insulating paste layer formed here will later become the non-conductive material layer 19 that will provide the first side surface 15 of the component body 12.

[0130] Next, a photosensitive conductive paste layer is formed on the insulating paste layer by applying a photosensitive conductive paste containing, for example, Ag as a metal main component by screen printing or the like. Furthermore, the photosensitive conductive paste layer is irradiated with ultraviolet light or the like through a photomask, and then developed with an alkaline solution or the like to form a line conductor layer, an external conductor layer, and an extension conductor layer connected to the line conductor layer and the external conductor layer on the insulating paste layer. In this manner, the line conductor layer, the extension conductor layer, and the external conductor layer are formed at multiple locations by photolithography. The line conductor layer formed here will later become the line conductor 23 located closest to the first side surface 15. The extension conductor layer formed here will later become the first extension conductor 28. The external conductor layer formed here will later become a part of each of the first extension conductor 28 and the second extension conductor 29.

[0131] When forming a line conductor layer, for example, by using a photomask on which a pattern of a line conductor related to the inductor of the present invention (for example, the line conductor pattern shown in Figures 3 to 25) is drawn, the pattern of the line conductor related to the inductor of the present invention can be realized in the inductor obtained later.

[0132] In addition, when forming the line conductor layer, the lead-out conductor layer, and the external conductor layer, instead of exposure using a photomask, for example, DI exposure (also called direct image exposure or direct writing) without using a photomask may be performed.

[0133] Next, for example, a photosensitive insulating paste is applied by screen printing or the like to form a new insulating paste layer on the already formed insulating paste layer. Furthermore, the newly formed insulating paste layer is irradiated with ultraviolet light or the like through a photomask, and then developed with an alkaline solution or the like to form via holes and openings in the insulating paste layer. In this manner, an insulating paste layer having via holes and openings at multiple locations is formed by photolithography. The insulating paste layer formed here includes an insulating paste layer that will later become the non-conductive material layer 19 (excluding the non-conductive material layer 19 that provides the first side surface 15 of the component body 12 and the non-conductive material layer 19 that provides the second side surface 16 of the component body 12). The via holes formed here overlap a part of the already formed line conductor layer. The openings formed here overlap the already formed external conductor layer.

[0134] When forming the insulating paste layer provided with the via holes and the openings, for example, DI exposure without using a photomask may be performed instead of exposure using a photomask.

[0135] Next, a new photosensitive conductive paste layer is formed inside the via hole and the opening by applying a photosensitive conductive paste mainly composed of Ag or the like by screen printing or the like. Then, the photosensitive conductive paste layer is irradiated with ultraviolet light or the like through a photomask, and then developed with an alkaline solution or the like to form a via conductor layer inside the via hole, and a new line conductor layer connected to the via conductor layer is formed on the insulating paste layer. Furthermore, a new external conductor layer connected to the already formed external conductor layer is formed inside the opening, and a new external conductor layer is further formed on the external conductor layer. In this manner, the line conductor layer, the via conductor layer, and the external conductor layer are formed by photolithography. The via conductor layer formed here will later become a via conductor that connects the line conductors adjacent to each other in the coil axis direction.

[0136] When forming the line conductor layer, the via conductor layer, and the external conductor layer, for example, DI exposure without using a photomask may be performed instead of exposure using a photomask.

[0137] Thereafter, the above steps are repeated to form the insulating paste layer, the line conductor layer, the via conductor layer, and the external conductor layer into a predetermined laminated structure. For example, the line conductor layer formed here includes a line conductor layer that will later become the line conductor 23 located closest to the second side surface 16.

[0138] When forming the line conductor layer that will later become the line conductor 23 located closest to the second side surface 16 and the external conductor layer in the same layer as the line conductor layer, an extension conductor layer connected to the line conductor layer and the external conductor layer is also formed. The extension conductor layer formed here will later become the second extension conductor 29.

[0139] Finally, a new insulating paste layer is formed by repeatedly applying an insulating paste containing a glass material, the main component of which is, for example, borosilicate glass, by screen printing or the like. The insulating paste layer formed here will later become the non-conductive material layer 19 that will provide the second side surface 16 of the component body 12.

[0140] In this manner, a mother laminate is produced.

[0141] The method for forming the conductor patterns of the line conductor layer, the lead-out conductor layer, the via conductor layer, and the external conductor layer is not limited to the above-mentioned photolithography method, and may be, for example, a method in which a conductive paste is printed and laminated using a screen printing plate having openings in the shape of the conductor pattern, a method in which a conductor film is formed by a sputtering method, a vapor deposition method, a foil pressing method, or the like, and then the conductor film is etched to have the shape of the conductor pattern, or a method in which a negative pattern is formed by a semi-additive method, a plating film is formed, and then unnecessary portions of the plating film are removed by etching or the like to have the shape of the conductor pattern.

[0142] When forming the conductor patterns of the line conductor layer, the lead-out conductor layer, the via conductor layer, and the external conductor layer, the conductor patterns are formed in multiple stages to realize a high aspect ratio, thereby reducing loss due to resistance at high frequencies. The method of forming the conductor patterns in multiple stages is not particularly limited, and may be, for example, a method of repeatedly overlapping the conductor patterns by repeating the steps using the photolithography method as described above, a method of repeatedly overlapping the conductor patterns formed by the semi-additive method, a method of overlapping in random order the conductor pattern formed by the semi-additive method and the conductor pattern formed by etching a plating film separately grown by plating, or a method of further growing the plating film formed by the semi-additive method by plating.

[0143] The conductive material constituting the conductor patterns of the line conductor layer, the lead-out conductor layer, the via conductor layer, and the external conductor layer is not limited to the photosensitive conductive paste containing Ag or the like as the main metal component, but may be, for example, a conductor containing a metal such as Ag, Au, Cu, etc. formed by a sputtering method, a vapor deposition method, a foil pressing method, a plating method, etc.

[0144] The method for forming the insulating paste layer is not limited to the above-mentioned photolithography method, and may be, for example, a method of pressing a sheet made of an insulating material, a method of spin-coating an insulating material, or a method of spray-coating an insulating material.

[0145] The method for forming the insulating paste layer having via holes and openings is not limited to the above-mentioned photolithography method, and may be, for example, a method in which an insulating film is formed by pressing a sheet made of an insulating material, spin coating an insulating material, spray coating an insulating material, or the like, and then the insulating film is subjected to laser processing, drilling processing, or the like to form via holes and openings.

[0146] The insulating material constituting the insulating paste layer is not limited to the above-mentioned glass material mainly composed of borosilicate glass, but may be, for example, a ceramic material, an organic material such as an epoxy resin, a fluororesin, or a polymer resin, a composite material such as a glass epoxy resin, etc. As the insulating material, a material having a small dielectric constant and a small dielectric loss is particularly preferable.

[0147] <Process for forming element body, coil, and external terminal electrodes> First, the mother laminate is cut by dicing or the like to be divided into a plurality of unfired laminates.

[0148] The unsintered laminate has an insulating paste lamination portion formed by laminating insulating paste layers, a line conductor lamination portion formed by laminating line conductor layers so that adjacent line conductor layers are electrically connected through via conductor layers, and an external conductor lamination portion formed by laminating external conductor layers.

[0149] When the green laminate is cut into individual pieces, the external conductor laminate portion is exposed at two locations on at least the bottom surface of the insulating paste laminate portion included in the cut surface of the green laminate.

[0150] Next, the green laminate is fired to produce a laminate.

[0151] When the green laminate is fired, the insulating paste layers become non-conductive material layers that are insulating layers, and the insulating paste laminate portion becomes the component body 12 (element). When the green laminate is fired, the line conductor layers become line conductors, and the line conductor laminate portion becomes a coil. When the green laminate is fired, one of the two external conductor laminate portions becomes part of the first external terminal electrode 26, and the other becomes part of the second external terminal electrode 27.

[0152] Next, the obtained laminate may be subjected to, for example, barrel polishing to round off the corners and ridges of the component body 12 .

[0153] Finally, the two fired external conductor laminated parts are used as base electrodes, and Ni-plated electrodes and Sn-plated electrodes are formed in that order on the surfaces of the respective base electrodes by plating. The thicknesses of the Ni-plated electrodes and Sn-plated electrodes are, for example, 2 μm or more and 10 μm or less, respectively.

[0154] In this manner, a first external terminal electrode 26 and a second external terminal electrode 27 having, in order from the front surface side of the element body 10, a base electrode, a Ni-plated electrode, and a Sn-plated electrode are formed.

[0155] The method for forming the external terminal electrode is not limited to the method of plating the external conductor lamination portion exposed on the cut surface (at least the bottom surface of the insulating paste lamination portion) of the unsintered laminate as described above, but may be, for example, a method of exposing the external conductor lamination portion on the cut surface (at least the bottom surface of the insulating paste lamination portion) of the unsintered laminate as described above, and then immersing (dipping) the exposed portion of the external conductor lamination portion in a conductive paste, or forming a film of a conductive paste on the exposed portion of the external conductor lamination portion by a sputtering method, and then performing a plating process.

[0156] In this manner, the inductors according to the first to fourth embodiments are manufactured.

[0157] The inductors according to the first to fourth embodiments are manufactured to have, for example, a 0402 (0.4 mm×0.2 mm×0.2 mm) size. The size of the inductors according to the first to fourth embodiments is not limited to the 0402 (0.4 mm×0.2 mm×0.2 mm) size.

[0158] As described above, possible molds used when forming the line conductor layer (later line conductor) include, for example, photomasks (for example, when exposure is performed by photolithography), design drawings (for example, when DI exposure is performed), etc., and when the line conductor pattern of the inductor of the present invention (for example, the line conductor patterns shown in Figures 3 to 25) is drawn on these molds, the line conductor pattern of the inductor of the present invention can be realized. Therefore, a mold (for example, a photomask, design drawing, etc.) on which the line conductor pattern of the inductor of the present invention is drawn also constitutes the present invention.

[0159] The present specification discloses the following:

[0160] <1> A component body having a laminated structure in which a plurality of non-conductive material layers are laminated; a coil disposed inside the component body, the coil being composed of a plurality of line conductors each extending along an interface between the non-conductive material layers and a plurality of via conductors penetrating the non-conductive material layers in a thickness direction, the line conductors having pad portions connected to the via conductors and line wiring portions connected to the pad portions, the line conductors and the via conductors being alternately connected to each other to form a coil extending along a spiral trajectory; the via conductor includes a longitudinal via conductor extending along the line conductor, the pad portion includes a longitudinal pad portion connected to the longitudinal via conductor, a width direction dimension of the longitudinal pad portion is larger than a width direction dimension of the line wiring portion; When viewed in the axial direction of the coil, a center position in a width direction of the long pad portion is shifted from a center position in a width direction of the line wiring portion toward at least one of an inner circumferential side and an outer circumferential side of the spiral track. Inductor.

[0161] <2> an external terminal electrode provided so as to be exposed from an outer surface of the component body and connected to one end of the coil; When viewed in the axial direction of the coil, a center position in a width direction of at least a portion of the elongate pad portion that is closest to the external terminal electrode is shifted toward an inner periphery of the spiral track from a center position in a width direction of the line wiring portion. <1> The inductor according to claim 1.

[0162] <3> When viewed in the axial direction of the coil, the center position in the width direction of at least a portion of the longitudinal pad portion that is closest to the surface of the component body is shifted toward the inner periphery of the spiral track from the center position in the width direction of the line wiring portion. <1> or <2> The inductor according to claim 1.

[0163] <4> When viewed in the axial direction of the coil, the longitudinal pad portion includes a plurality of longitudinal pad portions that are shifted in different directions from a center position of the line wiring portion in the width direction. <1> ~ <3> 2. The inductor according to claim 1 ,

[0164] <5> When viewed in the axial direction of the coil, the longitudinal pad portion includes a longitudinal pad portion whose direction of deviation from a center position in the width direction of the line wiring portion varies depending on a position in the extending direction of the line conductor. <1> ~ <4> 2. The inductor according to claim 1 ,

[0165] <6> an external terminal electrode provided so as to be exposed from an outer surface of the component body and connected to one end of the coil; When viewed in the axial direction of the coil, the shortest distance between a corner of the external terminal electrode facing the line wiring portion and an outer circumferential edge of the line wiring portion is defined as d. the line wiring portion has a first region in which a distance between the first region and an inner end face of the external terminal electrode or a surface of the component body is equal to or smaller than d, and a second region in which a distance between the first region and an inner end face of the external terminal electrode or a surface of the component body is larger than d, When viewed in the axial direction of the coil, a center position in a width direction of the longitudinal pad portion that overlaps with the first region is shifted from a center position in the width direction of the first region toward an inner periphery of the spiral track, When viewed in the axial direction of the coil, the center position in the width direction of the longitudinal pad portion that overlaps with the second region is shifted from the center position in the width direction of the second region toward the outer periphery of the spiral track. <1> ~ <5> 2. The inductor according to claim 1 ,

[0166] <7> d is 10 μm or more; <6> The inductor according to claim 1.

[0167] <8> the longitudinal pad portion includes a first portion whose widthwise center position is shifted from the widthwise center position of the line wiring portion toward the inner periphery of the spiral track, and a second portion whose widthwise center position is shifted from the widthwise center position of the line wiring portion toward the outer periphery of the spiral track, When viewed in the axial direction of the coil, a distance between a region overlapping the first portion of the line wiring portion and an inner end face of the external terminal electrode or a surface of the component body is smaller than a distance between a region overlapping the second portion of the line wiring portion and an inner end face of the external terminal electrode or a surface of the component body. <1> ~ <7> 2. The inductor according to claim 1 ,

[0168] <9> the component body has a rectangular parallelepiped shape and has a mounting surface, a top surface opposite the mounting surface, first side and second side surfaces connecting the mounting surface and the top surface and facing each other, and first end surface and second end surface connecting the mounting surface and the top surface, and connecting the first side surface and the second side surface, respectively, and facing each other; the coil has a curved portion facing the first end surface or the second end surface of the component body and a straight portion facing the top surface, a widthwise center position of at least a portion of the longitudinal pad portion that faces the top surface in parallel is shifted toward an inner periphery of the spiral track from a widthwise center position of the line wiring portion, a widthwise center position of at least a portion of the longitudinal pad portion that does not face the top surface in parallel thereto is shifted toward an outer periphery of the spiral track from a widthwise center position of the line wiring portion; <1> ~ <5> 2. The inductor according to claim 1 ,

[0169] <10> A component body having a laminated structure in which a plurality of non-conductive material layers are laminated; a coil disposed inside the component body, the coil being composed of a plurality of line conductors each extending along an interface between the non-conductive material layers and a plurality of via conductors penetrating the non-conductive material layers in a thickness direction, the line conductors having pad portions connected to the via conductors and line wiring portions connected to the pad portions, the line conductors and the via conductors being alternately connected to each other to form a coil extending along a spiral trajectory; the via conductor includes a longitudinal via conductor extending along the line conductor, the pad portion includes a longitudinal pad portion connected to the longitudinal via conductor, The longitudinal pad portion includes a non-uniform pad portion having a non-uniform width direction dimension, a maximum value of a width direction dimension of the non-uniform pad portion is greater than a width direction dimension of the line wiring portion; a minimum value of a width direction dimension of the non-uniform pad portion is equal to or greater than a width direction dimension of the line wiring portion; a center position in a width direction of a portion of the non-uniform pad portion, the center position being larger than a width direction dimension of the line wiring portion, is shifted toward an outer periphery of the spiral track from the center position in the width direction of the line wiring portion; Inductor.

[0170] <11> an external terminal electrode provided so as to be exposed from an outer surface of the component body and connected to one end of the coil; When viewed in the axial direction of the coil, the shortest distance between a corner of the external terminal electrode facing the line wiring portion and an outer circumferential edge of the line wiring portion is defined as d. The non-uniform pad portion has a first portion whose distance from the inner end face of the external terminal electrode or the surface of the component body is equal to or smaller than d; a second portion whose distance from the inner end face of the external terminal electrode or the surface of the component body is greater than d; The width dimension of the first portion is smaller than the width dimension of the second portion. <10> The inductor according to claim 1.

[0171] <12> the component body has a rectangular parallelepiped shape and has a mounting surface, a top surface opposite the mounting surface, first side and second side surfaces connecting the mounting surface and the top surface and facing each other, and first end surface and second end surface connecting the mounting surface and the top surface, and connecting the first side surface and the second side surface, respectively, and facing each other; the coil has a curved portion facing the first end surface or the second end surface of the component body and a straight portion facing the top surface, a width direction dimension of a portion of the non-uniform pad portion that faces the top surface in parallel thereto is smaller than a width direction dimension of a portion of the non-uniform pad portion that does not face the top surface in parallel thereto; <10> The inductor according to claim 1.

[0172] <13> A component body having a laminated structure in which a plurality of non-conductive material layers are laminated; a coil disposed inside the component body, the coil being composed of a plurality of line conductors each extending along an interface between the non-conductive material layers and a plurality of via conductors penetrating the non-conductive material layers in a thickness direction, the line conductors having pad portions connected to the via conductors and line wiring portions connected to the pad portions, the line conductors and the via conductors being alternately connected to each other to form a coil extending along a spiral trajectory; an external terminal electrode provided so as to be exposed from an outer surface of the component body and connected to one end of the coil; the via conductor includes a longitudinal via conductor extending along the line conductor, the pad portion includes a longitudinal pad portion connected to the longitudinal via conductor, the component body has a rectangular parallelepiped shape and has a mounting surface, a top surface opposite the mounting surface, first side and second side surfaces connecting the mounting surface and the top surface and facing each other, and first end surface and second end surface connecting the mounting surface and the top surface, and connecting the first side surface and the second side surface, respectively, and facing each other; The axis of the coil is oriented in a direction perpendicular to the mounting surface, a width direction dimension of the longitudinal pad portion is larger than a width direction dimension of the line wiring portion; If the shortest distance between the surface of the component body and the outer periphery of the line wiring portion is D, a center position in a width direction of a portion of the elongate pad portion, the center position being spaced from an inner end face of the external terminal electrode or a surface of the component body by a distance equal to or smaller than D, is shifted toward an inner periphery of the spiral track from a center position in a width direction of the line wiring portion, a center position in a width direction of a portion of the elongate pad portion, the center position being greater than a distance D from the inner end face of the external terminal electrode or the surface of the component body, is shifted toward the outer periphery of the spiral track from a center position in a width direction of the line wiring portion; Inductor.

[0173] <14> A component body having a laminated structure in which a plurality of non-conductive material layers are laminated; a coil disposed inside the component body, the coil being composed of a plurality of line conductors each extending along an interface between the non-conductive material layers and a plurality of via conductors penetrating the non-conductive material layers in a thickness direction, the line conductors having pad portions connected to the via conductors and line wiring portions connected to the pad portions, the line conductors and the via conductors being alternately connected to each other to form a coil extending along a spiral trajectory; the via conductor includes a longitudinal via conductor extending along the line conductor, the pad portion includes a longitudinal pad portion connected to the longitudinal via conductor, a width direction dimension of the longitudinal pad portion is larger than a width direction dimension of the line wiring portion; the line wiring portion includes a line symmetrical line wiring portion having a line symmetrical shape, the longitudinal pad portion connected to the axisymmetric line wiring portion includes a third portion and a fourth portion arranged in order in the extending direction of the line conductor; When the line wiring portion is folded back toward the third portion and the fourth portion about the axis of symmetry, the line wiring portion is defined as a virtual line wiring portion, an inner periphery of the third portion is located on an inner periphery of the imaginary line wiring portion; an outer periphery of the third portion protrudes beyond an outer periphery of the imaginary line wiring portion; an inner periphery of the fourth portion protrudes from an inner periphery of the imaginary line wiring portion; The outer periphery of the fourth portion is located on the outer periphery of the virtual line wiring portion. Inductor.

[0174] <15> The width direction dimension of the longitudinal via conductor is larger than the width direction dimension of the line wiring portion. <1> ~ <14> 2. The inductor according to claim 1 ,

[0175] <16> a width direction dimension of the longitudinal via conductor is smaller than a width direction dimension of the line wiring portion, When viewed in the axial direction of the coil, the elongate via conductor does not extend beyond the spiral track. <1> ~ <14> 2. The inductor according to claim 1 , [Explanation of symbols]

[0176] 11, 11A~11D Inductors 12 Part body 19 Non-conductive material layer 20, 20A~20D Coil 23 Line conductor 24 Via conductor (longitudinal via conductor) 25 Pad section (long pad section) 30 Line wiring section

Claims

1. A component body having a laminated structure in which a plurality of non-conductive material layers are laminated; a coil disposed inside the component body, the coil being composed of a plurality of line conductors each extending along an interface between the non-conductive material layers and a plurality of via conductors penetrating the non-conductive material layers in a thickness direction, the line conductors having pad portions connected to the via conductors and line wiring portions connected to the pad portions, the line conductors and the via conductors being alternately connected to each other to form a coil extending along a spiral trajectory; the via conductor includes a longitudinal via conductor extending along the line conductor, the pad portion includes a longitudinal pad portion connected to the longitudinal via conductor, a width direction dimension of the longitudinal pad portion is larger than a width direction dimension of the line wiring portion; When viewed in the axial direction of the coil, a center position in a width direction of the long pad portion is shifted from a center position in a width direction of the line wiring portion toward at least one of an inner circumferential side and an outer circumferential side of the spiral track. Inductor.

2. an external terminal electrode provided so as to be exposed from an outer surface of the component body and connected to one end of the coil; When viewed in the axial direction of the coil, a center position in a width direction of at least a portion of the elongate pad portion that is closest to the external terminal electrode is shifted toward an inner periphery of the spiral track from a center position in a width direction of the line wiring portion.

2. The inductor of claim 1.

3. When viewed in the axial direction of the coil, the center position in the width direction of at least a portion of the longitudinal pad portion that is closest to the surface of the component body is shifted toward the inner periphery of the spiral track from the center position in the width direction of the line wiring portion.

3. The inductor according to claim 1 or 2.

4. When viewed in the axial direction of the coil, the longitudinal pad portion includes a plurality of longitudinal pad portions that are shifted in different directions from a center position of the line wiring portion in the width direction.

3. The inductor according to claim 1 or 2.

5. When viewed in the axial direction of the coil, the longitudinal pad portion includes a longitudinal pad portion whose direction of deviation from a center position in the width direction of the line wiring portion varies depending on a position in the extending direction of the line conductor.

3. The inductor according to claim 1 or 2.

6. an external terminal electrode provided so as to be exposed from an outer surface of the component body and connected to one end of the coil; When viewed in the axial direction of the coil, the shortest distance between a corner of the external terminal electrode facing the line wiring portion and an outer circumferential edge of the line wiring portion is defined as d. the line wiring portion has a first region in which a distance between the line wiring portion and an inner end face of the external terminal electrode or a surface of the component body is equal to or smaller than d, and a second region in which a distance between the line wiring portion and an inner end face of the external terminal electrode or a surface of the component body is larger than d, When viewed in the axial direction of the coil, a center position in a width direction of the longitudinal pad portion that overlaps with the first region is shifted from a center position in the width direction of the first region toward an inner peripheral side of the spiral track, When viewed in the axial direction of the coil, the center position in the width direction of the longitudinal pad portion that overlaps with the second region is shifted from the center position in the width direction of the second region toward the outer periphery of the spiral track.

3. The inductor according to claim 1 or 2.

7. d is 10 μm or more; 7. The inductor of claim 6.

8. the longitudinal pad portion includes a first portion whose widthwise center position is shifted from the widthwise center position of the line wiring portion toward the inner periphery of the spiral track, and a second portion whose widthwise center position is shifted from the widthwise center position of the line wiring portion toward the outer periphery of the spiral track, When viewed in the axial direction of the coil, a distance between a region overlapping the first portion of the line wiring portion and an inner end face of the external terminal electrode or a surface of the component body is smaller than a distance between a region overlapping the second portion of the line wiring portion and an inner end face of the external terminal electrode or a surface of the component body.

3. The inductor according to claim 1 or 2.

9. the component body has a rectangular parallelepiped shape and has a mounting surface, a top surface opposite the mounting surface, first side and second side surfaces connecting the mounting surface and the top surface and opposing each other, and first end surface and second end surface connecting the mounting surface and the top surface, and connecting the first side surface and the second side surface, respectively, and opposing each other; the coil has a curved portion facing the first end surface or the second end surface of the component body and a straight portion facing the top surface, a widthwise center position of at least a portion of the longitudinal pad portion that faces the top surface in parallel is shifted toward an inner periphery of the spiral track from a widthwise center position of the line wiring portion, a widthwise center position of at least a portion of the longitudinal pad portion that does not face the top surface in parallel thereto is shifted toward an outer periphery of the spiral track from a widthwise center position of the line wiring portion; 3. The inductor according to claim 1 or 2.

10. A component body having a laminated structure in which a plurality of non-conductive material layers are laminated; a coil disposed inside the component body, the coil being composed of a plurality of line conductors each extending along an interface between the non-conductive material layers and a plurality of via conductors penetrating the non-conductive material layers in a thickness direction, the line conductors having pad portions connected to the via conductors and line wiring portions connected to the pad portions, the line conductors and the via conductors being alternately connected to each other to form a coil extending along a spiral trajectory; the via conductor includes a longitudinal via conductor extending along the line conductor, the pad portion includes a longitudinal pad portion connected to the longitudinal via conductor, The longitudinal pad portion includes a non-uniform pad portion having a non-uniform width direction dimension, a maximum value of a width direction dimension of the non-uniform pad portion is greater than a width direction dimension of the line wiring portion; a minimum value of a width direction dimension of the non-uniform pad portion is equal to or greater than a width direction dimension of the line wiring portion; a center position in a width direction of a portion of the non-uniform pad portion, the center position being larger than a width direction dimension of the line wiring portion, is shifted toward an outer periphery of the spiral track from the center position in the width direction of the line wiring portion; Inductor.

11. an external terminal electrode provided so as to be exposed from an outer surface of the component body and connected to one end of the coil; When viewed in the axial direction of the coil, the shortest distance between a corner of the external terminal electrode facing the line wiring portion and an outer circumferential edge of the line wiring portion is defined as d. The non-uniform pad portion has a first portion whose distance from the inner end face of the external terminal electrode or the surface of the component body is equal to or smaller than d; a second portion whose distance from the inner end face of the external terminal electrode or the surface of the component body is greater than d, A width dimension of the first portion is smaller than a width dimension of the second portion.

11. The inductor of claim 10.

12. the component body has a rectangular parallelepiped shape and has a mounting surface, a top surface opposite the mounting surface, first side and second side surfaces connecting the mounting surface and the top surface and opposing each other, and first end surface and second end surface connecting the mounting surface and the top surface, and connecting the first side surface and the second side surface, respectively, and opposing each other; the coil has a curved portion facing the first end surface or the second end surface of the component body and a straight portion facing the top surface, a width direction dimension of a portion of the non-uniform pad portion that faces the top surface in parallel thereto is smaller than a width direction dimension of a portion of the non-uniform pad portion that does not face the top surface in parallel thereto; 11. The inductor of claim 10.

13. A component body having a laminated structure in which a plurality of non-conductive material layers are laminated; a coil disposed inside the component body, the coil being composed of a plurality of line conductors each extending along an interface between the non-conductive material layers and a plurality of via conductors penetrating the non-conductive material layers in a thickness direction, the line conductors having pad portions connected to the via conductors and line wiring portions connected to the pad portions, the line conductors and the via conductors being alternately connected to each other to form a coil extending along a spiral trajectory; an external terminal electrode provided so as to be exposed from an outer surface of the component body and connected to one end of the coil; the via conductor includes a longitudinal via conductor extending along the line conductor, the pad portion includes a longitudinal pad portion connected to the longitudinal via conductor, the component body has a rectangular parallelepiped shape and has a mounting surface, a top surface opposite the mounting surface, first side and second side surfaces connecting the mounting surface and the top surface and opposing each other, and first end surface and second end surface connecting the mounting surface and the top surface, and connecting the first side surface and the second side surface, respectively, and opposing each other; The axis of the coil is oriented in a direction perpendicular to the mounting surface, a width direction dimension of the longitudinal pad portion is larger than a width direction dimension of the line wiring portion; If the shortest distance between the surface of the component body and the outer periphery of the line wiring portion is D, a center position in a width direction of a portion of the elongate pad portion, the center position being spaced from an inner end face of the external terminal electrode or a surface of the component body by a distance equal to or smaller than D, is shifted toward an inner periphery of the spiral track from a center position in a width direction of the line wiring portion, a center position in a width direction of a portion of the elongate pad portion, the center position being greater than a distance D from the inner end face of the external terminal electrode or the surface of the component body, is shifted toward the outer periphery of the spiral track from a center position in a width direction of the line wiring portion; Inductor.

14. A component body having a laminated structure in which a plurality of non-conductive material layers are laminated; a coil disposed inside the component body, the coil being composed of a plurality of line conductors each extending along an interface between the non-conductive material layers and a plurality of via conductors penetrating the non-conductive material layers in a thickness direction, the line conductors having pad portions connected to the via conductors and line wiring portions connected to the pad portions, the line conductors and the via conductors being alternately connected to each other to form a coil extending along a spiral trajectory; the via conductor includes a longitudinal via conductor extending along the line conductor, the pad portion includes a longitudinal pad portion connected to the longitudinal via conductor, a width direction dimension of the longitudinal pad portion is larger than a width direction dimension of the line wiring portion; the line wiring portion includes a line symmetrical line wiring portion having a line symmetrical shape, the longitudinal pad portion connected to the axisymmetric line wiring portion includes a third portion and a fourth portion arranged in order in a direction in which the line conductor extends, When the line wiring portion is folded back toward the third portion and the fourth portion about the axis of symmetry, a virtual line wiring portion is formed, an inner periphery of the third portion is located on an inner periphery of the imaginary line wiring portion; an outer periphery of the third portion protrudes beyond an outer periphery of the imaginary line wiring portion; an inner periphery of the fourth portion protrudes beyond an inner periphery of the imaginary line wiring portion; an outer periphery of the fourth portion is located on an outer periphery of the imaginary line wiring portion; Inductor.

15. The width direction dimension of the longitudinal via conductor is larger than the width direction dimension of the line wiring portion.

3. The inductor according to claim 1 or 2.

16. a width direction dimension of the longitudinal via conductor is smaller than a width direction dimension of the line wiring portion, When viewed in the axial direction of the coil, the elongate via conductor does not extend beyond the spiral track.

3. The inductor according to claim 1 or 2.

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