Laminated coil component

Abstract

To provide a laminated coil component having high connectivity between a coil conductor and a terminal electrode.SOLUTION: Use of a laminated coil component 1 in a high frequency circuit may generate resonance due to a stray capacity C1 or C2 generated within an element 2. Since a self-resonant frequency of the resonance depends on a magnitude of the stray capacity generated within an element 2, the laminated coil component 1 so designed that at least a part of a plurality of first pillar parts 9 are shifted in a first direction D1 from a reference position P is capable of adjusting the self-resonant frequency. Alternately, the laminated coil component 1 so designed that at least a part of a plurality of second pillar parts 10 are shifted in the first direction D1 from a reference position P is also capable of adjusting the self-resonant frequency.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a laminated coil component. [Background technology]

[0002] A known conventional laminated coil component is described in, for example, Patent Document 1. The laminated coil component described in Patent Document 1 includes an element body having a mounting surface and a main surface facing each other in the stacking direction, a coil conductor disposed within the element body, and a pair of terminal electrodes disposed on the mounting surface of the element body. The coil conductor has a wiring portion disposed on the main surface side, a wiring portion disposed on the mounting surface side, and a pillar portion extending in the stacking direction to connect the wiring portions on the main surface side and the mounting surface side.

[0003] It is known that the laminated coil components described above have stray capacitance within the element body, and resonate at a predetermined self-resonant frequency (SRF) when applied to a high-frequency circuit. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2015-141945 A Summary of the Invention [Problem to be solved by the invention]

[0005] The inventors have conducted extensive research into the self-resonant frequency of a laminated coil and have discovered a new technique for adjusting the self-resonant frequency.

[0006] An object of the present invention is to provide a laminated coil component capable of adjusting the self-resonant frequency. [Means for solving the problem]

[0007] A laminated coil component according to one aspect of the present invention includes an element body formed of a plurality of laminated insulating layers and having a mounting surface that intersects with a lamination direction, a pair of terminal electrodes that are provided on the mounting surface of the element body and face each other in a first direction on the mounting surface, and a coil conductor that is provided within the element body and is electrically connected to the pair of terminal electrodes, the coil conductor having a plurality of first wiring portions extending parallel to the mounting surface, and extending parallel to the mounting surface and along the first direction on a side farther from the mounting surface than the first wiring portions, and having a first end portion located on one side with respect to the first direction and a second end portion located on the other side. and includes a plurality of second wiring parts arranged in parallel along a second direction perpendicular to the first direction and the stacking direction, a plurality of first pillar parts extending from first ends of the plurality of second wiring parts along the stacking direction and connected to the plurality of first wiring parts respectively, and a plurality of second pillar parts extending from second ends of the plurality of second wiring parts along the stacking direction and connected to the plurality of first wiring parts respectively, wherein at least one of the plurality of first pillar parts and the plurality of second pillar parts is at least partially shifted in a direction intersecting the second direction from a reference position aligned in the second direction when viewed from the stacking direction.

[0008] In the above-mentioned laminated coil component, at least a portion of the multiple first pillar portions is shifted in a direction intersecting the second direction from a reference position where they are aligned in the second direction, or at least a portion of the multiple second pillar portions is shifted in a direction intersecting the second direction from a reference position where they are aligned in the second direction, thereby changing the distance between adjacent pillar portions and adjusting the self-resonant frequency.

[0009] In a laminated coil component according to another aspect, the second wiring portions include a plurality of long wiring portions having a relatively long length in the first direction and a plurality of short wiring portions having a relatively short length in the first direction, and the long wiring portions and the short wiring portions are alternately arranged in parallel along the second direction.

[0010] In the laminated coil component according to another aspect, the element body has a pair of side surfaces facing each other in the second direction, and the short wiring portion is closest to the side surfaces.

[0011] In a laminated coil component according to another aspect, the element body has a pair of side surfaces facing each other in the second direction, and the long wiring portion is closest to the side surfaces.

[0012] In a laminated coil component according to another aspect, the long wiring portions have the same length in the first direction, and the short wiring portions have the same length in the first direction.

[0013] In a laminated coil component according to another aspect, an opening of one turn of a coil conductor including a short wiring portion of the second wiring portion is smaller than an opening of one turn of a coil conductor including a long wiring portion of the second wiring portion.

[0014] In a laminated coil component according to another aspect, the second wiring portions have the same length in the first direction.

[0015] In a laminated coil component according to another aspect, when viewed from the stacking direction, at least one of the multiple first pillar portions and the multiple second pillar portions is shifted in the first direction from a reference position in which at least a portion of the first pillar portions and the second pillar portions are aligned in the second direction by at least the length in the first direction of the first pillar portions and the second pillar portions.

[0016] In a laminated coil component according to another aspect, in a cross section perpendicular to the stacking direction, at least one of the pillar portion and the second pillar portion has a rectangular cross section defined by two sides extending along the first direction and two sides extending along the second direction. Effect of the Invention

[0017] According to various aspects of the present invention, there is provided a laminated coil component capable of adjusting the self-resonant frequency. [Brief description of the drawings]

[0018] [Figure 1] FIG. 1 is a perspective view of a laminated coil component according to one embodiment. [Diagram 2] 2 is an exploded perspective view showing the configuration of each layer of the laminated coil component shown in FIG. 1. [Diagram 3]2A to 2C are cross-sectional views of the laminated coil component shown in FIG. 1, showing (a) a cross-sectional view taken along line AA, (b) a cross-sectional view taken along line BB, and (c) a cross-sectional view taken along line CC. [Figure 4] FIG. 2 is a diagram showing the arrangement of pillar parts, where (a) shows the arrangement of first pillar parts and (b) shows the arrangement of second pillar parts. [Diagram 5] FIG. 4 is an enlarged view of a main portion of the arrangement of the first pillars. [Figure 6] FIG. 11 is a perspective view showing a laminated coil component according to a different embodiment. [Figure 7] 7A to 7C are cross-sectional views of the laminated coil component shown in FIG. 6, showing (a) a cross-sectional view taken along line AA, (b) a cross-sectional view taken along line BB, and (c) a cross-sectional view taken along line CC. [Figure 8] FIG. 11 is a perspective view showing a laminated coil component according to a different embodiment. [Figure 9] 9A to 9C are cross-sectional views of the laminated coil component shown in FIG. 8, showing (a) a cross-sectional view taken along line AA, (b) a cross-sectional view taken along line BB, and (c) a cross-sectional view taken along line CC. [Figure 10] FIG. 11 is a perspective view showing a laminated coil component according to a different embodiment. [Figure 11] 11A to 11C are cross-sectional views of the laminated coil component shown in FIG. 10, showing (a) a cross-sectional view taken along line AA, (b) a cross-sectional view taken along line BB, and (c) a cross-sectional view taken along line CC. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same or corresponding elements are designated by the same reference numerals, and duplicated explanations will be omitted.

[0020] The laminated coil component according to the present embodiment will be described with reference to Fig. 1. Fig. 1 is a perspective view of the laminated coil component according to one embodiment. As shown in Fig. 1, the laminated coil component 1 includes an element body 2, a pair of terminal electrodes 3 and 4, and a coil conductor 5.

[0021] The element body 2 has a rectangular parallelepiped shape. The rectangular parallelepiped shape includes a rectangular parallelepiped shape with chamfered corners and ridges, and a rectangular parallelepiped shape with rounded corners and ridges. The element body 2 has a pair of end faces 2a, 2b, a pair of main faces 2c, 2d, and a pair of side faces 2e, 2f as outer surfaces. The end faces 2a, 2b face each other. The main faces 2c, 2d face each other. The side faces 2e, 2f face each other. In the following, the facing direction of the end faces 2a, 2b is a first direction D1, the facing direction of the side faces 2e, 2f is a second direction D2, and the facing direction of the main faces 2c, 2d is a third direction D3. The first direction D1, the third direction D3, and the second direction D2 are approximately perpendicular to each other.

[0022] The end faces 2a, 2b extend in the third direction D3 to connect the main faces 2c, 2d. The end faces 2a, 2b also extend in the second direction D2 to connect the side faces 2e, 2f. The main faces 2c, 2d extend in the first direction D1 to connect the end faces 2a, 2b. The main faces 2c, 2d also extend in the second direction D2 to connect the side faces 2e, 2f. The side faces 2e, 2f extend in the first direction D1 to connect the end faces 2a, 2b. The side faces 2e, 2f also extend in the third direction D3 to connect the main faces 2c, 2d.

[0023] The main surface 2d is a mounting surface, and is a surface that faces another electronic device (not shown) when the laminated coil component 1 is mounted on the other electronic device (for example, a circuit board or a laminated electronic component). The end surfaces 2a and 2b are surfaces that are continuous with the mounting surface (i.e., the main surface 2d).

[0024] The length of the element body 2 in the first direction D1 is longer than the length of the element body 2 in the third direction D3 and the length of the element body 2 in the second direction D2. The length of the element body 2 in the third direction D3 is shorter than the length of the element body 2 in the second direction D2. That is, in this embodiment, the end faces 2a, 2b, the main faces 2c, 2d and the side faces 2e, 2f have a rectangular shape. The length of the element body 2 in the third direction D3 may be equal to the length of the element body 2 in the second direction D2 or may be longer than the length of the element body 2 in the second direction D2.

[0025] In this embodiment, "equivalent" may mean not only equal but also values ​​including slight differences or manufacturing errors within a preset range. For example, if multiple values ​​are within a range of ±5% of the average value of the multiple values, the multiple values ​​are defined as equivalent.

[0026] 2, the element body 2 has a configuration in which multiple element body layers are stacked in the third direction D3, and in this embodiment, the element body 2 is composed of eight element body layers 21-28. That is, the stacking direction of the element body 2 coincides with the third direction D3. In an actual element body 2, the multiple element body layers 21-28 may be integrated to the extent that the boundaries between the layers are not visible, or may be integrated so that the boundaries between the layers are visible.

[0027] Each of the element layers 21-28 is mainly composed of a resin material. The resin material includes at least one selected from the group consisting of liquid crystal polymer, polyimide resin, crystalline polystyrene, epoxy resin, acrylic resin, bismaleimide resin, and fluorine resin. The resin material may or may not include a filler. The filler is, for example, an inorganic filler. An example of the inorganic filler is silica.

[0028] As shown in Fig. 2, of the element layers 21-28, the element layer 21 constituting the main surface 2c is composed only of a resin material. The wiring portions 6, 7, 8a-8f constituting the coil conductor 5 are embedded in the element layers 22-27. More specifically, the element layer 22 has a plurality of second wiring portions 6 embedded therein, the element layers 23-26 have wiring portions 8a-8d constituting the pillar portion 8 described below embedded therein, and the element layer 27 has a plurality of first wiring portions 7 and a wiring portion 8e constituting the pillar portion 8 embedded therein. The element layer 28 constituting the main surface 2d has a wiring portion 8f embedded therein that overlaps with the wiring portion 8e.

[0029] The wiring portions 6, 7, 8a-8f can be embedded in the element layers 22-28, respectively, by using, for example, known photolithography or plating techniques. As an example, a thick-film resist is formed on a substrate having a seed layer on its upper surface, the thick-film resist is patterned to provide openings, and the wiring portions 6, 7, 8a-8f are plated and grown in the openings. Thereafter, the thick-film resist is removed, and a resin material that will become the element layers 22-28 is applied to the substrate around the wiring portions 6, 7, 8a-8f, and finally the substrate is removed, thereby obtaining the element layers 22-28 in which the wiring portions 6, 7, 8a-8f are embedded, respectively.

[0030] Each of the base layers 21-28 may be made of a magnetic material. The magnetic material may include, for example, a Ni-Cu-Zn ferrite material, a Ni-Cu-Zn-Mg ferrite material, or a Ni-Cu ferrite material. The magnetic material may include, for example, an Fe alloy. Each of the base layers 21-28 may include a non-magnetic material, which may be a glass ceramic material or a dielectric material.

[0031] The pair of terminal electrodes 3, 4 is composed of a first terminal electrode 3 and a second terminal electrode 4. Each terminal electrode 3, 4 is provided on the element body 2. Each terminal electrode 3, 4 is arranged on the main surface 2d of the element body 2. The pair of terminal electrodes 3, 4 are provided on the element body 2 spaced apart from each other in the first direction D1. Specifically, the first terminal electrode 3 is arranged on the end face 2a side of the element body 2, and the second terminal electrode 4 is arranged on the end face 2b side of the element body 2.

[0032] The pair of terminal electrodes 3, 4 each have a rectangular shape (rectangular shape) when viewed from the third direction D3. The pair of terminal electrodes 3, 4 have the same dimensions. Each of the terminal electrodes 3, 4 is arranged such that each side of the rectangle is aligned with the first direction D1 or the second direction D2. Each of the terminal electrodes 3, 4 protrudes beyond the main surface 2d. That is, in this embodiment, the surface of each of the terminal electrodes 3, 4 is not flush with the main surface 2d. Each of the pair of terminal electrodes 3, 4 is made of a conductive material (e.g., Cu). The pair of terminal electrodes 3, 4 may be embedded in the element body 2. In this case, the pair of terminal electrodes 3, 4 may be provided substantially flush with the main surface 2d, or may protrude partially from the main surface 2d.

[0033] A plating layer (not shown) containing, for example, Ni, Sn, Au, etc. may be provided on each of the terminal electrodes 3, 4 by electrolytic plating or electroless plating. The plating layer may have, for example, a Ni plating film containing Ni and covering the terminal electrodes 3, 4, and an Au plating film containing Au and covering the Ni plating film.

[0034] The coil conductor 5 is disposed within the element body 2. The coil conductor 5 has a plurality of second wiring portions 6, a plurality of first wiring portions 7, and a plurality of pillar portions 8. The coil conductor 5 is configured by electrically connecting the second wiring portions 6, the first wiring portions 7, and the pillar portions 8. The coil axis of the coil conductor 5 is provided along the second direction D2. The second wiring portions 6, the first wiring portions 7, and the pillar portions 8 are configured of a conductive material (e.g., Cu). The second wiring portions 6, the first wiring portions 7, and the pillar portions 8 are disposed away from the end faces 2a, 2b, the main faces 2c, 2d, and the side faces 2e, 2f.

[0035] The second wiring parts 6 are arranged on the main surface 2c side of the element body 2. The second wiring parts 6 all extend along the first direction D1 and are arranged in parallel at equal intervals along the second direction D2. Each of the second wiring parts 6 has a first end 6a located on one side (the end surface 2a side in this embodiment) in the first direction D1 and a second end 6b located on the other side (the end surface 2b side in this embodiment). Each of the second wiring parts 6 connects two pillar parts 8. The second wiring part 6 is bridged across the two pillar parts 8. The first end 6a of the second wiring part 6 is connected to one end of the pillar part 8 (the end on the main surface 2c side). The second end 6b of the second wiring part 6 is connected to one end of the pillar part 8. As shown in FIG. 3, the second wiring parts 6 include a plurality of long wiring parts 6A having a relatively long length in the first direction D1 and a plurality of short wiring parts 6B having a relatively short length in the first direction D1, and in this embodiment, the second wiring parts 6 include three long wiring parts 6A and two short wiring parts 6B. The long wiring parts 6A have the same length L1 in the first direction D1, and the short wiring parts 6B have the same length L2 in the first direction D1 (L1>L2). The long wiring parts 6A and the short wiring parts 6B are alternately arranged in parallel along the second direction D2. In this embodiment, the long wiring parts 6A, the short wiring parts 6B, the long wiring parts 6A, the short wiring parts 6B, and the long wiring parts 6A are arranged in order from the side 2f of the element body 2. That is, the long wiring parts 6A are closest to the side 2f, and the long wiring parts 6A are also closest to the side 2e.

[0036] Because the length L2 of the short wiring portion 6B is shorter than the length L1 of the long wiring portion 6A, the dimension of the opening of one turn of the coil conductor 5 including the short wiring portion 6B in the first direction D1 is shorter than the opening of one turn of the coil conductor 5 including the long wiring portion 6A. Accordingly, the opening area of ​​one turn of the coil conductor 5 including the short wiring portion 6B is smaller than the opening area of ​​one turn of the coil conductor 5 including the long wiring portion 6A.

[0037] The multiple first wiring parts 7 are arranged on the main surface 2d (mounting surface) side of the element body 2. Each of the first wiring parts 7 extends along the first direction D1. Each of the first wiring parts 7 connects two pillar parts 8. The first wiring part 7 is hung across the two pillar parts 8. One end (end on the end surface 2a side) of the first wiring part 7 in the extending direction is connected to the other end (end on the main surface 2d side) of the pillar part 8. The other end (end on the end surface 2b side) of the first wiring part 7 in the extending direction is connected to the other end of the pillar part 8. The number of the multiple first wiring parts 7 is one less than the number of the multiple second wiring parts 6. That is, when the number of the second wiring parts 6 is n, the number of the first wiring parts 7 is n-1. In this embodiment, the number of the second wiring parts 6 is five, and the number of the first wiring parts 7 is four.

[0038] Each of the multiple pillar portions 8 extends along the third direction D3 and connects the second wiring portion 6 and the first wiring portion 7. Each of the multiple pillar portions 8 has a prismatic shape and has a rectangular cross section defined by two sides extending along the first direction D1 and two sides extending along the second direction D2 in a cross section perpendicular to the third direction D3.

[0039] The plurality of pillars 8 include a plurality of first pillars 9 arranged on the end face 2a side of the element body 2 and a plurality of second pillars 10 arranged on the end face 2b side of the element body 2. In this embodiment, the plurality of pillars 8 include five first pillars 9 and five second pillars 10. One end of the first pillar 9 is connected to the first end 6a of the second wiring part 6, and the other end is connected to one end of the first wiring part 7 in the extending direction (the end on the end face 2a side). Similarly, one end of the second pillar 10 is connected to the second end 6b of the second wiring part 6, and the other end is connected to the other end of the first wiring part 7 in the extending direction (the end on the end face 2b side). The first pillar 9 of the plurality of first pillars 9 that is close to the side face 2f has one end connected to the first end 6a of the second wiring part 6 and the other end that constitutes the end 5a of the coil conductor 5 and is connected to the first terminal electrode 3. Of the multiple second pillar portions 10, the second pillar portion 10 adjacent to the side surface 2e has one end connected to the second end portion 6b of the second wiring portion 6 and the other end forming the end portion 5b of the coil conductor 5 and connected to the second terminal electrode 4.

[0040] In the present embodiment, the five first pillars 9 are arranged in a staggered manner (zigzag arrangement) along the second direction D2, and the five second pillars 10 are similarly arranged in a staggered manner along the second direction D2.

[0041] The arrangement of the first pillars 9 will be described below with reference to FIG. 4. FIG. 4 shows a cross section perpendicular to the third direction D3, and as shown in FIG. 4(a), the reference positions P of the five first pillars 9 are aligned in the second direction D2 when viewed from the third direction D3. The position of the reference position P in the first direction D1 can be determined based on the position of any one of the pillars 8. Two of the five first pillars 9 are deviated from the reference position P, and the remaining three are located at the reference position P. In this embodiment, two first pillars 9 are shifted from the reference position P in the first direction D1 in a direction away from the end surface 2a (to the right in FIG. 4(a)). In this embodiment, the second and fourth two first pillars 9 from the side closer to the side surface 2f of the element body 2 are shifted, and these first pillars 9 correspond to the pillars 8 connected to the first end 6a of the short wiring portion 6B of the second wiring portion 6. The two first pillars 9 are shifted by the same shift amount K, and the shift amount K is greater than the length W of the first pillars 9 in the first direction D1 (K>W).

[0042] As shown in FIG. 4(b), of the five second pillars 10, the second and fourth second pillars 10 counting from the side surface 2f of the element body 2 are shifted from the reference position P in the first direction D1 in a direction away from the end face 2b (to the left in FIG. 4(b)), and these second pillars 10 correspond to the pillars 8 connected to the second end 6b of the short wiring portion 6B of the second wiring portion 6. The two second pillars 10 are shifted by the same shift amount K, and the shift amount K is greater than the length W of the second pillars 10 in the first direction D1 (K>W). The shift amount K of the first pillars 9 and the shift amount K of the second pillars 10 may be the same or different.

[0043] As described above, when a part of the first pillars 9 is displaced in the first direction D1, the distance between adjacent first pillars 9 becomes longer as shown in FIG. 5. If adjacent first pillars 9 were all at the reference position P aligned in the second direction D2, the distance between them would be d1, but when one of the adjacent first pillars 9 is displaced in the first direction D1, the distance between them increases to d2 (d2>d1). When the distance between them increases in this way, the stray capacitance generated between adjacent first pillars 9 decreases from C1 to C2 (C1>C2). In this embodiment, the first pillars 9 have a rectangular cross section defined by two sides extending along the first direction D1 and two sides extending along the second direction D2. Therefore, when one of the adjacent first pillars 9 is slightly displaced in the first direction D1, the facing area decreases, and the stray capacitance decreases.

[0044] Similarly, for the multiple second pillar sections 10, when one of the adjacent second pillar sections 10 is shifted in the first direction D1 and the separation distance increases, the stray capacitance generated between the adjacent second pillar sections 10 decreases. In this embodiment, like the first pillar section 9, the second pillar section 10 has a rectangular cross section defined by two sides extending along the first direction D1 and two sides extending along the second direction D2, so that even a slight shift of one of the adjacent second pillar sections 10 in the first direction D1 reduces the facing area and reduces the stray capacitance.

[0045] In the above-described laminated coil component 1, when applied to a high-frequency circuit, resonance may occur due to stray capacitance (e.g., stray capacitances C1 and C2) occurring in the element body 2. Since the self-resonant frequency varies depending on the magnitude of the stray capacitance occurring in the element body 2, the self-resonant frequency can be adjusted (for example, the self-resonant frequency can be increased or decreased) by designing the laminated coil component 1 such that at least a portion of the multiple first pillar portions 9 is shifted from the reference position P in the first direction D1. Alternatively, the self-resonant frequency can also be adjusted by designing the multiple second pillar portions 10 such that at least a portion of the multiple second pillar portions 10 is shifted from the reference position P in the first direction D1.

[0046] In addition, by shifting a part of the first pillar parts 9 in the first direction D1 or shifting a part of the second pillar parts 10 in the first direction D1, it is possible to suppress the thick-film resist from remaining during manufacturing. When adjacent pillar parts 8 are at the reference position P aligned in the second direction D2, a narrowed portion is defined between the wiring parts 8a to 8d constituting the adjacent pillar parts 8. When each pillar part 8 has a rectangular cross section defined by two sides extending along the first direction D1 and two sides extending along the second direction D2, a relatively long groove part extending along the first direction D1 is defined as the narrowed portion. In this case, when the wiring parts 8a to 8d are plated and grown in the openings provided in the thick-film resist and then the thick-film resist is removed, it is considered that a part of the thick-film resist remains in the narrowed portion between the wiring parts 8a to 8d constituting the pillar parts 8.

[0047] According to the above-mentioned laminated coil component 1, by shifting a part of the plurality of first pillar portions 9 in the first direction D1 and by shifting a part of the plurality of second pillar portions 10 in the first direction D1, the narrowed portion can be reduced and the thick-film resist can be suppressed from remaining. In particular, by setting the shift amount K of the pillar portions 8 to be equal to or greater than the length W of the pillar portions 8 in the first direction D1, no groove portion extending along the first direction D1 is defined between adjacent pillar portions 8, and the thick-film resist can be more effectively suppressed from remaining.

[0048] Furthermore, by shifting some of the first pillar portions 9 in the first direction D1 and by shifting some of the second pillar portions 10 in the first direction D1, the density (closeness) of the pillar portions 8 in the region in which the pillar portions 8 are formed decreases when viewed from the third direction D3. Therefore, even if the pillar portions 8 generate heat when the laminated coil component 1 is driven, the heat is less likely to be trapped in the region in which the pillar portions 8 are formed, and high heat dissipation properties can be achieved.

[0049] In the above-described embodiment, a configuration has been shown in which some of the pillar portions in both the multiple first pillar portions 9 and the multiple second pillar portions 10 are shifted in the first direction D1, but a configuration may also be used in which some of the pillar portions in only one of the multiple first pillar portions 9 and the multiple second pillar portions 10 are shifted in the first direction D1.

[0050] Furthermore, the direction in which some of the pillar parts are displaced from the reference position P is not limited to the first direction D1 as long as it is a direction intersecting the second direction D2. For example, the direction in which some of the pillar parts are displaced from the reference position P may be a direction inclined from the first direction D1 and the second direction D2.

[0051] The cross-sectional shape of the pillar portion 8 and the direction in which some of the pillar portions are displaced from the reference position P are not limited to the first direction D1 as long as they are a direction intersecting the second direction D2. For example, the direction in which some of the pillar portions are displaced from the reference position P may be a direction inclined from the first direction D1 and the second direction D2.

[0052] The cross-sectional shape of the pillar portion 8 may be a square shape in which two sides extending along the first direction D1 and two sides extending along the second direction D2 have the same length, or a rectangle shape in which the sides have different lengths. The cross-sectional shape of the pillar portion 8 may also be, for example, a circle, an ellipse, or a polygon.

[0053] The present invention is not necessarily limited to the above-described embodiment, and various modifications are possible without departing from the gist of the present invention.

[0054] For example, the long wiring portion 6A and the short wiring portion 6B arranged alternately in parallel along the second direction D2 may be arranged in the reverse order to that described above. That is, as in the laminated coil component 1A shown in FIGS. 6 and 7, the short wiring portion 6B, the long wiring portion 6A, the short wiring portion 6B, the long wiring portion 6A, and the short wiring portion 6B may be arranged in order from the side face 2f of the element body 2. In this case, the short wiring portion 6B is closest to the side face 2f, and the short wiring portion 6B is also closest to the side face 2e. In the laminated coil component 1A, the first pillar portions 9 may be arranged in a staggered manner along the second direction D2, and the second pillar portions 10 may be arranged in a staggered manner along the second direction D2. In the laminated coil component 1A, the self-resonant frequency can be adjusted by shifting at least a part of the first pillar portions 9 from the reference position P in the first direction D1 and shifting at least a part of the second pillar portions 10 from the reference position P in the first direction D1.

[0055] 6 and 7, the above-described laminated coil component 1 has a higher ratio of long wiring portions 6A among the multiple second wiring portions 6, and can ensure a wide opening of the coil conductor 5, thereby obtaining a high inductance. On the other hand, the laminated coil component 1A shown in FIGS. 6 and 7 has a higher ratio of short wiring portions 6B among the multiple second wiring portions 6, and the opening of the coil conductor 5 is narrower, compared to the above-described laminated coil component 1. Therefore, in the laminated coil component 1A, even when a manufacturing error occurs, the variation in the opening area of ​​the coil conductor 5 is small, and the variation in inductance is also kept low, making it easy to adjust the inductance.

[0056] 8 and 9, a multiplicity of second wiring parts 6 may have the same length in the first direction D1. In the multilayer coil component 1B, a multiplicity of second wiring parts 6 having the same length L in the first direction D1 are arranged in a zigzag pattern along the second direction D2. More specifically, the second wiring parts 6 biased toward the end face 2a and the second wiring parts 6 biased toward the end face 2b are alternately arranged in parallel along the second direction D2, and the second wiring parts 6 biased toward the end face 2b, the second wiring parts 6 biased toward the end face 2a, the second wiring parts 6 biased toward the end face 2b, the second wiring parts 6 biased toward the end face 2a, and the second wiring parts 6 biased toward the end face 2b are arranged in order from the side closer to the side surface 2f of the element body 2. In the laminated coil component 1B, the multiple first pillar portions 9 and the multiple second pillar portions 10 are arranged in the same manner (staggered arrangement) when viewed from the third direction D3. That is, counting from the side closer to the side surface 2f of the element body 2, the second and fourth two first pillar portions 9 are shifted in a direction approaching the end face 2a along the first direction D1 (to the left in FIG. 9(b)), and the second and fourth two second pillar portions 10 are also shifted in a direction away from the end face 2b along the first direction D1 (to the left in FIG. 9(b)).

[0057] In the laminated coil component 1B, the multiple first pillar portions 9 are also staggered along the second direction D2, and the multiple second pillar portions 10 are also staggered along the second direction D2. The self-resonant frequency of the laminated coil component 1B can be adjusted by shifting at least some of the multiple first pillar portions 9 from the reference position P in the first direction D1 and by shifting at least some of the multiple second pillar portions 10 from the reference position P in the first direction D1.

[0058] Furthermore, as in the laminated coil component 1C shown in FIGS. 10 and 11, a plurality of second wiring parts 6 having the same length L in the first direction D1 may be arranged obliquely. In the laminated coil component 1C, the plurality of second wiring parts 6 are biased so as to gradually move away from the end face 2a from the side face 2f to the side face 2e of the element body 2. In the laminated coil component 1C, the plurality of first pillar parts 9 are also arranged obliquely when viewed from the third direction D3, and the plurality of first pillar parts 9 are biased so as to gradually move away from the end face 2a from the side face 2f to the side face 2e of the element body 2. Similarly, the plurality of second pillar parts 10 are also arranged obliquely when viewed from the third direction D3, and the plurality of second pillar parts 10 are biased so as to gradually approach the end face 2b from the side face 2f to the side face 2e of the element body 2. In this case, the deviation amount K of the first pillar parts 9 and the second pillar parts 10 increases as they move away from the side face 2f of the element body 2.

[0059] In the laminated coil component 1C, the multiple first pillar portions 9 are arranged so as to be inclined with respect to the second direction D2, and the multiple second pillar portions 10 are also arranged so as to be inclined with respect to the second direction D2. The self-resonant frequency of the laminated coil component 1C can be adjusted by shifting at least some of the multiple first pillar portions 9 from the reference position P in the first direction D1 and by shifting at least some of the multiple second pillar portions 10 from the reference position P in the first direction D1.

[0060] As can be understood from the above description, the present specification discloses the following. [Appendix 1] an element body including a plurality of laminated insulating layers and having a mounting surface intersecting a lamination direction; a pair of terminal electrodes provided on a mounting surface of the element body and facing each other in a first direction on the mounting surface; a coil conductor provided within the element body and electrically connected to the pair of terminal electrodes; Equipped with The coil conductor is a plurality of first wiring portions extending parallel to the mounting surface; a plurality of second wiring portions extending parallel to the mounting surface and along the first direction on a side farther from the mounting surface than the first wiring portions, the second wiring portions having a first end portion located on one side with respect to the first direction and a second end portion located on the other side, and arranged in parallel along a second direction perpendicular to the first direction and the stacking direction; a plurality of first pillar portions extending from the first ends of the plurality of second wiring portions along the stacking direction and connected to the plurality of first wiring portions, respectively; a plurality of second pillar portions extending from the second ends of the plurality of second wiring portions along the stacking direction and connected to the plurality of first wiring portions, respectively; Including, a laminated coil component in which, when viewed from the stacking direction, at least a portion of at least one of the plurality of first pillar portions and the plurality of second pillar portions is shifted in a direction intersecting the second direction from a reference position aligned in the second direction. [Appendix 2] 2. The laminated coil component according to claim 1, wherein the second wiring portions include a plurality of long wiring portions having a relatively long length in the first direction and a plurality of short wiring portions having a relatively short length in the first direction, and the long wiring portions and the short wiring portions are alternately arranged in parallel along the second direction. [Appendix 3] 3. The laminated coil component according to claim 2, wherein the element body has a pair of side surfaces facing each other in the second direction, and the short wiring portion is closest to the side surfaces. [Appendix 4] 3. The laminated coil component according to claim 2, wherein the element body has a pair of side surfaces facing each other in the second direction, and the long wiring portion is closest to the side surfaces. [Appendix 5] 5. The laminated coil component according to claim 2, wherein the long wiring portions have the same length in the first direction, and the short wiring portions have the same length in the first direction. [Appendix 6] 6. The laminated coil component according to any one of appendixes 2 to 5, wherein an opening of one turn of the coil conductor including the short wiring portion of the second wiring portion is smaller than an opening of one turn of the coil conductor including the long wiring portion of the second wiring portion. [Appendix 7] 2. The laminated coil component according to claim 1, wherein the second wiring portions have the same length in the first direction. [Appendix 8] 8. The laminated coil component according to claim 1, wherein, when viewed from the stacking direction, at least one of the plurality of first pillar portions and the plurality of second pillar portions is shifted in the first direction from a reference position where at least a portion of the first pillar portions and the second pillar portions are aligned in the second direction by at least a length in the first direction of the first pillar portions and the second pillar portions. [Appendix 9] 9. The laminated coil component according to any one of Appendices 1 to 8, wherein in a cross section perpendicular to the stacking direction, at least one of the pillar portion and the second pillar portion has a rectangular cross section defined by two sides extending along the first direction and two sides extending along the second direction. [Explanation of symbols]

[0061] Reference Signs List 1, 1A, 1B, 1C... multilayer coil component, 2... element body, 2a, 2b... end faces, 2c, 2d... main surfaces, 2e, 2f... side surfaces, 3, 4... terminal electrodes, 5... coil conductor, 6... second wiring portion, 6A... long wiring portion, 6B... short wiring portion, 7... first wiring portion, 8... pillar portion, 9... first pillar portion, 10... second pillar portion, D1... first direction, D2... second direction, D3... third direction.

Claims

1. an element body including a plurality of laminated insulating layers and having a mounting surface intersecting a lamination direction; a pair of terminal electrodes provided on a mounting surface of the element body and facing each other in a first direction on the mounting surface; a coil conductor provided within the element body and electrically connected to the pair of terminal electrodes; Equipped with The coil conductor is a plurality of first wiring portions extending parallel to the mounting surface; a plurality of second wiring portions extending parallel to the mounting surface along the first direction on a side farther from the mounting surface than the first wiring portions, the second wiring portions having a first end portion located on one side with respect to the first direction and a second end portion located on the other side, and arranged in parallel along a second direction perpendicular to the first direction and the stacking direction; a plurality of first pillar portions extending from the first ends of the plurality of second wiring portions along the stacking direction and connected to the plurality of first wiring portions, respectively; a plurality of second pillar portions extending from the second ends of the plurality of second wiring portions along the stacking direction and connected to the plurality of first wiring portions, respectively; Including, when viewed from the stacking direction, at least a portion of at least one of the plurality of first pillar portions and the plurality of second pillar portions is shifted in a direction intersecting the second direction from a reference position aligned in the second direction.

2. 2. The laminated coil component according to claim 1, wherein the second wiring portions include a plurality of long wiring portions having a relatively long length in the first direction and a plurality of short wiring portions having a relatively short length in the first direction, and the long wiring portions and the short wiring portions are alternately arranged in parallel along the second direction.

3. 3. The laminated coil component according to claim 2, wherein the element body has a pair of side surfaces facing each other in the second direction, and the short wiring portion is closest to the side surfaces.

4. 3. The laminated coil component according to claim 2, wherein the element body has a pair of side surfaces facing each other in the second direction, and the long wiring portion is closest to the side surfaces.

5. 5. The laminated coil component according to claim 2, wherein the plurality of long wiring portions have the same length in the first direction, and the plurality of short wiring portions have the same length in the first direction.

6. 5. The laminated coil component according to claim 2, wherein an opening of one turn of the coil conductor including the short wiring portion of the second wiring portion is smaller than an opening of one turn of the coil conductor including the long wiring portion of the second wiring portion.

7. The laminated coil component according to claim 1 , wherein the second wiring portions have the same length in the first direction.

8. 2. The laminated coil component according to claim 1, wherein, when viewed from the stacking direction, at least one of the plurality of first pillar portions and the plurality of second pillar portions is shifted in the first direction from a reference position in which at least a portion of the first pillar portions and the second pillar portions are aligned in the second direction by at least a length in the first direction of the first pillar portions and the second pillar portions.

9. 2. The laminated coil component according to claim 1, wherein in a cross section perpendicular to the stacking direction, at least one of the pillar portion and the second pillar portion has a rectangular cross section defined by two sides extending along the first direction and two sides extending along the second direction.

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