Filter parts

Abstract

To provide a filter component capable of suppressing a variation in self-resonant frequency.SOLUTION: A filter component includes an element body 2 having main surfaces 2a and 2b facing each other in a first direction D1. A plurality of coil conductors 51, 52 and 53 are arranged in the element body 2. An adjustment electrode 6 arranged in the element body 2 has an adjustment conductor 61. An exterior electrode 4 has an electrode portion 42 positioned on a main surface 2a. The coil conductor 51 is adjacent to the main surface 2a in the first direction D1 and electrically connected to the exterior electrode 3. The adjustment conductor 61 is positioned between the coil conductor 51 and the electrode portion 42 and electrically connected to the exterior electrode 4. When viewing the adjustment conductor 61 and the electrode portion 42 in a direction toward the main surface 2b from the main surface 2a in the first direction D1, the adjustment conductor 61 is exposed from the edge 42a of the electrode portion 42.SELECTED DRAWING: Figure 2

Description

[Technical Field]

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

[0002] A known electronic component includes a rectangular parallelepiped body, a pair of external electrodes disposed at both ends of the body, and a plurality of coil conductors disposed within the body and electrically connected to one another (see, for example, Patent Document 1). The body has a pair of opposing end faces and four side faces extending to connect the pair of end faces. One of the side faces, for example, constitutes a mounting surface. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-84871 Summary of the Invention [Problem to be solved by the invention]

[0004] An object of one aspect of the present invention is to provide a filter component that can suppress variations in self-resonant frequency. [Means for solving the problem]

[0005] The present inventors have conducted research into filter components that can suppress variations in self-resonant frequency, and as a result, have newly obtained the following findings, which have led to the present invention. The external electrodes generally have a sintered metal layer. The sintered metal layer is formed, for example, by baking a conductive paste applied to the element body by a dipping method. In the dipping method, the ends of the element body are dipped into the conductive paste. If the dipping depth of the ends of the element body into the conductive paste varies when they are dipped into the conductive paste, the length of the portion of the external electrode located on the side surface in the direction in which the pair of end faces face each other will vary. Hereinafter, the portion of the external electrode located on the side surface may be referred to as the "side electrode portion." When the above-mentioned length of the side electrode portion varies, the stray capacitance generated between the side electrode portion and the coil conductor varies. For example, when the above-mentioned length of the side electrode portion increases, the stray capacitance tends to increase, and when the above-mentioned length of the side electrode portion decreases, the stray capacitance tends to decrease. The stray capacitance affects the self-resonant frequency of the filter component. When the stray capacitance varies, the self-resonant frequency of the filter component also varies. When the self-resonant frequency varies, the attenuation characteristics of the filter component vary. Therefore, when the above-mentioned variation in the length of the side electrode portion is suppressed, the variation in the stray capacitance is suppressed, and the filter component suppresses the variation in the self-resonant frequency.

[0006] A filter component according to one aspect includes a rectangular parallelepiped element body, first and second external electrodes, a plurality of coil conductors electrically connected to each other, and an adjustment electrode. The element body has a first main surface constituting a mounting surface, a second main surface facing the first main surface in a first direction, and first and second end surfaces facing each other in a second direction. The first and second external electrodes are arranged at both ends of the element body in the second direction. The plurality of coil conductors are arranged within the element body. The adjustment electrode is arranged on the element body and is spaced apart from the plurality of coil conductors. The first external electrode has a first end surface electrode portion located on the first end surface and a first main surface electrode portion located on the first main surface. The second external electrode has a second end surface electrode portion located on the second end surface and a second main surface electrode portion located on the first main surface. The plurality of coil conductors include a first coil conductor adjacent to the first principal surface in the first direction and electrically connected to the first end surface electrode portion, and a second coil conductor adjacent to the second principal surface in the first direction and electrically connected to the second end surface electrode portion. The adjusting electrode includes a first principal surface side adjusting conductor located between the first coil conductor and the second principal surface electrode portion and electrically connected to the second external electrode. When the first principal surface side adjusting conductor and the second principal surface electrode portion are viewed in the first direction, from the first principal surface toward the second principal surface, the first principal surface side adjusting conductor is exposed from an edge of the second principal surface electrode portion.

[0007] In one aspect, the first end surface electrode portion is located on the first end surface, and the second end surface electrode portion is located on the second end surface. The first principal surface electrode portion and the second principal surface electrode portion are located on the first principal surface. The first coil conductor is adjacent to the first principal surface in the first direction and is electrically connected to the first end surface electrode portion. The first-principal-surface-side adjusting conductor of the adjusting electrode is located between the first coil conductor and the second-principal-surface electrode portion and is electrically connected to the second external electrode. When the first-principal-surface-side adjusting conductor and the second-principal-surface electrode portion are viewed in the first direction, from the first principal surface toward the second principal surface, the first-principal-surface-side adjusting conductor is exposed from an edge of the second-principal-surface electrode portion. Therefore, stray capacitance is unlikely to occur between the first coil conductor and the second principal-surface electrode portion, but is likely to occur between the first coil conductor and the first-principal-surface-side adjusting conductor.

[0008] The first main surface side adjustment conductor can be formed by a method different from that of the first and second external electrodes. For example, the first main surface side adjustment conductor can be formed by the same method as that of forming the multiple coil conductors. Therefore, the position and size of the first main surface side adjustment conductor are less likely to vary. Therefore, the stray capacitance generated between the first coil conductor and the first main surface side adjustment conductor is less likely to vary. Methods for forming the multiple coil conductors include patterning, which is commonly used in the manufacturing process of electronic components. Patterning can be performed using, for example, a printing method, a transfer method, a photolithography method, or a semi-additive method. The first-principal-surface-side adjustment conductor is exposed from the edge of the second-principal-surface electrode portion. Therefore, even if the length of the second-principal-surface electrode portion varies in the second direction, the variation in the length of the second-principal-surface electrode portion in the second direction is unlikely to affect the stray capacitance generated in the first coil conductor. As a result, the stray capacitance generated in the first coil conductor is unlikely to vary, and the self-resonant frequency is unlikely to vary. The above-described aspect can suppress variations in the self-resonant frequency.

[0009] The first external electrode may have a third principal surface electrode portion located on the second principal surface. The second external electrode may have a fourth principal surface electrode portion located on the second principal surface. The adjusting electrode may have a second principal surface side adjusting conductor located between the second coil conductor and the third principal surface electrode portion and electrically connected to the first external electrode. When the second principal surface side adjusting conductor and the third principal surface electrode portion are viewed in the first direction, from the second principal surface toward the first principal surface, the second principal surface side adjusting conductor may be exposed from an edge of the third principal surface electrode portion.

[0010] The second coil conductor is adjacent to the second principal surface in the first direction and is electrically connected to the second end surface electrode portion. In a configuration in which the first external electrode has a third principal surface electrode portion and the second external electrode has a fourth principal surface electrode portion, the third principal surface electrode portion and the fourth principal surface electrode portion are located on the second principal surface. In a configuration in which the adjustment electrode has a second principal surface side adjustment conductor, the second principal surface side adjustment conductor is located between the second coil conductor and the third principal surface electrode portion and is electrically connected to the first external electrode. When the second principal surface side adjustment conductor and the third principal surface electrode portion are viewed in the first direction, from the second principal surface toward the first principal surface, the second principal surface side adjustment conductor is exposed from the edge of the third principal surface electrode portion. Therefore, stray capacitance is unlikely to occur between the second coil conductor and the third principal surface electrode portion, but is likely to occur between the second coil conductor and the second principal surface side adjustment conductor.

[0011] The second main surface side adjusting conductor can be formed by a method different from that of the first and second external electrodes. For example, the second main surface side adjusting conductor can be formed by the same method as the above-described method for forming the multiple coil conductors. Therefore, the position and size of the second main surface side adjusting conductor are less likely to vary. Therefore, the stray capacitance generated between the second coil conductor and the second main surface side adjusting conductor is less likely to vary. In a configuration in which the second-principal-surface-side adjustment conductor is exposed from an edge of the third-principal-surface electrode portion, even if the length of the third-principal-surface electrode portion varies in the second direction, the variation in the length of the third-principal-surface electrode portion in the second direction is unlikely to affect the stray capacitance generated in the second coil conductor, resulting in little variation in the stray capacitance generated in the second coil conductor and even less variation in the self-resonant frequency. This configuration can further suppress variations in the self-resonant frequency.

[0012] The adjusting electrode may include another first-principal-surface-side adjusting conductor located between the first coil conductor and the first principal-surface-electrode portion and electrically connected to the first external electrode, and another second-principal-surface-side adjusting conductor located between the second coil conductor and the fourth principal-surface-electrode portion and electrically connected to the second external electrode. When the another first-principal-surface-side adjusting conductor and the first principal-surface-electrode portion are viewed in the first direction, from the first principal surface toward the second principal surface, the another first-principal-surface-side adjusting conductor may be exposed from an edge of the first principal-surface-electrode portion. When the another second-principal-surface-side adjusting conductor and the fourth principal-surface-electrode portion are viewed in the first direction, from the second principal surface toward the first principal surface, the another second-principal-surface-side adjusting conductor may be exposed from an edge of the fourth principal-surface-electrode portion.

[0013] In a configuration in which the adjusting electrode has a separate first-principal-surface-side adjusting conductor, the separate first-principal-surface-side adjusting conductor is located between the first coil conductor and the first principal-surface electrode portion and is electrically connected to the first external electrode. When the separate first-principal-surface-side adjusting conductor and the first principal-surface electrode portion are viewed in the first direction, from the first principal surface toward the second principal surface, the separate first-principal-surface-side adjusting conductor is exposed from an edge of the first principal-surface electrode portion. Therefore, stray capacitance is unlikely to occur between the first coil conductor and the first principal-surface electrode portion, but is likely to occur between the separate first-principal-surface-side adjusting conductor and the first coil conductor. In a configuration in which the adjusting electrode has a separate second-principal-surface-side adjusting conductor, the separate second-principal-surface-side adjusting conductor is located between the second coil conductor and the fourth principal-surface electrode portion and is electrically connected to the second external electrode. When the separate second-principal-surface-side adjusting conductor and the fourth principal-surface electrode portion are viewed in the first direction, from the second principal surface toward the first principal surface, the separate second-principal-surface-side adjusting conductor is exposed from an edge of the fourth principal-surface electrode portion. Therefore, stray capacitance is unlikely to occur between the second coil conductor and the fourth principal-surface electrode portion, but is likely to occur between the separate second-principal-surface-side adjusting conductor and the second coil conductor.

[0014] The separate first principal surface side adjusting conductor and the separate second principal surface side adjusting conductor can be formed by a method different from that of the first and second external electrodes. For example, the separate first principal surface side adjusting conductor and the separate second principal surface side adjusting conductor can be formed by the same method as the above-described method for forming the multiple coil conductors. Therefore, the positions and sizes of the separate first principal surface side adjusting conductor and the separate second principal surface side adjusting conductor are less likely to vary. Therefore, the stray capacitance generated between the separate first principal surface side adjusting conductor and the first coil conductor and the stray capacitance generated between the separate second principal surface side adjusting conductor and the second coil conductor are less likely to vary. In a configuration in which the separate first-principal-surface-side adjustment conductor is exposed from an edge of the first principal-surface electrode portion, even if the length of the first principal-surface electrode portion in the second direction varies, the variation in the length of the first principal-surface electrode portion in the second direction is unlikely to affect the stray capacitance generated in the first coil conductor. In a configuration in which the separate second-principal-surface-side adjustment conductor is exposed from an edge of the fourth principal-surface electrode portion, even if the length of the fourth principal-surface electrode portion in the second direction varies, the variation in the length of the fourth principal-surface electrode portion in the second direction is unlikely to affect the stray capacitance generated in the second coil conductor. As a result, the stray capacitance generated in each of the first and second coil conductors is unlikely to vary, and the self-resonant frequency is even less likely to vary. This configuration can further suppress variations in the self-resonant frequency.

[0015] The element body may have a pair of side surfaces facing each other in the third direction. The first external electrode may have a pair of first side surface electrode portions located on the pair of side surfaces, respectively. The second external electrode may have a pair of second side surface electrode portions located on the pair of side surfaces, respectively. The adjusting electrode may have a pair of first side surface side adjusting conductors and a pair of second side surface side adjusting conductors. The pair of first side surface side adjusting conductors may be in the same layer as the multiple coil conductors, be located between corresponding coil conductors of the multiple coil conductors and the pair of first side surface electrode portions, and be electrically connected to the first external electrode. The pair of second side surface side adjusting conductors may be in the same layer as the multiple coil conductors, be located between corresponding coil conductors of the multiple coil conductors and the pair of second side surface electrode portions, and be electrically connected to the second external electrode. When the corresponding first side surface side adjusting conductor and the first side surface electrode portion are viewed in a direction perpendicular to the corresponding side surface of the pair of side surfaces, the first side surface side adjusting conductor may be exposed from an edge of the first side surface electrode portion. When the corresponding second side surface side adjustment conductor and second side surface electrode portion are viewed in a direction perpendicular to the corresponding one of the pair of side surfaces, the second side surface side adjustment conductor may be exposed from the edge of the second side surface electrode portion.

[0016] In a configuration in which the adjustment electrode has a pair of first-side-face-side adjustment conductors, the pair of first-side-face-side adjustment conductors are located in the same layer as the multiple coil conductors, between corresponding ones of the multiple coil conductors and the pair of first-side-face-electrode portions, and are electrically connected to the first external electrode. When the corresponding first-side-face-side adjustment conductors and the first-side-face-electrode portions are viewed in a direction perpendicular to the corresponding one of the pair of side faces, the first-side-face-side adjustment conductors are exposed from the edges of the first-side-face-electrode portions. Therefore, stray capacitance is unlikely to occur between the corresponding coil conductors and the first-side-face-electrode portions, but is likely to occur between the corresponding coil conductors and the first-side-face-side adjustment conductors. In a configuration in which the adjustment electrode has a pair of second-side-face-side adjustment conductors, the pair of second-side-face-side adjustment conductors are located in the same layer as the multiple coil conductors, between corresponding ones of the multiple coil conductors and the pair of second-side-face-electrode portions, and are electrically connected to the second external electrode. When the corresponding second-side-face-side adjustment conductors and the second-side-face-electrode portions are viewed in a direction perpendicular to the corresponding one of the pair of side faces, the second-side-face-side adjustment conductors are exposed from the edge of the second-side-face-electrode portions. Therefore, stray capacitance is unlikely to occur between the corresponding coil conductors and the second-side-face-electrode portions, but is likely to occur between the corresponding coil conductors and the second-side-face-side adjustment conductors.

[0017] The pair of first side-side adjusting conductors and the pair of second side-side adjusting conductors can be formed by a method different from that of the first and second external electrodes. For example, the pair of first side-side adjusting conductors and the pair of second side-side adjusting conductors can be formed by the same method as the above-described method for forming the multiple coil conductors. Therefore, the positions and sizes of the pair of first side-side adjusting conductors and the pair of second side-side adjusting conductors are less likely to vary. Therefore, the stray capacitance generated between the corresponding coil conductors and the first side-side adjusting conductors and the stray capacitance generated between the corresponding coil conductors and the second side-side adjusting conductors are less likely to vary. In a configuration in which the first side-face-side adjustment conductor is exposed from the edge of the first side-face electrode portion, even if the length of the first side-face electrode portion in the second direction varies, the variation in the length of the first side-face electrode portion in the second direction is unlikely to affect the stray capacitance generated in the corresponding coil conductor. In a configuration in which the second side-face-side adjustment conductor is exposed from the edge of the second side-face electrode portion, even if the length of the second side-face electrode portion in the second direction varies, the variation in the length of the second side-face electrode portion in the second direction is unlikely to affect the stray capacitance generated in the corresponding coil conductor. As a result, the stray capacitance generated in each of the corresponding coil conductors is unlikely to vary, and the self-resonant frequency is even less likely to vary. This configuration can further suppress variations in the self-resonant frequency.

[0018] The first-principal-surface-side adjusting conductor may be disposed on the first principal surface or within the element body. The second-principal-surface-side adjusting conductor may be disposed on the second principal surface or within the element body. The separate first-main-surface-side adjusting conductor may be disposed on the first main surface or within the element body. The separate second-principal-surface-side adjusting conductor may be disposed on the second principal surface or within the element body. Each of the pair of first side surface side adjusting conductors may be located within the element body and exposed at the side surface corresponding to the first end face. Each of the pair of second side surface side adjusting conductors may be located within the element body and exposed at the side surface corresponding to the second end face. [Effects of the Invention]

[0019] One aspect of the present invention provides a filter component that can suppress variations in self-resonant frequency. [Brief explanation of the drawings]

[0020] [Figure 1] FIG. 1 is a perspective view showing a filter component according to one embodiment. [Figure 2] FIG. 2 is a diagram showing a cross-sectional configuration of the filter component according to this embodiment. [Figure 3] FIG. 3 is an exploded perspective view of the filter component according to the present embodiment. [Figure 4] FIG. 4 is a diagram showing the external electrodes and the adjustment electrodes. [Figure 5] FIG. 5 is a diagram showing the external electrodes and the adjustment electrodes. [Figure 6] FIG. 6 is a diagram showing the external electrodes and the adjustment electrodes. [Figure 7] FIG. 7 is a diagram showing the external electrodes and the adjustment electrodes. [Figure 8] FIG. 8 is a diagram showing a cross-sectional configuration of a filter component according to a first modified example of the present embodiment. [Figure 9] FIG. 9 is a diagram showing a cross-sectional configuration of a filter component according to a second modified example of the present embodiment. [Figure 10] FIG. 10 is an exploded perspective view of a filter component according to a second modified example of the present embodiment. [Figure 11] FIG. 11 is a view showing a cross-sectional configuration of a filter component according to a third modified example of the present embodiment. [Figure 12] FIG. 12 is a view showing a cross-sectional configuration of a filter component according to a fourth modified example of the present embodiment. [Figure 13] FIG. 13 is an exploded perspective view of a filter component according to a fourth modified example of the present embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0021] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description, the same elements or elements having the same functions will be denoted by the same reference numerals, and redundant description will be omitted.

[0022] The configuration of a filter component FC1 according to this embodiment will be described with reference to Fig. 1 to Fig. 4. Fig. 1 is a perspective view showing the filter component according to this embodiment. Fig. 2 is a diagram showing a cross-sectional configuration of the filter component according to this embodiment. Fig. 3 is an exploded perspective view of the filter component according to this embodiment. Figs. 4, 5, 6, and 7 are diagrams showing external electrodes and adjustment electrodes. 1 to 3, the filter component FC1 includes an element body 2, a plurality of external electrodes 3 and 4, a plurality of coil conductors 51, 52, and 53, and an adjustment electrode 6. In this embodiment, the filter component FC1 includes two external electrodes 3 and 4 and a coil 5. The filter component FC1 includes, for example, a notch filter.

[0023] The element body 2 has a rectangular parallelepiped shape. Examples of rectangular parallelepiped shapes include 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 opposing main surfaces 2a, 2b, a pair of opposing end surfaces 2c, 2d, and a pair of opposing side surfaces 2e, 2f. In this embodiment, the pair of main surfaces 2a, 2b oppose each other in a first direction D1, the pair of end surfaces 2c, 2d oppose each other in a second direction D2, and the pair of side surfaces 2e, 2f oppose each other in a third direction D3. The pair of main surfaces 2a, 2b, the pair of end surfaces 2c, 2d, and the pair of side surfaces 2e, 2f form the outer surface of the element body 2. The pair of principal surfaces 2a, 2b and the pair of side surfaces 2e, 2f are adjacent to the end surface 2c and the end surface 2d, respectively, and extend in the second direction D2 so as to connect the end surface 2c and the end surface 2d. For example, when the principal surface 2a constitutes the first principal surface that serves as the mounting surface, the principal surface 2b constitutes the second principal surface. For example, when the end surface 2c constitutes the first end surface, the end surface 2d constitutes the second end surface. The principal surface 2a is defined as the surface that faces another electronic device when the filter component FC1 is mounted in an electronic device (not shown). The electronic device may include, for example, a circuit board or an electronic component.

[0024] As shown in FIG. 3, the element body 2 is configured by stacking multiple insulator layers 10. The insulator layers 10 are stacked in a first direction D1. Each insulator layer 10 has a rectangular shape. The rectangular shape includes a shape with rounded corners and a shape with rounded corners. The insulator layers 10 are integrated to the extent that the boundaries between the insulator layers 10 are not visible. In FIG. 3, the external electrodes 3 and 4 are not shown. Each insulator layer 10 is made of, for example, a sintered ceramic green sheet containing a ferrite material. That is, the element body 2 is made of a sintered ferrite material. The ferrite material includes, for example, a Ni-Cu-Zn ferrite material, a Ni-Cu-Zn-Mg ferrite material, or a Ni-Cu ferrite material.

[0025] The first direction D1 is the height direction of the element body 2, the second direction D2 is the length direction of the element body 2, and the third direction D3 is the width direction of the element body 2. The height of the element body 2 is, for example, not less than 0.1 mm and not more than 0.8 mm. The length of the element body 2 is, for example, not less than 0.2 mm and not more than 1.6 mm. The width of the element body 2 is, for example, not less than 0.1 mm and not more than 0.8 mm. In this embodiment, the height of the element body 2 is 0.2 mm, the length of the element body 2 is 0.4 mm, and the width of the element body 2 is 0.2 mm.

[0026] The external electrodes 3 and 4 are arranged on the element body 2. The external electrodes 3 and 4 are arranged on the element body 2 so as to face each other in the second direction D2. The external electrodes 3 and 4 are arranged at both ends of the element body 2 in the second direction D2. The external electrodes 3 and 4 are spaced apart from each other in the second direction D2. For example, when the external electrode 3 constitutes a first external electrode, the external electrode 4 constitutes a second external electrode. The external electrodes 3, 4 contain a conductive material. The conductive material includes, for example, Ag, Pd, Au, Pt, Cu, Ni, Al, Mo, or W. The conductive material may include, for example, an Ag / Pd alloy, an Ag / Cu alloy, an Ag / Au alloy, or an Ag / Pt alloy. The external electrodes 3, 4 may contain the same conductive material. The external electrodes 3, 4 may also contain different conductive materials. The external electrodes 3, 4 are formed, for example, by applying a conductive paste to the outer surface of the element body 2 by a dipping method and baking it. The conductive paste used to form the external electrodes 3, 4 contains the above-mentioned conductive material.

[0027] As shown in FIG. 1 , the external electrode 3 is arranged at the end of the element body 2 on the end face 2c side. The external electrode 3 is arranged on the end face 2c. The external electrode 3 is also arranged on each part of the pair of principal faces 2a, 2b and the pair of side faces 2e, 2f. The part of the principal face 2a where the external electrode 3 is arranged is located closer to the end face 2c. The part of the principal face 2b where the external electrode 3 is arranged is located closer to the end face 2c. The part of the side face 2e where the external electrode 3 is arranged is located closer to the end face 2c. The part of the side face 2f where the external electrode 3 is arranged is located closer to the end face 2c. The external electrode 3 is arranged over the entire end face 2c and on the ends of the pair of principal faces 2a, 2b and the pair of side faces 2e, 2f that are closer to the end face 2c.

[0028] The external electrode 3 has an electrode portion 31 located on the end face 2c, an electrode portion 32 located on the principal face 2a, an electrode portion 33 located on the principal face 2b, an electrode portion 34 located on the side face 2e, and an electrode portion 35 located on the side face 2f. Electrode portion 31 covers the entire end face 2c. Electrode portion 32 covers a portion of the principal face 2a. Electrode portion 33 covers a portion of the principal face 2b. Electrode portion 34 covers a portion of the side face 2e. Electrode portion 35 covers a portion of the side face 2f. Electrode portion 31 and electrode portion 32 are connected at a ridge between the end face 2c and the principal face 2a. Electrode portion 31 and electrode portion 33 are connected at a ridge between the end face 2c and the principal face 2b. Electrode portion 31 and electrode portion 34 are connected at a ridge between the end face 2c and the side face 2e. The electrode portion 31 and the electrode portion 35 are connected at the ridge between the end face 2c and the side face 2f. The electrode portions 31, 32, 33, 34, and 35 are integrally formed.

[0029] As shown in FIG. 1 , the external electrode 4 is arranged at the end of the element body 2 on the end face 2d side. The external electrode 4 is arranged on the end face 2d. The external electrode 4 is also arranged on a portion of each of the pair of principal faces 2a, 2b and the pair of side faces 2e, 2f. The portion of the principal face 2a where the external electrode 4 is arranged is located closer to the end face 2d. The portion of the principal face 2b where the external electrode 4 is arranged is located closer to the end face 2d. The portion of the side face 2e where the external electrode 4 is arranged is located closer to the end face 2d. The portion of the side face 2f where the external electrode 4 is arranged is located closer to the end face 2d. The external electrode 4 is arranged over the entire end face 2d and on ends of the pair of principal faces 2a, 2b and the pair of side faces 2e, 2f that are closer to the end face 2d.

[0030] The external electrode 4 has an electrode portion 41 located on the end face 2d, an electrode portion 42 located on the principal face 2a, an electrode portion 43 located on the principal face 2b, an electrode portion 44 located on the side face 2e, and an electrode portion 45 located on the side face 2f. Electrode portion 41 covers the entire end face 2d. Electrode portion 42 covers a portion of the principal face 2a. Electrode portion 43 covers a portion of the principal face 2b. Electrode portion 44 covers a portion of the side face 2e. Electrode portion 45 covers a portion of the side face 2f. Electrode portion 41 and electrode portion 42 are connected at a ridge between the end face 2d and the principal face 2a. Electrode portion 41 and electrode portion 43 are connected at a ridge between the end face 2d and the principal face 2b. Electrode portion 41 and electrode portion 44 are connected at a ridge between the end face 2d and the side face 2e. The electrode portion 41 and the electrode portion 45 are connected at the ridge between the end face 2d and the side face 2f. The electrode portions 41, 42, 43, 44, and 45 are integrally formed.

[0031] For example, when electrode portion 31 constitutes a first end surface electrode portion, electrode portion 41 constitutes a second end surface electrode portion. For example, when electrode portion 32 constitutes a first main surface electrode portion, electrode portion 42 constitutes a second main surface electrode portion, electrode portion 33 constitutes a third main surface electrode portion, and electrode portion 43 constitutes a fourth main surface electrode portion. For example, when a pair of electrode portions 34 and 35 constitute a pair of first side surface electrode portions, a pair of electrode portions 44 and 45 constitute a pair of second side surface electrode portions.

[0032] 2 and 3, the coil 5 has a plurality of coil conductors 51, 52, and 53. The plurality of coil conductors 51, 52, and 53 are arranged inside the element body 2. The plurality of coil conductors 51, 52, and 53 constitute the coil 5. Each of the coil conductors 51, 52, and 53 constitutes a part of the annular track of the coil 5. In this embodiment, the coil 5 has three coil conductors 51, 52, and 53. The coil conductor 51 is located between two adjacent insulator layers 10 in the first direction D1. The coil conductor 51 is adjacent to the main surface 2a in the first direction D1. The coil conductor 52 is located between two adjacent insulator layers 10 in the first direction D1. The coil conductor 52 is adjacent to the main surface 2b in the first direction D1. The coil conductor 53 is located between two adjacent insulator layers 10 in the first direction D1. The coil conductors 51, 52, and 53 are aligned in the first direction D1. The coil conductor 53 is located between the coil conductors 51 and 52 in the first direction D1. Coil conductor 51 and coil conductor 53 are electrically connected through via V1 that penetrates the insulator layer 10 located between coil conductor 51 and coil conductor 53. Coil conductor 52 and coil conductor 53 are electrically connected through via V2 that penetrates the insulator layer 10 located between coil conductor 52 and coil conductor 53. Coil conductors 51, 52, and 53 are electrically connected to each other. For example, when the coil conductor 51 constitutes a first coil conductor, the coil conductor 52 constitutes a second coil conductor.

[0033] The coil conductors 51, 52, and 53 may be formed by a patterning method commonly used in the manufacturing process of electronic components, such as a printing method, a transfer method, a photolithography method, or a semi-additive method. The multiple coil conductors 51, 52, and 53 include, for example, a conductive material. The conductive material includes, for example, Ag or Pd. The multiple coil conductors 51, 52, and 53 are configured, for example, as a sintered body of a conductive paste containing a conductive material. The conductive material includes, for example, Ag powder or Pd powder. The multiple coil conductors 51, 52, and 53 may contain, for example, a metal oxide. The metal oxide includes, for example, TiO2, Al2O3, or ZrO2. In this case, the multiple coil conductors 51, 52, and 53 are configured as a sintered body of a conductive paste containing the metal oxide.

[0034] As shown in FIG. 3, the coil conductor 51 is located at the outermost position in the first direction D1 and is adjacent to the main surface 2a. The coil conductor 51 includes a portion extending in the second direction D2 and a portion extending in the third direction D3, and corresponds to approximately 3 / 4 turn of the coil 5. The coil conductor 51 has an end portion 51a exposed at the end surface 2c. The coil conductor 51 is directly connected to the electrode portion 31 of the external electrode 3. The end portion 51a is directly connected to the electrode portion 31. The coil conductor 51 is electrically connected to the external electrode 3. The coil conductor 51 also has an end portion connected to the via V1.

[0035] The coil conductor 52 is located at the outermost position in the first direction D1 and is adjacent to the main surface 2b. The coil conductor 52 includes a portion extending in the second direction D2 and a portion extending in the third direction D3, and corresponds to approximately 3 / 4 turn of the coil 5. The coil conductor 52 has an end portion 52a exposed at the end surface 2d. The coil conductor 52 is directly connected to the electrode portion 41 of the external electrode 4. The end portion 52a is directly connected to the electrode portion 41. The coil conductor 52 is electrically connected to the external electrode 4. The coil conductor 52 also has an end portion connected to the via V2.

[0036] The coil conductor 53 includes a portion extending in the second direction D2 and a portion extending in the third direction D3, and corresponds to approximately 3 / 4 turn of the coil 5. The coil conductor 53 has an end connected to the via V1 and an end connected to the via V2. The coil conductor 53 is electrically connected to the external electrode 3 through the via V1 and the coil conductor 51. The coil conductor 53 is electrically connected to the external electrode 4 through the via V2 and the coil conductor 52. Therefore, the coil 5 is electrically connected to the two external electrodes 3 and 4. In this embodiment, the number of coil conductors 53 located between the coil conductor 51 and the coil conductor 52 is "1." The number of coil conductors 53 is not limited to the above-mentioned number. The number of coil conductors 53 may be more or less than the above-mentioned number.

[0037] The adjustment electrode 6 is disposed on the element body 2 and is spaced apart from the plurality of coil conductors 51, 52, and 53. The adjustment electrode 6 is spaced apart from the coil 5. The adjustment electrode 6 has a plurality of adjustment conductors 61, 62, 63, and 64. The adjustment electrode 6 has four adjustment conductors 61, 62, 63, and 64. The adjustment conductor 61 is disposed between the coil conductor 51 and the electrode portion 42. The adjustment conductor 62 is disposed between the coil conductor 52 and the electrode portion 33. The adjustment conductor 63 is disposed between the coil conductor 51 and the electrode portion 32. The adjustment conductor 64 is disposed between the coil conductor 52 and the electrode portion 43. The adjustment conductors 61, 62, 63, and 64 are spaced apart from one another. When viewed from the first direction D1, the adjustment conductors 61, 62, 63, and 64 have, for example, a rectangular shape. A rectangular shape includes a shape with rounded corners and a shape with rounded corners. The adjustment conductors 61, 62, 63, and 64 may have a shape other than a rectangular shape. The shapes of the adjustment conductors 61, 62, 63, and 64 may be the same or different from each other.

[0038] In this embodiment, the adjustment conductor 61 is directly connected to the electrode portion 42. The adjustment conductor 62 is directly connected to the electrode portion 33. The adjustment conductor 63 is directly connected to the electrode portion 32. The adjustment conductor 64 is directly connected to the electrode portion 43. The adjustment conductors 61 and 64 are electrically connected to the external electrode 4. The adjustment conductors 62 and 63 are electrically connected to the external electrode 3. For example, when adjustment conductor 61 constitutes a first main surface side adjustment conductor, adjustment conductor 62 constitutes a second main surface side adjustment conductor, adjustment conductor 63 constitutes another first main surface side adjustment conductor, and adjustment conductor 64 constitutes another second main surface side adjustment conductor.

[0039] As shown in FIGS. 1 to 4 , in this embodiment, the adjusting conductors 61 and 63 are arranged on the principal surface 2a, and the adjusting conductors 62 and 64 are arranged on the principal surface 2b. The adjusting conductor 61 is arranged on the principal surface 2a, closer to the end surface 2d. The adjusting conductor 62 is arranged on the principal surface 2b, closer to the end surface 2c. The adjusting conductor 63 is arranged on the principal surface 2a, closer to the end surface 2c. The adjusting conductor 64 is arranged on the principal surface 2b, closer to the end surface 2d. Therefore, the adjusting conductors 61 and 64 face each other in the first direction D1 with the element body 2 interposed therebetween. The adjusting conductors 62 and 63 face each other in the first direction D1 with the element body 2 interposed therebetween. The adjusting conductors 61 and 63 directly face each other in the second direction D2 on the principal surface 2a. The adjusting conductors 62 and 64 directly face each other in the second direction D2 on the principal surface 2b.

[0040] The adjustment electrode 6 has a plurality of adjustment conductors 65, a plurality of adjustment conductors 66, a plurality of adjustment conductors 67, and a plurality of adjustment conductors 68. Each of the adjustment conductors 65, 66, 67, and 68 is disposed within the element body 2. The number of each of the adjustment conductors 65, 66, 67, and 68 is "3." In FIG. 2, for the sake of explanation, the coil conductors 51, 52, and 53 and the adjustment conductors 66 and 68 are intentionally illustrated as being shifted from each other in the first direction D1. Each adjustment conductor 65 is located on the same layer as the corresponding coil conductors 51, 52, 53. Each adjustment conductor 65 is located between the corresponding coil conductor 51, 52, 53 and the electrode portion 34. Each adjustment conductor 65 is exposed at the end face 2c and the side face 2e. Each adjustment conductor 65 has an end exposed at the end face 2c and an end exposed at the side face 2e. Each adjustment conductor 65 is located at a corner of the element body 2 defined by the end face 2c and the side face 2e. Each adjustment conductor 66 is located on the same layer as the corresponding coil conductors 51, 52, 53. Each adjustment conductor 66 is located between the corresponding coil conductor 51, 52, 53 and the electrode portion 35. Each adjustment conductor 66 is exposed at the end face 2c and the side face 2f. Each adjustment conductor 66 has an end exposed at the end face 2c and an end exposed at the side face 2f. Each adjustment conductor 66 is located at a corner of the element body 2 defined by the end face 2c and the side face 2f.

[0041] Each adjustment conductor 67 is located on the same layer as the corresponding coil conductors 51, 52, 53. Each adjustment conductor 67 is located between the corresponding coil conductor 51, 52, 53 and the electrode portion 44. Each adjustment conductor 67 is exposed at the end face 2d and the side face 2e. Each adjustment conductor 67 has an end exposed at the end face 2d and an end exposed at the side face 2e. Each adjustment conductor 67 is located at a corner of the element body 2 defined by the end face 2d and the side face 2e. Each adjustment conductor 68 is located on the same layer as the corresponding coil conductors 51, 52, 53. Each adjustment conductor 68 is located between the corresponding coil conductor 51, 52, 53 and the electrode portion 45. Each adjustment conductor 68 is exposed on the end face 2d and the side face 2f. Each adjustment conductor 68 has an end exposed on the end face 2d and an end exposed on the side face 2f. Each adjustment conductor 68 is located at a corner of the element body 2 defined by the end face 2d and the side face 2f.

[0042] Each of the adjustment conductors 65, 66 has an end exposed on the end face 2c directly connected to the electrode portion 31. Each of the adjustment conductors 65 has an end exposed on the side face 2e directly connected to the electrode portion 34. Each of the adjustment conductors 66 has an end exposed on the side face 2f directly connected to the electrode portion 35. The adjustment conductors 65, 66 are electrically connected to the external electrode 3. Each of the adjustment conductors 67, 68 has an end exposed on the end face 2d directly connected to the electrode portion 41. Each of the adjustment conductors 67 has an end exposed on the side face 2e directly connected to the electrode portion 44. Each of the adjustment conductors 68 has an end exposed on the side face 2f directly connected to the electrode portion 45. The adjustment conductors 67, 68 are electrically connected to the external electrode 4. For example, when the adjustment conductors 65 and 66 constitute first side surface side adjustment conductors, the adjustment conductors 67 and 68 constitute second side surface side adjustment conductors.

[0043] When viewed from the first direction D1, each of the adjustment conductors 65, 66, 67, and 68 has, for example, a rectangular shape. A rectangular shape includes a shape with rounded corners and a shape with rounded corners. The adjustment conductor 65 may have an "L" shape. In a configuration in which the adjustment conductor 65 has an "L" shape, the adjustment conductor 65 has, for example, a portion extending along the end face 2c and a portion extending along the side face 2e. Similarly, each of the adjustment conductors 66, 67, and 68 may also have an "L" shape. The adjustment conductors 65 and 66 may be connected to each other by a conductor portion extending in the third direction D3. The adjustment conductors 67 and 68 may be connected to each other by a conductor portion extending in the third direction D3. The shapes of the adjustment conductors 65, 66, 67, and 68 may be the same or different from each other.

[0044] The method for forming each of the adjustment conductors 61, 62, 63, 64, 65, 66, 67, and 68, like the method for forming the multiple coil conductors 51, 52, and 53, includes patterning commonly used in the manufacturing process of electronic components. For example, the patterning may be a printing method, a transfer method, a photolithography method, or a semi-additive method. In this embodiment, the method for forming the multiple coil conductors 51, 52, and 53 and each of the adjustment conductors 61, 62, 63, 64, 65, 66, 67, and 68 includes a printing method. The printing method may include, for example, a screen printing method. The adjusting conductors 61, 62, 63, 64, 65, 66, 67, and 68 each include, for example, a conductive material. The conductive material may include, for example, Ag or Pd. The adjusting conductors 61, 62, 63, 64, 65, 66, 67, and 68 each may be formed as, for example, a sintered body of a conductive paste containing a conductive material. The conductive material may include, for example, Ag powder or Pd powder. The adjusting conductors 61, 62, 63, 64, 65, 66, 67, and 68 may each contain, for example, a metal oxide. The metal oxide may include, for example, TiO2, Al2O3, or ZrO2. In this case, the adjusting conductors 61, 62, 63, 64, 65, 66, 67, and 68 each may be formed as a sintered body of a conductive paste containing the metal oxide.

[0045] As shown in FIG. 4 , when the adjustment conductor 61 and the electrode portion 42 are viewed in the first direction D1, from the principal surface 2a to the principal surface 2b, the adjustment conductor 61 is exposed from the edge 42a of the electrode portion 42. The direction from the principal surface 2a to the principal surface 2b in the first direction D1 includes a direction perpendicular to the principal surface 2a. When viewed in the direction perpendicular to the principal surface 2a, the adjustment conductor 61 includes a portion 61a that overlaps with the electrode portion 42 and a portion 61b that is exposed from the electrode portion 42. The portion 61a of the adjustment conductor 61 overlaps with the entire electrode portion 42. The portion 61b of the adjustment conductor 61 does not overlap with the electrode portion 42. The portion 61a of the adjustment conductor 61 is exposed from the entire edge 42a of the electrode portion 42. The length of the adjustment conductor 61 in the second direction D2 is greater than the length of the electrode portion 42 in the second direction D2. The adjustment conductor 61 has a portion that overlaps with a part of the coil conductor 51 in the first direction D1. When the adjustment conductor 63 and the electrode portion 32 are viewed in the first direction D1, from the principal surface 2a toward the principal surface 2b, the adjustment conductor 63 is exposed from the edge 32a of the electrode portion 32. When viewed in a direction perpendicular to the principal surface 2a, the adjustment conductor 63 includes a portion 63a that overlaps with the electrode portion 32 and a portion 63b that is exposed from the electrode portion 32. The portion 63a of the adjustment conductor 63 overlaps with the entire electrode portion 32. The portion 63b of the adjustment conductor 63 does not overlap with the electrode portion 32. The portion 63a of the adjustment conductor 63 is exposed from the entire edge 32a of the electrode portion 32. The length of the adjustment conductor 63 in the second direction D2 is greater than the length of the electrode portion 32 in the second direction D2. The adjustment conductor 63 has a portion that overlaps with a part of the coil conductor 51 in the first direction D1.

[0046] As shown in FIG. 5 , when the adjustment conductor 62 and the electrode portion 33 are viewed in the first direction D1, from the principal surface 2b toward the principal surface 2a, the adjustment conductor 62 is exposed from the edge 33a of the electrode portion 33. The direction from the principal surface 2b toward the principal surface 2a in the first direction D1 includes a direction perpendicular to the principal surface 2b. When viewed in the direction perpendicular to the principal surface 2b, the adjustment conductor 62 includes a portion 62a that overlaps with the electrode portion 33 and a portion 62b that is exposed from the electrode portion 33. The portion 62a of the adjustment conductor 62 overlaps with the entire electrode portion 33. The portion 62b of the adjustment conductor 62 does not overlap with the electrode portion 33. The portion 62a of the adjustment conductor 62 is exposed from the entire edge 33a of the electrode portion 33. The length of the adjustment conductor 62 in the second direction D2 is greater than the length of the electrode portion 33 in the second direction D2. The adjustment conductor 62 has a portion that overlaps with a portion of the coil conductor 52 in the first direction D1. When the adjustment conductor 64 and electrode portion 43 are viewed in the first direction D1, from the principal surface 2b toward the principal surface 2a, the adjustment conductor 64 is exposed from the edge 43a of the electrode portion 43. When viewed in a direction perpendicular to the principal surface 2b, the adjustment conductor 64 includes a portion 64a that overlaps with the electrode portion 43 and a portion 64b that is exposed from the electrode portion 43. The portion 64a of the adjustment conductor 64 overlaps the entire electrode portion 43. The portion 64b of the adjustment conductor 64 does not overlap with the electrode portion 43. The portion 64a of the adjustment conductor 64 is exposed from the entire edge 43a of the electrode portion 43. The length of the adjustment conductor 64 in the second direction D2 is greater than the length of the electrode portion 43 in the second direction D2. The adjustment conductor 64 has a portion that overlaps with a part of the coil conductor 52 in the first direction D1.

[0047] The length of each of the adjustment conductors 61, 62, 63, and 64 in the second direction D2 is, for example, 0.05 mm or more and 0.5 mm or less. In this embodiment, the length of each of the adjustment conductors 61, 62, 63, and 64 in the second direction D2 is 0.1 mm. The lengths of the adjustment conductors 61, 62, 63, and 64 in the second direction D2 may be equal to or different from each other.

[0048] As shown in FIG. 6 , when the adjustment conductor 65 and the electrode portion 34 are viewed in a direction perpendicular to the side surface 2e, the adjustment conductor 65 is exposed from the edge 34a of the electrode portion 34. When viewed in a direction perpendicular to the side surface 2e, the adjustment conductor 65 includes a portion 65a that overlaps with the electrode portion 34 and a portion 65b that is exposed from the electrode portion 34. The portion 65b of the adjustment conductor 65 does not overlap with the electrode portion 34. The portion 65a of the adjustment conductor 65 is exposed from the entire edge 34a of the electrode portion 34. The length of the adjustment conductor 65 in the second direction D2 is greater than the length of the electrode portion 34 in the second direction D2. Each adjustment conductor 65 has a portion that overlaps with a part of the corresponding coil conductor 51, 52, 53 in the third direction D3. When the adjustment conductor 67 and electrode portion 44 are viewed in a direction perpendicular to the side surface 2e, the adjustment conductor 67 is exposed from the edge 44a of the electrode portion 44. When viewed in a direction perpendicular to the side surface 2e, the adjustment conductor 67 includes a portion 67a that overlaps with the electrode portion 44 and a portion 67b that is exposed from the electrode portion 44. The portion 67b of the adjustment conductor 67 does not overlap with the electrode portion 44. The portion 67a of the adjustment conductor 67 is exposed from the entire edge 44a of the electrode portion 44. The length of the adjustment conductor 67 in the second direction D2 is greater than the length of the electrode portion 44 in the second direction D2. Each adjustment conductor 67 has a portion that overlaps with a part of the corresponding coil conductor 51, 52, 53 in the third direction D3.

[0049] As shown in FIG. 7 , when the adjustment conductor 66 and the electrode portion 35 are viewed in a direction perpendicular to the side surface 2f, the adjustment conductor 66 is exposed from the edge 35a of the electrode portion 35. When viewed in a direction perpendicular to the side surface 2f, the adjustment conductor 66 includes a portion 66a that overlaps with the electrode portion 35 and a portion 66b that is exposed from the electrode portion 35. The portion 66b of the adjustment conductor 66 does not overlap with the electrode portion 35. The portion 66a of the adjustment conductor 66 is exposed from the entire edge 35a of the electrode portion 35. The length of the adjustment conductor 66 in the second direction D2 is greater than the length of the electrode portion 35 in the second direction D2. Each adjustment conductor 66 has a portion that overlaps with a part of the corresponding coil conductor 51, 52, 53 in the third direction D3. When the adjustment conductor 68 and electrode portion 45 are viewed in a direction perpendicular to the side surface 2f, the adjustment conductor 68 is exposed from the edge 45a of the electrode portion 45. When viewed in a direction perpendicular to the side surface 2f, the adjustment conductor 68 includes a portion 68a that overlaps with the electrode portion 45 and a portion 68b that is exposed from the electrode portion 45. The portion 68b of the adjustment conductor 68 does not overlap with the electrode portion 45. The portion 68a of the adjustment conductor 68 is exposed from the entire edge 45a of the electrode portion 45. The length of the adjustment conductor 68 in the second direction D2 is greater than the length of the electrode portion 45 in the second direction D2. Each adjustment conductor 68 has a portion that overlaps with a part of the corresponding coil conductor 51, 52, 53 in the third direction D3.

[0050] The length of each of the adjustment conductors 65, 66, 67, and 68 in the second direction D2 is, for example, 0.05 mm or more and 0.5 mm or less. In this embodiment, the length of each of the adjustment conductors 65, 66, 67, and 68 in the second direction D2 is 0.1 mm. The lengths of the adjustment conductors 65, 66, 67, and 68 in the second direction D2 may be equal to or different from each other.

[0051] As described above, in the filter component FC1, when the adjustment conductor 61 and the electrode portion 42 are viewed in the first direction D1, that is, from the principal surface 2a toward the principal surface 2b, the adjustment conductor 61 is exposed from the edge 42a of the electrode portion 42. Therefore, stray capacitance is unlikely to occur between the coil conductor 51 and the electrode portion 42, but is likely to occur between the coil conductor 51 and the adjustment conductor 61.

[0052] The adjustment conductor 61 may be formed by a method different from that for the external electrodes 3 and 4. For example, the adjustment conductor 61 may be formed by the above-described method for forming the multiple coil conductors 51, 52, and 53. Therefore, the position and size of the adjustment conductor 61 are unlikely to vary. Therefore, the stray capacitance generated between the coil conductor 51 and the adjustment conductor 61 is unlikely to vary. In the filter component FC1, even if the lengths of the electrode portions 42 in the second direction D2 vary, the variation in the lengths of the electrode portions 42 in the second direction D2 is unlikely to affect the stray capacitance generated in the coil conductor 51. As a result, the stray capacitance generated in the coil conductor 51 is unlikely to vary, and the self-resonant frequency is unlikely to vary. The filter component FC1 can suppress variation in the self-resonant frequency.

[0053] When the adjustment conductor 62 and the electrode portion 33 are viewed in the first direction D1, from the principal surface 2b toward the principal surface 2a, the adjustment conductor 62 is exposed from the edge 33a of the electrode portion 33. Therefore, stray capacitance is unlikely to occur between the coil conductor 52 and the electrode portion 33, but is likely to occur between the coil conductor 52 and the adjustment conductor 62.

[0054] The adjustment conductor 62 may be formed by a method different from that of the external electrodes 3 and 4. For example, the adjustment conductor 62 may be formed by the same method as the above-described method for forming the multiple coil conductors 51, 52, and 53. Therefore, the position and size of the adjustment conductor 62 are unlikely to vary. Therefore, the stray capacitance generated between the coil conductor 52 and the adjustment conductor 62 is unlikely to vary. In the filter component FC1, even if the lengths of the electrode portions 33 in the second direction D2 vary, the variation in the lengths of the electrode portions 33 in the second direction D2 is unlikely to affect the stray capacitance generated in the coil conductor 52. As a result, the stray capacitance generated in the coil conductor 52 is unlikely to vary, and the self-resonant frequency is even less likely to vary. The filter component FC1 can further suppress variation in the self-resonant frequency.

[0055] When the adjustment conductor 63 and the electrode portion 32 are viewed in the first direction D1, from the principal surface 2a toward the principal surface 2b, the adjustment conductor 63 is exposed from the edge 32a of the electrode portion 32. Therefore, in the filter component FC1, stray capacitance is unlikely to occur between the coil conductor 51 and the electrode portion 32, but is likely to occur between the adjustment conductor 63 and the coil conductor 51. When the adjustment conductor 64 and the electrode portion 43 are viewed in the first direction D1, from the principal surface 2b toward the principal surface 2a, the adjustment conductor 64 is exposed from the edge 43a of the electrode portion 43. Therefore, in the filter component FC1, stray capacitance is unlikely to occur between the coil conductor 52 and the electrode portion 43, but is likely to occur between the adjustment conductor 64 and the coil conductor 52.

[0056] The adjustment conductors 63, 64 may be formed by a method different from that for the external electrodes 3, 4. For example, the adjustment conductors 63, 64 may be formed by the same method as the above-described method for forming the multiple coil conductors 51, 52, 53. Therefore, the position and size of the adjustment conductors 63, 64 are unlikely to vary. Therefore, the stray capacitance generated between the adjustment conductor 63 and the coil conductor 51 and the stray capacitance generated between the adjustment conductor 64 and the coil conductor 52 are unlikely to vary. In the filter component FC1, even if the lengths of the electrode portions 32, 43 in the second direction D2 vary, the variation in the lengths of the electrode portions 32, 43 in the second direction D2 is unlikely to affect the stray capacitance generated in the coil conductors 51, 52. As a result, the stray capacitance generated in the coil conductors 51, 52 is unlikely to vary, and the self-resonant frequency is even less likely to vary. Therefore, the filter component FC1 can further suppress variation in the self-resonant frequency.

[0057] When the adjustment conductor 65 and the electrode portion 34 are viewed in a direction perpendicular to the side surface 2e, the adjustment conductor 65 is exposed from the edge 34a of the electrode portion 34. Therefore, in the filter component FC1, stray capacitance is unlikely to occur between the coil conductors 51, 52, 53 and the electrode portion 34, but is likely to occur between the coil conductors 51, 52, 53 and the adjustment conductor 65. When the adjustment conductor 67 and the electrode portion 44 are viewed in a direction perpendicular to the side surface 2e, the adjustment conductor 67 is exposed from the edge 44a of the electrode portion 44. Therefore, in the filter component FC1, stray capacitance is unlikely to occur between the coil conductors 51, 52, 53 and the electrode portion 44, but is likely to occur between the coil conductors 51, 52, 53 and the adjustment conductor 67. When the adjustment conductor 66 and the electrode portion 35 are viewed in a direction perpendicular to the side surface 2f, the adjustment conductor 66 is exposed from the edge 35a of the electrode portion 35. Therefore, in the filter component FC1, stray capacitance is unlikely to occur between the coil conductors 51, 52, 53 and the electrode portion 35, but is likely to occur between the coil conductors 51, 52, 53 and the adjustment conductor 66. When the adjustment conductor 68 and the electrode portion 45 are viewed in a direction perpendicular to the side surface 2f, the adjustment conductor 68 is exposed from the edge 45a of the electrode portion 45. Therefore, in the filter component FC1, stray capacitance is unlikely to occur between the coil conductors 51, 52, 53 and the electrode portion 45, but is likely to occur between the coil conductors 51, 52, 53 and the adjustment conductor 68.

[0058] Each of the multiple adjustment conductors 65, 66, 67, and 68 may be formed by a method different from that of the external electrodes 3 and 4. For example, each of the multiple adjustment conductors 65, 66, 67, and 68 may be formed by the same method as the above-described method for forming the multiple coil conductors 51, 52, and 53. Therefore, the position and size of each of the multiple adjustment conductors 65, 66, 67, and 68 are unlikely to vary. Therefore, the stray capacitance generated between the corresponding coil conductors 51, 52, and 53 and the adjustment conductors 65, 66, 67, and 68 is unlikely to vary. In the filter component FC1, even if the lengths of the electrode portions 34, 35, 44, and 45 in the second direction D2 vary, the variation in the lengths of the electrode portions 34, 35, 44, and 45 in the second direction D2 is unlikely to affect the stray capacitance generated in the coil conductors 51, 52, and 53. As a result, the stray capacitance generated in the coil conductors 51, 52, and 53 is unlikely to vary, and the self-resonant frequency is even less likely to vary. Therefore, the filter component FC1 can further suppress variation in the self-resonant frequency.

[0059] The configuration of a filter component FC2 according to a first modified example of this embodiment will be described with reference to Fig. 8. Fig. 8 is a diagram showing a cross-sectional configuration of the filter component according to the first modified example. The filter component FC2 according to the first modified example is generally similar to or the same as the filter component FC1 described above. However, the filter component FC2 differs from the filter component FC1 in the configuration of the adjustment electrode 6. The following mainly describes the differences between the filter component FC2 and the filter component FC1.

[0060] As shown in Fig. 8, in the filter component FC2, the adjustment conductors 61, 62, 63, and 64 are disposed within the element body 2. The adjustment conductors 61 and 63 are located between the principal surface 2a and the coil conductor 51. The adjustment conductors 62 and 64 are located between the principal surface 2b and the coil conductor 52. For ease of explanation, Fig. 8 intentionally illustrates the coil conductors 51, 52, and 53 and the adjustment conductors 66 and 68 as being shifted from each other in the first direction D1. In the filter component FC2, the distance between each of the adjustment conductors 61, 63 and the coil conductor 51 can be reduced, and the distance between each of the adjustment conductors 62, 64 and the coil conductor 52 can be reduced. Therefore, stray capacitance can be reliably generated between each of the adjustment conductors 61, 63 and the coil conductor 51, and between each of the adjustment conductors 62, 64 and the coil conductor 52. As a result, the filter component FC2 can easily adjust the value of the stray capacitance generated in the coil 5.

[0061] The configuration of a filter component FC3 according to a second modified example of this embodiment will be described with reference to Figs. 9 and 10. Fig. 9 is a diagram showing a cross-sectional configuration of the filter component according to the second modified example. Fig. 10 is an exploded perspective view of the filter component according to the second modified example. The filter component FC3 according to the second modified example is generally similar to or the same as the filter component FC1 described above. However, the filter component FC3 differs from the filter component FC1 in the configuration of the adjustment electrode 6. The following mainly describes the differences between the filter component FC3 and the filter component FC1.

[0062] 9 and 10 , the adjustment electrode 6 includes an adjustment conductor 61 and an adjustment conductor 62. The adjustment conductor 61 is located on the principal surface 2a, and the adjustment conductor 62 is located on the principal surface 2b. In the filter component FC3, the adjustment electrode 6 does not include the adjustment conductors 63 and 64. The adjustment electrode 6 also has adjustment conductors 65, 66, 67, and 68. Only the adjustment conductors 67 and 68 are arranged on the same layer as the coil conductor 51. The adjustment conductors 65 and 66 are not arranged on the same layer as the coil conductor 51. Only the adjustment conductors 65 and 66 are arranged on the same layer as the coil conductor 52. The adjustment conductors 67 and 68 are not arranged on the same layer as the coil conductor 52. The adjustment conductors 65, 66, 67, and 68 are arranged on the same layer as the coil conductor 53. 9, for ease of explanation, the coil conductors 51, 52, and 53 and the adjustment conductors 66 and 68 are intentionally shown shifted from one another in the first direction D1. In FIG. 10, the external electrodes 3 and 4 are not shown.

[0063] The configuration of a filter component FC4 according to a third modified example of this embodiment will be described with reference to Fig. 11. Fig. 11 is a diagram showing a cross-sectional configuration of the filter component according to the third modified example. The filter component FC4 according to the third modified example is generally similar to or the same as the filter component FC3 described above. However, the filter component FC4 differs from the filter component FC3 in the configuration of the adjustment electrode 6. The following mainly describes the differences between the filter component FC4 and the filter component FC3.

[0064] 11 , in the filter component FC4, the adjustment conductors 61 and 62 are disposed within the element body 2. The adjustment conductor 61 is located between the principal surface 2a and the coil conductor 51. The adjustment conductor 62 is located between the principal surface 2b and the coil conductor 52. In the filter component FC4, the distance between the adjustment conductor 61 and the coil conductor 51 can be reduced, and the distance between the adjustment conductor 62 and the coil conductor 52 can be reduced. Therefore, stray capacitance can be reliably generated between the adjustment conductor 61 and the coil conductor 51 and between the adjustment conductor 62 and the coil conductor 52. As a result, the filter component FC4 can easily adjust the value of the stray capacitance generated in the coil 5. In FIG. 11, for the sake of explanation, the coil conductors 51, 52, and 53 and the adjustment conductors 66 and 68 are intentionally illustrated as being shifted from one another in the first direction D1.

[0065] The configuration of a filter component FC5 according to a fourth modified example of this embodiment will be described with reference to Figs. 12 and 13. Fig. 12 is a diagram showing a cross-sectional configuration of the filter component according to the fourth modified example. Fig. 13 is an exploded perspective view of the filter component according to the fourth modified example. The filter component FC5 according to the fourth modified example is generally similar to or the same as the filter component FC1 described above. However, the filter component FC5 differs from the filter component FC1 in the configurations of the external electrodes 3 and 4 and the adjustment electrode 6. The following mainly describes the differences between the filter component FC5 and the filter component FC1.

[0066] 12, in the filter component FC5, the external electrode 3 has electrode portion 31 and electrode portion 32, and the external electrode 4 has electrode portion 41 and electrode portion 42. The external electrode 3 does not have electrode portions 33, 34, or 35, and the external electrode 4 does not have electrode portions 43, 44, or 45. The external electrode 3 is formed substantially only on the main surface 2a and the end surface 2c. The external electrode 4 is formed substantially only on the main surface 2a and the end surface 2d. The main surface 2b and the pair of side surfaces 2e and 2f are not covered by the external electrodes 3 and 4. The adjustment electrode 6 has an adjustment conductor 61. In the filter component FC5, the adjustment electrode 6 does not have the adjustment conductors 62, 63, 64. The adjustment electrode 6 also does not have the adjustment conductors 65, 66, 67, 68. The adjustment conductor 61 is located on the main surface 2a.

[0067] The above describes an embodiment and several modified examples of the present invention, but the present invention is not necessarily limited to the above-described embodiment and several modified examples, and various modifications are possible within the scope of the gist of the present invention.

[0068] The filter components FC1, FC2, FC3, and FC4 do not necessarily have to include the adjusting conductors 65, 66, 67, and 68. In a configuration including the adjusting conductors 65, 66, 67, and 68, as described above, the variation in the self-resonant frequency can be further suppressed. The shape of the coil 5 (coil conductors 51, 52, 53) is not limited to the shapes disclosed in the above-described embodiment and each modified example.

[0069] The surfaces of the external electrodes 3 and 4 may be covered with a plating layer. In a configuration in which the surfaces of the external electrodes 3 and 4 are covered with a plating layer, the portions 61b, 62b, 63b, and 63b of the adjustment conductors 61, 62, 63, and 64 may also be covered with a plating layer. Similarly, the portions 65b, 66b, 67b, and 68b of the adjustment conductors 65, 66, 67, and 68 may also be covered with a plating layer. Each of the external electrodes 3, 4 may include a conductive resin layer, which is formed, for example, by applying a conductive resin paste by a dipping method and then curing the applied conductive resin paste. [Explanation of symbols]

[0070] 2...element body, 2a, 2b...main surfaces, 2c, 2d...end surfaces, 2e, 2f...side surfaces, 3, 4...external electrodes, 5...coil, 6...adjusting electrodes, 31-35, 41-45...electrode portions, 32a-35a, 42a-45a...edges, 51, 52, 53...coil conductors, 61-68...adjusting conductors, D1...first direction, D2...second direction, D3...third direction, FC1-FC5...filter components.

Claims

1. an element body having a rectangular parallelepiped shape, the element body having a first main surface constituting a mounting surface, a second main surface facing the first main surface in a first direction, and first and second end surfaces facing each other in a second direction; first and second external electrodes disposed at both ends of the element body in the second direction; a plurality of coil conductors disposed within the element body and electrically connected to one another; an adjustment electrode disposed on the element body and spaced apart from the plurality of coil conductors; the first external electrode has a first end surface electrode portion located on the first end surface and a first main surface electrode portion located on the first main surface, the second external electrode has a second end surface electrode portion located on the second end surface and a second main surface electrode portion located on the first main surface, the plurality of coil conductors include a first coil conductor adjacent to the first principal surface in the first direction and electrically connected to the first end surface electrode portion, and a second coil conductor adjacent to the second principal surface in the first direction and electrically connected to the second end surface electrode portion, the adjustment electrode has a first principal surface side adjustment conductor located between the first coil conductor and the second principal surface electrode portion and electrically connected to the second external electrode, the first-principal-surface-side adjustment conductor is disposed within the element body between the first coil conductor and the first principal surface, when the first principal surface side adjustment conductor and the second principal surface electrode portion are viewed in a direction from the first principal surface toward the second principal surface in the first direction, the first principal surface side adjustment conductor is exposed from an edge of the second principal surface electrode portion and includes a portion overlapping with the second principal surface electrode portion and a portion exposed from the second principal surface electrode portion, a length in the second direction of the portion of the first principal surface side adjustment conductor that is exposed from the second principal surface electrode portion is shorter than a length in the second direction of the portion of the first principal surface side adjustment conductor that overlaps with the second principal surface electrode portion.

2. the first external electrode further includes a third principal surface electrode portion located on the second principal surface, the second external electrode further includes a fourth principal surface electrode portion located on the second principal surface, the adjusting electrode further includes a second-principal-surface-side adjusting conductor located between the second coil conductor and the third-principal-surface electrode portion and electrically connected to the first external electrode, the second-principal-surface-side adjustment conductor is disposed within the element body between the second coil conductor and the second principal surface, when the second principal surface side adjustment conductor and the third principal surface electrode portion are viewed in a direction from the second principal surface toward the first principal surface, among the first directions, the second principal surface side adjustment conductor is exposed from an edge of the third principal surface electrode portion and includes a portion overlapping with the third principal surface electrode portion and a portion exposed from the third principal surface electrode portion, 2. The filter component according to claim 1, wherein a length in the second direction of the portion of the second principal surface side adjustment conductor that is exposed from the third principal surface electrode portion is shorter than a length in the second direction of the portion of the second principal surface side adjustment conductor that overlaps with the third principal surface electrode portion.

3. The adjustment electrode is another first-principal-surface-side adjusting conductor located between the first coil conductor and the first-principal-surface electrode portion and electrically connected to the first external electrode; a second main surface side adjusting conductor located between the second coil conductor and the fourth main surface electrode portion and electrically connected to the second external electrode, the other first-principal-surface-side adjustment conductor is disposed within the element body between the first coil conductor and the first principal surface, the other second-principal-surface-side adjusting conductor is disposed within the element body between the second coil conductor and the second principal surface, when the another first-principal-surface-side adjusting conductor and the first-principal-surface electrode portion are viewed in the direction from the first principal surface toward the second principal surface, among the first directions, the another first-principal-surface-side adjusting conductor is exposed from an edge of the first principal-surface electrode portion and includes a portion overlapping with the first principal-surface electrode portion and a portion exposed from the first principal-surface electrode portion, when the another second principal surface side adjusting conductor and the fourth principal surface electrode portion are viewed in the direction from the second principal surface toward the first principal surface, among the first directions, the another second principal surface side adjusting conductor is exposed from an edge of the fourth principal surface electrode portion and includes a portion overlapping with the fourth principal surface electrode portion and a portion exposed from the fourth principal surface electrode portion, a length in the second direction of the portion of the another first principal surface side adjusting conductor that is exposed from the first principal surface electrode portion is shorter than a length in the second direction of the portion of the another first principal surface side adjusting conductor that overlaps with the first principal surface electrode portion; 3. The filter component according to claim 2, wherein a length in the second direction of the portion of the another second-principal-surface-side adjusting conductor that is exposed from the fourth principal-surface electrode portion is shorter than a length in the second direction of the portion of the another second-principal-surface-side adjusting conductor that overlaps with the fourth principal-surface electrode portion.

4. the element body further has a pair of side surfaces facing each other in a third direction, the first external electrode further includes a pair of first side electrode portions located on the pair of side surfaces, the second external electrode further includes a pair of second side surface electrode portions located on the pair of side surfaces, The adjustment electrode is a pair of first side surface side adjustment conductors that are in the same layer as the plurality of coil conductors, that are located between corresponding ones of the plurality of coil conductors and the pair of first side surface electrode portions, and that are electrically connected to the first external electrode; a pair of second side surface side adjustment conductors that are in the same layer as the plurality of coil conductors, that are located between corresponding ones of the plurality of coil conductors and the pair of second side surface electrode portions, and that are electrically connected to the second external electrode, when the first side surface side adjustment conductor and the first side surface electrode portion corresponding to each other are viewed in a direction perpendicular to the corresponding side surface of the pair of side surfaces, the first side surface side adjustment conductor is exposed from an edge of the first side surface electrode portion, The filter component according to any one of claims 1 to 3, wherein when the corresponding second side surface side adjustment conductor and the second side surface electrode portion are viewed in a direction perpendicular to the corresponding one of the pair of side surfaces, the second side surface side adjustment conductor is exposed from an edge of the second side surface electrode portion.

5. each of the pair of first side surface side adjustment conductors is located within the element body and is exposed at the first end surface and the corresponding side surface; The filter component according to claim 4 , wherein each of the pair of second side surface side adjustment conductors is located within the element body and is exposed at the second end surface and the corresponding side surface.

Images