JP2023134342A - Lamination coil component - Google Patents

Abstract

To provide a lamination coil component capable of controlling an own resonance frequency.SOLUTION: A lamination coil component comprises: an element body; a first outer electrode; a second outer electrode; a coil 3; a first connection conductor; and a connection conductor 52. The connection conductor 52 connects the second outer electrode with an end 34 of the coil 3. A plurality of pad conductors 53 and a plurality of through hole conductors 54 of a second connection conductor are alternately arranged to a direction D1 crossed to a main surface, and are separated from the coil 3. Each of the plurality of pad conductors 53 includes: a part 53a; and a part 53b. The part 53a is overlapped with a whole of connection ends 54a of the adjacent through hole conductors 54 of the plurality of through hole conductors 54. The part 53b is continued to the part 53a, and is separated from the coil 3 from the part 53a.SELECTED DRAWING: Figure 4

Description

The present disclosure relates to laminated coil components.

A known laminated coil component includes an element body, a first external electrode, a second external electrode, a coil, a first connecting conductor, and a second connecting conductor (for example, Patent Document 1). The element body has a main surface that constitutes a mounting surface. The first external electrode and the second external electrode are arranged on the main surface and spaced apart from each other. The coil is arranged inside the element body along a direction in which the coil axis intersects the main surface. The coil has a first end and a second end that is further away from the main surface than the first end. The first connection conductor connects the first external electrode and the first end. The second connection conductor connects the second external electrode and the second end.

JP2019-016642A

One aspect of the present invention aims to provide a laminated coil component whose self-resonant frequency can be controlled.

A laminated coil component according to one aspect of the present invention includes an element body, a first external electrode, a second external electrode, a coil, a first connecting conductor, and a second connecting conductor. The element body has a main surface that constitutes a mounting surface. The first external electrode and the second external electrode are arranged on the main surface and spaced apart from each other. The coil is arranged inside the element body along a direction in which the coil axis intersects the main surface. The coil has a first end and a second end that is further away from the main surface than the first end. The first connection conductor connects the first external electrode and the first end. The second connection conductor connects the second external electrode and the second end. The second connection conductor has a plurality of pad conductors and a plurality of through-hole conductors. The plurality of pad conductors and the plurality of through-hole conductors are arranged alternately in a direction crossing the main surface and are spaced apart from the coil. Each of the plurality of through-hole conductors has a connection end. The connection end is connected to an adjacent pad conductor among the plurality of pad conductors. Each of the plurality of pad conductors has a first portion and a second portion. The first portion overlaps the entire connecting end of an adjacent through-hole conductor among the plurality of through-hole conductors. The second portion is continuous with the first portion and is further spaced from the coil than the first portion.

In one aspect, each of the plurality of pad conductors has a first portion and a second portion continuous with the first portion. The first portion overlaps the entire connecting end of an adjacent through-hole conductor among the plurality of through-hole conductors, and is spaced apart from the coil. The second portion is further spaced from the coil than the first portion. Therefore, the spacing between each pad conductor and the coil is easily adjusted by the second part. As a result, in the above embodiment, the second portion adjusts the stray capacitance generated between each pad conductor and the coil, so that the self-resonant frequency can be controlled.

In one aspect, the second portion may be formed to extend from the first portion in a direction away from the coil.
In a configuration in which the second portion extends from the first portion in a direction away from the coil, stray capacitance generated between each pad conductor and the coil can be adjusted depending on the direction in which the second portion extends.

In one aspect of the above, in the second portion, the distance between the coil and the second portion may be larger as the distance from the first portion increases.
In a configuration where the distance between the coil and the second part is larger at a position where the distance from the first part is greater in the second part, the stray capacitance generated between each pad conductor and the coil depending on the length of the second part. can be adjusted.

In one aspect of the invention, the width of the second portion in the direction defining the shortest distance between the coil and the second portion may be smaller at a position farther from the first portion than at a position closer to the first portion.
In a configuration in which the width of the second portion in the direction that defines the shortest distance between the coil and the second portion is smaller at a position away from the first portion than at a position close to the first portion, the width of the second portion determines the distance between each pad conductor and the coil. The stray capacitance that occurs between the two can be adjusted.

In one aspect, each of the plurality of pad conductors may further include a third portion spaced apart from the second portion. The third portion may be continuous with the first portion and may be further spaced from the coil than the first portion.
In one aspect, the first portion overlaps the entire connecting end of an adjacent through-hole conductor among the plurality of through-hole conductors and is spaced apart from the coil. The third portion is further spaced from the coil than the first portion. Therefore, the spacing between each pad conductor and the coil is more easily adjusted by the third part. As a result, in a configuration in which the third portion of each of the plurality of pad conductors is further away from the coil than the first portion, the stray capacitance generated between each pad conductor and the coil is adjusted by the third portion. Therefore, the self-resonant frequency can be controlled.

In one aspect, the third portion may be formed to extend from the first portion in a direction away from the coil.
In a configuration in which the third portion extends from the first portion in a direction away from the coil, the stray capacitance generated between each pad conductor and the coil can be adjusted depending on the direction in which the third portion extends.

In one aspect, in the third portion, the distance between the coil and the third portion may be larger as the distance from the first portion increases.
In a configuration where the distance between the coil and the third part is larger at a position where the distance from the first part is greater in the third part, the stray capacitance generated between each pad conductor and the coil depending on the length of the third part is can be adjusted.

In one aspect, the width of the third portion in the direction defining the shortest distance between the coil and the third portion may be smaller at a position farther from the first portion than at a position closer to the first portion.
In a configuration in which the width of the third portion in the direction defining the shortest distance between the coil and the third portion is smaller at a position away from the first portion than at a position close to the first portion, the width of the third portion determines the distance between each pad conductor and the coil. The stray capacitance that occurs between the two can be adjusted.

One aspect of the present invention provides a laminated coil component whose self-resonant frequency can be controlled.

FIG. 1 is a perspective view showing a laminated coil component according to one embodiment. FIG. 2 is a perspective view showing the inside of the element body of the laminated coil component according to the present embodiment. FIG. 3 is a side view showing the inside of the element body of the laminated coil component according to this embodiment. FIG. 4 is an exploded plan view of a part of the laminated coil component according to this embodiment. FIG. 5 is a plan view of the pad conductor according to this embodiment. FIG. 6 is a diagram showing the frequency characteristics of the laminated coil component according to this embodiment.

Embodiments according to the present disclosure will be described below with reference to the drawings. In the description of the drawings, the same or corresponding elements are denoted by the same reference numerals, and redundant description will be omitted as appropriate.

The configuration of the laminated coil component 1 according to this embodiment will be described with reference to FIGS. 1 to 4. FIG. 1 is a perspective view showing a laminated coil component 1 according to this embodiment. FIG. 2 is a perspective view showing the inside of the element body 2 of the laminated coil component according to this embodiment. FIG. 3 is a side view showing the inside of the element body 2 of the laminated coil component 1 according to the present embodiment. FIG. 4 is an exploded plan view of a part of the laminated coil component 1 according to this embodiment. The laminated coil component 1 is soldered and mounted on an electronic device. Electronic equipment includes, for example, circuit boards or electronic components.

As shown in FIGS. 1 to 4, the laminated coil component 1 includes an element body 2 having a rectangular parallelepiped shape, a coil 3 disposed inside the element body 2, and an external electrode 41 and an external electrode 42. , a connecting conductor 51 and a connecting conductor 52 arranged inside the element body 2. The rectangular parallelepiped shape includes a rectangular parallelepiped shape with chamfered corners and edge lines, and a rectangular parallelepiped shape with rounded corners and edge lines.

The element body 2 has a pair of main surfaces 2a facing each other, a pair of side faces 2b facing each other, and a pair of side faces 2c facing each other. The main surface 2a and each side surface 2b, 2c have a rectangular shape. The main surface 2a and the side surface 2b are adjacent to each other. The main surface 2a and the side surface 2c are adjacent to each other.

A direction D1 in which the pair of main surfaces 2a face each other intersects each main surface 2a. In this embodiment, the direction D1 is perpendicular to each main surface 2a. The direction D1 is perpendicular to the direction D2 in which the pair of side surfaces 2b face each other. The direction D2 is orthogonal to each side surface 2b. A direction D3 in which the pair of side surfaces 2c faces each other is perpendicular to each side surface 2c and parallel to each main surface 2a and each side surface 2b. Direction D3 is orthogonal to direction D1 and direction D2.

As shown in FIG. 1, the external electrode 41 and the external electrode 42 are arranged on one main surface 2aa. That is, the pair of main surfaces 2a includes one main surface 2aa. External electrode 41 and external electrode 42 are spaced apart from each other. As an example, the external electrode 41 and the external electrode 42 are spaced apart from each other in the direction D2. Each of the external electrodes 41 and 42 has a rectangular shape when viewed from the direction D1, for example. In the laminated coil component 1, one main surface 2aa on which the external electrodes 41 and 42 are arranged constitutes a mounting surface facing an electronic device. That is, one main surface 2aa is arranged so as to constitute a mounting surface. A plating layer is formed on each surface of the external electrode 41 and the external electrode 42. The plating layer is formed, for example, by electroplating or electroless plating. The plating layer contains, for example, Ni, Sn, or Au. For example, when the external electrode 41 constitutes the first external electrode, the external electrode 42 constitutes the second external electrode.

As shown in FIGS. 3 and 4, the element body 2 is composed of a plurality of stacked insulator layers 21. As shown in FIGS. The element body 2 has a plurality of stacked insulator layers 21. In the element body 2, the direction in which the plurality of insulator layers 21 are stacked coincides with the direction D1. In the actual element body 2, the insulator layers 21 are integrated to such an extent that the boundaries between the insulator layers 21 cannot be visually recognized. Each insulator layer 21 is made of, for example, a magnetic material. The magnetic material includes, for example, a Ni-Cu-Zn ferrite material, a Ni-Cu-Zn-Mg ferrite material, or a Ni-Cu ferrite material. The magnetic material constituting each insulator layer 21 may include an Fe alloy. Each insulator layer 21 may be made of a nonmagnetic material. Non-magnetic materials include, for example, glass ceramic materials or dielectric materials. In this embodiment, each insulator layer 21 is made of a sintered green sheet containing a nonmagnetic material.

As shown in FIG. 2, the coil 3 is arranged inside the element body 2 so that its coil axis C intersects with one main surface 2aa. That is, the coil 3 has a coil axis C along a direction intersecting one main surface 2aa. In this embodiment, the coil axis C is along the direction D1. As shown in FIGS. 3 and 4, as an example, the coil 3 is configured by laminating a plurality of coil conductor layers 31a, 31b, 31c and a plurality of coil connection layers 32. The coil 3 includes a plurality of stacked coil conductor layers 31a, 31b, 31c and a plurality of coil connection layers 32. That is, the coil 3 includes a plurality of turns. In this embodiment, the plurality of turns are constituted by a plurality of coil conductor layers 31a, 31b, and 31c. The plurality of coil conductor layers 31a, 31b, 31c and the plurality of coil connection layers 32 are stacked in the direction D1. In the actual coil 3, the plurality of coil conductor layers 31a, 31b, 31c and the plurality of coil connection layers 32 are integrated to such an extent that the boundaries between the coil conductor layers are not visible. Each coil conductor layer 31a, 31b, 31c and each coil connection layer 32 are provided in a defect portion formed in the corresponding insulator layer 21. Each coil conductor layer 31a, 31b, 31c and each coil connection layer 32 are made of, for example, a sintered body of conductive paste. For example, the coil 3 when viewed from the direction D1 in which the coil axis C extends has a substantially rectangular shape.

The coil 3 has one coil conductor layer 31a. The coil conductor layer 31a is the coil conductor layer that is furthest away from one main surface 2aa among the coil conductor layers 31a, 31b, and 31c. The coil 3 has a plurality of coil conductor layers 31b. In this embodiment, the number of the plurality of coil conductor layers 31b is "5". The coil 3 has a plurality of coil conductor layers 31c. In this embodiment, the number of the plurality of coil conductor layers 31c is "6". The plurality of coil conductor layers 31b, 31c and the plurality of coil connection layers 32 are arranged alternately in the direction D1. Among the plurality of coil conductor layers 31b, the coil conductor layer 31b and the coil conductor layer 31a that are furthest apart from one main surface 2aa are connected via the coil connection layer 32. The plurality of coil conductor layers 31b and 31c are connected to each other via the plurality of coil connection layers 32.

The coil 3 has an end 33 and an end 34 that is farther away from the one main surface 2aa than the end 33 is. For example, if end 33 constitutes a first end, end 34 constitutes a second end. The end 33 is included in the coil conductor layer 31b closest to one main surface 2aa among the plurality of coil conductor layers 31b. End 34 is included in coil conductor layer 31a. The end 33 and the external electrode 41 overlap when viewed from the direction D1. The end 33 and the external electrode 41 are connected via a connecting conductor 51. In this embodiment, the connection conductor 51 has at least one pad conductor and at least one through-hole conductor arranged alternately in the direction D1. The end 34 and the external electrode 42 overlap when viewed from the direction D1. In this embodiment, the end 34 is formed to extend in the direction D2. The end 34 and the external electrode 42 are connected via a connecting conductor 52. For example, when the connecting conductor 51 constitutes the first connecting conductor, the connecting conductor 52 constitutes the second connecting conductor. When viewed from the direction D1 in which the coil axis C extends, each of the connecting conductor 51 and the connecting conductor 52 is arranged close to one of the pair of side surfaces 2c. The connecting conductor 51 and the connecting conductor 52 are provided in a defect portion formed in the corresponding insulating layer 21. The connecting conductor 51 and the connecting conductor 52 are made of, for example, a sintered body of conductive paste.

The connection conductor 52 includes a plurality of pad conductors 53 and a plurality of through-hole conductors 54 which are alternately arranged in the direction D1 and spaced apart from the coil 3. Among the plurality of pad conductors 53, the pad conductor 53 that is farthest from one main surface 2aa is connected to the end 34. Among the plurality of through-hole conductors 54 , the through-hole conductor 54 closest to one main surface 2 aa is connected to the external electrode 42 . The plurality of pad conductors 53 and the plurality of through-hole conductors 54 are arranged alternately in the direction D1.

Each of the plurality of through-hole conductors 54 has a connection end 54a connected to an adjacent pad conductor 53 among the plurality of pad conductors 53. The connection end 54a entirely overlaps each pad conductor 53 when viewed from the direction D1. Viewed from direction D1, the area of each pad conductor 53 is larger than the area of connection end 54a.

FIG. 5(a) is a plan view of the pad conductor 53 according to this embodiment. As shown in FIGS. 4 and 5(a), each of the plurality of pad conductors 53 has a portion 53a and a portion 53b. Each of the plurality of pad conductors 53 further includes a portion 53c. The portion 53a overlaps the entire connecting end 54a of an adjacent through-hole conductor 54 among the plurality of through-hole conductors 54. The portion 53b and the portion 53c are continuous with the portion 53a and are further away from the coil 3 than the portion 53a. When viewed from the direction D1, the area of the portion 53a is larger than the area of the connecting end 54a. As an example, the portion 53a viewed from the direction D1 has a rectangular shape. As an example, the connecting end 54a when viewed from the direction D1 has a circular shape. For example, when portion 53a constitutes the first portion, portion 53b may constitute the second portion, and portion 53c may constitute the third portion. For example, when portion 53a constitutes the first portion, portion 53c may constitute the second portion, and portion 53b may constitute the third portion.

As described above, the portion 53b and the portion 53c are further away from the coil 3 than the portion 53a. That is, the distance between the portion 53b and the coil 3 is larger than the distance between the portion 53a and the coil 3, and the distance between the portion 53c and the coil 3 is also larger than the distance between the portion 53a and the coil 3.
The distance between the portion 53a and the coil 3 is defined by, for example, the shortest distance G1 between the portion 53a and the coil 3. In this case, in this embodiment, the shortest distance G1 is defined as the shortest distance between the portion 53a and the coil conductor layer 31b, which are located on the same layer.
The distance between the portion 53b and the coil 3 is defined by, for example, the shortest distance G2 between the portion 53b and the coil 3. In this case, in this embodiment, the shortest distance G2 is defined as the shortest distance between the portion 53b and the coil conductor layer 31b, which are located on the same layer.
The distance between the portion 53c and the coil 3 is defined by, for example, the shortest distance G3 between the portion 53c and the coil 3. In this case, in this embodiment, the shortest distance G3 is defined as the shortest distance between the portion 53c and the coil conductor layer 31b, which are located on the same layer.
The shortest distance G2 is larger than the shortest distance G1, and the shortest distance G3 is also larger than the shortest distance G1.
The shortest distance G2 and the shortest distance G3 may be the same or different.
In this embodiment, the direction defining the shortest distance G2 is along the direction D2. The direction defining the shortest distance G2 intersects the direction D2 and the direction D3.
For example, when the shortest distance G1 constitutes the first shortest distance, the shortest distance G2 constitutes the second shortest distance. For example, when the shortest distance G1 constitutes the first shortest distance, the shortest distance G3 constitutes the third shortest distance.

The portions 53b and 53c are formed to extend from the portion 53a in a direction D3 intersecting the direction D1 in which the plurality of through-hole conductors 54 and the plurality of pad conductors 53 are adjacent to each other. Direction D3 is an example of a direction in which the portion 53b and the portion 53c do not approach the coil 3. As shown in FIGS. 4 and 5A, in this embodiment, the portion 53b has a substantially rectangular shape extending from the portion 53a toward one side in the direction D3. exhibits. The portion 53c has a substantially rectangular shape extending from the portion 53a toward the opposite side of the portion 53b in the direction D3.

As described above, in the laminated coil component 1 according to the present embodiment, each of the plurality of pad conductors 53 has a portion 53a and a portion 53b continuous with the portion 53a. The portion 53a overlaps the entire connecting end 54a of an adjacent through-hole conductor 54 among the plurality of through-hole conductors 54. The portion 53b is further away from the coil 3 than the portion 53a. Therefore, the distance between each pad conductor 53 and the coil 3 is easily adjusted by the portion 53b. As a result, in the above embodiment, the stray capacitance generated between each pad conductor 53 and the coil 3 is adjusted by the portion 53b, so that the self-resonant frequency can be controlled. The above aspect can be controlled to reduce stray capacitance and suppress a decrease in self-resonant frequency.

As described above, each of the plurality of pad conductors 53 further includes a portion 53c spaced apart from portion 53b. The portion 53c is continuous with the portion 53a and is further away from the coil 3 than the portion 53a.
In one embodiment, the portion 53a overlaps the entire connecting end 54a of the adjacent through-hole conductor 54 among the plurality of through-hole conductors 54. The portion 53c is further away from the coil 3 than the portion 53a. Therefore, the distance between each pad conductor 53 and the coil 3 can be adjusted more easily by the portion 53c. As a result, in the above embodiment, the stray capacitance generated between each pad conductor 53 and the coil 3 is adjusted by the portion 53c, so that the self-resonant frequency can be controlled. The above aspect can be controlled to reduce stray capacitance and suppress a decrease in self-resonant frequency.

As described above, each of the portions 53b and 53c is formed to extend from the portion 53a in a direction away from the coil 3. That is, each of the shortest distances G2 and G3 does not decrease as the distance from the portion 53a increases. As an example, each of the portion 53b and the portion 53c is formed to extend from the portion 53a in the direction D3. The direction that does not approach the coil 3 is a direction other than the direction that defines the shortest distance between the coil 3 and each of the portions 53b and 53c.
In a configuration in which each of the portions 53b and 53c extends from the portion 53a in a direction that does not approach the coil 3, stray capacitance generated between each pad conductor 53 and the coil 3 may be reduced depending on the direction in which the portion 53b or the portion 53c extends. can be adjusted.

The connection conductor is formed, for example, by firing stacked conductor patterns. The conductive pattern is a conductive paste applied to the green sheet. The conductive paste is filled into the through holes formed in the green sheet.
Each of the connection conductors 51 and 52 has a plurality of pad conductors and a plurality of through-hole conductors arranged alternately in a direction D1 intersecting main surface 2aa. Each of the plurality of through-hole conductors has a connection end connected to an adjacent pad conductor among the plurality of pad conductors. When viewed from direction D1, the area of each pad conductor is larger than the area of the connection end. Therefore, in the manufacturing process of each connection conductor 51, 52, even if there is an error in the direction intersecting the lamination direction between one laminated conductor pattern and the conductor pattern laminated on top of that conductor pattern, , ensure that the entire connection end of each pad conductor overlaps. As a result, connectivity between the through-hole conductor and the pad conductor is ensured.

Each pad conductor 53 has a portion 53a and a portion 53b. When viewed from the direction D1, the area of the portion 53a is larger than the area of the connecting end 54a. Therefore, even if the above-mentioned error occurs in the manufacturing process of each pad conductor 53, the entire connecting end 54a will surely overlap the portion 53a. The portion 53b is continuous with the portion 53a and is further away from the coil 3 than the portion 53a. Therefore, the laminated coil component 1 can be adjusted to ensure connectivity between the through-hole conductor 54 and the pad conductor 53 and to reduce stray capacitance generated between each pad conductor 53 and the coil 3. can. The laminated coil component 1 can ensure connectivity between the through-hole conductor and the pad conductor, and can suppress a decrease in self-resonant frequency.

As an example, the conductor pattern is formed by screen printing. In screen printing, a conductive paste is applied to the green sheet by a screen plate. A mask is formed in the mesh of the screen plate, with openings corresponding to the conductor patterns. The conductive paste placed on the mesh and mask of the screen plate passes through the openings and is applied to the green sheet.
In the mesh of the screen plate, depressions are formed at the intersections of a plurality of wire rods forming the mesh. Hereinafter, the depressions formed at the intersections of the plurality of wire rods forming the mesh of the screen plate will be referred to as "mesh depressions." When the conductive paste is applied to the green sheet, the conductive paste applied to the green sheet may enter the recesses of the mesh, thereby causing the conductive paste to be removed from the green sheet. Hereinafter, the process in which the conductive paste applied to the green sheet enters the depressions formed at the intersections of the meshes and is taken away from the green sheet is referred to as "taking away." For example, when the green sheet is brought home, the amount of conductive paste applied to the green sheet may be reduced, making it difficult for the conductive pattern to form a desired shape.

Each pad conductor 53 includes a portion 53b that is continuous from the portion 53a and extends in the direction D3 away from the coil 3. Each pad conductor 53 including portion 53a and portion 53b is larger than the pad conductor including only portion 53a. Therefore, the amount of conductive paste applied to the conductive pattern during the manufacturing process of each pad conductor 53 is greater than the amount of conductive paste applied to the conductive pattern during the manufacturing process of the pad conductor including only the portion 53a. Even if take-back occurs, the conductor pattern is likely to have the desired shape. In the manufacturing process of each connection conductor 51, 52, a conductor pattern having a desired shape is easily obtained, so that the entire connection end of each pad conductor is reliably overlapped. As a result, connectivity between the through-hole conductor and the pad conductor is ensured.

Each pad conductor 53 further includes a portion 53c that is continuous from portion 53a and spaced apart from portion 53b. The portion 53c is formed to extend in the direction D3 away from the coil 3. Each pad conductor 53 including portions 53a, 53b, and 53c is larger than the pad conductor including only portion 53a. Therefore, the amount of conductive paste applied to the conductive pattern during the manufacturing process of each pad conductor 53 is larger than the amount of conductive paste applied to the conductive pattern during the manufacturing process of the pad conductor including only the portion 53a. Therefore, even if take-back occurs, the shape of the conductor pattern is likely to be the desired shape. In the manufacturing process of each connection conductor 51, 52, a conductor pattern having a desired shape is easily obtained, so that the entire connection end of each pad conductor is reliably overlapped. As a result, connectivity between the through-hole conductor and the pad conductor is ensured.
The shape of each pad conductor 53, which is formed so that the portions 53b and 53c extend from the portion 53a to both sides in the direction D3, is formed such that the portion extends from the portion 53a to only one side in the direction D3. The pad conductor tends to have a large shape compared to the shape of the pad conductor. Therefore, during the manufacturing process of each pad conductor 53, the amount of conductive paste applied to the conductor pattern can be easily increased.

Next, modifications of the pad conductor 53 will be described with reference to FIGS. 5(b) to 5(d).
FIG. 5(b) is a plan view of a pad conductor 53A according to another modification. The pad conductor 53A will be explained below, focusing on the differences from the pad conductor 53. Pad conductor 53A does not have portion 53c. In the pad conductor 53A, the portion 53b has a substantially rectangular shape extending from the portion 53a toward the side away from the coil 3 in the direction that defines the shortest distance between the coil 3 and the portion 53b. . As an example, the portion 53b extends toward the side away from the coil 3 in the direction D2.

FIG. 5C is a plan view of a pad conductor 53B according to yet another modification. The pad conductor 53B will be described below, focusing on the differences from the pad conductor 53. In the pad conductor 53B, in the portion 53b, the distance between the coil 3 and the portion 53b at the position is larger as the distance from the portion 53a increases. That is, in the portion 53b, the shortest distance G2 at a position away from the portion 53a is greater than the shortest distance G2 at a position close to the portion 53a. Further, the shortest distance G2 increases as the distance from the portion 53a increases. In the pad conductor 53B, in the portion 53c, the distance between the coil 3 and the portion 53c at the position increases as the distance from the portion 53a increases. That is, in the portion 53c, the shortest distance G3 at a position away from the portion 53a is greater than the shortest distance G3 at a position close to the portion 53a. Further, the shortest distance G2 increases as the distance from the portion 53a increases. In this modification, pad conductor 53B has a substantially trapezoidal shape when viewed from direction D1. The pad conductor 53B having a substantially trapezoidal shape includes an upper base and a lower base extending along the direction D3, and a pair of legs 53d connecting the upper base and the lower base. In direction D3, the lower base is longer than the upper base. In the direction D2, the lower base is further away from the coil 3 than the upper base. The pair of legs 53d extends so that the distance from the coil 3 increases in the direction D2 as the distance from the portion 53a increases. At the positions of the pair of legs 53d, the greater the distance from the portion 53a, the greater the distance between the coil 3 and the portion 53c at the position.
In a configuration in which the distance between the coil 3 and the portion 53b at this position is larger as the distance from the portion 53a is greater in the portion 53b, the stray capacitance generated between each pad conductor 53 and the coil 3 is reduced depending on the length of the portion 53b. can be adjusted.
In a configuration in which the distance between the coil 3 and the portion 53c at this position is larger as the distance from the portion 53a is greater in the portion 53c, the stray capacitance generated between each pad conductor 53 and the coil 3 is reduced depending on the length of the portion 53c. can be adjusted.

FIG. 5(d) is a plan view of a pad conductor 53C according to yet another modification. The pad conductor 53C will be explained below, focusing on the differences from the pad conductor 53. In the pad conductor 53C, the width W1 of the portion 53b in the direction D2 defining the shortest distance between the coil 3 and the portion 53b is smaller at a position away from the portion 53a than at a position close to the portion 53a. That is, the portion 53b has a first width at a position close to the portion 53a, and has a second width smaller than the first width at a position away from the portion 53a. Moreover, the width W1 decreases as it moves away from the portion 53a, as shown in FIG. 5(d). That is, the portion 53b has a tapered shape in which the width W1 is smaller toward the tip of the portion 53b. In the pad conductor 53C, the width W2 of the portion 53c in the direction D2 defining the shortest distance between the coil 3 and the portion 53c is smaller at a position away from the portion 53a than at a position close to the portion 53a. That is, the portion 53c has a third width at a position close to the portion 53a, and has a fourth width smaller than the third width at a position away from the portion 53a. Moreover, the width W2 decreases as it moves away from the portion 53a, as shown in FIG. 5(d). That is, the portion 53c has a tapered shape in which the width W2 is smaller toward the tip of the portion 53c. In this modification, each of the portions 53b and 53c is formed to extend in the direction D3 from the portion 53a and taper toward the tip in the direction D3.
In a configuration in which the width of the portion 53b in the direction D2 that defines the shortest distance between the coil 3 and the portion 53b is smaller at a position away from the portion 53a than at a position close to the portion 53a, the width of the portion 53b determines the distance between each pad conductor 53 and the coil. 3 can be adjusted.
In a configuration in which the width of the portion 53c in the direction D2 that defines the shortest distance between the coil 3 and the portion 53c is smaller at a position away from the portion 53a than at a position close to the first portion 53a, each pad conductor is The stray capacitance that occurs between the coil and the coil can be adjusted.

Next, the ability of this embodiment to control the self-resonant frequency will be explained based on Examples and Comparative Examples. In the example, the Q characteristic of the laminated coil component 1 according to the present embodiment described above was confirmed. The embodiment is a laminated coil component in which the pad conductor 53 has a portion 53b and a portion 53c. In the comparative example, the Q characteristic of a laminated coil component in which the pad conductor 53 does not have the portions 53b and 53c was confirmed. In the comparative example, the pad conductor 53 is a laminated coil component consisting of only a portion 53a.

The confirmation results are shown in Figure 6. FIG. 6 is a diagram showing the Q characteristics of the laminated coil component. The Q characteristic is, for example, the frequency characteristic of the Q value. In FIG. 6, the Q characteristic in the above example is shown by a solid line, and the Q characteristic in the above comparative example is shown by a broken line.
As shown in FIG. 6, the example and the comparative example have a steep Q characteristic with a high Q value in a high frequency band. The example and the comparative example have substantially the same Q characteristics. The reason why the example and the comparative example have substantially the same Q characteristics is that the example controls stray capacitance. Embodiments control stray capacitance, for example, by suppressing an increase in stray capacitance. Thus, embodiments may control the self-resonant frequency.
The results shown in FIG. 6 confirm that the present embodiment can control the self-resonant frequency.

The present invention has been described above in detail based on the embodiments thereof. However, the present invention is not limited to the above embodiments. The present invention can be modified in various ways without departing from the gist thereof.

The coil 3 viewed from the direction D1 in which the coil axis C extends may have a polygonal shape. The coil 3 viewed from the direction D1 in which the coil axis C extends may have a circular shape. The circular shape includes a perfect circle, an ellipse, and a long side.

When viewed from the direction D1 in which the coil axis C extends, each of the connection conductor 51 and the connection conductor 52 may be arranged at approximately the same distance from both of the pair of side surfaces 2c. When viewed from the direction D1 in which the coil axis C extends, the connecting conductor 51 is disposed close to one of the pair of side surfaces 2c, and the connecting conductor 52 is disposed close to the other of the pair of side surfaces 2c. Good too. When viewed from the direction D1 in which the coil axis C extends, the connecting conductor 51 and the connecting conductor 52 may be arranged diagonally to the coil axis C.

As understood from the descriptions of the embodiments and modifications described above, this specification includes the disclosure of the following aspects.
(Additional note 1)
an element body having a main surface constituting a mounting surface;
a first external electrode and a second external electrode arranged on the main surface and spaced apart from each other;
A coil that is arranged inside the element body so that the coil axis extends along a direction intersecting the main surface, and has a first end and a second end that is farther from the main surface than the first end. and,
a first connection conductor connecting the first external electrode and the first end;
a second connection conductor connecting the second external electrode and the second end;
The second connection conductor has a plurality of pad conductors and a plurality of through-hole conductors that are alternately arranged in a direction crossing the main surface and are spaced apart from the coil,
Each of the plurality of through-hole conductors has a connection end connected to an adjacent pad conductor among the plurality of pad conductors,
Each of the plurality of pad conductors is
a first portion that overlaps the entire connecting end of an adjacent through-hole conductor among the plurality of through-hole conductors;
a second portion that is continuous with the first portion and is further away from the coil than the first portion;
Laminated coil parts.
(Additional note 2)
The laminated coil component according to appendix 1, wherein the second portion is formed to extend from the first portion in a direction away from the coil.
(Additional note 3)
The laminated coil component according to Supplementary note 1 or 2, wherein in the second portion, the distance between the coil and the second portion at the position is larger as the distance from the first portion increases.
(Additional note 4)
Any one of Supplementary Notes 1 to 3, wherein the width of the second portion in the direction defining the shortest distance between the coil and the second portion is smaller at a position away from the first portion than at a position close to the first portion. Laminated coil parts listed in one.
(Appendix 5)
Each of the plurality of pad conductors further includes a third portion spaced apart from the second portion,
The laminated coil component according to any one of Supplementary Notes 1 to 4, wherein the third portion is continuous with the first portion and is further away from the coil than the first portion.
(Appendix 6)
The laminated coil component according to appendix 5, wherein the third portion is formed to extend from the first portion in a direction away from the coil.
(Appendix 7)
The laminated coil component according to appendix 5 or 6, wherein in the third portion, the distance from the first portion to the position is greater, the greater the distance between the coil and the third portion at the position.
(Appendix 8)
Any one of Supplementary Notes 5 to 7, wherein the width of the third portion in the direction defining the shortest distance between the coil and the third portion is smaller at a position away from the first portion than at a position close to the first portion. Laminated coil parts listed in one.
(Appendix 9)
An element body having a main surface,
a first external electrode and a second external electrode arranged on the main surface;
a coil disposed inside the element body and including a plurality of turns;
a first connecting conductor connecting the first external electrode and the coil;
a second connecting conductor connecting the second external electrode and the coil and facing the plurality of turns;
The second connection conductor includes a pad conductor and a through-hole conductor that are adjacent to each other,
The through-hole conductor includes a connection end connected to the pad conductor,
The pad conductor is
a first portion that overlaps the entire connection end and has a first shortest distance from the coil;
a second portion that is continuous with the first portion and has a second shortest distance from the coil that is greater than the first shortest distance.
(Appendix 10)
The laminated coil component according to appendix 9, wherein in the second portion, the second shortest distance at least does not decrease with increasing distance from the first portion.
(Appendix 11)
The laminated coil component according to appendix 9 or 10, wherein in the second portion, the second shortest distance at a position away from the first portion is larger than the second shortest distance at a position close to the first portion.
(Appendix 12)
The laminated coil component according to appendix 11, wherein the second shortest distance increases as the distance from the first portion increases.
(Appendix 13)
Any one of Supplementary notes 9 to 12, wherein the second portion has a first width at a position close to the first portion and a second width smaller than the first width at a position away from the first portion. Laminated coil parts described in .
(Appendix 14)
The pad conductor is
A third portion that is continuous with the first portion, is spaced from the second portion, and has a third shortest distance from the coil that is greater than the first shortest distance, any one of Supplementary Notes 9 to 13. The laminated coil parts mentioned in one of the above.
(Appendix 15)
15. The laminated coil component according to attachment 14, wherein in the third portion, the third shortest distance at least does not decrease with increasing distance from the first portion.
(Appendix 16)
The laminated coil component according to appendix 14 or 15, wherein in the third portion, the third shortest distance from a position close to the first portion to a position away from the first portion is larger than the third shortest distance at a position close to the first portion. .
(Appendix 17)
The laminated coil component according to attachment 16, wherein the third shortest distance increases as the distance from the first portion increases.
(Appendix 18)
Any one of appendices 14 to 17, wherein the third portion has a third width at a position close to the first portion and a fourth width smaller than the third width at a position away from the first portion. Laminated coil parts described in .

DESCRIPTION OF SYMBOLS 1... Laminated coil component, 2... Element body, 2a, 2aa... Main surface, 3... Coil, 31a... Coil conductor layer, 31b... Coil conductor layer, 31c... Coil conductor layer, 32... Coil connection layer, 33, 34... End, 41, 42... External electrode, 51, 52... Connection conductor, 53, 53A, 53B, 53C... Pad conductor, 53a, 53b, 53c... Portion, 53d... Leg, 54... Through-hole conductor, 54a... Connection end, C...Coil axis, D1, D2, D3...Direction, G1, G2...Shortest distance, W1, W2...Width.

Claims (18)

an element body having a main surface constituting a mounting surface;
a first external electrode and a second external electrode arranged on the main surface and spaced apart from each other;
A coil that is arranged inside the element body so that the coil axis extends along a direction intersecting the main surface, and has a first end and a second end that is farther from the main surface than the first end. and,
a first connection conductor connecting the first external electrode and the first end;
a second connection conductor connecting the second external electrode and the second end;
The second connection conductor has a plurality of pad conductors and a plurality of through-hole conductors that are alternately arranged in a direction crossing the main surface and are spaced apart from the coil,
Each of the plurality of through-hole conductors has a connection end connected to an adjacent pad conductor among the plurality of pad conductors,
Each of the plurality of pad conductors is
a first portion that overlaps the entire connecting end of an adjacent through-hole conductor among the plurality of through-hole conductors;
a second portion that is continuous with the first portion and is further away from the coil than the first portion;
Laminated coil parts. The laminated coil component according to claim 1, wherein the second portion is formed to extend from the first portion in a direction away from the coil. The laminated coil component according to claim 1 or 2, wherein in the second portion, the distance between the coil and the second portion is larger at a position where the distance from the first portion is greater. The laminate according to claim 3, wherein the width of the second portion in a direction defining the shortest distance between the coil and the second portion is smaller at a position farther from the first portion than at a position closer to the first portion. coil parts. Each of the plurality of pad conductors further includes a third portion spaced apart from the second portion,
The laminated coil component according to claim 1, wherein the third portion is continuous with the first portion and is further away from the coil than the first portion. The laminated coil component according to claim 5, wherein the third portion is formed to extend from the first portion in a direction away from the coil. The laminated coil component according to claim 5 or 6, wherein, in the third portion, the distance between the coil and the third portion is larger at a position where the distance from the first portion is greater. The laminate according to claim 7, wherein the width of the third portion in the direction defining the shortest distance between the coil and the third portion is smaller at a position away from the first portion than at a position close to the first portion. coil parts. An element body having a main surface,
a first external electrode and a second external electrode arranged on the main surface;
a coil disposed inside the element body and including a plurality of turns;
a first connecting conductor connecting the first external electrode and the coil;
a second connecting conductor connecting the second external electrode and the coil and facing the plurality of turns;
The second connection conductor includes a pad conductor and a through-hole conductor that are adjacent to each other,
The through-hole conductor includes a connection end connected to the pad conductor,
The pad conductor is
a first portion that overlaps the entire connection end and has a first shortest distance from the coil;
a second portion that is continuous with the first portion and has a second shortest distance from the coil that is greater than the first shortest distance. 10. The laminated coil component according to claim 9, wherein in the second portion, the second shortest distance at least does not decrease with increasing distance from the first portion. 10. The laminated coil component according to claim 9, wherein in the second portion, the second shortest distance at a position away from the first portion is larger than the second shortest distance at a position close to the first portion. The laminated coil component according to claim 11, wherein the second shortest distance increases as it moves away from the first portion. The laminated coil according to claim 9, wherein the second portion has a first width at a position close to the first portion and a second width smaller than the first width at a position away from the first portion. parts. The pad conductor is
a third portion that is continuous with the first portion, is spaced apart from the second portion, and has a third shortest distance from the coil that is greater than the first shortest distance. The laminated coil component according to any one of the items. 15. The laminated coil component according to claim 14, wherein in the third portion, the third shortest distance at least does not decrease with increasing distance from the first portion. 15. The laminated coil component according to claim 14, wherein in the third portion, the third shortest distance from a position close to the first portion to a position away from the first portion is larger than the third shortest distance at a position close to the first portion. The laminated coil component according to claim 16, wherein the third shortest distance increases away from the first portion. The laminated coil according to claim 14, wherein the third portion has a third width at a position close to the first portion and a fourth width smaller than the third width at a position away from the first portion. parts.

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