JP7484385B2 - Circuit Board - Google Patents

Description

The disclosure herein relates to a circuit board.

As shown in Patent Document 1, a circuit board is known in which an electrolytic capacitor is mounted on the surface of a resin substrate.

JP 2016-164900 A

In Patent Document 1, four electrolytic capacitors are mounted in a row on the surface of a resin substrate. A thermally conductive adhesive is provided at the four corners around the inner two of these four electrolytic capacitors.

Thermal conductive adhesive is an adhesive that contains fillers to increase thermal conductivity. However, the main component of the adhesive is resin, which does not have high thermal conductivity. Therefore, if the surface of the inner electrolytic capacitor (electronic element) is covered by each of the thermal conductive adhesives provided at the four corners, there is a risk that the heat dissipation performance will deteriorate.

The objective of this disclosure is to provide a circuit board that suppresses deterioration of the heat dissipation performance of the internal electronic elements.

A circuit board according to one aspect of the present disclosure includes a wiring board (10);
a plurality of electronic elements (50) each including a plurality of connection parts (53) having one end connected to one surface (11a) of the wiring board, and a main body part (52) to which the other ends of the plurality of connection parts are coupled;
a vibration-isolating section (90) that suppresses vibration of each of the plurality of electronic elements by connecting a main body of each of the plurality of electronic elements to a wiring board,
At least three electronic elements are arranged along one surface and in at least one of a row direction and a column direction that are perpendicular to each other,
a vibration-proof portion is provided around a main body portion of an electronic element located inside, excluding electronic elements located at both ends, among at least three electronic elements arranged along at least one of a row direction and a column direction, along one surface of four corners between the row direction and the column direction and arranged in a contralateral direction intersecting the row direction and the column direction,
a direction in which the connection positions of the plurality of connection portions of each of the at least three electronic elements arranged in at least one of the row direction and the column direction intersect with the pair direction ;
The vibration-proof portion is a resin material applied toward one surface of the wiring board and a side surface of the electronic element,
The vibration-isolating portions provided only at the two corners aligned in the contralateral direction are each provided in common to the main bodies of two adjacent electronic elements aligned in the contralateral direction .

As a result, vibration-proofing parts (90) are not provided at two of the four corners around the main body part (52) of the inner electronic element (50). This prevents the heat dissipation performance of the inner electronic element (50) from deteriorating.

The direction in which the connection positions of the multiple connection parts (53) that connect the main body part (52) of the electronic element (50) and the wiring board (10) are arranged with one surface (11a) of the wiring board (10) intersects with the pair direction in which the two corners where the vibration-proof parts (90) are provided are arranged among the four corners around the main body part (52) of the inner electronic element (50).

This prevents the inner electronic element (50) from vibrating in a direction along the one surface (11a). This prevents stress from acting on the connection between the connection portion (53) and the wiring board (10) due to vibration. As a result, the occurrence of poor electrical connection between the connection portion (53) and the wiring board (10) is prevented.

The reference numbers in parentheses above merely indicate the corresponding relationship to the configurations described in the embodiments below, and do not limit the technical scope in any way.

FIG. FIG. FIG. 13 is a top view for explaining a modified example of the circuit board. 11 is a table showing modified examples of the mounting state of the electrolytic capacitor. 11 is a table showing modified examples of the mounting state of the electrolytic capacitor. FIG. 13 is a top view showing a modified example of the mounting state of the electrolytic capacitor. FIG. 13 is a top view showing a modified example of the mounting state of the electrolytic capacitor.

Below, several embodiments for implementing the present disclosure will be described with reference to the drawings. In each embodiment, parts corresponding to matters described in the preceding embodiment may be given the same reference numerals, and duplicated explanations may be omitted. In cases where only a portion of the configuration is described in each embodiment, the other embodiment described previously may be applied to the other parts of the configuration.

It is possible to combine parts that are specifically indicated as being possible in each embodiment. In addition, even if it is not indicated as being possible to combine them, it is also possible to partially combine embodiments, embodiments and variations, and variations. If no particular problems arise with the combination, it is also possible to partially combine embodiments, embodiments and variations, and variations.

First Embodiment
The circuit board according to this embodiment will be described with reference to Figures 1 and 2. Note that Figure 2 shows the cross-sectional shapes of a wiring board 10 and a vibration-proof section 90, which will be described later.

In the following, the three mutually orthogonal directions are referred to as the x-direction, y-direction, and z-direction. In the drawings, the "directions" are omitted and simply illustrated as x, y, and z. The x-direction corresponds to the row direction. The y-direction corresponds to the column direction. The z-direction corresponds to the height direction.

The circuit board 100 has a wiring board 10 and an electronic element 50. The electronic element 50 is mounted on the wiring board 10. This forms an electric circuit on the circuit board 100. The electric circuit formed on the circuit board 100 is a power conversion circuit, an amplifier circuit, a noise filter, etc., and the type is not particularly limited.

<Wiring board>
The wiring board 10 has an insulating substrate 11 and a wiring pattern 12. The insulating substrate 11 has a flat plate shape with a small thickness in the z direction. The insulating substrate 11 has a front surface 11a and a back surface 11b aligned in the z direction. The front surface 11a corresponds to one surface.

The wiring pattern 12 includes a conductive metal material. The wiring pattern 12 is formed on the front surface 11a of the insulating substrate 11. The wiring pattern 12 may also be formed on the rear surface 11b of the insulating substrate 11 or inside the rear surface 11b.

<Electronic elements>
The electronic element 50 includes at least an electrolytic capacitor 51. The electronic element 50 may also include passive elements such as resistors and coils, and active elements such as MOSFETs. In the drawings, only the electrolytic capacitor 51 is shown among these various types of elements.

The electrolytic capacitor 51 has a main body 52 that houses a capacitor element that stores an electric charge, and a connection terminal 53 for connecting the main body 52 to the wiring board 10. The main body 52 has a columnar shape with the z direction as the axial direction. In this embodiment, the main body 52 has a cylindrical shape. Of course, the shape of the main body 52 can also be a rectangular column or the like.

The main body 52 has two end faces 52a spaced apart in the z direction, and a cylindrical side face 52b connecting these two end faces 52a. The length of the main body 52 in the z direction is equal to the length H of the side face 52b in the z direction. The maximum length of the main body 52 in a plane perpendicular to the z direction is equal to the diameter L of the end face 52a. The length H is longer than the diameter L. The main body 52 has a flat shape with the length in the z direction longer than the lengths in other directions.

The connection terminal 53 is a lead electrode. The connection terminal 53 is bent to form an L-shape. One of the two ends of the connection terminal 53 is connected to the side surface 52b of the main body 52. The connection terminal 53 extends in the y direction away from the side surface 52b, and then bends and extends in the z direction. The other of the two ends of the connection terminal 53 is connected to the wiring board 10. The two ends of the connection terminal 53 correspond to one end and the other end. The connection terminal 53 corresponds to the connection portion.

Although not shown, a through hole that opens to the front surface 11a and the back surface 11b is formed in the insulating substrate 11 of the wiring board 10. A wiring pattern 12 is formed on the wall surface that defines this through hole. The other end of the connection terminal 53 is inserted from the opening on the front surface 11a side of the through hole toward the opening on the back surface 11b side. The other end of the connection terminal 53 is electrically and mechanically connected to each of the wiring patterns 12 formed on the front surface 11a and the wall surface of the through hole by a conductive paste such as solder (not shown).

The insulating substrate 11 does not necessarily need to have a through hole. In this case, the other end of the connection terminal 53 is simply electrically and mechanically connected to the wiring pattern 12 formed on the surface 11a by conductive paste.

In this embodiment, two connection terminals 53 are connected to one main body 52. The connection positions of these two connection terminals 53 with the main body 52 are spaced apart in the y direction and lined up. The connection positions of these two connection terminals 53 with the wiring board 10 are spaced apart in the y direction and lined up. Due to this mechanical connection configuration, the electrolytic capacitor 51 is less likely to vibrate in the y direction relative to the wiring board 10.

<Layout>
1 and 2, in this embodiment, three electrolytic capacitors 51 are mounted on the front surface 11a of the wiring board 10. The three electrolytic capacitors 51 are arranged in a line and spaced apart from each other in the x direction.

The body parts 52 of the two electrolytic capacitors 51 located at both ends of the three electrolytic capacitors 51 face the body part 52 of the electrolytic capacitor 51 located on the inside while being spaced apart in the x direction. The positions of the body parts 52 of the three electrolytic capacitors 51 in the y direction are the same, and they are lined up at a distance in the x direction.

The connection terminals 53 of the two electrolytic capacitors 51 located at both ends face the connection terminal 53 of the electrolytic capacitor 51 located on the inside while being spaced apart in the x direction. The positions of one of the two connection terminals 53 connected to the main body 52 of each of the three electrolytic capacitors 51 in the y direction are the same, and they are lined up apart in the x direction. The positions of the other of the two connection terminals 53 connected to the main body 52 of each of the three electrolytic capacitors 51 in the y direction are the same, and they are lined up apart in the x direction.

Due to this configuration, a gap is created between two electrolytic capacitors 51 that are adjacent to each other in the x direction as shown in FIG. 1. The separation distance between two connection terminals 53 that are adjacent to each other in the x direction is greater than or equal to the separation distance between two main body parts 52 that are adjacent to each other in the x direction.

As described above, the body 52 of the electrolytic capacitor 51 has a cylindrical shape. Therefore, the side surface 52b of the body 52 has an arc shape. The distance between the side surfaces 52b of the body 52 of two electrolytic capacitors 51 arranged adjacent to each other in the x direction gradually increases in the y direction from the center of the body 52 toward the connecting portion of the connection terminal 53. The maximum distance between the side surfaces 52b of these two body portions 52 is equal to the distance between the two connection terminals 53.

Due to the arrangement and configuration of the electrolytic capacitor 51, large gaps are formed at the four corners on either side of the connection portion of each of the two connection terminals 53 in the main body 52 of the electrolytic capacitor 51 located on the inside.

In what follows, the larger gaps formed at the four corners are referred to as corner gaps CG. These four corner gaps CG are located between two reference lines that pass through the center of the main body 52 in the x and y directions. In FIG. 1, these four corner gaps CG are shown diagrammatically surrounded by dashed lines. The electrolytic capacitor 51 located at the end shares two of the four corner gaps CG that are aligned in the y direction with the electrolytic capacitor 51 located on the inside.

<Vibration isolation section>
The electrolytic capacitor 51 and the coil are larger in size than other resistors, semiconductor switches, etc., and have a flat shape that is long in the z direction. Therefore, when an external force is applied to the circuit board 100, they are likely to be displaced relative to the wiring board 10. Simply put, they are likely to vibrate due to the external force.

In order to suppress such vibrations, the circuit board 100 includes a vibration-proof portion 90 in addition to the wiring board 10 and the electronic element 50. The vibration-proof portion 90 is made of an insulating resin material. The vibration-proof portion 90 is applied from the opening at the tip side of the dispenser 200 shown in FIG. 2 toward the surface 11a of the wiring board 10 and the side surface 52b of the electrolytic capacitor 51. The vibration-proof portion 90 mechanically connects the wiring board 10 and the body portion 52 of the electrolytic capacitor 51. The vibration-proof portion 90 can be made of an insulating resin material that contains a material with high thermal conductivity, such as a metal, in order to increase thermal conductivity. In FIG. 1, the vibration-proof portion 90 is hatched.

As described above, the body parts 52 of two electrolytic capacitors 51 arranged adjacent to each other in the x direction are spaced apart in the x direction. The shortest separation distance SD between these two body parts 52 in the x direction is shorter than the longest separation distance in a planar direction perpendicular to the z direction of the dispenser 200. It is also possible to adopt a configuration in which the shortest separation distance SD is longer than the longest separation distance in a planar direction of the dispenser 200.

The vibration-proof portion 90 is selectively applied to the periphery of the electrolytic capacitor 51 on the wiring board 10 as shown in FIG. 1. The vibration-proof portion 90 is applied to only two of the four corner gaps CG around one electrolytic capacitor 51 that is located on the inside of three electrolytic capacitors 51 lined up in the x direction.

The two corner gaps CG to which these anti-vibration parts 90 are applied are aligned along the surface 11a in a first pair direction that intersects with the x and y directions. The remaining two corner gaps CG of the anti-vibration parts 90 that are not applied are aligned along the surface 11a in a second pair direction that is perpendicular to the first pair direction. Only the anti-vibration parts 90 applied to the two corner gaps CG aligned in the first pair direction around the main body part 52 are connected to the main body part 52. Note that it is possible that anti-vibration parts 90 applied to areas other than the corner gaps CG in the wiring board 10 may be unintentionally connected to the main body part 52 due to manufacturing errors, etc.

In this embodiment, the absolute values of the angle between the first pair direction and the x direction, and the angle between the first pair direction and the y direction are each 45°. The absolute values of the angle between the second pair direction and the x direction, and the angle between the second pair direction and the y direction are each 45°. Of course, the absolute values of these angles can be 30° or 60° instead of 45°. In Figure 1, the first pair direction and the second pair direction are not distinguished and are shown as pair directions OD by dashed lines.

Of the three electrolytic capacitors 51 lined up in the x direction, the anti-vibration portion 90 is applied to only two of the four corners around the two electrolytic capacitors 51 located at both ends. These two corners to which the anti-vibration portion 90 is applied are spaced apart and lined up in the second pair direction. The anti-vibration portion 90 applied to the two corners lined up in the second pair direction around the main body portion 52 is connected to the main body portion 52.

<Action and effect>
As described above, of the four corner gaps CG around the main body 52 of the innermost electrolytic capacitor 51 of the three electrolytic capacitors 51 lined up in the x direction, only two corner gaps CG lined up in the pair direction OD are provided with anti-vibration parts 90. The remaining two corner gaps CG are not provided with anti-vibration parts 90. This prevents the heat dissipation performance of the inner electrolytic capacitor 51 from being deteriorated by the anti-vibration parts 90.

The body 52 of the inner electrolytic capacitor 51 is connected to the wiring board 10 via vibration-proof parts 90 provided in two corner gaps CG aligned in the pair direction OD. At the same time, the body 52 of the inner electrolytic capacitor 51 is connected to the wiring board 10 by two connection terminals 53 aligned in the y direction. In this way, the alignment directions of the two vibration-proof parts 90 and the two connection terminals 53 that link the body 52 to the wiring board 10 run along and intersect with the surface 11a.

This prevents the inner electrolytic capacitor 51 from vibrating in a direction along the surface 11a. This prevents stress from acting on the connection portion between the connection terminal 53 and the wiring board 10 due to vibration. As a result, the occurrence of poor electrical connection between the connection terminal 53 and the wiring board 10 is prevented.

The two vibration-proof parts 90 and the two connection terminals 53 that connect the main body 52 of the end electrolytic capacitor 51 to the wiring board 10 are also aligned along the surface 11a and cross each other. This prevents the end electrolytic capacitor 51 from vibrating in a direction along the surface 11a. This prevents electrical connection failures between the connection terminals 53 and the wiring board 10 caused by vibrations.

The electrolytic capacitor 51 has a flat shape that is long in the z direction. This makes the electrolytic capacitor 51 prone to vibrating in the direction along the surface 11a. However, due to the connection form between the electrolytic capacitor 51 and the wiring board 10 described above, even if the electrolytic capacitor 51 is prone to vibrating in the direction along the surface 11a, the vibration is suppressed. This prevents poor electrical connection between the electrolytic capacitor 51 and the wiring board 10.

(First Modification)
In this embodiment, an example has been shown in which the vibration-proof portion 90 is applied to two of the four corners around two electrolytic capacitors 51 located at both ends of three electrolytic capacitors 51 lined up in the x direction. However, the vibration-proof portion 90 may be applied anywhere on the outside of the periphery of the electrolytic capacitor 51 located at the end, as long as it is spaced from the inner electrolytic capacitor 51.

For example, as shown in FIG. 3, the vibration-proof portion 90 may be applied to the outside of the electrolytic capacitor 51 located at the end, adjacent in the x direction to the center of the main body portion 52 (directly to the side). In such a configuration, the main body portions 52 of the three electrolytic capacitors 51 are located between the vibration-proof portions 90 applied directly to the outside of each of the electrolytic capacitors 51 at both ends. These three main body portions 52 are integrally connected by the vibration-proof portion 90 provided in the corner gap CG. Therefore, the two vibration-proof portions 90 provided on the outside and spaced apart in the x direction suppress vibration of each of the three main body portions 52 in the x direction.

(Second Modification)
1, an example has been shown in which one vibration-isolating part 90 provided in one corner gap CG is connected to each of two main body parts 52 that are adjacent to each other in the x direction. However, for example, a configuration can also be adopted in which two vibration-isolating parts 90 are provided in one corner gap CG, and these two vibration-isolating parts 90 are individually connected to each of two main body parts 52 that are adjacent to each other in the x direction.

(Third Modification)
In the present embodiment, an example in which three electrolytic capacitors 51 are arranged in the x direction has been described. However, the number and arrangement of the electrolytic capacitors 51 are not limited to the above example. Any configuration in which three or more electrolytic capacitors 51 are arranged in at least one of the x direction and the y direction can be appropriately adopted.

For example, as shown in Figures 4 and 5, a configuration can be adopted in which three electrolytic capacitors 51 arranged in the x direction are arranged in two rows in the y direction. In the following, for the sake of simplicity, the x direction is the row direction and the y direction is the column direction, and the position of the electrolytic capacitor 51 is described as, for example, the first row, second column, etc.

In the several modified examples shown in Figures 4 and 5, the electrolytic capacitors 51 in the second row correspond to the inner electrolytic capacitors 51. The electrolytic capacitors 51 in the first and third rows correspond to the end electrolytic capacitors 51.

Of the four corner gaps CG around the body 52 of the electrolytic capacitor 51 in the first row and second column, which is located on the inside, only the two corner gaps CG that are aligned in the second pair direction are provided with anti-vibration parts 90. Of the four corner gaps CG around the body 52 of the electrolytic capacitor 51 in the second row and second column, only the two corner gaps CG that are aligned in the first pair direction are provided with anti-vibration parts 90.

In the modified example shown in (a) of FIG. 4, vibration-isolating parts 90 are provided individually on the outside of the main body parts 52 of the four electrolytic capacitors 51 in the first and third rows located at the ends. The two vibration-isolating parts 90 connecting the main body parts 52 of the electrolytic capacitors 51 in the first row to the wiring board 10 are lined up in the pair direction OD. The two vibration-isolating parts 90 connecting the main body parts 52 of the electrolytic capacitors 51 in the third row to the wiring board 10 are lined up in the x direction.

In the modified example shown in FIG. 4B, an anti-vibration portion 90 is provided individually on the outside of each of the body portions 52 of the two electrolytic capacitors 51 in the first row located at the end. A common anti-vibration portion 90 is provided on the outside of each of the body portions 52 of the two electrolytic capacitors 51 in the third row. The two anti-vibration portions 90 connecting the body portions 52 of the electrolytic capacitors 51 in the first and third rows to the wiring board 10 are aligned in the pair direction OD.

In the modified example shown in FIG. 5(a), an anti-vibration portion 90 is provided individually on the outside of each of the body portions 52 of the two electrolytic capacitors 51 in the first row, which are located at the end. An anti-vibration portion 90 is provided in common on the outside of each of the body portions 52 of the two electrolytic capacitors 51 in the third row. The two anti-vibration portions 90 connecting the body portions 52 of the electrolytic capacitors 51 in the third row to the wiring board 10 are aligned in the pair direction OD.

In the modified example shown in FIG. 5B, anti-vibration sections 90 are provided individually on the outside of the main body sections 52 of the two electrolytic capacitors 51 in the first and third columns located at the ends. In each of the first and second rows, three electrolytic capacitors 51 are located between the anti-vibration sections 90 applied on the outside of the electrolytic capacitors 51 at both ends.

(Fourth Modification)
It is also possible to adopt a configuration in which three or more electrolytic capacitors 51 are arranged in each of the x and y directions. For example, in the modified example shown in Figures 6 and 7, four electrolytic capacitors 51 are arranged in each of the x and y directions.

In this configuration, the electrolytic capacitors 51 in the second and third columns correspond to the inner electrolytic capacitors 51. The electrolytic capacitors 51 in the first and fourth columns correspond to the end electrolytic capacitors 51. When the viewpoint is flipped 90°, the electrolytic capacitors 51 in the second and third rows correspond to the inner electrolytic capacitors 51. The electrolytic capacitors 51 in the first and fourth rows correspond to the end electrolytic capacitors 51.

Due to the above relationship, the electrolytic capacitors 51 located in the middle of the second row, second column, the third row, second column, and the third row, third column correspond to the inner electrolytic capacitors 51 in the x and y directions. The electrolytic capacitors 51 located in the four corners of the first row, first column, fourth column, first column, and fourth column correspond to the end electrolytic capacitors 51 in the x and y directions. The electrolytic capacitors 51 located outside the first row, second column, third column, first column, fourth column, third column, second column, and third column, excluding the four corners, correspond to the inner electrolytic capacitors 51 in one of the x and y directions and the end electrolytic capacitors 51 in the other direction.

In the modified example shown in Figures 6 and 7, the arrangement direction of the two corner gaps CG in which the vibration-isolating part 90 is provided among the four corner gaps CG around the main body part 52 of the electrolytic capacitor 51 located on the inside is reversed. For example, of the four corner gaps CG around the main body part 52 of the electrolytic capacitor 51 in the first row and second column shown in Figure 6, the two corner gaps CG in which the vibration-isolating part 90 is provided are arranged in the first pair direction. In contrast, of the four corner gaps CG around the main body part 52 of the electrolytic capacitor 51 in the first row and second column shown in Figure 7, the two corner gaps CG in which the vibration-isolating part 90 is provided are arranged in the second pair direction.

In the modified examples shown in Figures 6 and 7, the arrangement of the two vibration-isolating parts 90 provided on the electrolytic capacitor 51 located at the ends is the same as the arrangement shown in column (b) of Figure 4. Therefore, the explanation is omitted. Also, to avoid complicating the notation, no reference numerals are given to the electrolytic capacitor 51 located in the center, the corner gap CG around it, and the vibration-isolating parts 90 provided there.

(Other Modifications)
In the present embodiment, an example has been described in which the vibration-isolating unit 90 is connected to the electrolytic capacitor 51. However, the object to which the vibration-isolating unit 90 is connected is not limited to the electrolytic capacitor 51. For example, the vibration-isolating unit 90 may be connected to a coil or the like. If there is a problem of poor electrical connection due to vibration, it is also possible to adopt a configuration in which the vibration-isolating unit 90 is connected not only to an electronic element that is flat and long in the z direction, but also to an electronic element that is flat and long in the x direction or y direction, for example.

The electronic element connected to the vibration-proof part 90 has a main body part 52 and a connection terminal 53, similar to the electrolytic capacitor 51. The element housed in the main body part 52 may be different, and at least a part of the shape of the main body part 52 and the connection terminal 53 may be different from the shape exemplified in this embodiment.

In this embodiment, an example has been shown in which the ends of the two connection terminals 53 connected to the main body 52 are spaced apart in the y direction. However, a configuration in which the ends of the two connection terminals 53 are spaced apart in the x direction can also be adopted. In such a configuration, when three or more electrolytic capacitors 51 are lined up in the x direction, one of the two electrolytic capacitors 51 and one of the two connection terminals 53 provided on each of the two electrolytic capacitors 51 are located between two electrolytic capacitors 51 lined up adjacent to each other in the x direction. As shown in Figures 6 and 7, when focusing on two electrolytic capacitors 51 lined up adjacent to each other in the y direction, two connection terminals 53 are located between them.

Moreover, the direction in which the ends of the two connection terminals 53 connected to the main body 52 are arranged does not have to be strictly in the y direction or the x direction. It is sufficient that the arrangement directions of the two connection terminals 53 that connect the main body 52 to the wiring board 10 and the connection positions of the two vibration-proof parts 90 to the wiring board 10 intersect. With such a connection form, the electrolytic capacitor 51 is prevented from vibrating in a direction along the surface 11a.

Although the present disclosure has been described with reference to the embodiment, it is understood that the present disclosure is not limited to the embodiment or structure. The present disclosure also encompasses various modifications and modifications within the scope of equivalents. In addition, while various combinations and forms are shown in the present disclosure, other combinations and forms including only one element, more, or less are also within the scope and concept of the present disclosure.

10...wiring board, 11...insulating board, 11a...surface, 50...electronic element, 51...electrolytic capacitor, 52...main body, 53...connection terminal, 90...vibration-proof part, 100...circuit board

Claims (4)

A wiring board (10),
a plurality of electronic elements (50) each including a plurality of connection parts (53) having one end connected to one surface (11a) of the wiring board, and a main body part (52) to which the other ends of each of the plurality of connection parts are connected;
a vibration-proof section (90) that suppresses vibration of each of the plurality of electronic elements by connecting the main body section of each of the plurality of electronic elements to the wiring board,
At least three of the electronic elements are arranged along at least one of a row direction and a column direction that are perpendicular to each other along the one surface,
The vibration-proof portion is provided only at two corners arranged in a contralateral direction intersecting the row direction and the column direction along the one surface among four corners between the row direction and the column direction around the main body portion of the electronic element located on the inside, excluding the electronic elements located at both ends among at least three electronic elements arranged along at least one of the row direction and the column direction,
an arrangement direction of coupling positions of the plurality of connection portions provided in each of at least three of the electronic elements arranged along at least one of the row direction and the column direction intersects with the pair direction ;
The vibration-proof portion is a resin material applied toward the one surface of the wiring board and a side surface of the electronic element,
The vibration-proof portion is provided only at two corners arranged in the contiguous direction, and one vibration-proof portion is provided in common to each of the main body portions of two adjacent electronic elements arranged in the contiguous direction of the circuit board. The circuit board according to claim 1, wherein two of the multiple connection parts connected to the main body parts of two electronic elements located at both ends of at least three electronic elements aligned along at least one of the row direction and the column direction are aligned in a planar direction along the one surface. The circuit board according to claim 1 or 2, wherein the length in the height direction perpendicular to the one surface of the main body is longer than the maximum length in the direction along the one surface of the main body. The circuit board according to claim 3, wherein the electronic element is an electrolytic capacitor (51).

Images