Capacitor component

A capacitor component includes multilayer ceramic capacitors and an interposer board on which the multilayer ceramic capacitors are mounted. The interposer board is provided with four or more lands that are electrically connected to the corresponding external electrodes of the multilayer ceramic capacitors, an input terminal, and an output terminal, and each of the four or more lands is electrically connected to one of the input terminal and the output terminal.

CROSS REFERENCE TO RELATED APPLICATIONS

This application claims the benefit of priority to Japanese Patent Application No. 2016-196165 filed on Oct. 4, 2016. The entire contents of this application are hereby incorporated herein by reference.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a capacitor component including a plurality of multilayer ceramic capacitors.

2. Description of the Related Art

A capacitor component including a plurality of laminate capacitors for various purposes is known, such as to increase capacitance. As such a capacitor component, Japanese Patent Application Laid-Open No. 2012-43947 describes a capacitor component with a structure in which a second multilayer capacitor is stacked on a first multilayer capacitor, and the first multilayer capacitor is mounted on a mounting board.

Unfortunately, the capacitor component described in Japanese Patent Application Laid-Open No. 2012-43947 has a structure in which the second multilayer capacitor is stacked on the first multilayer capacitor while being aligned with the first multilayer capacitor in a stacking direction, so that manufacture thereof is difficult, and there are restrictions on the size of the first multilayer capacitor and the second multilayer capacitor, being required to be substantially identical to each other.

SUMMARY OF THE INVENTION

Preferred embodiments of the present invention provide capacitor components that not only reduce restrictions on the size of a multilayer ceramic capacitor itself, but also are able to be easily manufactured.

A capacitor component according to a preferred embodiment of the present invention includes a plurality of multilayer ceramic capacitors, and an interposer board on which the plurality of multilayer ceramic capacitors are mounted, wherein the interposer board includes four or more lands that are electrically connected to respective external electrodes of the corresponding plurality of multilayer ceramic capacitors, an input terminal, and an output terminal, and the four or more lands each are electrically connected to one of the input terminal and the output terminal.

The capacitor component may preferably be configured such that each of the input terminal and the output terminal is provided on a back surface of the interposer board, the back surface is one of two sides of the interposer board, opposite to a front surface on which the lands are provided, the input terminal extends from the back surface to a first side surface of the interposer board, and the output terminal extends from the back surface to a second side surface opposite to the first side surface.

The capacitor component may preferably be configured such that the input terminal includes a portion that is provided on the first side surface to electrically connect the lands provided on the front surface of the interposer board and the input terminal to each other, and that is defined by a via conductor that is exposed to the first side surface, and the output terminal includes a portion that is provided on the second side surface to electrically connect the lands provided on the front surface of the interposer board and the output terminal to each other, and that is defined by a via conductor that is exposed to the second side surface.

The capacitor component may preferably be configured such that at least one of the lands being electrically connected to the input terminal, in the four or more lands, extends to a first end edge of the interposer board, and at least one of the lands being electrically connected to the output terminal extends to a second end edge opposite to the first end edge.

The capacitor component may preferably be configured, for example, such that the interposer board has a dimension not less than about 3.5 mm and not more than about 10.0 mm in its longitudinal direction, and a dimension not less than about 2.8 mm and not more than about 5.0 mm in its lateral direction orthogonal or substantially orthogonal to the longitudinal direction, and a ratio of the dimension in the longitudinal direction to the dimension in the lateral direction is not less than about 1.2 and not more than about 2.0.

According to various preferred embodiments of the present invention, the plurality of multilayer ceramic capacitors are configured to be mounted on the mounting board with the input terminal and the output terminal provided on the interposer board interposed therebetween while being mounted on the interposer board, the plurality of multilayer ceramic capacitors do not need to be directly connected to each other at the time of manufacture, which facilitates the manufacture. In addition, the plurality of multilayer ceramic capacitors are configured to be mounted on the interposer board, so that the plurality of multilayer ceramic capacitors do not need to be identical or substantially identical to each other in size, which enables a reduction in restrictions on size.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Preferred embodiments of the present invention will be described below with reference to the drawings to more specifically describe features of the present invention.

First Preferred Embodiment

FIG. 1is a top view of a capacitor component100in a first preferred embodiment of the present invention. The capacitor component100in the first preferred embodiment includes a first multilayer ceramic capacitor10, a second multilayer ceramic capacitor20, and an interposer board30on which the first multilayer ceramic capacitor10and the second multilayer ceramic capacitor20are mounted.

FIG. 2is a perspective view of the first multilayer ceramic capacitor10.FIG. 3is a sectional view of the first multilayer ceramic capacitor10illustrated inFIG. 2, taken along line III-III. While a structure of the first multilayer ceramic capacitor10will be described below, the second multilayer ceramic capacitor20has the same or substantially the same structure as that of the first multilayer ceramic capacitor10.

The first multilayer ceramic capacitor10includes a laminate11, and a pair of external electrodes14aand14b.

The laminate11includes a plurality dielectric layers12made of dielectric ceramics that are alternately stacked, first internal electrodes13athat extend to a first end surface15aof the laminate11, and second internal electrodes13bthat extend to a second end surface15bthereof. That is, the plurality of dielectric layers12, and the plurality of first and second internal electrodes13aand13b, are alternately stacked to provide the laminate11.

The external electrode14ais not only provided on all of the first end surface15aof the laminate11, but also extends to a first principal surface16a, a second principal surface16b, a first side surface17a, and a second side surface17bfrom the first end surface15a. The external electrode14ais electrically connected to the first internal electrodes13a.

The external electrode14bis not only provided on all of the second end surface15bof the laminate11, but also extends to the first principal surface16a, the second principal surface16b, the first side surface17a, and the second side surface17bfrom the second end surface15b. The external electrode14bis electrically connected to the second internal electrodes13b.

FIGS. 4A and 4Billustrate the interposer board30of the capacitor component100.FIG. 4Aillustrates a front surface30aon both sides of the interposer board30, on which the multilayer ceramic capacitors10and20are mounted, andFIG. 4Billustrates a back surface30bopposite to the front surface30aon which the multilayer ceramic capacitors10and20are mounted.

On the front surface30aof the interposer board30, a first land41, a second land42, a third land43, and a fourth land44are provided.

The first multilayer ceramic capacitor10is mounted so as to extend over the first land41and the second land42of the interposer board30. Specifically, as illustrated inFIG. 1, the external electrode14aof the first multilayer ceramic capacitor10is provided on the first land41, and the external electrode14bthereof is provided on the second land42. As a result, the external electrode14aof the first multilayer ceramic capacitor10is electrically connected to the first land41of the interposer board30, and the external electrode14bthereof is electrically connected to the second land42thereof.

The second multilayer ceramic capacitor20is mounted so as to extend over the third land43and the fourth land44of the interposer board30. Specifically, as illustrated inFIG. 1, the external electrode24aof the second multilayer ceramic capacitor20is provided on the third land43, and the external electrode24bthereof is provided on the fourth land44. As a result, the external electrode24aof the second multilayer ceramic capacitor20is electrically connected to the third land43of the interposer board30, and the external electrode24bthereof is electrically connected to the fourth land44thereof.

The interposer board30is provided with one input terminal45and one output terminal46. In the present preferred embodiment, the input terminal45and the output terminal46are provided on the back surface30bof the interposer board30.

Each of the first land41, the second land42, the third land43, and the fourth land44is electrically connected to one of the input terminal45and the output terminal46.

In the present preferred embodiment, the first land41and the third land43are electrically connected to the input terminal45, and the second land42and the fourth land44are electrically connected to the output terminal46.

FIG. 5is a sectional view of the interposer board30illustrated inFIG. 4, taken along line V-V.FIG. 6is a sectional view of the interposer board30illustrated inFIG. 5, taken along line VI-VI.

As illustrated inFIG. 5, the interposer board30in the present preferred embodiment preferably includes a first board31, a second board32, and a third board33that are stacked. However, the structure of the interposer board30is not limited to the structure illustrated inFIG. 5.

The first board31is provided with the first land41, the second land42, the third land43, and the fourth land44. That is, the front surface30aof the interposer board30illustrated inFIG. 4Ais a front surface of the first board31.

The third board33is provided with the input terminal45and the output terminal46. That is, the back surface30bof the interposer board30illustrated inFIG. 4Bis a back surface of the third board33.

The second board32is disposed between the first board31and the third board33.

The interposer board30includes a first via conductor51, a second via conductor52, a third via conductor53, a fourth via conductor54, a first copper wire61, and a second copper wire62.

The first via conductor51passes through the first board31, the second board32, and the third board33to electrically connect the first land41and the input terminal45to each other.

The second via conductor52is provided at a position under the second land42and passes through the first board31. The third via conductor53is provided at a position under the third land43and passes through the first board31and the second board32. The fourth via conductor54passes through the first board31, the second board32, and the third board33to electrically connect the fourth land44and the output terminal46to each other.

The first copper wire61is disposed between the second board32and the third board33to be electrically connected to the first via conductor51and the third via conductor53. The second copper wire62is disposed between the first board31and the second board32to be electrically connected to the second via conductor52and the fourth via conductor54.

The first land41on the first board31is electrically connected to the input terminal45through the first via conductor51.

The third land43is electrically connected to the first land41through the third via conductor53, the first copper wire61, and the first via conductor51. That is, the first land41and the third land43are electrically connected to the input terminal45.

The fourth land44is electrically connected to the output terminal46through the fourth via conductor54.

The second land42is electrically connected to the fourth land44through the second via conductor52, the second copper wire62, and the fourth via conductor54. That is, the second land42and the fourth land44are electrically connected to the output terminal46.

As described above, the first multilayer ceramic capacitor10is mounted on the first land41and the second land42of the interposer board30, and the second multilayer ceramic capacitor20is mounted on the third land43and the fourth land44of the interposer board30. As is evident from the first land41and the third land43that are electrically connected to each other, as well as from the second land42and the fourth land44that are electrically connected to each other, the first multilayer ceramic capacitor10and the second multilayer ceramic capacitor20are connected in parallel.

An example of a preferable size of the capacitor component100in the present preferred embodiment will be described.

However, a size of the capacitor component100is not limited to the size described below.

In the first multilayer ceramic capacitor10and the second multilayer ceramic capacitor20, a direction in which the pair of external electrodes14aand14bface each other is a lengthwise direction, a stacked direction of the dielectric layer12and the inside electrodes13aand13bis a thickness direction, and a direction orthogonal or substantially orthogonal to each of the lengthwise direction and the thickness direction is a width direction. In this case, preferably, a dimension L1in the lengthwise direction is about 3.2 mm, a dimension W1in the width direction is about 2.5 mm, and a dimension T1in the thickness direction is about 2.5 mm, for example.

It is preferable that the interposer board30has a dimension L2not less than about 3.5 mm and not more than about 10.0 mm in its longitudinal direction, and a dimension W2not less than about 2.8 mm and not more than about 5.0 mm in its lateral direction orthogonal or substantially orthogonal to the longitudinal direction, and a ratio of the dimension L2in the longitudinal direction to the dimension W2in the lateral direction is not less than about 1.2 and not more than about 2.0, for example. Here, the interposer board30preferably has a dimension L2of about 7.3 mm in the longitudinal direction, a dimension W2of about 4.3 mm in the lateral direction, a thickness of about 0.1 mm, and a ratio of about 1.7 of the dimension L2in the longitudinal direction to the dimension W2in the lateral direction, for example.

Each of the first land41to the fourth land44preferably has a width L3of about 0.5 mm, for example. A distance L4between the first land41and the second land42, as well as a distance L4between the third land43and the fourth land44is preferably about 2.4 mm, and a distance L5between the second land42and the third land43is preferably about 0.3 mm, for example.

In the longitudinal direction of the interposer board30, a distance L6between the first land41and a first end edge35of the interposer board30, as well as a distance between the fourth land44and a second end edge36of the interposer board30is preferably about 0.1 mm, for example. In the lateral direction of the interposer board30, a distance W3between each of the first land41to the fourth land44, and each of a third end edge37and a fourth end edge38of the interposer board30is preferably about 0.15 mm, for example.

The interposer board30is provided with the first via conductor51to the fourth via conductor54each preferably having a diameter of about 0.3 mm, for example. In addition, each of the first copper wire61and the second copper wire62, provided in the interposer board30, preferably has a thickness of about 0.035 mm, for example.

The capacitor component100in the present preferred embodiment is mounted on a mounting board70(refer toFIG. 7). InFIG. 7, the first multilayer ceramic capacitor10and the second multilayer ceramic capacitor20are eliminated.

As illustrated inFIG. 7, the mounting board70is provided with a first mount land71and the second mount land72. The capacitor component100is mounted by soldering, for example, such that the input terminal45is electrically connected to the first mount land71, and the output terminal46is electrically connected to the second mount land72.

While only the pair of mount lands71and72used to mount the capacitor component100are provided on the mounting board70inFIG. 7, a plurality of mount lands and wires used to mount a plurality of electronic components may be provided, for example.

The capacitor component100in the present preferred embodiment is designed such that a terminal pitch between the input terminal45and the output terminal46of the interposer board30is a dimension suitable for a mounted land pitch between the first mount land71and the second mount land72, provided on the mounting board70. As a result, even if a multilayer ceramic capacitor has a distance between a pair of external electrodes, or an electrode pitch, less than a mounted land pitch of the mounting board70, the multilayer ceramic capacitor is able to be mounted on the mounting board70with the interposer board30interposed therebetween.

When the first multilayer ceramic capacitor10and the second multilayer ceramic capacitor20are mounted on the interposer board30, the capacitors are able to be easily connected in parallel. Thus, for example, the second multilayer ceramic capacitor does not need to be stacked on the first multilayer ceramic capacitor in order to provide a parallel connection, so that it is easy to manufacture a capacitor component in which a plurality of multilayer ceramic capacitors are connected in parallel.

While a conventional method for stacking a plurality of multilayer ceramic capacitors in a perpendicular or substantially perpendicular direction to a mounting board causes an increase in a dimension in the perpendicular or substantially perpendicular direction, or a dimension in a height direction, the capacitor component100in the present preferred embodiment includes a plurality of multilayer ceramic capacitors that are mounted on the interposer board30to enable a reduction in a dimension in the height direction.

The capacitor component100in the present preferred embodiment achieves a low ESR and a low ESL, as compared to a polyelectrolyte capacitor having substantially the same size.

FIG. 8are graphs showing equivalent series resistance (ESR) and equivalent series inductance (ESL), produced by simulation of the capacitor component100in the first preferred embodiment, a capacitor component100A with a modified structure of the first preferred embodiment, described below, and a polyelectrolyte capacitor being a comparison object.FIG. 8Ashows a relationship between frequency and the ESL, andFIG. 8Bshows a relationship between frequency and the ESR.

The capacitor component100used for the simulation has a capacitance of about 330 μF, for example, and includes the interposer board30having a dimension L2of about 7.3 mm in the longitudinal direction, and a dimension W2of about 4.3 mm in the lateral direction; and two multilayer ceramic capacitors10and20each having a dimension L1of about 3.2 mm in the lengthwise direction, a dimension W1of about 2.5 mm in the width direction, and a dimension T1of about 2.5 mm in the thickness direction, for example. The capacitor component100has an ESL of about 580 pH at a frequency of 100 MHz.

The capacitor component100A in the modified structure of the first preferred embodiment, described below, has a structure in which four multilayer ceramic capacitors are mounted on an interposer board. The capacitor component100A used for the simulation has a capacitance of about 220 μF, for example, and includes an interposer board having a size identical or substantially identical to that of the interposer board30described above, and four multilayer ceramic capacitors each having a dimension of about 3.2 mm in the lengthwise direction, a dimension of about 1.6 mm in the width direction, and a dimension of about 1.6 mm in the thickness direction, for example. The capacitor component100A has an ESL of about 480 pH at a frequency of about 100 MHz.

The polyelectrolyte capacitor being a comparative example used for the simulation has a dimension of about 7.3 mm in the lengthwise direction, a dimension of about 4.3 mm in the width direction, and a dimension of about 1.9 mm in the height direction, for example. The polyelectrolyte capacitor has an ESL of about 1170 pH at a frequency of 100 MHz.

That is, the capacitor component100in the present preferred embodiment, as well as the capacitor component100A in the modified structure of the first preferred embodiment, described below, have an ESL at frequency of 100 MHz that is one-half or less of that of a polyelectrolyte capacitor having the same or substantially the same size as that of the interposer board in plan view. In addition, as illustrated inFIG. 8A, the capacitor component100in the present preferred embodiment as well as the capacitor component100A in the modified structure of the first preferred embodiment have a lower ESL at not only a frequency of 100 MHz, but also another frequency, than that of the polyelectrolyte capacitor having the same or substantially the same size as that of the interposer board in plan view.

Further, as illustrated inFIG. 8B, the capacitor component100in the present preferred embodiment as well as the capacitor component100A in the modified structure of the first preferred embodiment have a lower ESR than that of the polyelectrolyte capacitor having the same or substantially the same size as that of the interposer board in plan view.

Thus, when the capacitor component100in the present preferred embodiment or the capacitor component100A in the modified structure of the first preferred embodiment, each of which has a low ESR and a low ESL, is used instead of a polyelectrolyte capacitor, it is possible to improve the performance of a product in which the capacitor component is mounted.

Modified Structure of First Preferred Embodiment

As long as the number of multilayer ceramic capacitors mounted on the interposer board30is two or more, the number is not particularly limited. Thus, as described above, two multilayer ceramic capacitors may be mounted, or three or more multilayer ceramic capacitors may be mounted.

FIG. 9is a top view of a capacitor component100A in a modified structure of the first preferred embodiment, in which four multilayer ceramic capacitors91to94are mounted on an interposer board30. The multilayer ceramic capacitors91and92are mounted on a first land41and a second land42of the interposer board30, and the multilayer ceramic capacitors93and94are mounted on a third land43and a fourth land44of the interposer board30. This case also enables the four multilayer ceramic capacitors91to94to be connected in parallel.

Second Preferred Embodiment

In the capacitor component100in the first preferred embodiment described above, the input terminal45and the output terminal46are provided on the back surface30bof the interposer board30.

In a capacitor component200in a second preferred embodiment of the present invention, an input terminal and an output terminal are provided not only on a back surface of an interposer board but also on a side surface thereof.

In the capacitor component200in the second preferred embodiment, the structure of a first multilayer ceramic capacitor and a second multilayer ceramic capacitor, mounted on an interposer board, as well as a connection relationship between the interposer board and the two multilayer ceramic capacitors, are the same or substantially the same as those of the capacitor component100in the first preferred embodiment. Thus, portions of an interposer board300of the capacitor component200in the second preferred embodiment that are different from those of the interposer board30described in the first preferred embodiment, will primarily be described below.

FIG. 10is a perspective view of the interposer board300of the capacitor component200in the second preferred embodiment.FIG. 11Aillustrates a front surface300aof the interposer board300, andFIG. 11Billustrates a back surface300bthereof.

On the front surface300aof the front interposer board300, a first land410, a second land420, a third land430, and a fourth land440are provided. On the back surface300bof the interposer board300, an input terminal450and an output terminal460are provided.

The first land410extends to a first end edge350of the interposer board300in its longitudinal direction (refer toFIG. 11A). That is, in the longitudinal direction of the interposer board300, a distance between the first land410and the first end edge350of the interposer board300is zero or substantially zero.

The fourth land440extends to a second end edge360opposite to the first end edge350in the longitudinal direction of the interposer board300(refer toFIG. 11A). That is, in the longitudinal direction of the interposer board300, a distance between the fourth land440and the second end edge360of the interposer board300is zero or substantially zero.

The input terminal450is provided on the back surface300bof the interposer board300and extends to an end edge370in the longitudinal direction of the interposer board300(refer toFIG. 11B). The output terminal460is provided on the back surface300bof the interposer board300and extends to an end edge380of the interposer board300(refer toFIG. 11B).

In a first side surface300cof the interposer board300on a first end edge350side, fifth via conductors500are provided while being exposed to electrically connect the first land410and the input terminal450to each other. The fifth via conductors500correspond to the first via conductor51described in the first preferred embodiment, and have a shape acquired by cutting the first via conductor51along its axial direction. While four of the fifth via conductors500are preferably provided in the present preferred embodiment, three or less of the fifth via conductors500, or five or more of the fifth via conductors500, may be provided, for example.

The fifth via conductors500provided on the first side surface300cof the interposer board300are electrically connected to the input terminal45, and also defines an input terminal. Thus, the input terminal extends from the back surface300bof the interposer board300to the first side surface300cthereof.

That is, the input terminal extends from the back surface300bof the interposer board300to the first side surface300cthereof in the capacitor component200in the present preferred embodiment, and includes a portion provided on the first side surface300c, being defined by the fifth via conductors500exposed to the first side surface300c.

In a second side surface300dopposite to the first side surface300cof the interposer board300, sixth via conductors600are provided to electrically connect the fourth land440and the output terminal460to each other. The sixth via conductors600correspond to the fourth via conductor54described in the first preferred embodiment, and has a shape acquired by cutting the fourth via conductor54along its axial direction. While four of the sixth via conductors600are preferably provided in the present preferred embodiment, three or less of the sixth via conductors600, or five or more of the sixth via conductors600, may be provided, for example.

The sixth via conductors600provided on the second side surface300dof the interposer board300are electrically connected to the output terminal460, and also define an output terminal. Thus, the output terminal extends from the back surface300bof the interposer board300to the second side surface300d.

That is, the output terminal extends from the back surface300bof the interposer board300to the second side surface300dof the capacitor component200in the present preferred embodiment, and includes a portion provided on the second side surface300d, being defined by the sixth via conductors600exposed to the second side surface300d.

In the capacitor component200in the second preferred embodiment, the input terminal and the output terminal are also preferably provided on the corresponding side surfaces of the interposer board300, so that mounting of the capacitor component200to a mounting board is facilitated.

For example, the capacitor component100in the first preferred embodiment needs to be mounted by soldering the input terminal45and the output terminal46, provided on the back surface30bof the interposer board30, to the corresponding mount lands of a mounting board, for example.

However, in the capacitor component200in the second preferred embodiment, the input terminal and the output terminal are provided not only in the back surface300bof the interposer board300but also in the corresponding side surfaces thereof, so that each of the input terminal and the output terminal, provided on the corresponding side surfaces of the interposer board30, are able to be soldered to a mounting board. For example, the input terminal and the output terminal provided on the corresponding side surfaces of the interposer board300is able to be soldered to the corresponding mount lands of a mounting board while the capacitor component200is mounted on the mounting board, so that mounting of the capacitor component200is facilitated.

In the capacitor component100in the first preferred embodiment, the capacitor component100does not need to include a solder fillet in its side surface, so that another electronic component may be mounted close to the capacitor component100, for example.

Modified Structure of Second Preferred Embodiment

The capacitor component200in the second preferred embodiment described above is configured to enable a side surface of an interposer board to be soldered to a mount land of a mounting board. In contrast, a capacitor component may also preferably be configured to enable a front surface of an interposer board to be soldered to a mount land of a mounting board.

FIG. 12is a perspective view of an interposer board300of a capacitor component200A with a modified structure in which a fifth via conductor500and a sixth via conductor600are eliminated from the capacitor component200in the second preferred embodiment.

A first land410provided on a front surface300aof the interposer board300extends to a first end edge350, and a fourth land440extends to a second end edge360. This facilitates soldering between the first land410of the interposer board300and a mount land of a mounting board as well as between the fourth land440thereof and a mount land of the mounting board, so that mounting of the capacitor component200A to the mounting board is facilitated.

The present invention is not limited to the preferred embodiments described above, and various applications and modifications may be added within the scope of the present invention.

For example, a plurality of multilayer ceramic capacitors mounted on an interposer board are not limited to the same or substantially the same size, and may be different sizes. That is, when a land is provided on an interposer board in accordance with a size of a multilayer ceramic capacitor to be mounted, multilayer ceramic capacitors having various sizes are able to be mounted on the interposer board. As a result, multilayer ceramic capacitors having various sizes are able to be easily mounted on a mounting board using an interposer board.

A connection configuration of a plurality of multilayer ceramic capacitors mounted on an interposer board is not limited to a parallel connection.

While the input terminal45and the output terminal46are described based on the premise that they are provided on a back surface of an interposer board, they may be provided on a surface other than the back surface, such as a side surface.

While the capacitor component200in the second preferred embodiment has a structure in which the fifth via conductors500electrically connecting the first land410and the input terminal450also define an input terminal, an input terminal may also be provided on a side surface of an interposer board without including the above-described structure. For example, the capacitor component100in the first preferred embodiment may have a structure in which the input terminal45provided on the back surface30bof the interposer board30extends to a side surface thereof. Likewise, the capacitor component100in the first preferred embodiment may have a structure in which the output terminal46provided on the back surface30bof the interposer board30extends to a side surface thereof.

A structure of a multilayer ceramic capacitor is not limited to the structure illustrated in each ofFIGS. 2 and 3.