Capacitor

Abstract

A capacitor is provided with: an element body having a pair of main surfaces facing each other; a first electrode, a second electrode, and a common electrode part provided on any main surface of the element body; a first lead terminal connected to the first electrode by solder; and a second lead terminal connected to the second electrode by solder, a first capacitor part is formed by the first electrode and the common electrode part facing each other via the element body, a second capacitor part is formed by the second electrode and the common electrode part facing each other via the element body, the first capacitor part and the second capacitor part are connected in series, and the first capacitor part and the second capacitor part face each other via the element body. The first electrode and the second electrode are insulated from each other on the surface of the element body.

Description

Technical Field

[0001] The present invention relates to a capacitor. Background Art

[0002] As an existing capacitor, a capacitor described in Japanese Patent Laid-Open No. 2011-91335 is known. The capacitor includes: a flat element body that constitutes an element body of an electronic component; electrode films formed on the front and back surfaces of a substrate, respectively; two leads each having a connection portion electrically connected to the electrode film and a lead foot portion extending outward from the connection portion; and an outer resin covering the periphery of the element body where the leads are connected. Summary of the Invention

[0003] Here, in a capacitor as described above, a capacitor portion is formed between an electrode formed on one main surface of a body and an electrode formed on the other main surface. Thus, the above-described capacitor is constituted by one capacitor portion.

[0004] In a capacitor, it is required to improve voltage tolerance.

[0005] An object of the present invention is to provide a capacitor capable of improving voltage tolerance.

[0006] A capacitor according to an aspect of the present invention includes: a body having a pair of opposed main surfaces; a first electrode, a second electrode, and a common electrode portion provided on an arbitrary main surface of the body; a first lead terminal connected to the first electrode by solder; and a second lead terminal connected to the second electrode by solder. The first capacitor portion is formed by the first electrode and the common electrode portion facing each other via the body, and the second capacitor portion is formed by the second electrode and the common electrode portion facing each other via the body. The first capacitor portion and the second capacitor portion are connected in series, and the first electrode and the second electrode are insulated from each other on the surface of the body.

[0007] The capacitor includes a first lead terminal connected to the first electrode and a second lead terminal connected to the second electrode. Therefore, the capacitor can be mounted on a circuit board through the lead terminals. In addition to these first and second electrodes, the capacitor further includes a common electrode portion. The first capacitor portion is formed by the first electrode and the common electrode portion facing each other through the body. In addition, the second capacitor portion is formed by the second electrode and the common electrode portion facing each other through the body. These first and second capacitor portions are connected in series. On the other hand, the first electrode and the second electrode are insulated from each other on the surface of the body, so that current flow between the two can be suppressed. The current flowing between the first electrode and the second electrode to which the lead terminals are connected does not directly flow between the electrodes, but flows through the first capacitor portion and the second capacitor portion in series. In this way, a plurality of capacitor portions connected in series can be formed in one body. Since the voltage applied to each capacitor portion can be reduced, the voltage tolerance can be improved. As described above, the voltage tolerance of the capacitor can be improved.

[0008] Alternatively, the first electrode and the second electrode may be provided on one main surface, the common electrode portion may be provided on the other main surface, and have a common electrode facing the first electrode and the second electrode. The first capacitor portion and the second capacitor portion are connected in series via the common electrode, and the first electrode and the second electrode are insulated from each other on one main surface. In this way, two directly connected capacitor portions can be formed in one body.

[0009] Alternatively, the common electrode portion may include a plurality of common electrodes, and the plurality of common electrodes face each other through the body. In this case, by using a plurality of common electrodes, three or more capacitor portions can be formed.

[0010] Alternatively, the common electrode portion may include a first common electrode and a second common electrode. The first capacitor portion is formed by the first electrode and the first common electrode facing each other through the body, the second capacitor portion is formed by the second electrode and the second common electrode facing each other through the body, and the third capacitor portion is formed by the first common electrode and the second common electrode facing each other through the body. In this case, three capacitor portions connected in series can be formed in one body.

[0011] Alternatively, when viewed from the first direction in which a pair of main surfaces face each other, the inner peripheral side portions of the first electrode, the second electrode, the first common electrode, and the second common electrode form a specified angle. The angles of the first electrode and the second electrode are approximately 120°, and the angles of the first common electrode and the second common electrode are approximately 240°. In this case, the electrostatic capacitances of the three capacitor portions can be made substantially equal. Therefore, uneven voltage tolerance in each capacitor portion can be suppressed.

[0012] Alternatively, the first electrode and the second common electrode may be provided on one main surface, and the second electrode and the first common electrode may be provided on the other main surface. In this case, the first lead terminal is disposed on one main surface side, and the second lead terminal is disposed on the other main surface side. Thus, a structure in which the element body is sandwiched by the lead terminals can be provided. Therefore, the thickness of the exterior resin at each main surface can be made uniform.

[0013] Alternatively, the common electrode portion may include a first common electrode, a second common electrode, and a third common electrode. The first capacitor portion is formed by opposing the first electrode and the first common electrode via the element body, the second capacitor portion is formed by opposing the second electrode and the second common electrode via the element body, the fourth capacitor portion is formed by opposing the first common electrode and the third common electrode via the element body, and the fifth capacitor portion is formed by opposing the second common electrode and the third common electrode via the element body. In this case, four capacitor portions connected in series can be formed in one element body.

[0014] Alternatively, when viewed from the first direction in which a pair of main surfaces face each other, the inner peripheral side portions of the first electrode, the second electrode, the first common electrode, the second common electrode, and the third common electrode form a predetermined angle. The angles of the first electrode and the second electrode are approximately 90°, and the angles of the first common electrode, the second common electrode, and the third common electrode are approximately 180°. In this case, the electrostatic capacitances of the four capacitor portions can be made substantially equal. Therefore, uneven voltage tolerance in each capacitor portion can be suppressed.

[0015] Alternatively, the first electrode, the second electrode, and the third common electrode may be provided on one main surface, and the first common electrode and the second common electrode may be provided on the other main surface. Thus, a structure in which both lead terminals are disposed on one main surface side can be provided. Therefore, the shapes, lengths, etc. of the lead terminals can be made the same.

[0016] Exterior resin may be disposed between the first electrode and the second electrode. In this case, a short circuit between the first electrode and the second voltage can be suppressed, and the voltage tolerance of the capacitor can be improved.

[0017] The component electrically connected to the first electrode via solder may be only the first lead terminal. That is, no resistor or the like is connected to the first electrode. In this case, generation of parasitic capacitance between the first electrode and the second electrode can be suppressed, and a capacitor portion connected in series can be formed.

[0018] The relative areas of the electrodes and the common electrodes in the plurality of capacitor portions may be substantially equal to each other. In this case, the electrostatic capacitances of the respective capacitor portions can be made substantially equal, and by making the voltages related to the respective capacitor portions substantially equal, short circuit defects and the like in any capacitor portion can be suppressed and breakdown can be suppressed.

[0019] According to the present invention, a capacitor capable of improving voltage tolerance can be provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a front view of a single-layer capacitor showing an embodiment of the present invention.

[0021] Figure 2 is along Figure 1 a sectional view taken along line II-II shown.

[0022] Figures 3A - 3C is a diagram showing the structure of the electrodes and the common electrode.

[0023] Figure 4 is a diagram showing the structure of the electrodes and the common electrode of the single-layer capacitor according to a modification.

[0024] Figure 5 is a diagram showing the structure of the electrodes and the common electrode of the single-layer capacitor according to a modification.

[0025] Figure 6 is a diagram showing the structure of the electrodes and the common electrode of the single-layer capacitor according to a modification.

[0026] Figure 7 is a diagram showing the structure of the electrodes of the single-layer capacitor according to a comparative example.

[0027] Figure 8 is a table showing simulation results.

[0028] DESCRIPTION OF SYMBOLS

[0029] 1... single-layer capacitor (capacitor), 2... body, 3A... first electrode, 3B... second electrode, 4... common electrode portion, 6A... first lead terminal, 6B... second lead terminal, 7... outer resin, 10A... common electrode, 10B... first common electrode, 10C... second common electrode, 10D... third common electrode, 21... first capacitor portion, 22... second capacitor portion, 23... third capacitor portion, 24... fourth capacitor portion, 25... fifth capacitor portion. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the description, the same symbols are used for the same elements or elements having the same function, and repeated description is omitted.

[0031] Refer to Figure 1 and Figure 2 to describe the structure of the single-layer capacitor 1 according to the present embodiment. Figure 1This is a front view of the single-plate capacitor according to the present embodiment. Figure 2 It is along Figure 1 The sectional view taken along line II-II shown in the figure. The single-plate capacitor 1 (capacitor) is an electronic component that can be mounted on a circuit board. The single-plate capacitor 1 is a capacitor component using a single plate-shaped body 2. The single-plate capacitor 1 is a flat-plate capacitor containing dielectric ceramics and has a structure different from that of a laminate with internal electrodes formed. In addition, for the sake of convenience of explanation, an XYZ coordinate system is set for explanation. The Y-axis direction is a direction perpendicular to the X-axis direction. The Z-axis direction is a direction perpendicular to the X-axis direction and the Y-axis direction. When a center line CL1 extending in the Y-axis direction is set, the shape of the single-plate capacitor 1 when viewed from the Z-axis direction has a shape that is symmetric about the center line CL1.

[0032] First, an example of the single-plate capacitor 1 in which two capacitor parts are connected in series will be described. As shown in Figure 1 and Figure 2 The single-plate capacitor 1 includes a body 2, a first electrode 3A, a second electrode 3B, a common electrode part 4, a first lead terminal 6A, a second lead terminal 6B, and an outer resin 7.

[0033] The body 2 is composed of a dielectric element, for example. The dielectric element is composed of a sintered body containing a dielectric material (such as dielectric ceramics of BaTiO3 system, Ba(Ti,Zr)O3 system, or (Ba,Ca)TiO3 system). The overall shape of the body 2 is disk-shaped or flat cylindrical. The body 2 has a pair of circular main surfaces 2a (one main surface) and 2b (the other main surface) facing each other, and an outer peripheral surface 2c connecting the main surfaces 2a and 2b. The body 2 has a relative direction of the main surfaces 2a and 2b in the Z-axis direction. The main surfaces 2a and 2b extend parallel to the XY plane. The main surface 2a is arranged on the positive side in the Z-axis direction, and the main surface 2b is arranged on the negative side in the Z-axis direction.

[0034] The first electrode 3A and the second electrode 3B are conductive layers provided on any of the main surfaces 2a and 2b of the body 2. In the present embodiment, both the first electrode 3A and the second electrode 3B are provided on the main surface 2a. In addition, the electrodes 3A and 3B are arranged so as to be separated from each other in the X-axis direction at the central position in the X-axis direction. The first electrode 3A is arranged on the positive side in the X-axis direction, and the second electrode 3B is arranged on the negative side in the X-axis direction. A gap GP1 is formed between the electrodes 3A and 3B. In the gap GP1, the main surface 2a of the body 2 is exposed from the electrodes 3A and 3B. One of the electrodes 3A and 3B is the + electrode, and the other is the - electrode. The electrodes 3A and 3B are composed of a sintered layer of an electrode paste containing metal and glass. As the metal, for example, Cu, Ni, Ag, etc. can be used.

[0035] Figure 2 The common electrode portion 4 shown is a conductive layer provided on any of the main surfaces 2a and 2b of the substrate 2. The common electrode portion 4 is composed of a combination of one or more common electrodes 10. The common electrode 10 is an electrode for forming a capacitor portion by facing other electrodes and for connecting the capacitor portions in series with each other. In the present embodiment, the common electrode portion 4 is composed of one common electrode 10A provided on the main surface 2b. As the material of the common electrode 10A, the same material as that of the electrodes 3A and 3B can be used.

[0036] Figure 1 The first lead terminal 6A and the second lead terminal 6B shown are electrically connected to the electrodes 3A and 3B, respectively. The lead terminal connected to the + electrode is the + terminal, and the lead terminal connected to the - electrode is the - terminal. The first lead terminal 6A is connected to the first electrode 3A, and the second lead terminal 6B is connected to the second electrode 3B. The connection between the lead terminals 6A, 6B and the electrode portion 3 can be made using a bonding material such as solder, for example. As the constituent materials of the lead terminals 6A, 6B, for example, phosphor bronze, stainless steel, Ni - Fe alloy (such as 42 alloy), etc. can be cited. A metal plating such as a Ni plating or a Sn plating can also be provided on the surfaces of the lead terminals 6A, 6B. The plating can be either a single layer or a multi - layer.

[0037] Figure 1 and Figure 2 The exterior resin 7 shown is a component that protects the main parts such as the substrate 2. The exterior resin 7 is provided so as to cover the substrate 2 and the base end portions of the lead terminals 6A, 6B. The exterior resin 7 is composed of a resin material having insulating properties, for example. As the resin material constituting the exterior resin 7, for example, epoxy resin, silica, etc. can be cited. The exterior resin 7 is formed, for example, by an impregnation method or injection molding using a mold. The exterior resin 7 has a shape roughly corresponding to the shapes of the substrate 2, the electrodes 3A, 3B, and the lead terminals 6A, 6B. The exterior resin 7 can be in close contact with the surfaces of the substrate 2, the electrodes 3A, 3B, and the lead terminals 6A, 6B on the inner peripheral side. Therefore, as Figure 2 shown, in the gap GP1 between the electrodes 3A, 3B, the material of the exterior resin 7 enters in a manner of being in close contact with the main surface 2a, and a structure is formed in which the exterior resin 7 is interposed between the electrodes 3A, 3B.

[0038] Next, with reference to Figures 3A - 3C , the structure of the single - plate capacitor 1 will be described in more detail. Figures 3A - 3C is a diagram showing the structure of the electrodes and the common electrode. Figure 3A is a view of the single - plate capacitor 1 with the exterior resin 7 omitted, observed from the positive side to the negative side in the Z - axis direction.

[0039] Figure 3BFIG. 0 is a view of the single-layer capacitor 1 with the outer resin 7 and the lead terminals 6A and 6B omitted, as viewed from the negative side to the positive side in the Y-axis direction. Figure 3C FIG. Figure 3C is a view of the electrodes on the main surface 2b side of the element body 2, as viewed from the positive side to the negative side in the Z-axis direction. In addition, in Figure 3C FIG. Figure 3C , the main surface 2b of the element body 2 is indicated by a phantom line. In Figure 3A , Figure 3C FIG. Figure 3C , the center point CP of the element body 2 as viewed in the Z-axis direction is shown.

[0040] As Figure 3A shown in FIG. Figure 3A , the electrodes 3A and 3B are provided so as to cover substantially the entire region other than the gap GP1 on the main surface 2a of the element body 2. Therefore, the peripheral edge portions of the electrodes 3A and 3B reach the boundary portion between the main surface 2a and the outer peripheral surface 2c. The common electrode 10A is provided so as to cover substantially the entire region of the main surface 2b. Therefore, the peripheral edge portion of the common electrode 10A reaches the boundary portion between the main surface 2b and the outer peripheral surface 2c. In addition, in Figure 3C FIG. Figure 3C , the main surface 2b is shown so as not to overlap with the outer periphery of the common electrode 10A, and thus is shown slightly larger than the common electrode 10A. The same applies to the subsequent figures.

[0041] The electrodes 3A and 3B each have edge portions 3Aa and 3Ba extending radially from the center point CP side. In the present embodiment, the edge portions 3Aa and 3Ba of the electrodes 3A and 3B linearly extend in a manner parallel to the center line CL1, respectively. Therefore, the gap GP1 between the electrodes 3A and 3B linearly extends in the Y-axis direction in a manner parallel to the center line CL1. In addition, the width of the gap GP1, that is, the distance between the electrodes 3A and 3B, is substantially equal at each position in the Y-axis direction.

[0042] Here, when viewed in the Z-axis direction (the first direction) in which the main surfaces 2a and 2b face each other, the inner peripheral portions of the electrodes 3A and 3B form predetermined angles θ1 and θ2. In addition, the inner peripheral portions of the electrodes 3A and 3B refer to the portions closest to the center point CP in the edge portions 3Aa and 3Ba of the electrodes 3A and 3B. In addition, the inner peripheral portions of each of the subsequent common electrodes 10 are the same portions. In the present embodiment, the angles θ1 and θ2 of the electrodes 3A and 3B are approximately 180°. In addition, in this specification, in the case of being referred to as "approximately XX°", it is assumed to be an angle within a range including XX° and allowing a deviation (for example, ± several degrees) caused by manufacturing errors starting from the XX°.

[0043] The component electrically connected to the first electrode 3A via solder is only the first lead terminal 6A. The component electrically connected to the second electrode 3B via solder is only the second lead terminal 6B. That is, other electronic components such as resistors or conductor components are not connected to the electrodes 3A and 3B via solder. When observed from the Z-axis direction, the front end portions 6a on the connection sides of the lead terminals 6A and 6B do not protrude from the electrodes 3A and 3B. That is, the front end portions 6a of the lead terminals 6A and 6B are connected to the electrodes 3A and 3B via solder and are not connected to other conductive components. The lead terminals 6A and 6B are led out from the electrodes 3A and 3B in a state where they expand in a manner that increases the distance between them. Specifically, the first lead terminal 6A extends in a state where it is inclined in a manner that as it faces the negative side of the Y-axis direction, it faces the positive side of the X-axis direction. The second lead terminal 6B extends in a state where it is inclined in a manner that as it faces the negative side of the Y-axis direction, it faces the negative side of the X-axis direction. However, the lead-out directions and shapes of the lead terminals 6A and 6B are not particularly limited. In addition, since both of the electrodes 3A and 3B are provided on the main surface 2a, both of the lead terminals 6A and 6B are provided on the main surface 2a side. Therefore, compared with the case where the lead terminals 6A and 6B are respectively provided on the main surfaces 2a and 2b, the shapes, lengths, etc. of the lead terminals 6A and 6B can be made the same. In addition, the size of the single-layer capacitor 1 in the Z-axis direction can also be reduced.

[0044] Next, the size of the single-layer capacitor 1 will be described. The thickness of the body 2 (the dimension in the Z-axis direction) can be 1.0 mm or less, preferably 0.6 mm or less. By setting it within such a range, the breakdown electric field strength of the single-layer capacitor 1 can be increased. The breakdown electric field strength is the value obtained by dividing the applied voltage that breaks down the single-layer capacitor 1 by the thickness of the dielectric (the body 2). In addition, the lower limit value of the thickness of the body 2 is not particularly limited, and for example, it can be 0.1 mm or more. By setting it within such a range, the breakdown electric field strength can be increased within the range where it can be manufactured as a single-layer capacitor. The diameter of the body 2 can be 7 mm or more, preferably 10 mm or more. By setting it within such a range, even when the single-layer capacitor 1 is divided into a plurality of capacitor portions, the capacitance can be ensured. The upper limit value of the diameter of the body 2 is not particularly limited and can be 20 mm or less. By setting it within such a range, it is possible to suppress the influence of the single-layer capacitor 1 being too large on the installation. The distance between the electrodes in the gap GP1 can be 0.5 mm or more, preferably 1 mm or more. By setting it within such a range, the insulation between the electrodes can be more reliably ensured. In addition, the upper limit value of the distance between the electrodes is not particularly limited and can be 2 mm or less. By setting it within such a range, it is possible to suppress the increase of the portion that does not contribute to the capacitance. The relative dielectric constant of the body 2 is not particularly limited and can be a conventional dielectric used for ceramic capacitors (for example, 10 or more). In addition, the thicknesses of the electrodes 3A and 3B and the common electrode 10A are not particularly limited and can be set to 0.1 μm or more and 10 μm or less, etc.

[0045] As described above, between the electrodes 3A and 3B, no components such as resistors and conductor components for electrically connecting the two are provided. In the gap GP1 between the first electrode 3A and the second electrode 3B, the exterior resin 7 is disposed over substantially the entire area (refer to Figure 2 ). As described above, the first electrode 3A and the second electrode 3B are insulated from each other on the surface (main surfaces 2a and 2b and outer peripheral surface 2c) of the body 2. In the present embodiment, the first electrode 3A and the second electrode 3B are insulated from each other on the main surface 2a.

[0046] With the above-described structure, the first capacitor unit 21 is formed by the first electrode 3A and the common electrode 10A being opposed to each other in the Z-axis direction via the body 2. The second capacitor unit 22 is formed by the second electrode 3B and the common electrode 10A being opposed to each other via the body 2. Here, the portion of the common electrode 10A that faces the gap GP1 functions as a connection portion 31 for electrically connecting the first capacitor unit 21 and the second capacitor unit 22. Therefore, the first capacitor unit 21 and the second capacitor unit 22 are connected in series via the connection portion 31 of the common electrode 10A.

[0047] Here, in the present embodiment, when viewed from the Z-axis direction, the area of the first electrode 3A is substantially equal to the area of the second electrode 3B. Therefore, the relative areas of the electrodes 3A and 3B and the common electrode 10A in the two capacitor units 21 and 22 are substantially equal to each other.

[0048] The flow of current will be described. The current introduced into the first electrode 3A via the lead terminal 6A flows through the first capacitor unit 21 to the common electrode 10A ( Figure 3B FA1). The current in the common electrode 10A flows from the first capacitor unit 21 side to the second capacitor unit 22 side via the connection portion 31 ( Figure 3B , Figure 3C FA2). The current is introduced into the second electrode 3B through the second capacitor unit 22 ( Figure 3B FA3), and flows to the lead terminal 6B.

[0049] Next, the operation and effects of the single-board capacitor 1 of the present embodiment will be described.

[0050] Here, the breakdown voltage tolerance of the single-layer capacitor 1 will be described. The breakdown voltage tolerance is a parameter for evaluating the height of the voltage at the time of breakdown by applying a voltage until the product breaks down. A ceramic capacitor has the property that the thinner the dielectric thickness, the higher the value obtained by dividing the applied voltage that causes breakdown by the dielectric thickness (breakdown electric field strength). When capacitors are arranged in series and a voltage is applied, the voltage is applied separately to each capacitor. The voltage applied to each capacitor is proportional to the reciprocal of the capacitance of each capacitor. For example, if the capacitances of two capacitors are the same, the voltage becomes 1 / 2 by series connection. When considering a capacitor (complex) with a thinner dielectric thickness and an increased number of series connections, the breakdown voltage tolerance of each capacitor becomes smaller due to the thinner dielectric, but by adopting a series structure, the applied voltage decreases according to the number of series connections. Thus, as described above, the breakdown electric field strength increases as the dielectric thickness becomes thinner. Therefore, when considering the increase and decrease of the applied voltage and the increase in the breakdown electric field strength due to thinning, the capacitor with a series structure can sometimes improve the breakdown voltage tolerance of the entire structure.

[0051] The single-layer capacitor 1 according to this embodiment includes a first lead terminal 6A connected to the first electrode 3A and a second lead terminal 6B connected to the second electrode 3B. Therefore, the single-layer capacitor 1 can be mounted on a circuit board through the lead terminals 6A and 6B. In addition to these first electrode 3A and second electrode 3B, the single-layer capacitor 1 further includes a common electrode portion 4. The first capacitor portion 21 is formed by the first electrode 3A and the common electrode portion 4 facing each other via the body 2. In addition, the second capacitor portion 22 is formed by the second electrode 3B and the common electrode portion 4 facing each other via the body 2. These first capacitor portions 21 and second capacitor portions 22 are connected in series. On the other hand, the first electrode 3A and the second electrode 3B are insulated from each other on the surface of the body 2, so that current flow between the two can be suppressed. Therefore, the current flowing between the first electrode 3A and the second electrode 3B to which the lead terminals 6A and 6B are connected does not flow directly between the electrodes, but can flow through the first capacitor portion 21 and the second capacitor portion 22. In this way, a plurality of capacitor portions 21 and 22 connected in series can be formed in one body 2. Since the voltage applied to each of the capacitor portions 21 and 22 can be reduced, the voltage tolerance of the single-layer capacitor 1 can be improved. As described above, the voltage tolerance of the single-layer capacitor 1 can be improved. In addition, as described above, by increasing the number of series connections of the capacitor portions and making the thickness of the body 2 thinner, the voltage tolerance can be further improved.

[0052] Alternatively, the first electrode 3A and the second electrode 3B may be provided on one main surface 2a, the common electrode portion 4 may be provided on the other main surface 2b, and the common electrode 10A facing the first electrode 3A and the second electrode 3B may be provided. The first capacitor portion 21 and the second capacitor portion 22 are connected in series via the common electrode 10A, and the first electrode 3A and the second electrode 3B are insulated from each other on one main surface 2a. In this way, two directly connected capacitor portions 21 and 22 can be formed in one element body 2.

[0053] The external resin 7 may also be disposed between the first electrode 3A and the second electrode 3B. In this case, a short circuit or the like between the first electrode 3A and the second electrode 3B can be suppressed, and the voltage tolerance of the single-plate capacitor 1 can be improved.

[0054] The component electrically connected to the first electrode 3A via solder may be only the first lead terminal 6A. That is, a resistor or the like is not connected to the first electrode 3A. In this case, the generation of parasitic capacitance between the first electrode 3A and the second electrode 3B can be suppressed, and the capacitor portions 21 and 22 connected in series can be formed.

[0055] The relative areas of the electrodes 3A and 3B and the common electrode 10A in the plurality of capacitor portions 21 and 22 may be substantially equal to each other. In this case, the electrostatic capacitance in each of the capacitor portions 21 and 22 can be made substantially equal, and by making the voltages related to the respective capacitor portions 21 and 22 substantially equal, short-circuit defects and the like in any of the capacitor portions 21 and 22 can be suppressed and breakdown can be suppressed. For example, when the difference in electrostatic capacitance between a plurality of capacitors is large, voltage unevenness may increase.

[0056] The present invention is not limited to the above-described embodiments.

[0057] For example, the single-plate capacitor 1 of the above-described embodiment has a series connection structure of two capacitor portions. Instead, the single-plate capacitor 1 may also have a series connection structure of three or more capacitor portions. That is, the common electrode portion 4 may have a plurality of common electrodes 10, and the plurality of common electrodes 10 face each other via the element body 2. In this case, by using the plurality of common electrodes 10, three or more capacitor portions can be formed. In addition, in the description of the following modification examples, the description of the parts common to the single-plate capacitor 1 of the above-described embodiment is omitted, but the same functions and effects can also be obtained for the common structure.

[0058] For example, it is also possible to adopt Figure 4Structure of the single-layer capacitor 1 shown. The common electrode portion 4 has a first common electrode 10B and a second common electrode 10C. The first capacitor portion 21 is formed by opposing the first electrode 3A and the first common electrode 10B via the element body 2. The second capacitor portion 22 is formed by opposing the second electrode 3B and the second common electrode 10C via the element body 2. The third capacitor portion 23 is formed by opposing the first common electrode 10B and the second common electrode 10C via the element body 2. In this case, three capacitor portions 21, 22, and 23 connected in series can be formed in one element body 2.

[0059] The first electrode 3A and the second common electrode 10C are provided on one main surface 2a (refer to Figure 4 (a) and (b) of the figure), and the second electrode 3B and the first common electrode 10B are provided on the other main surface 2b ( Figure 4 (b) and (c) of the figure). In this case, the first lead terminal 6A is arranged on the side of one main surface 2a, and the second lead terminal 6B is arranged on the side of the other main surface 2b. Thus, a structure in which the element body 2 is sandwiched by the lead terminals 6A and 6B can be provided. Therefore, the thickness of the exterior resin 7 at each of the main surfaces 2a and 2b can be made uniform.

[0060] The shape of the second common electrode 10C on the main surface 2a is the same as that of Figure 3A the second electrode 3B shown in the figure. As shown in Figure 4 (a) of the figure, the second common electrode 10C has a rim portion 10Ca extending radially from the center point CP side. In the present embodiment, the rim portion 10Ca extends linearly in a manner parallel to CL1. Therefore, the gap GP2 between the electrodes 3A and 10C extends linearly in the Y-axis direction in a manner parallel to the center line CL1. In addition, the width of the gap GP2, that is, the distance between the electrodes 3A and 10C, is substantially equal at each position in the Y-axis direction.

[0061] As shown in Figure 4As shown in (c), with respect to the main surface 2b, a reference line SL1 extending toward the negative side in the X-axis direction is set from the center point CP. At this time, the gap GP3 between the second electrode 3B and the first common electrode 10B has an L-shaped configuration. The gap GP3 has a portion extending from the center point CP along the reference line SL1 toward the negative side in the X-axis direction and a portion extending from the center point CP along the center line CL1 toward the negative side in the Y-axis direction. The second electrode 3B and the first common electrode 10B have edge portions 3Ba, 10Ba extending radially from the center point CP side. In the present embodiment, the edge portions 3Ba, 10Ba extend in an L-shape such that they are parallel to the reference line SL1 and the center line CL1 in each part. Therefore, the gap GP3 between the electrodes 3B, 10B extends linearly in the X-axis direction and the Y-axis direction such that it is parallel to the reference line SL1 and the center line CL1 in each part. Further, the width of the gap GP3, that is, the distance between the electrodes 3A, 10B is substantially equal at each position.

[0062] As Figure 4 shown in (a) and (c), when viewed from the Z-axis direction (first direction) in which the main surfaces 2a, 2b face each other, the inner peripheral portions of the electrodes 3A, 3B, the first common electrode 10B, and the second common electrode 10C form predetermined angles θ1, θ2, θ3, θ4. The angles θ1, θ4 of the first electrode 3A and the second common electrode 10C are approximately 180°. The angle θ3 of the first common electrode is approximately 270°. The angle θ2 of the second electrode 3B is approximately 90°.

[0063] As Figure 4 shown in (c), the portion of the first common electrode 10B that faces the gap GP2 functions as a connection portion 32 that electrically connects the first capacitor portion 21 and the third capacitor portion 23. Therefore, the first capacitor portion 21 and the third capacitor portion 23 are connected in series via the connection portion 32 of the common electrode 10B. As Figure 4 shown in (a), the portion of the common electrode 10C that faces the gap GP3 functions as a connection portion 33 that electrically connects the second capacitor portion 22 and the third capacitor portion 23. Therefore, the second capacitor portion 22 and the third capacitor portion 23 are connected in series via the connection portion 33 of the common electrode 10C.

[0064] The flow of current will be described. The current introduced to the first electrode 3A via the lead terminal 6A flows through the first capacitor portion 21 to the first common electrode 10B ( Figure 4 FB1 in (b)). The current flows from the first capacitor portion 21 side to the third capacitor portion 23 side within the first common electrode 10B via the connection portion 32 ( Figure 4 FB2 in (b) and (c)). The current flows through the third capacitor portion 23 to the second common electrode 10C ( Figure 4(b) of FB3). The current flows from the third capacitor section 23 side to the second capacitor section 22 side via the connection section 33 within the second common electrode 10C( Figure 4 (a) of FB4). The current is introduced into the second electrode 3B through the capacitor section 22 Figure 4 (b) of FC5), and flows to the lead terminal 6B.

[0065] In addition, as the series connection structure of the three capacitor sections 21, 22, and 23, the structure shown in Figure 5 may also be adopted.

[0066] As shown in Figure 5 (a), a reference line SL2 is set so as to extend in a manner that inclines toward the positive side in the Y-axis direction as it moves from the center point CP toward the positive side in the X-axis direction with respect to the main surface 2a. At this time, the gap GP2 between the first electrode 3A and the second common electrode 10C has a V-shaped configuration. The gap GP2 has a portion that extends in a manner that inclines from the center point CP along the reference line SL2 toward the positive side in the X-axis direction, and a portion that extends from the center point CP along the center line CL1 toward the negative side in the Y-axis direction. The first electrode 3A and the second common electrode 10C have edge portions 3Aa, 10Ca that extend radially from the center point CP side. In the present embodiment, the edge portions 3Aa, 10Ca extend in a V shape such that they are parallel to the reference line SL2 and the center line CL1 in each portion. Therefore, the gap GP2 between the electrodes 3A, 10C extends linearly in the direction inclined with respect to the X-axis direction and in the Y-axis direction such that it is parallel to the reference line SL2 and the center line CL1 in each portion. In addition, the width of the gap GP2, that is, the distance between the electrodes 3A, 10C, is substantially equal at each position.

[0067] As shown in Figure 5As shown in (c), a reference line SL2 is set to extend in a manner that slopes toward the positive side in the Y-axis direction as it moves from the center point CP toward the negative side in the X-axis direction with respect to the main surface 2b. At this time, the gap GP3 between the second electrode 3B and the first common electrode 10B has a V-shaped configuration. The gap GP3 has a portion that extends in a manner that slopes from the center point CP along the reference line SL1 toward the negative side in the X-axis direction and a portion that extends from the center point CP along the center line CL1 toward the negative side in the Y-axis direction. The second electrode 3B and the first common electrode 10B have edge portions 3Ba, 10Ba that extend radially from the center point CP side. In the present embodiment, the edge portions 3Ba, 10Ba extend in a V-shape such that they are parallel to the reference line SL1 and the center line CL1 in each part. Therefore, the gap GP3 between the electrodes 3B, 10B extends linearly in the direction inclined with respect to the X-axis direction and in the Y-axis direction such that it is parallel to the reference line SL1 and the center line CL1 in each part. In addition, the width of the gap GP3, that is, the distance between the electrodes 3B, 10B is substantially equal at each position.

[0068] As shown in Figure 5 (a) and (c), when viewed from the Z-axis direction (first direction) in which the main surfaces 2a, 2b face each other, the inner peripheral portions of the electrodes 3A, 3B, the first common electrode 10B, and the second common electrode 10C form predetermined angles θ1, θ2, θ3, θ4. The angles θ1, θ2 of the first electrode 3A and the second electrode 3B are approximately 120°. The angles θ3, θ4 of the first common electrode 10B and the second common electrode 10C are approximately 240°.

[0069] In the present embodiment, the relative areas of the electrodes 3A, 3B and the common electrodes 10B, 10C in the plurality of capacitor portions 21, 22, 23 are substantially equal to each other. In this case, it is possible to make the electrostatic capacitances in the respective capacitor portions 21, 22, 23 substantially equal, and by making the voltages related to the respective capacitor portions 21, 22, 23 substantially equal, it is possible to suppress short-circuit defects and the like in any of the capacitor portions 21, 22, 23 and suppress breakdown.

[0070] In addition, Figure 5 the other structures and the flow of current in the structure of Figure 4 are of the same gist as the structure of

[0071] Furthermore, it is also possible to adopt Figure 6The single-plate capacitor 1 shown. The common electrode portion 4 has a first common electrode 10B, a second common electrode 10C, and a third common electrode 10D. The first capacitor portion 21 is formed by opposing the first electrode 3A and the first common electrode 10B via the substrate 2. The second capacitor portion 22 is formed by opposing the second electrode 3B and the second common electrode 10C via the substrate 2. The fourth capacitor portion 24 is formed by opposing the first common electrode 10B and the third common electrode 10D via the substrate 2. The fifth capacitor portion 25 is formed by opposing the second common electrode 10C and the third common electrode 10D via the substrate 2. In this case, four capacitor portions connected in series can be formed in one substrate 2.

[0072] The first electrode 3A, the second electrode 3B, and the third common electrode 10D are provided on one main surface 2a, and the first common electrode 10B and the second common electrode 10C are provided on the other main surface 2b. Thus, a structure can be provided in which the two lead terminals 6A, 6B are arranged on the side of the one main surface 2a. Therefore, the shapes, lengths, etc. of the lead terminals 6A, 6B can be made the same.

[0073] As Figure 6 As shown in (a) of, a reference line SL3 extending in the X-axis direction from the center point CP is set with respect to the main surface 2a. At this time, the gap GP4 between the third common electrode 10D and the electrodes 3A, 3B has a shape extending linearly in the X-axis direction. The third common electrode 10D has a peripheral portion 10Da extending from the center line side to the radial direction. The gap GP1 between the electrodes 3A, 3B has a shape extending linearly from the center point CP to the negative side in the X-axis direction. In the present embodiment, the peripheral portions 3Aa, 3Ba of the electrodes 3A, 3B have an L-shaped shape having a portion extending linearly in a direction parallel to the center line CL1 and a portion extending linearly in a direction parallel to the reference line SL3. The peripheral portion 10Da of the third common electrode 10D extends linearly in a direction parallel to the reference line SL3. Therefore, the gap GP1 between the electrodes 3A, 3B extends linearly in the Y-axis direction in a direction parallel to the center line CL1. In addition, the width of the gap GP1, that is, the distance between the electrodes 3A, 3B is substantially equal at each position in the Y-axis direction. The gap GP4 between the electrodes 3A, 3B and the third common electrode 10D extends linearly in the X-axis direction in a direction parallel to the reference line SL3. In addition, the width of the gap GP4, that is, the distance between the electrodes 3A, 3B and the third common electrode 10D is substantially equal at each position in the X-axis direction.

[0074] As Figure 6As shown in (c), in the main surface 2b, the first common electrode 10B and the second common electrode 10C each have edge portions 10Ba and 10Ca extending radially from the center point CP side. In the present embodiment, the edge portions 10Ba and 10Ca of the common electrodes 10B and 10C extend linearly in a manner parallel to the center line CL1. Therefore, the gap GP5 between the common electrodes 10B and 10C extends linearly in the Y-axis direction in a manner parallel to the center line CL1. In addition, the width of the gap GP5, that is, the distance between the common electrodes 10B and 10C, is substantially equal at each position in the Y-axis direction.

[0075] As Figure 6 shown in (a) and (c), when viewed from the Z-axis direction (the first direction) in which the main surfaces 2a and 2b face each other, the inner peripheral side portions of the first electrode 3A, the second electrode 3B, the first common electrode 10B, the second common electrode 10C, and the third common electrode 10D may form predetermined angles θ1, θ2, θ3, θ4, and θ5. The angles θ1 and θ2 of the first electrode 3A and the second electrode 3B are approximately 90°, and the angles θ3, θ4, and θ5 of the first common electrode 10B, the second common electrode 10C, and the third common electrode 10D are approximately 180°. In this case, the electrostatic capacitances of the four capacitor portions 21, 22, 24, and 25 can be made substantially equal. Therefore, uneven voltage tolerance in each capacitor portion can be suppressed.

[0076] As Figure 6 shown in (c), the portion of the first common electrode 10B facing the gap GP4 functions as a connection portion 34 that electrically connects the first capacitor portion 21 and the fourth capacitor portion 24. Therefore, the first capacitor portion 21 and the fourth capacitor portion 24 are connected in series via the connection portion 34 of the first common electrode 10B. The portion of the second common electrode 10C facing the gap GP4 functions as a connection portion 35 that electrically connects the second capacitor portion 22 and the fifth capacitor portion 25. Therefore, the second capacitor portion 22 and the fifth capacitor portion 25 are connected in series via the connection portion 35 of the second common electrode 10C. As Figure 6 shown in (a), the portion of the third common electrode 10D facing the gap GP5 functions as a connection portion 36 that electrically connects the fourth capacitor portion 24 and the fifth capacitor portion 25. Therefore, the fourth capacitor portion 24 and the fifth capacitor portion 25 are connected in series via the connection portion 36 of the third common electrode 10D.

[0077] The flow of current will be described. The current introduced into the first electrode 3A via the lead terminal 6A flows through the first capacitor portion 21 to the first common electrode 10B ( Figure 6(b) of FC1). The current flows from the first capacitor section 21 side to the fourth capacitor section 24 side via the connection section 34 within the first common electrode 10B ( Figure 6 (c) of FC2). The current flows through the fourth capacitor section 24 to the third common electrode 10D ( Figure 6 (b) of FC3). The current flows from the fourth capacitor section 24 side to the fifth capacitor section 25 side via the connection section 36 within the third common electrode 10D ( Figure 6 (a) of FC4). The current flows through the capacitor section 25 to the second common electrode 10C ( Figure 6 (b) of FC5). The current flows from the fifth capacitor section 25 side to the second capacitor section 22 side via the connection section 35 within the second common electrode 10C ( Figure 6 (c) of FC6). The current is introduced into the second electrode 3B through the capacitor section 22 ( Figure 6 (b) of FC7), and flows to the lead terminal 6B.

[0078] The relative areas of the electrodes 3A and 3B in the plurality of capacitor sections 21, 22, 24, 25 and the common electrodes 10B, 10C, 10D can be substantially equal to each other. In this case, the electrostatic capacitance in each of the capacitor sections 21, 22, 24, 25 can be made substantially equal, and by making the voltages related to each of the capacitor sections 21, 22, 24, 25 substantially equal, it is possible to suppress short-circuit defects and the like in any of the capacitor sections 21, 22, 24, 25 and to suppress breakdown.

[0079] Next, with reference to Figure 8 , the evaluation results and simulation results of the examples and comparative examples will be described. As Comparative Example 1, the single-plate capacitor 200 shown in Figure 7 can be adopted. The single-plate capacitor 200 of Comparative Example 1 has a first electrode 3A and a second electrode 3B covering the front surfaces of both sides of the substrate 2. The single-plate capacitor 200 has one capacitor section. The diameter and thickness of the substrate 2 are set to the values shown in Figure 8 . As Examples 1 and 2, the single-plate capacitor shown in Figures 3A - 3C was adopted, which has a structure in which two capacitor sections are connected in series. As Examples 3 and 4, the single-plate capacitor shown in Figure 5 was adopted, which has a structure in which three capacitor sections are connected in series. As Examples 5 and 6, the single-plate capacitor shown in Figure 6 was adopted, which has a structure in which four capacitor sections are connected in series. In addition, the diameters of Examples 1, 3, 5 are the same as that of Comparative Example 1, and the diameters of the substrates of Examples 2, 4, 6 are larger than that of Comparative Example 1. In addition, as the number of series-connected capacitors increases, the thickness of the substrate is made thinner in an inverse relationship with the increase ratio of the number of series-connected capacitors.

[0080] The "breakdown voltage ratio" and "capacitance ratio" were measured for Comparative Example 1 and each of the Examples. The "breakdown voltage characteristic" is a parameter for evaluating the height of the voltage at breakdown when a voltage is applied until the product breaks down. In addition, the "breakdown voltage ratio" and "capacitance ratio" of Examples 1 to 6 represent the ratios when the value of Comparative Example 1 is set to "1". Further, as the breakdown voltage ratio, measurement methods such as "AC-Vb" and "impact withstand voltage" were adopted. The "AC-Vb" is a measurement method in which the voltage applied to the sample is increased as an alternating current of 50 Hz and the voltage at breakdown is recorded. The "impact withstand voltage" is a measurement method in which the voltage is increased using a measurement method based on the conditions described in "JIS C504-14:2014" and the voltage at breakdown is recorded. As Figure 8 shown, it was confirmed that by increasing the number of series and thinning the thickness of the body (0.6 mm or less), the breakdown voltage ratio can be increased to more than the dispersion effect of the withstand voltage caused by series connection in both "AC-Vb" and "impact withstand voltage". In addition, regarding the capacitance ratio, from the results of Examples 2, 4, and 6, it was confirmed that by increasing the diameter of the body (10 mm or more), a capacitance ratio equivalent to that of Comparative Example 1 can be obtained together with the effect of thinning the thickness.

[0081] The present invention is not limited to the above-described embodiments.

[0082] The structures of the above-described embodiments and modification examples are merely examples and can be appropriately changed within the scope of the gist of the present invention. For example, the number of series is illustrated up to four, but a larger number of series can also be adopted.

[0083] (Mode 1)

[0084] A capacitor, wherein,

[0085] comprises:

[0086] a body having a pair of main surfaces facing each other;

[0087] a first electrode, a second electrode, and a common electrode portion provided on any one of the main surfaces of the body;

[0088] a first lead terminal connected to the first electrode by solder; and

[0089] a second lead terminal connected to the second electrode by solder,

[0090] the first capacitor portion is formed by the first electrode and the common electrode portion facing each other via the body,

[0091] the second capacitor portion is formed by the second electrode and the common electrode portion facing each other via the body,

[0092] The first capacitor section and the second capacitor section are connected in series.

[0093] The first electrode and the second electrode are insulated from each other on the surface of the element body.

[0094] (Mode 2)

[0095] The capacitor according to Mode 1, wherein

[0096] The first electrode and the second electrode are provided on one of the main surfaces.

[0097] The common electrode section is provided on the other main surface and has a common electrode facing the first electrode and the second electrode.

[0098] The first capacitor section and the second capacitor section are connected in series via the common electrode.

[0099] The first electrode and the second electrode are insulated from each other on the one main surface.

[0100] (Mode 3)

[0101] The capacitor according to Mode 1 or 2, wherein

[0102] The common electrode section has a plurality of common electrodes, and the plurality of common electrodes face each other via the element body.

[0103] (Mode 4)

[0104] The capacitor according to Mode 3, wherein

[0105] The common electrode section has a first common electrode and a second common electrode.

[0106] The first capacitor section is formed by the first electrode and the first common electrode facing each other via the element body.

[0107] The second capacitor section is formed by the second electrode and the second common electrode facing each other via the element body.

[0108] The third capacitor section is formed by the first common electrode and the second common electrode facing each other via the element body.

[0109] (Mode 5)

[0110] The capacitor according to Mode 4, wherein

[0111] When viewed in a first direction in which the pair of main surfaces face each other, portions on the inner peripheral sides of the first electrode, the second electrode, the first common electrode, and the second common electrode form a prescribed angle.

[0112] The angle between the first electrode and the second electrode is approximately 120°.

[0113] The angle between the first common electrode and the second common electrode is approximately 240°.

[0114] (Mode 6)

[0115] The capacitor according to Mode 4 or 5, wherein

[0116] The first electrode and the second common electrode are provided on one of the main surfaces,

[0117] The second electrode and the first common electrode are provided on the other main surface.

[0118] (Mode 7)

[0119] The capacitor according to Mode 3, wherein

[0120] The common electrode portion has a first common electrode, a second common electrode, and a third common electrode,

[0121] The first capacitor portion is formed by the first electrode and the first common electrode facing each other via the element body,

[0122] The second capacitor portion is formed by the second electrode and the second common electrode facing each other via the element body,

[0123] The fourth capacitor portion is formed by the first common electrode and the third common electrode facing each other via the element body,

[0124] The fifth capacitor portion is formed by the second common electrode and the third common electrode facing each other via the element body.

[0125] (Mode 8)

[0126] The capacitor according to Mode 7, wherein

[0127] When viewed from the first direction in which the pair of main surfaces face each other, the inner peripheral portions of the first electrode, the second electrode, the first common electrode, the second common electrode, and the third common electrode form a specified angle,

[0128] The angle between the first electrode and the second electrode is approximately 90°,

[0129] The angle between the first common electrode, the second common electrode, and the third common electrode is approximately 180°.

[0130] (Mode 9)

[0131] The capacitor according to Mode 7 or 8, wherein,

[0132] The first electrode, the second electrode, and the third common electrode are disposed on one of the main surfaces,

[0133] The first common electrode and the second common electrode are disposed on the other main surface.

[0134] (Mode 10)

[0135] The capacitor according to any one of Modes 1 to 9, wherein,

[0136] An external resin is disposed between the first electrode and the second electrode.

[0137] (Mode 11)

[0138] The capacitor according to any one of Modes 1 to 10, wherein,

[0139] The component electrically connected to the first electrode via solder is only the first lead terminal.

[0140] (Mode 12)

[0141] The capacitor according to any one of Modes 1 to 11, wherein,

[0142] The relative areas of the electrodes and the common electrodes in the plurality of capacitor portions are substantially equal to each other.

Claims

1. A capacitor, wherein: have: A body having a pair of main surfaces facing each other; A first electrode, a second electrode, and a common electrode portion provided on any of the main surfaces of the element body; a first lead terminal connected to the first electrode by solder; as well as a second lead terminal connected to the second electrode by solder, The first electrode and the common electrode portion are opposed to each other via the element body, thereby forming a first capacitor portion. The second electrode and the common electrode portion are opposed to each other via the element body, thereby forming a second capacitor portion. The first capacitor unit and the second capacitor unit are connected in series, The first electrode and the second electrode are insulated from each other on the surface of the element body.

2. The capacitor according to claim 1, wherein The first electrode and the second electrode are provided on one of the main surfaces. The common electrode portion is provided on the other main surface and includes a common electrode facing the first electrode and the second electrode. The first capacitor unit and the second capacitor unit are connected in series via the common electrode. The first electrode and the second electrode are insulated from each other on the one main surface.

3. The capacitor according to claim 1, wherein The common electrode portion includes a plurality of common electrodes, and the plurality of common electrodes face each other via the element body.

4. The capacitor according to claim 3, wherein: The common electrode portion includes a first common electrode and a second common electrode, The first electrode and the first common electrode are opposed to each other via the element body, thereby forming the first capacitor portion. The second capacitor portion is formed by the second electrode and the second common electrode facing each other via the element body. The first common electrode and the second common electrode face each other via the element body, thereby forming a third capacitor unit.

5. The capacitor according to claim 4, wherein: When viewed from a first direction opposite to the pair of main surfaces, the first electrode, the second electrode, the first common electrode, and the inner peripheral portion of the second common electrode form a predetermined angle. The angle between the first electrode and the second electrode is approximately 120°. The angle between the first common electrode and the second common electrode is approximately 240°.

6. The capacitor according to claim 4, wherein: The first electrode and the second common electrode are provided on one of the main surfaces. The second electrode and the first common electrode are provided on the other main surface.

7. The capacitor according to claim 3, wherein: The common electrode portion includes a first common electrode, a second common electrode and a third common electrode. The first electrode and the first common electrode are opposed to each other via the element body, thereby forming the first capacitor portion. The second capacitor portion is formed by the second electrode and the second common electrode facing each other via the element body. The first common electrode and the third common electrode are opposed to each other via the element body, thereby forming a fourth capacitor portion. The second common electrode and the third common electrode face each other via the element body, thereby forming a fifth capacitor unit.

8. The capacitor according to claim 7, wherein: When viewed from a first direction opposite to the pair of main surfaces, the first electrode, the second electrode, the first common electrode, the second common electrode, and the inner peripheral portion of the third common electrode form a predetermined angle. The angle between the first electrode and the second electrode is approximately 90°. The angle between the first common electrode, the second common electrode and the third common electrode is approximately 180°.

9. The capacitor according to claim 7, wherein: The first electrode, the second electrode, and the third common electrode are provided on one of the main surfaces. The first common electrode and the second common electrode are provided on the other main surface.

10. The capacitor according to claim 1, wherein An exterior resin is disposed between the first electrode and the second electrode.

11. The capacitor according to claim 1, wherein The only component electrically connected to the first electrode via solder is the first lead terminal.

12. The capacitor according to any one of claims 1 to 11, wherein: The facing areas of the electrodes in the plurality of capacitor portions and the common electrode are substantially equal to each other.

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