Electronic component

Abstract

To provide an electronic component that can relieve stress at a corner part of an internal electrode while suppressing an electrostrictive crack.SOLUTION: A first internal electrode 11 and a second internal electrode 13 face each other through a different-material layer 21 formed of a material different from that of an element assembly 2 in a second direction D2. By overlapping the different-material layer 21 in addition to the internal electrodes 11 and 13 in this manner, the volume of a member whose linear expansion coefficient is larger than that of the element assembly 2 is increased; thus, compression stress can be introduced to a side gap part SG between the internal electrodes 11 and 13 and side surfaces 2e and 2f of the element assembly 2. Accordingly, even if the electrostrictive vibration occurs at the voltage application, reducing the tensile stress at a central part of the side gap part SG in the second direction D2 makes it possible to suppress the occurrence of the electrostrictive crack. When seen from the second direction D2, the different-material layer does not overlap with a corner part CN of the internal electrodes 11 and 13. Therefore, the stress can be relieved at the corner part CN of the internal electrodes 11 and 13 of the outermost layer.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to electronic components. [Background technology]

[0002] There is known an electronic component that includes an element body having a pair of end faces facing each other, a pair of terminal electrodes arranged on the pair of end faces, and internal electrodes connected to each of the terminal electrodes (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2000-124064 Summary of the Invention [Problem to be solved by the invention]

[0004] In the electronic components described above, when voltage is applied, electrostriction causes volume changes where the internal electrodes overlap, which can lead to cracks in the side gaps. One method for preventing such electrostrictive cracks is to increase the volume of the internal electrodes. However, increasing the volume by thinning the dielectric layers can lead to degradation under high temperature loads. Furthermore, measures to prevent electrostrictive cracks can increase stress at the corners of the internal electrodes.

[0005] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide an electronic component that can suppress electrostrictive cracks and also relieve stress at the corners of internal electrodes. [Means for solving the problem]

[0006] The electronic component comprises an element body having a pair of end faces facing each other in a first direction, a first terminal electrode arranged on the end face on one side in the first direction, a second terminal electrode arranged on the end face on the other side in the first direction, a first internal electrode arranged within the element body and connected to the first terminal electrode, a second internal electrode arranged within the element body and connected to the second terminal electrode, and a heterogeneous material layer arranged within the element body and made of a material different from that of the element body, wherein the first internal electrode and the second internal electrode face each other via the heterogeneous material layer in a second direction perpendicular to the first direction, the heterogeneous material layer having a linear expansion coefficient greater than the linear expansion coefficient of the element body, and the first internal electrode and the second internal electrode include corner portions located within the element body, and the heterogeneous material layer does not overlap the corner portions when viewed from the second direction.

[0007] In the electronic component, the first internal electrode and the second internal electrode face each other in the second direction via a dissimilar material layer made of a material different from that of the element body. By stacking the dissimilar material layer in addition to the internal electrodes in this way, the volume of the component with a higher linear expansion coefficient than the element body is increased, thereby introducing compressive stress into the side gap between the internal electrode and the side surface of the element body. This reduces the tensile stress in the center of the side gap in the second direction, even if electrostrictive vibration occurs when voltage is applied, thereby suppressing the occurrence of electrostrictive cracks. Furthermore, unlike multi-layered thin dielectric layers, this method can suppress electrostrictive cracks while suppressing deterioration under high temperature loads. Here, the dissimilar material layer does not overlap the corners of the internal electrodes when viewed from the second direction. Therefore, stress can be relieved at the corners of the outermost internal electrode. As a result, electrostrictive cracks can be suppressed and stress can be relieved at the corners of the internal electrodes.

[0008] The element body may be made of a ceramic material and the different material layer may be a metal layer, in which case the different material layer may have a higher linear expansion coefficient than the element body.

[0009] In the region where the first internal electrode and the second internal electrode overlap in the second direction, if the dimension in a third direction orthogonal to the first and second directions is W, the dimension in the third direction of the region in the corner portion that does not overlap with the different material layer may be W / 10 or more and W / 3 or less. In this case, the width of the region in the corner portion that does not overlap with the different material layer can be sufficiently ensured, and by preventing the region from becoming too wide, compressive stress can be sufficiently introduced into the side gap portion.

[0010] In the region where the first internal electrode and the second internal electrode overlap in the second direction, if the dimension in the first direction is L, the dimension in the first direction of the region at the corner that does not overlap with the different material layer may be L / 10 or more and L / 3 or less. In this case, the width of the region at the corner that does not overlap with the different material layer can be sufficiently ensured, and by preventing the region from becoming too wide, compressive stress can be sufficiently introduced into the side gap portion.

[0011] The dissimilar material layer may have a notch at a position corresponding to the corner portion, and the notch may have a shape that is receding from the corner portion toward the inner periphery as viewed from the second direction. Since the distance between the corner portion of the internal electrode and the edge of the notch in the dissimilar material layer can be increased, stress at the corner portion of the internal electrode can be alleviated.

[0012] The different material layer may have a notch at a position corresponding to the corner, and the notch may have a curved portion that forms a curve when viewed from the second direction. In this case, electric field concentration at the notch can be suppressed.

[0013] When viewed from the second direction, the curved portion may be curved so as to move away from the corner portion toward the inner periphery. In this case, the distance between the corner portion of the internal electrode and the edge of the notch in the different material layer can be increased, thereby alleviating stress at the corner portion of the internal electrode.

[0014] The corner portions may have a shape that protrudes outward, which can prevent electric field concentration at the corner portions.

[0015] The thickness of the different material layer may be greater than the thickness of the first internal electrode and the second internal electrode, in which case the breakdown voltage can be improved by increasing the thickness of the different material layer.

[0016] The thickness of the different material layer may be 1.3 times or more the thickness of the first internal electrode and the second internal electrode. In this case, by sufficiently increasing the thickness of the different material layer, the breakdown voltage can be improved.

[0017] The outer peripheral edge of the different material may be thicker than the inner peripheral region, in which case the inner peripheral region can be made thinner to prevent the element body from expanding.

[0018] The thickness of the periphery may be at least 1.3 times the thickness of the inner peripheral region, in which case the bulging of the element body can be suppressed by making the inner peripheral region sufficiently thin.

[0019] If a direction orthogonal to the first and second directions is defined as a third direction, the different material layer may have a smaller width in at least one of the first and second directions than the first and second internal electrodes, and may be arranged on the end side of the first and second internal electrodes in one direction as viewed from the second direction. In this case, the internal electrodes do not overlap with the different material layer near the center, thereby suppressing bulging of the element body.

[0020] The electronic component comprises an element body having a pair of end faces facing each other in a first direction, a first terminal electrode arranged on the end face on one side in the first direction, a second terminal electrode arranged on the end face on the other side in the first direction, a first internal electrode arranged within the element body and connected to the first terminal electrode, a second internal electrode arranged within the element body and connected to the second terminal electrode, and a compressive stress introduction layer arranged within the element body and introducing compressive stress into the element body, wherein the first internal electrode and the second internal electrode face each other in a second direction perpendicular to the first direction via the compressive stress introduction layer, and the compressive stress introduction layer introduces compressive stress into side gap portions between the first internal electrode and the second internal electrode and a side surface of the element body in a third direction perpendicular to the first and second directions, and the first internal electrode and the second internal electrode include corner portions located within the element body, and the compressive stress introduction layer does not overlap with the corner portions when viewed in the second direction.

[0021] In the electronic component, the first internal electrode and the second internal electrode face each other in the second direction via a compressive stress-introducing layer that introduces compressive stress into the element body. The stress-introducing layer can introduce compressive stress in the third direction into the side gap between the first and second internal electrodes and the side surface of the element body. This reduces the tensile stress in the center of the side gap in the second direction, even if electrostrictive vibration occurs when a voltage is applied, thereby suppressing the occurrence of electrostrictive cracks. Furthermore, unlike a multi-layered thin dielectric layer, electrostrictive cracks can be suppressed while suppressing deterioration under high-temperature loads. Here, when viewed from the second direction, the compressive stress-introducing layer does not overlap the corners of the internal electrodes. This enables stress relaxation at the corners of the outermost internal electrode. As a result, electrostrictive cracks can be suppressed and stress at the corners of the internal electrodes can be relaxed. [Effects of the Invention]

[0022] According to the present invention, it is possible to provide an electronic component that can suppress electrostrictive cracks and also relieve stress at the corners of the internal electrodes. [Brief explanation of the drawings]

[0023] [Figure 1]1 is a perspective view showing an electronic component according to an embodiment of the present invention. [Figure 2] FIG. 2 is a cross-sectional view taken along line II-II shown in FIG. [Figure 3] FIG. 2 is a cross-sectional view taken along line III-III shown in FIG. [Figure 4] FIG. 4 is a cross-sectional view of the first internal electrode as viewed from a second direction. [Figure 5] FIG. 4 is a cross-sectional view of the intermediate layer as viewed from a second direction. [Figure 6] FIG. 4 is a conceptual diagram showing a specific configuration of a cutout portion. [Figure 7] FIG. 4 is a conceptual diagram showing a specific configuration of a cutout portion. [Figure 8] FIG. 4 is a conceptual diagram showing a specific configuration of a cutout portion. [Figure 9] FIG. 4 is a conceptual diagram showing a specific configuration of a cutout portion. [Figure 10] FIG. 4 is a conceptual diagram showing a specific configuration of a cutout portion. [Figure 11] FIG. 4 is a conceptual diagram showing a specific configuration of a cutout portion. [Figure 12] FIG. 10 is a cross-sectional view showing an electronic component according to a modified example. [Figure 13] FIG. 10 is a cross-sectional view showing an electronic component according to a modified example. [Figure 14] FIG. 10 is a cross-sectional view showing an electronic component according to a modified example. [Figure 15] FIG. 10 is a cross-sectional view showing an electronic component according to a modified example. [Figure 16] 10 is a graph showing experimental results. [Figure 17] 10 is a table showing experimental results. [Figure 18] 10 is a graph showing experimental results. [Figure 19] 10 is a graph showing experimental results. DETAILED DESCRIPTION OF THE INVENTION

[0024] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description, the same elements or elements having the same functions will be denoted by the same reference numerals, and redundant description will be omitted.

[0025] The configuration of the electronic component according to this embodiment will be described with reference to Figs. 1 to 5. Fig. 1 is a perspective view showing the electronic component according to this embodiment. Figs. 2 and 3 are views for explaining the cross-sectional configuration of the multilayer capacitor according to this embodiment. Fig. 4 is a cross-sectional view of the first internal electrode 11 as viewed from the second direction D2. Fig. 5 is a cross-sectional view of the intermediate layer 20 as viewed from the second direction D2. In this embodiment, a multilayer capacitor C1 will be described as an example of the electronic component.

[0026] 1, the multilayer capacitor C1 includes a rectangular parallelepiped element body 2, and a first terminal electrode 5 and a second terminal electrode 7 disposed on the outer surface of the element body 2. The first terminal electrode 5 and the second terminal electrode 7 are spaced apart. The rectangular parallelepiped shape includes a rectangular parallelepiped shape with chamfered corners and ridges, and a rectangular parallelepiped shape with rounded corners and ridges.

[0027] The element body 2 has, as its outer surfaces, a pair of opposing end faces 2a, 2b, a pair of opposing main faces 2c, 2d, and a pair of opposing side faces 2e, 2f. In this embodiment, the direction in which the pair of end faces 2a, 2b face each other (first direction D1) is the length direction of the element body 2, the direction in which the pair of main faces 2c, 2d face each other (second direction D2) is the height direction of the element body 2, and the direction in which the pair of side faces 2e, 2f face each other (third direction D3) is the width direction of the element body 2.

[0028] The length of the element body 2 in the first direction D1 is greater than the length of the element body 2 in the second direction D2 and the length of the element body 2 in the third direction D3. The length of the element body 2 in the second direction D2 and the length of the element body 2 in the third direction D3 are equal. That is, in this embodiment, the pair of end faces 2a, 2b are square-shaped, and the pair of main faces 2c, 2d and the pair of side faces 2e, 2f are rectangular-shaped. The length of the element body 2 in the first direction D1 may be equal to the length of the element body 2 in the second direction D2 and the length of the element body 2 in the third direction D3. The length of the element body 2 in the second direction D2 and the length of the element body 2 in the third direction D3 may be different.

[0029] In addition to being equal, "equivalent" may also refer to values ​​that include slight differences or manufacturing errors within a preset range. For example, if multiple values ​​are within a range of ±5% of the average value of the multiple values, the multiple values ​​are defined as equivalent.

[0030] The pair of principal surfaces 2c, 2d extend in the first direction D1 to connect the pair of end surfaces 2a, 2b. The pair of principal surfaces 2c, 2d also extend in the third direction D3. The pair of side surfaces 2e, 2f extend in the first direction D1 to connect the pair of end surfaces 2a, 2b. The pair of side surfaces 2e, 2f also extend in the second direction D2.

[0031] The element body 2 is configured by stacking multiple dielectric layers 51 in the direction in which the pair of main surfaces 2c, 2d oppose each other (second direction D2). In the element body 2, the stacking direction of the multiple dielectric layers 51 (hereinafter simply referred to as the "stacking direction") coincides with the second direction D2. Each dielectric layer 51 is configured, for example, from a sintered ceramic green sheet containing a dielectric material (dielectric ceramic such as BaTiO3-based, Ba(Ti,Zr)O3-based, or (Ba,Ca)TiO3-based). In an actual element body 2, the dielectric layers 51 are integrated to the extent that the boundaries between the dielectric layers 51 are not visible. The third direction D3 may be the stacking direction.

[0032] As shown in FIGS. 2, 3, and 4, the multilayer capacitor C1 includes a plurality of first internal electrodes 11 and a plurality of second internal electrodes 13. The internal electrodes 11, 13 are made of a conductive material (e.g., Ni, Cu, Ag, Pt, etc.) that is typically used as an internal conductor for multilayer electronic components. The internal electrodes 11, 13 are formed as a sintered body of a conductive paste containing the conductive material. The internal electrodes 11, 13 function as internal conductors disposed within the element body 2.

[0033] The first internal electrodes 11 and the second internal electrodes 13 are arranged at different positions (layers) in the second direction D2. That is, the first internal electrodes 11 and the second internal electrodes 13 are arranged alternately (with intermediate layers 20, described later) so as to face each other at an interval in the second direction D2 within the element body 2. The first internal electrodes 11 and the second internal electrodes 13 have mutually different polarities.

[0034] As shown in FIG. 4, each first internal electrode 11 includes a main electrode portion 11A and a connection portion 11B. The main electrode portion 11A is a portion that forms a capacitance by facing a main electrode portion 13A of the second internal electrode 13 described below. The connection portion 11B is a portion that connects the main electrode portion 11A and the first terminal electrode 5. The connection portion 11B extends from one side (one short side) of the main electrode portion 11A and is exposed at the end face 2a. The first internal electrode 11 is exposed at the end face 2a and is not exposed at the end face 2b, the pair of main faces 2c and 2d, or the pair of side faces 2e and 2f. The main electrode portion 11A and the connection portion 11B are integrally formed.

[0035] As shown in FIG. 4, the main electrode portion 11A has a rectangular shape with its longer sides extending in the first direction D1 and its shorter sides extending in the third direction D3. That is, the length of the main electrode portion 11A of each first internal electrode 11 in the first direction D1 is greater than its length in the third direction D3. The connection portion 11B extends from the end of the main electrode portion 11A on the end face 2a side to the end face 2a. The length of the connection portion 11B in the first direction D1 is smaller than the length of the main electrode portion 11A in the first direction D1. The length of the connection portion 11B in the third direction D3 is equal to the length of the main electrode portion 11A in the third direction D3. The connection portion 11B is connected to the first terminal electrode 5 at an end exposed at the end face 2a. The length of the connection portion 11B in the third direction D3 may be smaller than the length of the main electrode portion 11A in the third direction D3.

[0036] As shown in FIG. 4 , each second internal electrode 13 includes a main electrode portion 13A and a connection portion 13B. The main electrode portion 13A faces a main electrode portion 11A of the first internal electrode 11 (described later) to form a capacitance. The connection portion 13B connects the main electrode portion 13A to the second terminal electrode 7. The main electrode portion 13A faces the main electrode portion 11A in the second direction D2 via a part (dielectric layer) of the element body 2. The connection portion 13B extends from one side (one short side) of the main electrode portion 13A and is exposed at the end face 2b. The second internal electrode 13 is exposed at the end face 2b and is not exposed at the end face 2a, the pair of main faces 2c and 2d, or the pair of side faces 2e and 2f. The main electrode portion 13A and the connection portion 13B are integrally formed.

[0037] As shown in FIG. 4 , the main electrode portion 13A has a rectangular shape with its longer sides extending in the first direction D1 and its shorter sides extending in the third direction D3. That is, the length of the main electrode portion 13A of each second internal electrode 13 in the first direction D1 is greater than its length in the third direction D3. The connection portion 13B extends from the end of the main electrode portion 13A on the end face 2b side to the end face 2b. The length of the connection portion 13B in the first direction D1 is smaller than the length of the main electrode portion 13A in the first direction D1. The length of the connection portion 13B in the third direction D3 is equal to the length of the main electrode portion 13A in the third direction D3. The connection portion 13B is connected to the second terminal electrode 7 at an end exposed at the end face 2b. The length of the connection portion 13B in the third direction D3 may be smaller than the length of the main electrode portion 13A in the third direction D3.

[0038] The first internal electrode 11 has an end 11a extending in the third direction D3 on the second terminal electrode 7 side, an end 11b extending in the first direction D1 on the side surface 2e side, and an end 11c extending in the first direction D1 on the side surface 2f side. The second internal electrode 13 has an end 13a extending in the third direction D3 on the first terminal electrode 5 side, an end 13b extending in the first direction D1 on the side surface 2e side, and an end 13c extending in the first direction D1 on the side surface 2f side. When viewed from the second direction D2, the end 11b and the end 13b overlap, and the end 11c and the end 13c overlap. When viewed from the second direction D2, the end 11a overlaps the boundary between the main electrode portion 13A and the connection portion 13B of the second internal electrode 13. When viewed from the second direction D2, the end 13a overlaps the boundary between the main electrode portion 11A and the connection portion 11B of the first internal electrode 11. A region E1 where the first internal electrode 11 and the second internal electrode 13 overlap in the second direction D2 is defined by the end 11a, the end 13a, the ends 11b and 13b, and the ends 11c and 13c.

[0039] The first internal electrode 11 and the second internal electrode 13 include corner portions CN located within the element body 2. The first internal electrode 11 has a corner portion CN at the point where the end portion 11a and the end portion 11b intersect, and has another corner portion CN at the point where the end portion 11a and the end portion 11c intersect. In addition, if the corner portion CN has a rounded corner or a chamfered portion, the rounded corner or the chamfered portion corresponds to the corner portion CN. Each corner portion CN is embedded in a position spaced inward from each face of the element body 2.

[0040] The first terminal electrode 5 is located at the end of the element body 2 on the end face 2a side when viewed in the first direction D1. The first terminal electrode 5 has an electrode portion 5a located on the end face 2a, an electrode portion 5b located on the pair of main faces 2c and 2d, and an electrode portion 5c located on the pair of side faces 2e and 2f. That is, the first terminal electrode 5 is formed on the five faces 2a, 2c, 2d, 2e, and 2f.

[0041] Adjacent electrode portions 5a, 5b, and 5c are electrically connected to one another at the ridges of element body 2. Electrode portions 5a and 5b are connected to one another at the ridges between end face 2a and each of main faces 2c and 2d. Electrode portions 5a and 5c are connected to one another at the ridges between end face 2a and each of side faces 2e and 2f.

[0042] The electrode portion 5a is arranged so as to cover all of the portions exposed on the end surface 2a of each connection portion 11B, and the connection portion 11B is directly connected to the first terminal electrode 5. In other words, the connection portion 11B connects the main electrode portion 11A and the electrode portion 5c. As a result, each first internal electrode 11 is electrically connected to the first terminal electrode 5.

[0043] The second terminal electrode 7 is located at the end of the element body 2 on the end face 2b side when viewed in the first direction D1. The second terminal electrode 7 has an electrode portion 7a located on the end face 2b, an electrode portion 7b located on the pair of main faces 2c and 2d, and an electrode portion 7c located on the pair of side faces 2e and 2f. That is, the second terminal electrode 7 is formed on the five faces 2b, 2c, 2d, 2e, and 2f.

[0044] Adjacent electrode portions 7a, 7b, and 7c are electrically connected to each other at the ridges of the element body 2. Electrode portions 7a and 7b are connected to each other at the ridges between the end face 2b and each of the main faces 2c and 2d. Electrode portions 7a and 7c are connected to each other at the ridges between the end face 2b and each of the side faces 2e and 2f.

[0045] The electrode portion 7a is disposed so as to cover all of the portions of each connecting portion 13B exposed on the end surface 2b, and the connecting portion 13B is directly connected to the second terminal electrode 7. That is, the connecting portion 13B connects the main electrode portion 13A and the electrode portion 7c. As a result, each second internal electrode 13 is electrically connected to the second terminal electrode 7.

[0046] 2 and 3, the multilayer capacitor C1 includes a plurality of intermediate layers 20 disposed within the element body 2. The intermediate layers 20 are disposed between the first internal electrode 11 and the second internal electrode 13 at different positions (layers) in the second direction D2. That is, the intermediate layers 20 are disposed so as to face the first internal electrode 11 and the second internal electrode 13 at an interval in the second direction D2 within the element body 2. The intermediate layers 20 are disposed spaced apart from the first terminal electrode 5 and the second terminal electrode 7 toward the inner periphery in the first direction D1, and are not electrically connected to them. In this embodiment, the intermediate layers 20 are disposed in the entire region between the first internal electrode 11 and the second internal electrode 13. However, the intermediate layers 20 may be omitted from some regions.

[0047] The intermediate layer 20 functions as a heterogeneous material layer 21 made of a material different from that of the element body 2. The intermediate layer 20 as the heterogeneous material layer 21 may be a metal layer. Ni, Cu, Ag, Pt, Au, and alloys thereof may be used as the material of the metal layer. The material of the intermediate layer 20 may be the same as or different from that of the internal electrodes 11, 13. The intermediate layer 20 is formed as a sintered body of a conductive paste containing the above-mentioned metal material.

[0048] The intermediate layer 20 as the different material layer 21 has a linear expansion coefficient that is larger than the linear expansion coefficient of the element body 2. Specifically, the linear expansion coefficient of the intermediate layer 20 as the different material layer 21 is 0.5×10 -6 K -1 or more, more preferably 2.0 × 10 -6 K -1 The upper limit of the linear expansion coefficient of the intermediate layer 20 as the different material layer 21 is not particularly limited, but is preferably 30.0×10 -6 K -1 The thickness of the intermediate layer 20 serving as the different material layer 21 may be greater than the thickness of the internal electrodes 11, 13. For example, the thickness of the intermediate layer 20 serving as the different material layer 21 may be 1.1 times or more, more preferably 1.3 times or more, the thickness of the internal electrodes 11, 13. There is no particular upper limit to the thickness of the intermediate layer 20 serving as the different material layer 21, but it may be 5.0 times or less the thickness of the internal electrodes 11, 13. The thickness of the internal electrodes 11, 13 may be set to 0.5 to 1.5 μm.

[0049] 5, when viewed from the second direction, the intermediate layer 20 overlaps with at least a part of the main electrode portion 11A of the first internal electrode 11. When viewed from the second direction, the intermediate layer 20 overlaps with at least a part of the main electrode portion 13A of the second internal electrode 13.

[0050] The intermediate layer 20 has an end 20a extending in the third direction D3 on the second terminal electrode 7 side, an end 20d extending in the third direction D3 on the first terminal electrode 5 side, an end 20b extending in the first direction D1 on the side surface 2e side, and an end 20c extending in the first direction D1 on the side surface 2f side. When viewed from the second direction D2, the end 20b overlaps with the ends 11b and 13b, and the end 20c overlaps with the ends 11c and 13c. When viewed from the second direction D2, the end 20a overlaps with the end 11a and the boundary between the main electrode portion 13A and the connection portion 13B of the second internal electrode 13. When viewed from the second direction D2, the end 20d overlaps with the end 13a and the boundary between the main electrode portion 11A and the connection portion 11B of the first internal electrode 11. Therefore, when viewed from the second direction, the intermediate layer 20 overlaps with at least a part of the region E1 (region generating capacitance) where the first internal electrode 11 and the second internal electrode 13 overlap in the second direction D2.

[0051] When viewed from the second direction D2, the intermediate layer 20 does not overlap the corner portions CN of the internal electrodes 11, 13. That is, when viewed from the second direction D2, the conductive pattern constituting the intermediate layer 20 is not present in the portions of the intermediate layer 20 corresponding to the corner portions CN. As a result, the corner portions CN of the internal electrodes 11, 13 and the areas near the corner portions CN do not face the intermediate layer 20 in the second direction D2. When viewed from the second direction D2, the ends of the portions of the intermediate layer 20 corresponding to the corner portions CN are arranged at a distance from the corner portions CN on the inner circumferential side in the first direction and on the inner circumferential side in the third direction.

[0052] In this embodiment, the intermediate layer 20 has cutouts 25 at positions corresponding to the four corners CN. The cutouts 25 are formed by cutting out the four corners (and their vicinity) of the intermediate layer 20 so that the intermediate layer 20 does not overlap the corners CN of the internal electrodes 11 and 13. A starting point P1 is set at an end (end 20a in FIG. 5) of the intermediate layer 20, spaced inward from the corners CN in the third direction D3. A starting point P2 is set at an end (end 20b in FIG. 5) of the intermediate layer 20, spaced inward from the corners CN in the first direction D1. The cutouts 25 have edges 26 that extend linearly or recessed inward between the starting points P1 and P2.

[0053] The intermediate layer 20 has notches 25 at locations corresponding to the corners between the ends 20a and 20b, the corners between the ends 20a and 20c, the corners between the ends 20d and 20b, and the corners between the ends 20d and 20c. Note that the term "notch 25" is a term indicating a shape and does not limit the method of formation; notches patterned into a desired shape using a conductor pattern also fall under the category of notch 25. Note that specific examples of notch 25 will be described later.

[0054] With the above-described configuration, the intermediate layer 20 functions as a compressive stress introduction layer 22 that introduces compressive stress into the element body 2. The compressive stress introduction layer 22 introduces compressive stress in the third direction D3 to the side gap region SG between the internal electrodes 11, 13 and the side surfaces 2e, 2f of the element body 2. As shown in FIG. 3 , the compressive stress introduction layer 22 introduces compressive stress F1 that compresses the side gap region SG in the second direction D2.

[0055] Next, specific examples of the cutout portion 25 will be described with reference to FIGS. 6 to 8. FIGS. 6 to 8 are schematic diagrams showing the structure near the corner portion CN when viewed from the second direction D2. Unless otherwise specified, the explanations of FIGS. 6 to 8 will be taken to describe the configuration when viewed from the second direction D2. In addition, in FIGS. 6 to 8, the locations where the internal electrodes 11 and 13 are present are marked with patterns, the portions where the internal electrodes 11 and 13 overlap are marked with dark patterns, and the portions where the intermediate layer 20 overlaps are marked with hatching. The same applies to FIGS. 9 to 11. FIGS. 6(a) and 6(b) show the configuration in a state where the intermediate layer 20 is not overlapped. As shown in FIGS. 6(a) and 6(b), the configuration near the corner portion CN between the end portion 11a and the end portions 11b and 13b is shown. The corner portion CN is formed by the corner R between the end portion 11a and the end portions 11b and 13b. The corner portion CN has a shape that protrudes toward the outer periphery. 6(b) shows a configuration in which a narrowed portion 13e is provided in the connection portion 13B of the second internal electrode 13. The narrowed portion 13e is a portion that makes the width of the connection portion 13B in the third direction D3 narrower than that of the main electrode portion 13A. The narrowed portion 13e is located closer to the inner periphery in the third direction than the end portion 13b.

[0056] The notch 25 shown in FIG. 6(c) has an edge 26 bent at a right angle between starting points P1 and P2 so as to recess toward the inner periphery. The edge 26 extends from starting point P1 in a first direction D1, then bends and extends in a third direction D3 to starting point P2. The notch 25 has a shape that extends away from the corner CN toward the inner periphery. Furthermore, a rounded corner is provided at the bent portion of the edge 26. Therefore, the notch 25 has a curved portion 27 when viewed from the second direction D2. Furthermore, rounded corners are provided at starting points P1 and P2, forming a curved portion. When viewed from the second direction D2, the curved portion 27 curves away from the corner CN toward the inner periphery. FIG. 6(d) shows a structure having a notch 25 similar to that of FIG. 6(c) in addition to the structure having the drawn portion 13e of FIG. 6(b).

[0057] The cutout 25 shown in FIG. 7(a) has an edge 26 that extends diagonally in a straight line between starting points P1 and P2. No rounded corners are provided at starting points P1 and P2. FIG. 7(b) shows a structure in which a cutout 25 similar to that of FIG. 7(a) is used in the structure having the drawn portion 13e of FIG. 6(b). The cutout 25 shown in FIG. 7(c) is a curved portion obtained by providing rounded corners at starting points P1 and P2 in the cutout 25 shown in FIG. 7(a). FIG. 7(d) shows a structure in which a cutout 25 similar to that of FIG. 7(c) is used in the structure having the drawn portion 13e of FIG. 6(b).

[0058] The notch 25 shown in FIG. 8(a) has an edge 26 extending between starting points P1 and P2 so as to be recessed toward the inner periphery. The edge 26 extends obliquely from starting point P1 in a first direction D1, then bends and extends obliquely in a third direction D3 to starting point P2. The notch 25 has a shape that extends away from the corner CN toward the inner periphery. Furthermore, a rounded corner is provided at the bent portion of the edge 26. Therefore, the notch 25 has a curved portion 27 when viewed from the second direction D2. Furthermore, rounded corners are provided at starting points P1 and P2, forming a curved portion. When viewed from the second direction D2, the curved portion 27 curves away from the corner CN toward the inner periphery. FIG. 8(b) shows a structure having a notch 25 similar to that of FIG. 8(a) in addition to the structure having the narrowed portion 13e of FIG. 6(b).

[0059] The cutout 25 shown in FIG. 8(c) has an edge 26 bent at a right angle between starting point P1 and starting point P2 so as to recess toward the inner periphery. The edge 26 extends from starting point P1 in a first direction D1, then bends and extends in a third direction D3 to starting point P2. The cutout 25 has a shape that extends away from the corner portion CN toward the inner periphery. Furthermore, there is no rounded corner at the bent portion of the edge 26. There are also no rounded corners at starting points P1 and P2. FIG. 8(d) shows a structure having a drawn portion 13e in FIG. 6(b), but employing a cutout 25 similar to that in FIG. 8(c).

[0060] The size of the cutout 25 will be described with reference to FIG. 9. FIG. 9(a) is a schematic diagram showing the structure when the cutout 25 is at its minimum size. FIG. 9(b) is a schematic diagram showing the structure when the cutout 25 is at its maximum size. Note that the shape of the cutout 25 corresponding to FIG. 7(a) is used here, but similar size relationships apply to other shapes. In the region E1 where the first internal electrode 11 and the second internal electrode 13 overlap in the second direction D2, the dimension in the third direction D3 is defined as W. In the overlapping region E1, the dimension in the first direction D1 is defined as L. As shown in FIG. 9(a), the minimum size of the cutout 25 in the third direction D3 is W / 10, and the minimum size in the first direction D1 is L / 10. As shown in FIG. 9(b), the maximum size of the cutout 25 in the third direction D3 is W / 3, and the maximum size in the first direction D1 is L / 3.

[0061] As a result, the dimension in the third direction D3 of the area E2 at the corner portion CN that does not overlap with the intermediate layer 20 is not less than W / 10 and not more than W / 3. That is, the dimension in the third direction D3 of the cutout 25 is not less than W / 10 and not more than W / 3. Furthermore, the dimension in the first direction D1 of the area E2 at the corner portion CN that does not overlap with the intermediate layer 20 is not less than L / 10 and not more than L / 3. That is, the dimension in the first direction D1 of the cutout 25 is not less than L / 10 and not more than L / 3.

[0062] Next, the functions and effects of the multilayer capacitor C1 (electronic component) in accordance with this embodiment will be described.

[0063] In the multilayer capacitor C1, the first internal electrode 11 and the second internal electrode 13 face each other in the second direction D2 via a dissimilar material layer 21 made of a material different from that of the element body 2. By stacking the dissimilar material layer 21 on the internal electrodes 11 and 13 in this way, the volume of the component having a higher linear expansion coefficient than the element body 2 is increased, thereby introducing compressive stress F1 (see FIG. 3) into the side gap SG between the internal electrodes 11 and 13 and the side surfaces 2e and 2f of the element body 2. This reduces the tensile stress F2 (see FIG. 3) in the center of the side gap SG in the second direction D2 in the side gap SG, thereby suppressing the occurrence of electrostrictive cracks, even if electrostrictive vibration occurs during voltage application. Furthermore, unlike the thin-layered multilayer structure of the dielectric layer 51 (see FIGS. 2 and 3), electrostrictive cracks can be suppressed while suppressing deterioration under high-temperature loads. Here, the dissimilar material layer does not overlap the corner portions CN of the internal electrodes 11 and 13 when viewed from the second direction D2. This allows stress relaxation at the corner portions CN of the outermost internal electrodes 11, 13. Furthermore, as the electric field strength increases, the amount of electrostriction increases, making it difficult to achieve the effect of increasing compressive stress. However, in this embodiment, the use of the different material layer 21 can suppress the increase in electric field strength and address this issue. As a result, electrostrictive cracks can be suppressed and stress can be relaxed at the corner portions CN of the internal electrodes 11, 13.

[0064] The element body 2 may be made of a ceramic material, and the different material layer 21 may be a metal layer. In this case, the linear expansion coefficient of the different material layer 21 can be made higher than that of the element body 2.

[0065] In the region E1 where the first internal electrode 11 and the second internal electrode 13 overlap in the second direction D2, if the dimension in a third direction D3 orthogonal to the first direction D1 and the second direction D2 is W, the dimension in the third direction of the region in the corner portion CN that does not overlap with the different material layer 21 may be W / 10 or more and W / 3 or less. In this case, the width of the region in the corner portion CN that does not overlap with the different material layer 21 can be sufficiently ensured, and by preventing the region from becoming too wide, compressive stress can be sufficiently introduced into the side gap portion.

[0066] In the region E1 where the first internal electrode 11 and the second internal electrode 13 overlap in the second direction D2, if the dimension in the first direction D1 is L, the dimension in the first direction D1 of the region E2 in the corner portion CN that does not overlap with the different material layer 21 may be equal to or greater than L / 10 and equal to or less than L / 3. In this case, the area of ​​the region E2 in the corner portion CN that does not overlap with the different material layer 21 can be sufficiently ensured, and by preventing the region E2 from becoming too wide, compressive stress can be sufficiently introduced into the side gap portion SG.

[0067] The different material layer 21 has a notch 25 at a position corresponding to the corner CN, and the notch 25 may have a shape that moves away from the corner CN toward the inner periphery as viewed from the second direction D2. Since the distance between the corner CN of the internal electrodes 11, 13 and the edge 26 of the notch 25 of the different material layer 21 can be increased, stress at the corner CN of the internal electrodes 11, 13 can be alleviated.

[0068] The different material layer 21 has a notch 25 at a position corresponding to the corner portion CN, and the notch 25 may have a curved portion 27 that forms a curve when viewed from the second direction D2. In this case, electric field concentration at the notch 25 can be suppressed.

[0069] When viewed from the second direction D2, the curved portion 27 may be curved so as to move away from the corner portion CN toward the inner periphery. In this case, the distance between the corner portion CN of the internal electrodes 11, 13 and the edge portion 26 of the notch portion 25 of the different material layer 21 can be increased, thereby alleviating stress at the corner portion CN of the internal electrodes 11, 13.

[0070] The corner portions CN may have a shape that protrudes outward, which can prevent electric field concentration at the corner portions CN.

[0071] The thickness of the dissimilar material layer 21 may be such that "dissimilar material layer thickness≧internal electrode thickness" relative to the thicknesses of the first internal electrode 11 and the second internal electrode 13 (for example, see FIGS. 14 and 15 described later), and preferably "dissimilar material thickness>internal electrode thickness." In this case, by increasing the thickness of the dissimilar material layer 21, the breakdown voltage can be improved.

[0072] The thickness of the different material layer 21 may be 1.3 times or more the thickness of the first internal electrode 11 and the second internal electrode 13. In this case, by sufficiently increasing the thickness of the different material layer 21, the breakdown voltage can be improved.

[0073] In the multilayer capacitor C1, the first internal electrode 11 and the second internal electrode 13 face each other in the second direction D2 via a compressive stress-introducing layer 22 that introduces compressive stress into the element body 2. The compressive stress-introducing layer 22 can introduce compressive stress F1 (see FIG. 3) in the third direction D3 to the side gaps SG between the first internal electrode 11 and the second internal electrode 13 and the side surfaces 2e and 2f of the element body 2. This reduces the tensile stress F2 (see FIG. 3) in the center of the side gaps SG in the second direction D2 in the side gaps SG, thereby suppressing the occurrence of electrostrictive cracks, even if electrostrictive vibration occurs during voltage application. Furthermore, unlike the thin-layer multilayer structure of the dielectric layers 51 (see FIGS. 2 and 3), electrostrictive cracks can be suppressed while suppressing deterioration under high-temperature loads. Here, the compressive stress-introducing layer 22 does not overlap the corners CN of the internal electrodes 11 and 13 when viewed from the second direction D2. This enables stress relaxation at the corners CN of the outermost internal electrodes 11 and 13. As a result, electrostrictive cracks can be suppressed and stress at the corner portions CN of the internal electrodes 11 and 13 can be alleviated.

[0074] The present invention is not limited to the above-described embodiments.

[0075] Modified examples of the shape of the intermediate layer 20 will be described with reference to Figures 10 and 11. Figures 10 and 11 are schematic diagrams of modified examples of the intermediate layer 20 as viewed from the second direction D2. As shown in Figure 10(a), the intermediate layer 20 may be divided in the first direction D1 by a slit 28. The slit 28 includes the center position of the internal electrodes 11, 13 in the first direction D1 and extends in the third direction. The intermediate layer 20 is divided into intermediate layer 20A and intermediate layer 20B with the slit 28 sandwiched between them.

[0076] The intermediate layers 20A and 20B have a smaller width in the first direction D1 than the internal electrodes 11 and 13. The intermediate layer 20A is arranged on one end side in the first direction D1 of the internal electrodes 11 and 13 when viewed from the second direction D2. The intermediate layer 20B is arranged on the other end side in the first direction D1 of the internal electrodes 11 and 13 when viewed from the second direction D2.

[0077] 10(b), the intermediate layer 20 may be divided in the third direction D3 by a slit 29. The slit 29 extends in the first direction D1 and includes the center position of the internal electrodes 11, 13 in the third direction D3. The intermediate layer 20 is divided into an intermediate layer 20C and an intermediate layer 20D with the slit 29 in between.

[0078] The intermediate layers 20C, 20D have a smaller width in the third direction D3 than the internal electrodes 11, 13. The intermediate layer 20C is arranged on one end side of the internal electrodes 11, 13 in the third direction D3 when viewed from the second direction D2. The intermediate layer 20D is arranged on the other end side of the internal electrodes 11, 13 in the third direction D3 when viewed from the second direction D2.

[0079] As shown in FIG. 11(a), the intermediate layer 20 may have an annular shape due to the through-holes 30. The intermediate layer 20 is arranged so as to overlap along the four ends of the internal electrodes 11, 13. The intermediate layer 20 has a smaller width in the first direction D1 than the internal electrodes 11, 13, and has portions that are arranged on both end sides of the internal electrodes 11, 13 in the first direction D1 when viewed from the second direction D2. The intermediate layer 20 has a smaller width in the third direction D3 than the internal electrodes 11, 13, and has portions that are arranged on both end sides of the internal electrodes 11, 13 in the third direction D3 when viewed from the second direction D2.

[0080] As shown in FIGS. 11(b) and 11(c), a structure in which a pair of L-shaped intermediate layers 20E, 20F are combined to form an annular intermediate layer 20 may be employed. The intermediate layer 20E shown in FIG. 11(b) has a width smaller than that of the internal electrodes 11, 13 in the first direction D1 and has a portion located on one end side of the internal electrodes 11, 13 in the first direction D1 as viewed from the second direction D2. The intermediate layer 20E has a width smaller than that of the internal electrodes 11, 13 in the third direction D3 and has a portion located on one end side of the internal electrodes 11, 13 in the third direction D3 as viewed from the second direction D2. The corners of the L-shape have notches 25. The longitudinal ends 20Ea, 20Eb of the L-shape of the intermediate layer 20E are positioned so as not to overlap the corners CN of the internal electrodes 11, 13.

[0081] 11(c) is smaller in width than the internal electrodes 11, 13 in the first direction D1, and has portions located on the other end side of the internal electrodes 11, 13 in the first direction D1 when viewed from the second direction D2. The intermediate layer 20F is smaller in width than the internal electrodes 11, 13 in the third direction D3, and has portions located on the other end side of the internal electrodes 11, 13 in the third direction D3 when viewed from the second direction D2. The L-shaped corners have notches 25. The longitudinal ends 20Fa, 20Fb of the L-shaped intermediate layer 20F are positioned so as not to overlap the corners CN of the internal electrodes 11, 13.

[0082] The combination of the end portions 20Ea and 20Fb described above allows the intermediate layer 20 to have a shape that does not overlap the corner portions CN when viewed from the second direction D2. The combination of the end portions 20Eb and 20Fa described above allows the intermediate layer 20 to have a shape that does not overlap the corner portions CN when viewed from the second direction D2. As described above, the means for preventing the intermediate layer 20 from overlapping the corner portions CN when viewed from the second direction D2 is not limited to the notch 25, and a means for adjusting the position of the narrow end portion of the intermediate layer 20 may also be used. Note that instead of the L-shaped shape extending along two sides of the internal electrodes 11 and 13, as in the intermediate layers 20e and 20f, a shape that extends along one side may be used. In this case, four sets of intermediate layers may be prepared.

[0083] If a direction orthogonal to the first and second directions is defined as a third direction, the different material layer may have a smaller width in at least one of the first and second directions than the first and second internal electrodes, and may be arranged on the end side of the first and second internal electrodes in one direction as viewed from the second direction. In this case, the internal electrodes do not overlap with the different material layer near the center, thereby suppressing bulging of the element body.

[0084] As shown in Figures 12 and 13, the outer peripheral edge 31 of the intermediate layer 20 may be thicker than the inner peripheral region 32. In this case, by thinning the inner peripheral region 32, bulging of the element body 2 can be suppressed. The shape and size of the thinner inner peripheral region 32 may be similar to those of the through-hole 30 in Figure 11(a). The thickness of the edge 31 may be 1.1 times or more, more preferably 1.3 times or more, the thickness of the inner peripheral region 32. In this case, by making the inner peripheral region sufficiently thin, bulging of the element body can be suppressed. The upper limit of the thickness of the edge 31 is not particularly limited, but may be 5.0 times or less the thickness of the inner peripheral region 32.

[0085] The relationship in thickness between the intermediate layer 20 (different material layer 21) and the internal electrodes 11, 13 is not particularly limited. For example, as shown in Figures 2 and 3, the intermediate layer 20 may be thicker than the internal electrodes 11, 13, or as shown in Figure 14, the intermediate layer 20 and the internal electrodes 11, 13 may be equal in thickness. Furthermore, for example, as shown in Figures 12 and 13, the thin region 32 of the intermediate layer 20 may be thicker than the internal electrodes 11, 13, or as shown in Figure 15, the thin region 32 of the intermediate layer 20 and the internal electrodes 11, 13 may be equal in thickness.

[0086] 16 to 19, an experiment to confirm the effect of the electronic component of this embodiment will be described. As an example, a multilayer capacitor having the layer structure shown in FIGS. 2 to 5 was prepared. As comparative example 1, a capacitor was prepared in which the intermediate layer 20 was omitted from the example. As comparative example 2, a capacitor was prepared in which the notch 25 was omitted from the example, and the intermediate layer 20 overlapped the corner portion CN of the internal electrodes 11, 13.

[0087] First, the suppression effect of electrostrictive cracking was confirmed. A voltage was applied to the Example and Comparative Examples 1 and 2, and the stress in the stacking direction in the side gap portion SG was measured. The stress was measured at measurement point MP1 shown in Figures 2, 3, and 4. The measurement results are shown in Figure 16. As shown in Figure 16, Comparative Example 2 and the Example, which have the intermediate layer 20, are able to introduce a larger compressive stress than Comparative Example 1 even before the voltage is applied. In Comparative Example 1, the stress acting on the side gap portion SG becomes a tensile stress at around 150 V. In contrast, in Comparative Example 2 and the Example, the stress acting on the side gap portion SG can become a compressive stress up to around 300 V. This confirms that the use of the intermediate layer 20 can introduce compressive stress into the side gap portion SG.

[0088] Next, the electrostrictive crack generation voltage was measured. A voltage was applied to the Example and Comparative Examples 1 and 2, and the voltage at which electrostrictive cracks occurred was measured. The measurement results are shown in the table of FIG. 17. As shown in the table of FIG. 17, the Example and Comparative Example 2, which have an intermediate layer 20, had a higher electrostrictive crack generation voltage than the Example and Comparative Example 1, which do not have an intermediate layer 20. A t-test was performed and it was confirmed that the difference between the Example and Comparative Example 2 and Comparative Example 1 was statistically significant. This confirmed that the use of the intermediate layer 20 can suppress electrostrictive cracks.

[0089] Next, the effect of providing the cutouts 25 in suppressing stress at the corner portions CN was confirmed. The stress at the corner portions CN was measured for the example and comparative examples 1 and 2. The stress was measured at measurement point MP2 shown in Figures 2, 3, and 4. The measurement results are shown in Figure 18. As shown in Figure 18, the maximum principal stress at the corner portions CN was large in comparative example 2, which did not have the cutouts 25. In contrast, the example, which provided the cutouts 25, was able to suppress the maximum principal stress at the corner portions CN to the same extent as comparative example 1, which did not have the intermediate layer 20. This confirmed that the stress at the corner portions CN could be suppressed by providing the cutouts 25 and preventing the intermediate layer 20 from overlapping with the corner portions CN.

[0090] Next, a thermal shock of 280°C was applied to the example and comparative examples 1 and 2, and the number of cracks that occurred was counted. Here, 20 samples were prepared, and the number of NG products was counted. The measurement results are shown in Figure 19. Comparative example 2 had a high NG rate. In contrast, the example was able to reduce the NG rate. This confirmed that by providing the notch 25 so that the intermediate layer 20 does not overlap with the corner portion CN, it is possible to suppress the occurrence of cracks at the corner portion CN.

[0091] [Form 1] an element body having a pair of end faces facing each other in a first direction; a first terminal electrode disposed on the end surface on one side in the first direction; a second terminal electrode disposed on the end surface on the other side in the first direction; a first internal electrode disposed within the element body and connected to the first terminal electrode; a second internal electrode disposed within the element body and connected to the second terminal electrode; a different material layer disposed within the element body and made of a different material from the element body, the first internal electrode and the second internal electrode face each other in a second direction perpendicular to the first direction, with the different material layer interposed therebetween; the different material layer has a linear expansion coefficient greater than a linear expansion coefficient of the element body, the first internal electrode and the second internal electrode include corner portions located within the element body, When viewed from the second direction, the different material layer does not overlap the corner portion. [Form 2] the element body is made of a ceramic material, 2. The electronic component according to claim 1, wherein the heterogeneous material layer is a metal layer. [Form 3] In a region where the first internal electrode and the second internal electrode overlap in the second direction, when a dimension in a third direction perpendicular to the first direction and the second direction is W, 3. The electronic component according to claim 1, wherein the dimension in the third direction of the area of ​​the corner portion that does not overlap with the different material layer is not less than W / 10 and not more than W / 3. [Form 4] In a region where the first internal electrode and the second internal electrode overlap in the second direction, when the dimension in the first direction is L, 4. The electronic component according to any one of modes 1 to 3, wherein the dimension in the first direction of the area of ​​the corner portion that does not overlap with the different material layer is not less than L / 10 and not more than L / 3. [Form 5] the different material layer has a notch at a position corresponding to the corner portion, 5. The electronic component according to any one of aspects 1 to 4, wherein the notch has a shape that increases in size from the corner portion toward an inner periphery when viewed from the second direction. [Form 6] the different material layer has a notch at a position corresponding to the corner portion, 6. The electronic component according to any one of embodiments 1 to 5, wherein the cutout portion has a curved portion that forms a curve when viewed from the second direction. [Form 7] 7. The electronic component according to claim 6, wherein the curved portion is curved so as to move away from the corner portion toward an inner periphery when viewed from the second direction. [Form 8] 8. The electronic component according to any one of aspects 1 to 7, wherein the corner portion has a shape that protrudes outward. [Form 9] 9. The electronic component according to any one of modes 1 to 8, wherein the different material layer has a thickness greater than the thicknesses of the first internal electrode and the second internal electrode. [Form 10] 10. The electronic component according to claim 9, wherein the thickness of the different material layer is 1.3 times or more the thickness of the first internal electrode and the second internal electrode. [Form 11] 11. The electronic component according to any one of modes 1 to 10, wherein the outer peripheral edge of the different material is thicker than the inner peripheral region. [Form 12] 12. The electronic component according to claim 11, wherein the thickness of the edge portion is at least 1.3 times the thickness of the inner peripheral region. [Form 13] If a direction perpendicular to the first direction and the second direction is defined as a third direction, The heterogeneous material layer is a width in at least one of the first direction and the third direction that is smaller than that of the first internal electrode and the second internal electrode, 13. The electronic component according to any one of embodiments 1 to 12, wherein the first internal electrode and the second internal electrode are disposed on end sides in the one direction when viewed from the second direction. [Form 14] an element body having a pair of end faces facing each other in a first direction; a first terminal electrode disposed on the end surface on one side in the first direction; a second terminal electrode disposed on the end surface on the other side in the first direction; a first internal electrode disposed within the element body and connected to the first terminal electrode; a second internal electrode disposed within the element body and connected to the second terminal electrode; a compressive stress introduction layer that is disposed within the element body and introduces a compressive stress into the element body, the first internal electrode and the second internal electrode face each other in a second direction perpendicular to the first direction, with the compressive stress introduction layer interposed therebetween; the compressive stress introduction layer introduces the compressive stress to a side gap portion between the first internal electrode and the second internal electrode and a side surface of the element body in a third direction orthogonal to the first direction and the second direction, the first internal electrode and the second internal electrode include corner portions located within the element body, When viewed in the second direction, the compressive stress application layer does not overlap with the corner portion. [Explanation of symbols]

[0092] 2...element body, 5...first terminal electrode, 7...second terminal electrode, 11...first internal electrode, 13...second internal electrode, 21...different material layer, 22...compressive stress introduction layer, 25...notch portion, 26...edge portion, 27...curved portion, C1...multilayer capacitor (electronic component).

Claims

1. an element body having a pair of end faces facing each other in a first direction; a first terminal electrode disposed on the end surface on one side in the first direction; a second terminal electrode disposed on the end surface on the other side in the first direction; a first internal electrode disposed within the element body and connected to the first terminal electrode; a second internal electrode disposed within the element body and connected to the second terminal electrode; a different material layer disposed within the element body and made of a different material from the element body, the first internal electrode and the second internal electrode face each other in a second direction perpendicular to the first direction, with the different material layer interposed therebetween; the different material layer has a linear expansion coefficient greater than a linear expansion coefficient of the element body, the first internal electrode and the second internal electrode include corner portions located within the element body, When viewed from the second direction, the different material layer does not overlap the corner portion.

2. the element body is made of a ceramic material, The electronic component according to claim 1 , wherein the layer of different material is a metal layer.

3. In a region where the first internal electrode and the second internal electrode overlap in the second direction, when a dimension in a third direction perpendicular to the first direction and the second direction is defined as W, 2. The electronic component according to claim 1, wherein the dimension in the third direction of the area of ​​the corner portion that does not overlap with the different material layer is equal to or greater than W / 10 and equal to or less than W / 3.

4. In a region where the first internal electrode and the second internal electrode overlap in the second direction, when the dimension in the first direction is L, 2. The electronic component according to claim 1, wherein the dimension in the first direction of the area of ​​the corner portion that does not overlap with the different material layer is equal to or greater than L / 10 and equal to or less than L / 3.

5. the different material layer has a notch at a position corresponding to the corner portion, The electronic component according to claim 1 , wherein the notch has a shape that extends away from the corner portion toward an inner periphery when viewed from the second direction.

6. the different material layer has a notch at a position corresponding to the corner portion, The electronic component according to claim 1 , wherein the cutout portion has a curved portion that forms a curve when viewed from the second direction.

7. The electronic component according to claim 6 , wherein the curved portion is curved so as to move away from the corner portion toward an inner periphery when viewed from the second direction.

8. The electronic component according to claim 1 , wherein the corner portion has a shape that protrudes outward.

9. The electronic component according to claim 1 , wherein the thickness of the different material layer is greater than the thickness of the first internal electrode and the second internal electrode.

10. 10. The electronic component according to claim 9, wherein the thickness of the different material layer is 1.3 times or more the thickness of the first internal electrode and the second internal electrode.

11. The electronic component according to claim 1 , wherein an outer peripheral edge of the different material is thicker than an inner peripheral region.

12. The electronic component according to claim 11 , wherein the thickness of the edge portion is at least 1.3 times the thickness of the inner peripheral region.

13. When a direction perpendicular to the first direction and the second direction is defined as a third direction, The heterogeneous material layer is a width in at least one of the first direction and the third direction that is smaller than that of the first internal electrode and the second internal electrode, The electronic component according to claim 1 , wherein the first internal electrode and the second internal electrode are disposed on end sides in the one direction when viewed from the second direction.

14. an element body having a pair of end faces facing each other in a first direction; a first terminal electrode disposed on the end surface on one side in the first direction; a second terminal electrode disposed on the end surface on the other side in the first direction; a first internal electrode disposed within the element body and connected to the first terminal electrode; a second internal electrode disposed within the element body and connected to the second terminal electrode; a compressive stress introduction layer that is disposed within the element body and introduces a compressive stress into the element body, the first internal electrode and the second internal electrode face each other in a second direction perpendicular to the first direction, with the compressive stress introduction layer interposed therebetween; the compressive stress introduction layer introduces the compressive stress to a side gap portion between the first internal electrode and the second internal electrode and a side surface of the element body in a third direction orthogonal to the first direction and the second direction, the first internal electrode and the second internal electrode include corner portions located within the element body, When viewed in the second direction, the compressive stress application layer does not overlap with the corner portion.

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