Multilayer ceramic capacitor

Abstract

The utility model relates to the technical field of ceramic capacitors, and discloses a multilayer ceramic capacitor, which has a first direction, a second direction and a third direction which are vertically intersected in pairs, and comprises a laminated body, two protection sheets, a first outer electrode, a second outer electrode, a plurality of first inner electrodes and a plurality of second inner electrodes, the first inner electrode comprises a first main body part and a first side part, and one side, far away from the first main body part, of the first side part in the second direction is connected with the protection sheet; the second inner electrode comprises a second main body part and a second side part, and one side, far away from the second main body part, of the second side part in the second direction is connected with the protection sheet; and in the second direction, the lengths of the first side edge part and the second side edge part on the same side of the first main body part in the first direction are L1 and L2, the length of the laminated body in the first direction is L3, and L1 + L2-L3 is greater than or equal to 0mm and less than or equal to 1mm. The beneficial effects of the utility model are that the thickness difference between the corner part of the capacitor and other positions is reduced, cracks are prevented, the trailing is convenient to remove, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of ceramic capacitor technology, and in particular to a multilayer ceramic capacitor. Background Technology

[0002] In the internal electrode formation process of multilayer ceramic capacitors, a printing method is generally used to form an internal electrode film pattern consisting of multiple arrayed internal electrode film units on a ceramic film. In order to prevent the internal electrode from being exposed from the two sides of the laminate width direction after the cutting process, protective sheets are provided on the two sides of the laminate width direction. In this process, protective sheets are prepared in advance, and protective sheets of equal width are joined on the two sides of the laminate width direction obtained after the cutting process, thereby sealing the internal electrode and preventing the internal electrode from being exposed on the sides of the laminate.

[0003] When using the above method, the inner electrode with opposite polarity is cut off simultaneously during the cutting process. When the inner electrode is pulled out due to the scraping and pulling of the cutter, it will form as follows: Figure 1 As shown in the diagram, when the spacing between adjacent inner electrodes is small, tail A can easily connect to two adjacent inner electrodes with opposite polarities, causing the capacitor to short-circuit.

[0004] CN103247441A discloses a method for manufacturing a multilayer ceramic capacitor. Because the two corners of the capacitor lack internal electrodes, the thickness of these corners is significantly less than the thickness of other parts of the capacitor, making them prone to cracking. Furthermore, in CN106920693A, removing the tailing of the internal electrodes requires removing the entire surface layer of the cut surface, which is time-consuming and has low productivity. Utility Model Content

[0005] The purpose of this invention is to provide a multilayer ceramic capacitor that reduces the thickness difference between the corners and other parts of the capacitor, prevents cracks, facilitates the removal of tailings, and improves production efficiency.

[0006] To achieve the above objectives, this utility model provides a multilayer ceramic capacitor having a first direction, a second direction, and a third direction that intersect each other perpendicularly, including: a laminate, two protective sheets, a first external electrode, a second external electrode, a plurality of first internal electrodes, and a plurality of second internal electrodes;

[0007] The two protective sheets are respectively disposed at both ends of the laminate in the second direction;

[0008] The first external electrode and the second external electrode are disposed at both ends of the laminate in the first direction;

[0009] Multiple first inner electrodes are spaced apart in the third direction within the laminate. Each first inner electrode includes a first main body portion and a first side portion extending in the first direction. The first main body portion has the first side portion symmetrically provided at both ends in the second direction. One end of the first main body portion and the first side portion in the first direction is connected to the first outer electrode. The side portion of the first side portion in the second direction away from the first main body portion is connected to the protective sheet.

[0010] Multiple second inner electrodes are spaced apart in the third direction within the laminate, and a first inner electrode is provided between adjacent second inner electrodes. Each second inner electrode includes a second main body portion and a second side portion extending in the first direction. The second main body portion has second side portions symmetrically provided at both ends in the second direction. One end of the second main body portion and the second side portion in the first direction is connected to the second outer electrode, and the side of the second side portion away from the second main body portion in the second direction is connected to the protective sheet.

[0011] In the second direction, the lengths of the first side portion and the second side portion located on the same side of the first main body portion in the first direction are L1 and L2, respectively, and the length of the laminate in the first direction is L3, where 0mm≤L1+L2-L3≤1mm.

[0012] Furthermore, 0mm≤L1+L2-L3≤0.1mm.

[0013] Furthermore, the thickness of the first inner electrode and the second inner electrode in the third direction is H, where 0.5um ≤ H ≤ 1um.

[0014] Furthermore, the thickness of the protective sheet in the second direction is h, where 50um ≤ h ≤ 200um.

[0015] Furthermore, the first external electrode has the same structure as the second external electrode. The first external electrode is attached to one side of the laminate and extends partially along the first direction to form a covering cavity. The sidewall of the covering cavity is attached to one side of the two protective sheets facing away from the laminate and to both end faces of the laminate in the third direction.

[0016] Furthermore, the first external electrode includes a first base layer, a second base layer, and a third base layer disposed sequentially away from the laminate.

[0017] Furthermore, the protective sheet has a rectangular cross-sectional shape in the first direction.

[0018] Furthermore, the protective sheet is made of ceramic material.

[0019] Furthermore, the cross-sectional shape of the first main body and the first side portion in the first direction is rectangular.

[0020] Furthermore, the cross-sectional shape of the second main body and the second side portion in the first direction is rectangular.

[0021] Compared with the prior art, the multilayer ceramic capacitor of this utility model has the following advantages: The first inner electrode includes a first main body and a first side portion extending along a first direction. The first main body has symmetrically arranged first side portions at both ends in a second direction. One end of the first main body and the first side portion in the first direction is connected to the first outer electrode, and the side portion in the second direction away from the first main body is connected to a protective sheet. The second inner electrode includes a second main body and a second side portion extending along the first direction. The second main body has symmetrically arranged second side portions at both ends in the second direction. One end of the second main body and the second side portion in the first direction is connected to the second outer electrode, and the side portion in the second direction away from the second main body is connected to a protective sheet. This ensures that the corner positions of the laminate all have inner electrode structures, reducing the thickness difference between the corners and other positions of the laminate, and preventing crack formation. Furthermore, in the second direction, the lengths of the first side portion and the second side portion located on the same side of the first main body portion in the first direction are L1 and L2, respectively, and the length of the laminate in the first direction is L3, with 0mm≤L1+L2-L3≤1mm. This restricts the distribution of the trailing material generated during the cutting process to a narrow strip-shaped area, enabling efficient removal of the trailing material and improving production efficiency. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the internal electrode tailing structure generated during the cutting process of a multilayer ceramic capacitor in the prior art;

[0023] Figure 2 This is a schematic diagram of the structure of a multilayer ceramic capacitor according to an embodiment of the present invention;

[0024] Figure 3 This is an assembly diagram of a multilayer ceramic capacitor according to an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the structure of the multilayer ceramic capacitor stack according to an embodiment of the present invention;

[0026] Figure 5 This is a cross-sectional view of a multilayer ceramic capacitor according to an embodiment of the present invention;

[0027] Figure 6 This is a cross-sectional view of the first internal electrode of the multilayer ceramic capacitor according to an embodiment of the present invention;

[0028] Figure 7 This is a cross-sectional view of the second internal electrode of the multilayer ceramic capacitor according to an embodiment of the present invention;

[0029] Figure 8 This is a printed pattern of the internal electrode film of the multilayer ceramic capacitor according to an embodiment of the present invention;

[0030] Figure 9 This is a schematic diagram of the structure of cutting the laminated mother plate into laminated blocks according to an embodiment of the present invention;

[0031] Figure 10 This is a schematic diagram of the grinding of the stacked blocks according to an embodiment of the present invention;

[0032] Figure 11 This is a schematic diagram of the connection between the protective sheet and the laminated block in an embodiment of this utility model;

[0033] Figure 12 This is a schematic diagram showing the completed joining of the protective sheet and the laminated block according to an embodiment of this utility model;

[0034] Figure 13 This is a schematic diagram of the cutting of the ceramic sheet according to an embodiment of the present invention.

[0035] In the figure, 1 is the laminated body; 11 is the laminated block; 2 is the protective sheet; 3 is the first external electrode; 31 is the encapsulation cavity; 4 is the second external electrode; 5 is the first internal electrode; 51 is the first main body; 52 is the first side part; 6 is the second internal electrode; 61 is the second main body; 62 is the second side part; X is the first direction; Y is the second direction; Z is the third direction; 7 is the rotating shaft; 8 is the grinding wheel; A is the trailing tail. Detailed Implementation

[0036] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0037] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "inner", "outer" and other terms used in this utility model to indicate the orientation or positional relationship are based on the positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device and element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0038] In the description of this utility model, it should be understood that the terms "first," "second," etc., are used to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this utility model, "first" information can also be referred to as "second" information, and similarly, "second" information can also be referred to as "first" information.

[0039] like Figures 1 to 13 As shown, a preferred embodiment of this utility model discloses a multilayer ceramic capacitor having three perpendicularly intersecting directions: a first direction X, a second direction Y, and a third direction Z. It includes: a laminate 1, two protective sheets 2, a first external electrode 3, a second external electrode 4, multiple first internal electrodes 5, and multiple second internal electrodes 6. The laminate 1 is formed by stacking multiple ceramic films along the third direction Z, and has an overall cuboid shape. For ease of explanation, the length direction of the laminate 1 is defined as the first direction X, the width direction as the second direction Y, and the height direction as the third direction Z. The two protective sheets 2 are respectively disposed at both ends of the laminate 1 in the second direction Y, isolating the two end faces of the laminate 1 in the second direction Y from the external environment, preventing moisture and mechanical damage. The first external electrode 3 and the second external electrode 4 are disposed at both ends of the laminate 1 in the first direction X, and there is a gap between the first external electrode 3 and the second external electrode 4 to maintain insulation.

[0040] See Figures 2 to 7 Multiple first inner electrodes 5 are spaced apart along the third direction Z within the laminate 1. In order to enable the first inner electrodes 5 to be positioned at the corners of the laminate 1, the first inner electrode 5 includes a first main body portion 51 and a first side portion 52 extending along the first direction X. Specifically, the first main body portion 51 is symmetrically provided with the first side portion 52 at both ends in the second direction Y. The first main body portion 51 and the first side portion 52 are connected to the first outer electrode 3 at one end in the first direction X, and the side of the first side portion 52 away from the first main body portion 51 in the second direction Y is connected to the protective sheet 2. This allows the first inner electrodes 5 to be positioned at the two corners where the first direction X and the second direction Y intersect.

[0041] Similarly, multiple second inner electrodes 6 are spaced apart along the third direction Z within the laminate 1, and a first inner electrode 5 is provided between adjacent second inner electrodes 6. The second inner electrodes 6 and the first inner electrode 5 are insulated from each other, and the first inner electrode 5 and the second inner electrode 6 are respectively provided at both ends of the laminate 1 in the first direction X. The second inner electrode 6 includes a second main body portion 61 and a second side portion 62 extending along the first direction X. Specifically, the second main body portion 61 is symmetrically provided with second side portions 62 at both ends in the second direction Y. One end of the second main body portion 61 and the second side portion 62 in the first direction X is connected to the second outer electrode 4, and the side of the second side portion 62 away from the second main body portion 61 in the second direction Y is connected to the protective sheet 2, so that the second inner electrode 6 can be provided at the other two corners where the first direction X and the second direction Y of the laminate 1 intersect. Thus, it can be seen that the four corners of the laminate 1 are provided with inner electrode structures, reducing the thickness difference between the corners and other positions of the laminate 1 and preventing cracks from forming.

[0042] In this embodiment, the first main body 51 and the two first side portions 52 are flush with one end face of the laminate 1 in the first direction X. The other end face of the first main body 51 in the first direction X is inside the laminate 1. The two first side portions 52 are flush with both end faces of the laminate 1 in the second direction Y. All other end faces are located inside the laminate 1. Similarly, the second main body 61 and the two second side portions 62 are flush with the other end face of the laminate 1 in the first direction X. The other end face of the second main body 61 in the first direction X is inside the laminate 1. The two second side portions 62 are flush with both end faces of the laminate 1 in the second direction Y. All other end faces are located inside the laminate 1. In this embodiment, the first main body 51 and the first side part 52 have a rectangular cross-sectional shape in the first direction X, and the second main body 61 and the second side part 62 have a rectangular cross-sectional shape in the first direction X. Specifically, the first main body 51 and the second main body 61 have an overlapping portion when projected in the third direction Z. The larger the area of ​​the overlapping portion, the larger the capacitance of the multilayer ceramic capacitor.

[0043] Furthermore, to facilitate the removal of the trailing tail, the dimensions of the first side portion 52 and the second side portion 62 are limited in this invention. Specifically, in the second direction Y, the lengths of the first side portion 52 and the second side portion 62 located on the same side of the first main body portion 51 in the first direction X are L1 and L2, respectively, and the length of the laminate 1 in the first direction X is L3, where 0mm ≤ L1 + L2 - L3 ≤ 1mm. Since the overlapping portion of the first side portion 52 and the second side portion 62 located on the same side of the first main body portion 51, projected in the third direction Z, extends very little along the first direction X. This allows the distribution of the trailing tail generated during the cutting process to be confined to a narrow strip-shaped area, eliminating the need to remove the entire surface layer of the cut surface to remove the trailing tail, thus improving the trailing tail removal efficiency and consequently increasing production efficiency. In some embodiments, preferably, 0mm ≤ L1 + L2 - L3 ≤ 0.1mm. In an embodiment, L1 = L2 = 0.5L.

[0044] Furthermore, in some embodiments, the thickness of the first inner electrode 5 and the second inner electrode 6 in the third direction Z is H, where 0.5µm ≤ H ≤ 1µm. When the thickness is less than 0.5µm, the poor continuity between the first inner electrode 5 and the second inner electrode 6 is not conducive to improving the capacitance; when the thickness is greater than 1µm, it is not conducive to reducing the overall thickness of the multilayer ceramic capacitor. Specifically, both the first inner electrode 5 and the second inner electrode 6 are made of nickel.

[0045] Furthermore, in some embodiments, the protective sheet 2 is made of ceramic material and is a rectangular thin sheet. When installed, the protective sheet 2 is flush with the end face of the laminate 1 in the second direction Y, thereby covering the exposed first inner electrode 5 or second inner electrode 6 on the surface of the laminate 1, serving to prevent moisture and mechanical damage, and improving the reliability of the multilayer ceramic capacitor. The thickness of the protective sheet 2 in the second direction Y is h, where 50µm ≤ h ≤ 200µm. When the thickness is less than 50µm, the moisture-proof and mechanical damage-prevention effects of the protective sheet 2 are weakened; when the thickness is greater than 200µm, it is not conducive to improving the capacitance of the multilayer ceramic capacitor.

[0046] Furthermore, to facilitate protection of the laminate 1 and the protective sheet 2, and for ease of processing, the first external electrode 3 and the second external electrode 4 have the same structure. Specifically, the first external electrode 3 extends partially along the first direction X to form a covering cavity 31 on one side of the laminate 1. The sidewall of the covering cavity 31 is attached to the side of the two protective sheets 2 facing away from the laminate 1, and to both end faces of the laminate 1 in the third direction Z. Meanwhile, to facilitate the design of the structure of the first external electrode 3, the first external electrode 3 includes a first base layer, a second base layer, and a third base layer disposed sequentially away from the laminate 1. Specifically, the first base layer is a copper layer, the second base layer is a nickel layer, and the third base layer is a tin layer.

[0047] The method for preparing the multilayer ceramic capacitor according to this utility model includes the following steps:

[0048] Step S1: Mix ceramic powder, binder, and organic solvent to form a ceramic slurry, and then cast the ceramic slurry into a ceramic film. The ceramic powder can be made of materials such as barium titanate or calcium zirconate. The thickness of the ceramic film can be, for example, 1µm-20µm.

[0049] Step S2: Print nickel metal paste onto the ceramic thin film and dry it to form the internal electrode thin film. (See also...) Figure 8 , Figure 8 This is a schematic diagram of the printed pattern of the inner electrode thin film according to an embodiment of the present invention, wherein L represents a virtual cutting line.

[0050] Step S3: Stack multiple ceramic films with internal electrode films along the third direction Z, and cover the ceramic films obtained in step S1 on both sides of the stacked structure along the third direction Z to obtain the mother plate of the stacked body 1.

[0051] In this process, covering the ceramic films obtained in step S1 on both sides of the stacked structure along the third direction Z is to cover the first inner electrode 5 and the second inner electrode 6, protecting the inner electrodes from moisture intrusion and mechanical damage. When multiple ceramic films with inner electrode films are stacked along the third direction Z, adjacent ceramic films with inner electrode films are staggered by a suitable distance in the first direction X to form the first inner electrode 5 and the second inner electrode 6.

[0052] Step S4, see Figure 9 The mother plate of the laminate 1 is pressed along the third direction Z, and then the mother plate of the laminate 1 is sequentially cut into multiple elongated laminate blocks 11 along the second direction Y. The cut surface formed in step S4 is the first cut surface, which corresponds to the two end faces of the laminate 1 in the second direction Y. The first side portion 52 and the second side portion 62 are exposed on the first cut surface. During the cutting in step S4, an internal electrode tail may be generated on the first cut surface.

[0053] Step S5: Remove the surface layer near the ends of the first side portion 52 and the second side portion 62 of the first cut surface of the laminated block 11 that are close to each other. Since the inner electrode tail extends basically along the third direction Z, only the area where the inner electrode tail overlaps when the first side portion 52 and the second side portion 62 are projected onto the third direction Z will overlap the first side portion 52 and the second side portion 62, causing a short circuit, and needs to be removed. The inner electrode tail in other areas will not cause a short circuit and does not need to be removed. See reference. Figure 10Multiple stacked blocks 11 can be arranged neatly and fixed, exposing the first cut surface. The parts of each stacked block 11 that need to be ground are aligned, and multiple grinding wheels 8 arranged side by side on the rotating shaft 7 are driven to rotate. Each grinding wheel is aligned with the area of ​​the stacked block 11 where the surface layer needs to be removed and moves along the third direction Z to grind the surface of the stacked block 11. The grinding of one first cut surface can be completed in one move, and then the grinding of another first cut surface can be performed. This allows multiple stacked blocks 11 to be processed at the same time, improving productivity. In some other embodiments, laser irradiation, sandblasting, or other methods can be used to remove the surface layer of the cut surface.

[0054] Step S6, see Figure 11 and Figure 12 The protective sheet 2 is attached to the first cut surface of the laminate 11, and then the protective sheet 2 and the laminate 11 are joined along the second direction Y under heating and pressure. The protective sheet 2 can seal the inner electrode and prevent moisture intrusion, thereby improving the reliability of the multilayer ceramic capacitor.

[0055] Step S7, see Figure 13 The laminated block 11 covered with protective sheet 2 is sequentially cut into multiple green ceramic sheets along the first direction X. The green ceramic sheets are roughly cuboid in shape, with the central portion along the second direction Y being the laminated block 11 and the two side portions being the protective sheet 2. The cut surface formed in step S7 is the second cut surface, which corresponds to the two end faces of the laminated body 1 in the first direction X. The first inner electrode 5 and the second inner electrode 6 are exposed on the second cut surface.

[0056] Step S8: Remove the binder from the green ceramic sheet and sinter it to obtain a ceramic body composed of laminate 1 and protective sheet 2. Specifically: First, remove the binder by heating the green ceramic sheet to 250℃-350℃ in air and holding it at that temperature for 0.5-3 hours to remove the binder contained in the green ceramic sheet, or by heating the green ceramic sheet to 350℃-600℃ in nitrogen and holding it at that temperature for 2-6 hours to remove the binder contained in the green ceramic sheet. Then, sinter it in a reducing atmosphere formed by a mixture of humidified nitrogen and hydrogen (the volume of hydrogen is 0.1%-3% of the volume of nitrogen), heating the green ceramic sheet to 1100℃-1300℃ and holding it at that temperature for 0.5-3 hours to sinter the laminate 1 and protective sheet 2 into a uniform and dense whole, obtaining a ceramic body composed of laminate 1 and protective sheet 2.

[0057] Step S9: Copper metal paste is applied to both ends of the ceramic body in the first direction X, and the copper metal paste is sintered to form a copper layer of the external electrode.

[0058] Step S10: A nickel layer and a tin layer of the external electrode are sequentially formed on the copper layer of the external electrode by electroplating, thereby obtaining a multilayer ceramic capacitor.

[0059] In summary, this embodiment of the invention provides a multilayer ceramic capacitor. The first inner electrode 5 includes a first main body portion 51 and a first side portion 52 extending along a first direction X. The first main body portion 51 has symmetrically arranged first side portions 52 at both ends in a second direction Y. One end of the first main body portion 51 and the first side portion 52 in the first direction X is connected to the first outer electrode 3, and the first side portion 52 is connected to the protective sheet 2 in a one-to-one correspondence. The second inner electrode 6 includes a second main body portion 61 and a second side portion 62 extending along a first direction X. The second main body portion 61 has symmetrically arranged second side portions 62 at both ends in the second direction Y. One end of the second main body portion 61 and the second side portion 62 in the first direction X is connected to the second outer electrode 4, and the second side portions 62 are all connected to the protective sheet 2 in a one-to-one correspondence. This design ensures that the corner positions of the laminate 1 all have inner electrode structures, reducing the thickness difference between the corners and other positions of the laminate 1 and preventing crack formation. Furthermore, in the second direction Y, the lengths of the first side portion 52 and the second side portion 62 located on the same side of the first main body portion 51 in the first direction X are L1 and L2, respectively, and the length of the laminate 1 in the first direction X is L3, with 0mm≤L1+L2-L3≤1mm. This restricts the distribution of the trailing material generated in the cutting process to a narrow strip-shaped area, enabling efficient removal of the trailing material and improving production efficiency.

[0060] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of this utility model, and these improvements and substitutions should also be considered within the protection scope of this utility model.

Claims

1. A multilayer ceramic capacitor having a first direction, a second direction, and a third direction that intersect each other perpendicularly, characterized in that, include: The laminate consists of two protective sheets, a first external electrode, a second external electrode, multiple first internal electrodes, and multiple second internal electrodes. The two protective sheets are respectively disposed at both ends of the laminate in the second direction; The first external electrode and the second external electrode are disposed at both ends of the laminate in the first direction; Multiple first inner electrodes are spaced apart in the third direction within the laminate. Each first inner electrode includes a first main body portion and a first side portion extending in the first direction. The first main body portion has the first side portion symmetrically provided at both ends in the second direction. One end of the first main body portion and the first side portion in the first direction is connected to the first outer electrode. The side portion of the first side portion in the second direction away from the first main body portion is connected to the protective sheet. Multiple second inner electrodes are spaced apart in the third direction within the laminate, and a first inner electrode is provided between adjacent second inner electrodes. Each second inner electrode includes a second main body portion and a second side portion extending in the first direction. The second main body portion has second side portions symmetrically provided at both ends in the second direction. One end of the second main body portion and the second side portion in the first direction is connected to the second outer electrode, and the side of the second side portion away from the second main body portion in the second direction is connected to the protective sheet. In the second direction, the lengths of the first side portion and the second side portion located on the same side of the first main body portion in the first direction are L1 and L2, respectively, and the length of the laminate in the first direction is L3, where 0mm≤L1+L2-L3≤1mm.

2. The multilayer ceramic capacitor as described in claim 1, characterized in that: 0mm≤L1+L2-L3≤0.1mm.

3. The multilayer ceramic capacitor as described in claim 1, characterized in that: The thickness of the first inner electrode and the second inner electrode in the third direction is H, where 0.5um ≤ H ≤ 1um.

4. The multilayer ceramic capacitor as described in claim 1, characterized in that: The thickness of the protective sheet in the second direction is h, where 50um ≤ h ≤ 200um.

5. The multilayer ceramic capacitor as described in claim 1, characterized in that: The first external electrode has the same structure as the second external electrode. The first external electrode is attached to one side of the laminate and extends partially along the first direction to form a covering cavity. The sidewall of the covering cavity is attached to one side of the two protective sheets facing away from the laminate and to both end faces of the laminate in the third direction.

6. The multilayer ceramic capacitor as described in claim 1, characterized in that: The first external electrode includes a first base layer, a second base layer, and a third base layer disposed sequentially away from the laminate.

7. The multilayer ceramic capacitor as described in claim 1, characterized in that: The protective sheet has a rectangular cross-sectional shape in the first direction.

8. The multilayer ceramic capacitor as described in claim 1, characterized in that: The protective sheet is made of ceramic material.

9. The multilayer ceramic capacitor as described in claim 1, characterized in that: The cross-sectional shape of the first main body and the first side portion in the first direction is rectangular.

10. The multilayer ceramic capacitor as described in claim 1, characterized in that: The cross-sectional shape of the second main body and the second side portion in the first direction is rectangular.

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