CN210467600U

CN210467600U - Multilayer ceramic capacitor

Info

Publication number: CN210467600U
Application number: CN201921424817.6U
Authority: CN
Inventors: 陆亨; 刘伟峰; 田述仁; 安可荣; 卓金丽
Original assignee: Guangdong Fenghua Advanced Tech Holding Co Ltd
Current assignee: Guangdong Fenghua Advanced Tech Holding Co Ltd
Priority date: 2019-08-28
Filing date: 2019-08-28
Publication date: 2020-05-05
Anticipated expiration: 2029-08-28

Abstract

The utility model discloses a multilayer ceramic capacitor, multilayer ceramic capacitor utilizes the geometry principle, adopts special inner electrode pattern design, realizes changing along with the grinding depth with the distance between two parts of layer inner electrode or the length of recognition function's inner electrode to the grinding depth when judging the condenser and splitting according to these information. The utility model discloses a multilayer ceramic capacitor can provide positional information for the inspector at the grinding in-process, makes the inspector know the concrete position of current section in the sample and the grinding depth of current section, can improve the effect and the efficiency of microsection inspection analysis to the capacity scope of condenser is wide, can satisfy the requirement of miniaturization and high-volume quantization.

Description

Multilayer ceramic capacitor

Technical Field

The utility model relates to an electronic component field especially relates to a multilayer ceramic capacitor.

Background

In general, when a multilayer ceramic capacitor or a semi-finished product thereof such as a ceramic body obtained by sintering is subjected to a metallographic section examination analysis, a sample to be examined is arranged in a mold and filled with resin to prepare a resin block, then the sample fixed in the resin block is ground and polished, and finally the resin block is placed under a microscope to observe the sample. Sometimes, an inspector needs to know the specific position of the current section in the sample and the grinding depth of the current section, for example, when the sample is found to have an internal defect, the inspector needs to know the specific position and the approximate size of the defect in the sample so as to analyze the nature and the generation cause of the defect; or to more accurately control the polishing progress so as to avoid over-polishing missing the cross-sectional location of interest. However, the conventional multilayer ceramic capacitor cannot provide the above information to the inspector during the grinding process, resulting in poor inspection and analysis efficiency.

SUMMERY OF THE UTILITY MODEL

Accordingly, the present invention is directed to a multilayer ceramic capacitor that overcomes the above-mentioned disadvantages of the prior art. When the multilayer ceramic capacitor is ground, an inspector can know the specific position of the current section in a sample and the grinding depth of the current section through measurement, and the effect and the efficiency of microsection detection and analysis can be improved.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a multilayer ceramic capacitor comprises a ceramic body, a first external electrode, a second external electrode and an internal electrode, wherein the ceramic body is a cuboid formed by laminating a plurality of ceramic dielectric layers, and comprises an upper surface and a lower surface which are opposite to each other, a first end surface and a second end surface which are opposite to each other, and a first side surface and a second side surface which are opposite to each other;

the internal electrodes comprise at least one first internal electrode and at least one second internal electrode, and the first internal electrodes and the second internal electrodes are alternately laminated on the surfaces of different ceramic dielectric layers;

at least one of the first internal electrode and the second internal electrode is a right trapezoid; when the first inner electrode is in a right trapezoid shape, gaps are formed among the first inner electrode, the first end face, the second end face, the first side face and the second side face; when the second inner electrode is in a right trapezoid shape, gaps are formed among the second inner electrode, the first end face, the second end face, the first side face and the second side face;

alternatively, the first and second electrodes may be,

the first internal electrode comprises a first main body part, the second internal electrode comprises a second main body part, and at least one of the first internal electrode and the second internal electrode is provided with a recognition part;

when the first inner electrode is provided with the identification part, the second inner electrode is connected with the second outer electrode, and the second inner electrode is insulated from the first outer electrode; the first main body part is rectangular; in the direction parallel to the first side face, one end of the first main body part is overlapped with the first end face, a gap is reserved between the other end of the first main body part and the second end face, the identification part is overlapped with the second end face, and a gap is reserved between the first main body part and the identification part;

when the second inner electrode is provided with the identification part, the first inner electrode is connected with the first outer electrode, and the first inner electrode is insulated from the second outer electrode; the second main body part is rectangular; in a direction parallel to the first side surface, one end of the second main body portion overlaps the second end surface, the other end of the second main body portion has a gap from the first end surface, the identification portion overlaps the first end surface, and the second main body portion has a gap from the identification portion.

Preferably, the first external electrode completely covers the first end surface and extends to the upper surface, the lower surface, the first side surface and the second side surface; the second external electrode completely covers the second end face and extends to the upper surface, the lower surface, the first side face and the second side face; the first outer electrode and the second outer electrode are spaced and insulated.

Preferably, the first main body part and the second main body part have gaps with the first side surface and the second side surface. This prevents moisture from penetrating into the body portion and also prevents the body portion and the external electrode from short-circuiting or flashover between the first and second side surfaces.

Preferably, the identification portion is a right trapezoid, a right waist of the identification portion is parallel to the first end surface or the second end surface, and an oblique waist of the identification portion is close to the first main body portion or the second main body portion.

More preferably, the acute angle formed by the oblique waist and the first end surface or the second end surface is 30 to 60 °.

Preferably, when the first internal electrode is provided with the identification portion, the shortest distance from the identification portion to the first side surface is not greater than the shortest distance from the first main body portion to the first side surface, and the shortest distance from the identification portion to the second side surface is not greater than the shortest distance from the first main body portion to the second side surface;

when the second inner electrode is provided with the identification part, the shortest distance from the identification part to the first side surface is not more than the shortest distance from the second main body part to the first side surface, and the shortest distance from the identification part to the second side surface is not more than the shortest distance from the second main body part to the second side surface.

Preferably, when the first inner electrode is provided with the identification portion, the distance from the oblique waist of the identification portion to the second end face is not more than 1mm and not less than 0.04 mm; when the second inner electrode is provided with the identification part, the distance from the oblique waist of the identification part to the first end surface is not more than 1mm and not less than 0.04 mm.

Preferably, when the first inner electrode is provided with the identification portion, the distance from the oblique waist of the identification portion to the first main body portion is not more than 1mm and not less than 0.04 mm; when the second internal electrode is provided with the identification part, the distance from the oblique waist of the identification part to the second main body part is not more than 1mm and not less than 0.04 mm.

Setting the minimum distance from the oblique waist to the second end face as c, setting the maximum distance from the oblique waist to the second end face as d, wherein c is too small, the process allowance reserved by errors in the capacitor cutting process is insufficient, and the cutting position in the X direction easily falls between the oblique waists of the identification part, so that a blind area exists in the detection and judgment of the position of the section; if c is too large, the identification portion occupies a large area, while the main portion occupies a small area, which is not favorable for increasing the capacitance of the multilayer ceramic capacitor. If d is too small, short circuit or discharge is likely to occur between the identification portion and the main body portion; too large d is disadvantageous in terms of miniaturization and high capacity of the multilayer ceramic capacitor.

Preferably, the identification part is rounded at both ends of the oblique waist to reduce the concentration of the electric charge at the capacitor during charging, thereby preventing the occurrence of point discharge between the identification part and the main body part.

Preferably, when the first internal electrode and/or the second internal electrode are right trapezoid-shaped, the internal electrode further comprises at least one third internal electrode, and the third internal electrode is laminated on a different ceramic dielectric layer.

Preferably, when the first inner electrode is a right trapezoid, the bottom side of the right trapezoid is parallel to the first side surface or the second side surface, and the distance from the oblique waist of the identification portion to the second end surface is not greater than 1mm and not less than 0.04 mm; the distance from the first internal electrode to the first side face is not greater than the distance from the second internal electrode to the first side face; the distance from the first internal electrode to the second side surface is not more than the distance from the second internal electrode to the second side surface;

when the second inner electrode is in a right trapezoid shape, the bottom side of the right trapezoid is parallel to the first side surface or the second side surface, and the distance from the oblique waist of the identification part to the first end surface is not more than 1mm and not less than 0.04 mm; the distance from the second internal electrode to the first side face is not greater than the distance from the first internal electrode to the first side face; the distance from the second internal electrode to the second side surface is not greater than the distance from the first internal electrode to the second side surface.

Preferably, when the first internal electrode is a right trapezoid, a right-angled waist of the right trapezoid is parallel to the first side surface or the second side surface, a distance from the first internal electrode to the first end surface is not greater than a distance from the second internal electrode to the first end surface, and a distance from the first internal electrode to the second end surface is not greater than a distance from the third internal electrode to the second end surface; the distance from the oblique waist to the first side face is not more than 1mm and not less than 0.04 mm.

Preferably, the material of the ceramic dielectric layer is at least one of barium titanate ceramic, magnesium titanate ceramic and calcium zirconate ceramic; the material of the inner electrode is at least one of silver, palladium, silver-palladium alloy, nickel, copper and nickel-copper alloy; the material of the outer electrode is at least one of silver, palladium, silver-palladium alloy, nickel, copper and nickel-copper alloy.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses a multilayer ceramic capacitor can provide positional information for the inspector at the grinding in-process, makes the inspector know the concrete position of current section in the sample and the grinding depth of current section, can improve the effect and the efficiency of microsection inspection analysis to the capacity scope of condenser is wide, can satisfy the requirement of miniaturization and high-volume quantization.

Drawings

FIG. 1 is a schematic external view of a multilayer ceramic capacitor according to example 1;

FIG. 2 is a schematic external view of a ceramic body of the multilayer ceramic capacitor of example 1;

FIG. 3 is a cross-sectional view of the multilayer ceramic capacitor of FIG. 1;

FIG. 4 is another cross-sectional view of the multilayer ceramic capacitor of FIG. 1;

FIG. 5 is a schematic view of a screen pattern for printing an inner electrode of the multilayer ceramic capacitor of example 1;

FIGS. 6 to 9 are sectional views of the multilayer ceramic capacitor of example 1 polished in the Y direction;

FIGS. 10 and 11 are sectional views of a multilayer ceramic capacitor according to example 2;

FIG. 12 is a sectional view of a multilayer ceramic capacitor of example 3;

FIG. 13 is another sectional view of the multilayer ceramic capacitor of example 3;

FIG. 14 is a schematic view of a screen pattern for printing a first internal electrode of the multilayer ceramic capacitor of example 3;

fig. 15 is a schematic view of a screen pattern for printing the second and third internal electrodes of the multilayer ceramic capacitor of example 3;

FIG. 16 is a sectional view of a multilayer ceramic capacitor of example 4;

FIG. 17 is a sectional view of a multilayer ceramic capacitor of example 5;

100, a multilayer ceramic capacitor; 10. a ceramic body; 20. a first external electrode; 30. a second external electrode; s1, an upper surface; s2, lower surface; s3, a first end surface; s4, a second end face; s5, a first side face; s6, a second side surface; 12. a ceramic dielectric layer; 14. a first internal electrode; 16. a second internal electrode; 18. a third internal electrode; 142. a main body portion; 144. an identification unit.

Detailed Description

For better illustrating the objects, technical solutions and advantages of the present invention, the present invention will be further described with reference to the accompanying drawings and specific embodiments.

Example 1

An embodiment of multilayer ceramic capacitor, this embodiment multilayer ceramic capacitor's concrete structure combines attached figure 1 ~ 9 to explain:

referring to fig. 1, 2, 3 and 4, the multilayer ceramic capacitor 100 includes a ceramic body 10, first and second

external electrodes

20 and 30. The ceramic body 10 is a rectangular parallelepiped having six faces formed by stacking a plurality of ceramic medium layers 12, and includes an upper face S1, a lower face S2, a first end face S3, a second end face S4, a first side face S5, and a second side face S6, the upper face S1 and the lower face S2 are opposed to each other and perpendicular to the stacking direction Z of the ceramic medium layers 12, the first end face S3 and the second end face S4 are opposed to each other and perpendicular to the direction X, and the first side face S5 and the second side face S6 are opposed to each other and perpendicular to the direction Y.

The first external electrode 20 completely covers the first end surface S3 and extends along portions of the upper surface S1, the lower surface S2, the first side surface S5 and the second side surface S6 to form a crown-shaped structure. The second external electrode 30 completely covers the second end surface S4 and follows portions extending to the upper surface S1, the lower surface S2, the first side surface S5 and the second side surface S6, forming a crown-shaped structure. The first and second

external electrodes

20 and 30 are spaced apart from each other and insulated.

The ceramic body 10 includes an internal electrode. The internal electrodes include a plurality of first internal electrodes 14 and a plurality of second internal electrodes 16. The first and second

internal electrodes

14 and 16 are located inside the ceramic body 10 and are alternately laminated on the surfaces of different ceramic dielectric layers 12 along the Z direction. The first internal electrode 14 and the second internal electrode 16 are located in planes parallel to the upper surface S1.

The first internal electrode 14 includes a main body portion 142 and a recognition portion 144. The main body 142 is rectangular. One side of the body part 142 is on the first end surface S3 and electrically connected to the first external electrode 20, and the other side is formed with a gap from the second end surface S4 to insulate the body part 142 from the second external electrode 30. Preferably, a gap is formed between the main body part 142 and each of the first side surface S5 and the second side surface S6 to prevent moisture from penetrating into the main body part 142, and to prevent a short circuit or a flashover between the main body part 142 and an extended portion of the second outer electrode 30 on the first side surface S5 and the second side surface S6.

The identification portion 144 has a right trapezoid shape, a waist AB of the identification portion 144 perpendicular to the base is electrically connected to the second external electrode 30 on the first side surface S5, and a gap is formed between the oblique waist CD of the identification portion 144 and the main body portion 142 to insulate the main body portion 142 from the identification portion 144. A gap is formed between the recognition part 144 and each of the first and second side surfaces S5 and S6. Preferably, the distance from the identification part 144 to the first side surface S5 is less than or equal to the distance from the main body part 142 to the first side surface S5, and the distance from the identification part 144 to the second side surface S6 is less than or equal to the distance from the main body part 142 to the second side surface S6. The length of the upper base AC, i.e., the distance C from the second end face S4, is C, and the distance D from the point D to the main body portion 142 is D.

The second internal electrode 16 has a rectangular shape with one side on the second end surface S4 and electrically connected to the second external electrode 30 and the other side having a gap with the first end surface S3 to insulate the second internal electrode 16 from the first external electrode 20. Preferably, a gap is formed between the second internal electrode 16 and each of the first and second side surfaces S5 and S6 to prevent moisture from penetrating into the second internal electrode 16, and to prevent a short circuit or a flashover between the second internal electrode 16 and the first external electrode 20 at the first and second side surfaces S5 and S6. Preferably, the distance from the second internal electrode 16 to the first side surface S5 is equal to the distance from the main body portion 142 to the first side surface S5, and the distance from the second internal electrode 16 to the second side surface S6 is equal to the distance from the main body portion 142 to the second side surface S6. The second internal electrode 16 partially overlaps the body portion 142 in the Z direction to form capacitance, and therefore the body portion 142 plays a major role in generating an amount of capacitance. Although the recognition portion 144 overlaps at least a part of the second inner electrode 16 in the Z direction, the recognition portion 144 and the second inner electrode 16 are electrically connected to the second outer electrode 30, and therefore the contribution of the recognition portion 144 to the capacitance is negligible.

When the multilayer ceramic capacitor 100 is ground in the Y direction and the cross section intersects the main body portion 142, for example, when the cross section is at the position of line i-i in fig. 3, the main body portion 142 appears as a line segment in the cross section, and the identification portion 144 also appears as a line segment in the cross section, and the distance between the two line segments is e. In particular, when the cross section intersects the first inner electrode 14 at the lower base BD, e-d. Since the oblique waist CD of the identification part 144 faces the main body part 142, e varies linearly according to the polishing depth, and the position of the current cross section in the multilayer ceramic capacitor 100 can be estimated by measuring the magnitude of e, thereby improving the effect and efficiency of the microsection examination and analysis.

The first and second

internal electrodes

14 and 16 may be manufactured by printing a metal paste on the ceramic dielectric layer 12 using a screen patterned as shown in fig. 5. The plurality of ceramic dielectric layers 12 printed with the patterns are stacked in a reciprocating offset manner at a constant distance, so that a plurality of first internal electrodes 14 and a plurality of second internal electrodes 16 are alternately stacked. It is to be noted that the multilayer ceramic capacitor 100 manufactured by using the wire mesh patterned as shown in fig. 5 has four cases of the laminated arrangement of the internal electrodes: the first is that the number of the inner electrodes is odd, and the inner electrodes closest to the upper surface S1 and the lower surface S2 are the first inner electrodes 14, as shown in fig. 6; second, the number of the inner electrodes is odd, and the inner electrodes closest to the upper surface S1 and the lower surface S2 are the second inner electrodes 16, as shown in fig. 7; the third is that the number of the inner electrodes is even, the inner electrode closest to the upper surface S1 is the first inner electrode 14, and the inner electrode closest to the lower surface S2 is the second inner electrode 16, as shown in fig. 8; fourth, the number of the inner electrodes is even, the inner electrode closest to the upper surface S1 is the second inner electrode 16, and the inner electrode closest to the lower surface S2 is the first inner electrode 14, as shown in fig. 9. The multilayer ceramic capacitor 100 in which the four kinds of internal electrodes are stacked has symmetry in the Z direction, and the orientation of the multilayer ceramic capacitor 100 in the mold is random, so that the position of the current cross section in the multilayer ceramic capacitor 100 can be known only from one cross section, and it cannot be determined whether the current cross section is ground from the first side surface S5 to the position or from the second side surface S6 to the position, that is, the current grinding depth cannot be known. To know the current grinding depth, the e values of the two profiles need to be measured sequentially, so that the current grinding depth can be estimated by combining the change of the e values.

Preferably, c is 0.04mm or less and 1mm or less, and if c is too small, the process margin reserved for errors in the capacitor cutting process is insufficient, the cut position in the X direction easily falls on the oblique CD of the identification portion 144, which may cause a blind zone in the detection judgment of the position of the cross section, if c is too large, the identification portion 144 occupies a large area, and the main body portion 142 has a small area, which is not favorable for increasing the capacitance of the multilayer ceramic capacitor 100, and if d is too small, d is preferably 0.04mm or less and 1mm or less, if d is too small, short circuit or discharge is likely to occur between the identification portion 144 and the main body portion 142, if d is too large, which is unfavorable for downsizing and increasing the capacity of the multilayer ceramic capacitor 100, and if ∠ CDB is 30 ° to 60 °, ∠ CDB < 30 °, the identification portion 144 occupies a large area, which is not favorable for increasing the capacitance of the multilayer ceramic capacitor 100, and if ∠ CDB > 60 °, the detection resolution is.

Preferably, the point D may be slightly rounded to reduce the concentration of charges therein when the capacitor is charged, thereby preventing the tip discharge between the recognition part 144 and the main body part 142.

Preferably, the thickness of each ceramic dielectric layer 12, i.e., the distance between adjacent internal electrodes in the Z direction, is equal.

In other embodiments, the main body 142 may be electrically connected to the second outer electrode 30, and the identification portion 144 may be electrically connected to the first outer electrode 20.

In this embodiment, the second internal electrode 16 is rectangular, so that a larger overlapping area can be formed between the second internal electrode and the main body 142, which is beneficial to increase the capacitance of the multilayer ceramic capacitor 100. In other embodiments, the second inner electrode 16 may be other shapes.

In other embodiments, only the first internal electrode 14 and no second internal electrode 16 may be provided.

The material of the ceramic dielectric layer 12 may be, but is not limited to, barium titanate ceramic, magnesium titanate ceramic, and calcium zirconate ceramic. The material of the inner electrode may be silver, palladium, silver palladium alloy, nickel, copper, nickel copper alloy, but is not limited thereto. The material of the first and second

external electrodes

20 and 30 may be silver, palladium, silver palladium alloy, nickel, copper, nickel copper alloy, but is not limited thereto.

Fig. 5 is only an exemplary illustration of a plurality of pattern units, and in practice, the number of pattern units may be more to meet the production capacity requirement.

Example 2

An embodiment of the multilayer ceramic capacitor, this embodiment the concrete structure of multilayer ceramic capacitor is explained with reference to fig. 10 ~ 11:

the difference from example 1 is that: both of the two inner electrodes closest to the second side S2 are the first inner electrodes 14, as shown in fig. 10; or both, as shown in fig. 11. In this way, the multilayer ceramic capacitor 100 is significantly asymmetric in the Z-direction, so that the position of the current cross-section in the multilayer ceramic capacitor 100 and the current polishing depth can be known by only one cross-section. In other embodiments, both of the two inner electrodes closest to the first side S1 may be the first inner electrode 14, or both may be the second inner electrodes 16. In other embodiments, the distance from the inner electrode closest to the first side S1 to the first side S1 and the distance from the inner electrode closest to the second side S2 to the second side S2 may be set to be unequal, a particularly thick ceramic dielectric layer 12 may be inserted at a position closer to the first side S1 or closer to the second side S2, and so on, as long as the inspector can be provided with "asymmetry" information, and the current position of the current cross section in the multilayer ceramic capacitor 100 and the current polishing depth can be known by one cross section.

Example 3

An embodiment of the multilayer ceramic capacitor, this embodiment the concrete structure of multilayer ceramic capacitor is explained in conjunction with fig. 12 ~ 13:

with reference to fig. 12 and 13, the difference from embodiment 1 is that: the internal electrodes include a first internal electrode 14 and a plurality of second internal electrodes 16 and a plurality of third internal electrodes 18. The second internal electrodes 16 and the third internal electrodes 18 are alternately laminated on the surfaces of different ceramic dielectric layers 12 along the Z direction inside the ceramic body 10. The third internal electrode 18 has a rectangular shape with one side on the first end surface S3 and electrically connected to the first external electrode 20 and the other side having a gap with the second end surface S4 to insulate the third internal electrode 18 from the second external electrode 30. Preferably, the distance from the third internal electrode 18 to the first side surface S5 is equal to the distance from the second internal electrode 16 to the first side surface S5, and the distance from the third internal electrode 18 to the second side surface S6 is equal to the distance from the second internal electrode 16 to the second side surface S6. In the present embodiment, the first internal electrode 14 is the internal electrode closest to the upper surface S1. In other embodiments, the first inner electrode 14 is the inner electrode closest to the lower surface S2. In other embodiments, the main body 142 is electrically connected to the second outer electrode 30, and the identification portion 144 is electrically connected to the first outer electrode 20, so that the first inner electrode 14 can perform the function of trimming the capacitance.

The first internal electrode 14 may be manufactured by printing a metal paste on the ceramic dielectric layer 12 using a screen having a pattern as shown in fig. 14. The second and third

internal electrodes

16 and 18 may be manufactured by printing a metal paste on the ceramic dielectric layer 12 using a screen patterned as shown in fig. 15. The multilayer ceramic capacitor 100 of the present embodiment has asymmetry in the Z-direction, so that the position of the current cross-section in the multilayer ceramic capacitor 100 and the current polishing depth can be known by only one cross-section. Moreover, in the present embodiment, only one first internal electrode 14 is provided, and it is obviously easier to obtain a larger overlapping area between the third internal electrode 18 and the second internal electrode 16 than between the first internal electrode 14 and the second internal electrode 16 in embodiment 1, and therefore, it is advantageous to increase the capacitance of the multilayer ceramic capacitor 100. On the other hand, the multilayer ceramic capacitor 100 of the present embodiment is not convenient in production as compared with embodiment 1 because two different patterns of wire mesh are required.

In this embodiment, the third internal electrode 18 has a rectangular shape, so that a larger overlapping area with the second internal electrode 16 can be formed, which is advantageous for increasing the capacitance of the multilayer ceramic capacitor 100. In other embodiments, the third inner electrode 18 may be other shapes.

Example 4

An embodiment of the multilayer ceramic capacitor, this embodiment the concrete structure of multilayer ceramic capacitor is explained with reference to fig. 14 ~ 16:

with reference to fig. 16, the difference from embodiment 3 is that: the first internal electrode 14 has a right trapezoid shape. The first inner electrode 14 is formed with gaps from the first end surface S3, the second end surface S4, the first side surface S5, and the second side surface S6. The bottom edge of the first internal electrode 14 is parallel to the first side surface S5. Preferably, the distance from the first internal electrode 14 to the first side surface S5 is less than or equal to the distance from the second internal electrode 16 to the first side surface S5, and the distance from the first internal electrode 14 to the second side surface S6 is less than or equal to the distance from the second internal electrode 16 to the second side surface S6. Preferably, the distance from the first inner electrode 14 to the first end surface S3 is 0.04 to 1mm, and the distance from the point D to the second end surface S4 is 0.04 to 1 mm.

Example 5

An embodiment of the multilayer ceramic capacitor of the present invention, the specific structure of the multilayer ceramic capacitor is described with reference to fig. 17:

with reference to fig. 17, the difference from embodiment 3 is that: the first internal electrode 14 has a right trapezoid shape. The first inner electrode 14 is formed with gaps from the first end surface S3, the second end surface S4, the first side surface S5, and the second side surface S6. The bottom side of the first internal electrode 14 is parallel to the first end surface S3. Preferably, the distance from the first internal electrode 14 to the first end surface S3 is less than or equal to the distance from the second internal electrode 16 to the first end surface S3, and the distance from the first internal electrode 14 to the second end surface S4 is less than or equal to the distance from the third internal electrode 18 to the second end surface S4. Preferably, the distance from the first inner electrode 14 to the second side surface S6 is 0.04 to 1mm, and the distance from the point D to the first side surface S5 is 0.04 to 1 mm. This embodiment is applied to the case where the multilayer ceramic capacitor 100 is polished in the Y direction.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A multilayer ceramic capacitor is characterized by comprising a ceramic body, a first external electrode, a second external electrode and an internal electrode, wherein the ceramic body is a cuboid formed by laminating a plurality of ceramic dielectric layers, and comprises an upper surface and a lower surface which are opposite to each other, a first end surface and a second end surface which are opposite to each other, and a first side surface and a second side surface which are opposite to each other;

alternatively, the first and second electrodes may be,

2. The multilayer ceramic capacitor according to claim 1, wherein the first external electrode completely covers the first end surface and extends to the upper surface, the lower surface, the first side surface and the second side surface; the second external electrode completely covers the second end face and extends to the upper surface, the lower surface, the first side face and the second side face; the first outer electrode and the second outer electrode are spaced and insulated.

3. The multilayer ceramic capacitor according to claim 1, wherein the identification portion has a right-angled trapezoidal shape, a right-angled waist of the identification portion is parallel to the first end surface or the second end surface, and an inclined waist of the identification portion is adjacent to the first main body portion or the second main body portion.

4. The multilayer ceramic capacitor according to claim 3, wherein the acute angle formed by the sloped waist and the first end face or the second end face is 30 ° to 60 °.

5. The multilayer ceramic capacitor according to claim 3 or 4, wherein when the first internal electrode is provided with the identification portion, the shortest distance from the identification portion to the first side surface is not more than the shortest distance from the first main body portion to the first side surface, and the shortest distance from the identification portion to the second side surface is not more than the shortest distance from the first main body portion to the second side surface;

6. The multilayer ceramic capacitor according to claim 3 or 4, wherein when the first internal electrode is provided with a recognized part, a distance from a slant waist of the recognized part to the second end face is not more than 1mm and not less than 0.04 mm; when the second inner electrode is provided with the identification part, the distance from the oblique waist of the identification part to the first end surface is not more than 1mm and not less than 0.04 mm.

7. The multilayer ceramic capacitor according to claim 3 or 4, wherein when the first internal electrode is provided with the identification portion, the distance from the oblique waist of the identification portion to the first main body portion is not more than 1mm and not less than 0.04 mm; when the second internal electrode is provided with the identification part, the distance from the oblique waist of the identification part to the second main body part is not more than 1mm and not less than 0.04 mm.

8. The multilayer ceramic capacitor according to claim 1, wherein when the first internal electrode and/or the second internal electrode has a right trapezoid shape, the internal electrodes further comprise at least one third internal electrode laminated on different ceramic dielectric layers.

9. The multilayer ceramic capacitor according to claim 1 or 8, wherein when the first internal electrode is a right trapezoid, the base of the right trapezoid is parallel to the first side face or the second side face, and the distance from the oblique waist of the identification portion to the second end face is not more than 1mm and not less than 0.04 mm; the distance from the first internal electrode to the first side face is not more than the distance from the second internal electrode and/or the third internal electrode to the first side face; the distance from the first internal electrode to the second side surface is not more than the distance from the second internal electrode and/or the third internal electrode to the second side surface;

when the second inner electrode is in a right trapezoid shape, the bottom side of the right trapezoid is parallel to the first side surface or the second side surface, and the distance from the oblique waist of the identification part to the first end surface is not more than 1mm and not less than 0.04 mm; the distance from the second internal electrode to the first side face is not more than the distance from the first internal electrode and/or the third internal electrode to the first side face; the distance from the second internal electrode to the second side surface is not more than the distance from the first internal electrode and/or the third internal electrode to the second side surface.

10. The multilayer ceramic capacitor according to claim 9, wherein when the first internal electrode is a right trapezoid, a right-angled waist of the right trapezoid is parallel to the first side face or the second side face, a distance from the first internal electrode to the first end face is not more than a distance from the second internal electrode to the first end face, and a distance from the first internal electrode to the second end face is not more than a distance from the third internal electrode to the second end face; the distance from the oblique waist to the first side face is not more than 1mm and not less than 0.04 mm.