Capacitor printing plate and preparation method of capacitor

Abstract

The invention relates to a capacitor printing plate and a preparation method of a capacitor, and belongs to the technical field of capacitors. According to the invention, the opposite sides of any two adjacent first cutting line patterns are respectively provided with the first convex part and the first concave part, and the opposite sides of any two adjacent second cutting line patterns are respectively provided with the second convex part and the second concave part, so that the gap accumulation in the laminated structure of the printing sheet can be effectively reduced; therefore, the interlayer binding force of the laminated structure of the printing sheet is improved, the phenomena of delamination and lamination precision deterioration in the subsequent processing process are avoided, and the qualified rate of capacitor products is further ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of capacitors and relates to a capacitor printing plate and a method for preparing a capacitor. Background Art

[0002] Multilayer ceramic chip capacitors (MLCCs) are one of the most widely used and fastest-growing chip components in the world. They are mainly made by alternately stacking ceramic dielectric layers and metal conductive layers, and are widely used in electronic equipment terminals.

[0003] At present, multilayer ceramic chip capacitors are prepared by casting a mixed ceramic slurry on a thin film carrier to form a uniform dielectric layer, then printing an internal electrode on the dielectric layer by a printer, and then laminating, pressing, cutting, and sintering the dielectric layer printed with the internal electrode. In the prior art, a printing press uses a printing plate, and the printing plate used generally includes a cutting line pattern distributed along the X-axis direction, a cutting line pattern distributed along the Y-axis direction, a product pattern, and a margin area between the patterns, wherein the product pattern is used to form an internal electrode during printing, the cutting line pattern is used to form a cutting line during printing, and the formed cutting line assists in identifying the cutting position during cutting, and the margin area between the patterns is used to form a margin area between two adjacent cutting lines during printing. During actual use of this printed plate structure design, after the inner electrode is printed on the dielectric layer and the dielectric layers are stacked, gaps will appear in the margin area between two adjacent dielectric layers printed with the inner electrodes. There is a lack of nickel paste bonding between the upper and lower dielectric layers in the gaps. After stacking, the gaps between the dielectric layers accumulate, resulting in poor adhesion at the edges, poor bonding between layers, and easy delamination, which in turn leads to deterioration of product performance. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a capacitor printing plate and a method for preparing a capacitor.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0006] In a first aspect, the present invention provides a capacitor printed plate comprising a product area, a cutting line area and a fixed area, wherein the cutting line area and the fixed area are arranged around the product area, a plurality of product graphics are arranged in the product area, and a fixed block graphic is arranged in the fixed area. The cutting line area comprises a plurality of first cutting line graphics and a plurality of second cutting line graphics, wherein the plurality of first cutting line graphics are arranged along the Y-axis direction of the capacitor printed plate, and a first margin area is left between any two adjacent first cutting line graphics, and the plurality of second cutting line graphics are arranged along the X-axis direction of the capacitor printed plate, and a second margin area is left between any two second cutting line graphics, and at least one of (I) to (II) is satisfied:

[0007] (I) Among the facing sides of any two adjacent first cutting line patterns, one facing side is provided with a first protruding portion, and the other facing side is provided with a first recessed portion;

[0008] (II) Among the facing sides of any two adjacent second cutting line patterns, one facing side is provided with a second protruding portion, and the other facing side is provided with a second recessed portion.

[0009] Preferably, in any two adjacent first cutting line patterns, the size of the first protrusion in the Y-axis direction of the capacitor printed plate is a1, the size of the first margin area in the Y-axis direction of the capacitor printed plate is b1, 0<a1 / b1≤1.2, further, 0.3≤a1 / b1≤1;

[0010] And / or, in any two adjacent second cutting line graphics, the size of the second protrusion in the X-axis direction of the capacitor printed plate is a2, and the size of the second margin area in the X-axis direction of the capacitor printed plate is b2, 0<a2 / b2≤1.2, and further, 0.3≤a2 / b2≤1.

[0011] Preferably, the size of the first protrusion in the X-axis direction of the capacitor printed plate is c1, and in any two adjacent first cutting line patterns, the size of one first cutting line pattern in the X-axis direction of the capacitor printed plate is d1, and the size of the other first cutting line pattern in the X-axis direction of the capacitor printed plate is d2, 0.1≤c1 / d1≤0.4, 0.2≤c1 / d2≤0.8; further, 0.2≤c1 / d1≤0.3, 0.4≤c1 / d2≤0.6;

[0012] And / or, the size of the second protrusion in the Y-axis direction of the capacitor printed plate is c2, and the sizes of any two adjacent second cutting line graphics in the Y-axis direction of the capacitor printed plate are the same, both are d3, 0.1≤c2 / d3≤0.8; further, 0.2≤c2 / d3≤0.4.

[0013] Further preferably, a plurality of first cutting line patterns are aligned on a side away from the product area;

[0014] And / or, any two adjacent second cutting line patterns have the same size in the Y-axis direction of the capacitor printed plate.

[0015] Preferably, first convex portions are respectively provided on both sides of one first cutting line pattern, and the two first convex portions are symmetrical in the X-axis direction of the capacitor printed plate, and first concave portions are respectively provided on both sides of another first cutting line pattern, and the two first concave portions are symmetrical relative to the X-axis direction of the capacitor printed plate, so that the first cutting line pattern provided with the first convex portions and the first cutting line pattern provided with the first concave portions are alternately arranged in the Y-axis direction of the capacitor printed plate;

[0016] And / or, in any two adjacent second cutting line graphics, second protrusions are respectively provided on both sides of one of the second cutting line graphics, and the two second protrusions are symmetrical with respect to the Y-axis direction of the capacitor printed plate, and second recesses are respectively provided on both sides of the other second cutting line graphics, and the two second recesses are symmetrical with respect to the Y-axis direction of the capacitor printed plate, so that the second cutting line graphics provided with second protrusions and the second cutting line graphics provided with second recesses are alternately arranged in the X-axis direction of the capacitor printed plate.

[0017] Preferably, the first protrusion and the first recess are complementary in shape;

[0018] And / or, the second protrusion and the second recess are complementary in shape.

[0019] Preferably, the shape of the first protrusion is any one of an arcuate shape, a polygonal shape, a rounded polygonal shape, and a sawtooth shape;

[0020] And / or, the second protrusion has a shape of any one of an arcuate shape, a polygonal shape, a rounded polygonal shape, and a sawtooth shape.

[0021] Preferably, the shapes of opposite sides of the fixing block pattern and the adjacent first cutting line pattern are complementary;

[0022] And / or, the shapes of opposite sides of the fixing block pattern and its adjacent second cutting line pattern are complementary.

[0023] Furthermore, a first margin area is left between the fixed block pattern and the first cutting line pattern adjacent to it;

[0024] And / or, a second margin area is left between the fixed block pattern and its adjacent second cutting line pattern.

[0025] In a second aspect, the present invention provides a method for preparing a capacitor, comprising the following steps:

[0026] S1. Prepare a dielectric layer, use a printing device to print electrode slurry on the dielectric layer, and obtain a printed sheet by peeling; the printing device has a capacitor printing plate as described in the first aspect;

[0027] S2, laminating the printed sheets obtained in step S1 and cutting them to obtain a laminate;

[0028] S3. Sintering the laminate obtained in step S2 to obtain a capacitor.

[0029] Preferably, the printing device is any one of a gravure printing device, a relief printing device, a lithographic printing device and a screen printing device.

[0030] Preferably, in step S1, the method for preparing the dielectric layer includes: forming the dielectric layer by tape casting a ceramic slurry.

[0031] Preferably, step S2 specifically comprises: stacking the printed sheets obtained in step S1 in a preset manner to a predetermined number of layers, and then cutting them vertically and horizontally according to the markings of the margin areas and cutting lines to obtain a laminated body.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] The present invention can effectively reduce the accumulation of gaps in the printed sheet stacking structure, improve the interlayer bonding strength of the printed sheet stacking structure, avoid delamination and deterioration of stacking accuracy in subsequent processing, and thus ensure the qualified rate of capacitor products by respectively arranging a first protrusion and a first recessed portion on the opposite sides of any two adjacent first cutting line patterns, and respectively arranging a second protrusion and a second recessed portion on the opposite sides of any two adjacent second cutting line patterns. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A schematic plan view of a capacitor printed plate provided in Example 1;

[0035] Figure 2 for Figure 1 A magnified view of part A;

[0036] Figure 3 A partial schematic diagram of a capacitor printed plate provided in Example 8;

[0037] Figure 4 A partial schematic diagram of a capacitor printed plate provided in Example 9;

[0038] Figure 5 A partial schematic diagram of a capacitor printed plate provided in Example 10;

[0039] Figure 6 This is a schematic plan view of the capacitor printed plate provided for Comparative Example 1.

[0040] In the figure, 1-product graphic, 2-first cutting line graphic, 21-first raised portion, 22-first recessed portion, 3-second cutting line graphic, 31-second raised portion, 32-second recessed portion, 4-first margin area, 5-second margin area, 6-fixed block graphic. DETAILED DESCRIPTION

[0041] To better illustrate the purpose, technical solutions and advantages of the present invention, the present invention will be further described below in conjunction with specific embodiments. It should be understood by those skilled in the art that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0042] See also Figures 1 to 5 In a first aspect, the present invention provides a capacitor printed plate comprising a product area, a cutting line area and a fixed area, wherein the cutting line area and the fixed area are arranged around the product area, wherein a plurality of product graphics 1 are arranged in the product area, and a fixed block graphic 6 is arranged in the fixed area, wherein the cutting line area comprises a plurality of first cutting line graphics 2 and a plurality of second cutting line graphics 3, wherein the plurality of first cutting line graphics 2 are arranged along the Y-axis direction of the capacitor printed plate, and a first margin area 4 is left between any two adjacent first cutting line graphics 2, and the plurality of second cutting line graphics 3 are arranged along the X-axis direction of the capacitor printed plate, and a second margin area 5 is left between any two second cutting line graphics 3, and at least one of (I) to (II) is satisfied:

[0043] (I) Among the facing sides of any two adjacent first cutting line patterns 2, one facing side is provided with a first protruding portion 21, and the other facing side is provided with a first recessed portion 22;

[0044] (II) Among the facing sides of any two adjacent second cutting line patterns 3, one facing side is provided with a second protruding portion 31, and the other facing side is provided with a second recessed portion 32.

[0045] In the present invention, the product pattern 1 is used to form an internal electrode on the dielectric layer; the fixed block pattern 6 is used to form a fixed block on the dielectric layer, and the fixed block plays a role in fixing the printed sheet during lamination; the first cutting line pattern 2 is used to form a first cutting line on the dielectric layer; the second cutting line pattern 3 is used to form a second cutting line on the dielectric layer; the first margin area 4 is used to form a first margin area between any two adjacent first cutting lines on the dielectric layer after printing, and the second margin area 5 is used to form a second margin area between any two adjacent second cutting lines on the dielectric layer after printing. The first margin area and the second margin area can play a role in assisting in identifying the cutting position during the cutting process.

[0046] The present invention respectively sets a first raised portion 21 and a first recessed portion 22 on the opposite sides of any two adjacent first cutting line patterns 2, and respectively sets a second raised portion 31 and a second recessed portion 32 on the opposite sides of any two adjacent second cutting line patterns 3, so that when a plurality of printed sheets are stacked in sequence, in any two adjacent printed sheets, the raised portion of one printed sheet and the recessed portion of another printed sheet are correspondingly stacked, which can effectively reduce the accumulation of gaps in the printed sheet stacking structure, improve the interlayer bonding force of the printed sheet stacking structure, avoid delamination and deterioration of stacking accuracy in subsequent processing, and thus ensure the qualified rate of capacitor products.

[0047] In one embodiment, the first protrusion 21 and the first recess 22 are complementary in shape;

[0048] And / or, the second protrusion 31 and the second recess 32 are complementary in shape.

[0049] It is understandable that the present invention has no particular limitation on the shape of the first protrusion 21 and the shape of the first recessed portion 22. As long as the shapes of the first protrusion 21 and the first recessed portion 22 are complementary, the shape of the first protrusion 21 can be any one of an arcuate shape, a polygon, a rounded polygon, and a sawtooth shape.

[0050] It is understandable that the present invention has no particular limitation on the shapes of the second protrusion 31 and the second recess 32. As long as the shapes of the second protrusion 31 and the second recess 32 are complementary, the shape of the second protrusion 31 can be any one of an arcuate shape, a polygon, a rounded polygon, and a sawtooth shape.

[0051] In one embodiment, a plurality of first cutting line patterns 2 are distributed at equal intervals along the Y-axis direction of the capacitor printing plate.

[0052] And / or, a plurality of second cutting line patterns 3 are distributed at equal intervals along the X-axis direction of the capacitor printing plate.

[0053] In one embodiment, in any two adjacent first cutting line patterns 2, the size of the first protrusion 21 in the Y-axis direction of the capacitor printed plate is a1, and the size of the first margin area 4 in the Y-axis direction of the capacitor printed plate is b1, 0<a1 / b1≤1, and further, 0.3≤a1 / b1≤1;

[0054] And / or, in any two adjacent second cutting line graphics 3, the size of the second protrusion 31 in the X-axis direction of the capacitor printed plate is a2, and the size of the second margin area 5 in the X-axis direction of the capacitor printed plate is b2, 0<a2 / b2≤1.2, and further, 0.3≤a2 / b2≤1.

[0055] The inventors have found that if 0.3≤a1 / b1≤1 and / or 0.3≤a2 / b2≤1, the gaps in the printed sheet laminate structure can be more effectively reduced, and the interlayer bonding force of the printed sheet laminate structure can be effectively improved.

[0056] In one embodiment, the size of the first protrusion 21 in the X-axis direction of the capacitor printed plate is c1, and in any two adjacent first cutting line patterns 2, the size of one first cutting line pattern 2 in the X-axis direction of the capacitor printed plate is d1, and the size of the other first cutting line pattern 2 in the X-axis direction of the capacitor printed plate is d2, 0.1≤c1 / d1≤0.4, 0.2≤c1 / d2≤0.8; further, 0.2≤c1 / d1≤0.3, 0.4≤c1 / d2≤0.6;

[0057] And / or, the size of the second protrusion 31 in the Y-axis direction of the capacitor printed plate is c2, the size of the second cutting line pattern 3 in the Y-axis direction of the capacitor printed plate is d3, 0.1≤c2 / d3≤0.8; further, 0.2≤c2 / d3≤0.4.

[0058] The inventors have found that if c1 / d1 and c1 / d2 are controlled within appropriate ranges, the provision of the first raised portion 21 and the first recessed portion 22 can not only ensure that the first margin area can normally play the role of assisting in identifying the cutting position, but also effectively improve the interlayer bonding strength of the printed sheet laminate structure.

[0059] If c2 / d3 is controlled within an appropriate range, the provision of the second protrusion 31 and the second depression 32 can not only ensure that the second margin area can normally play the role of assisting in identifying the cutting position, but also effectively improve the interlayer bonding strength of the printed sheet laminate structure.

[0060] Further, a plurality of first cutting line patterns 2 are aligned on a side away from the product area;

[0061] And / or, any two adjacent second cutting line patterns 3 have the same size in the Y-axis direction of the capacitor printed plate.

[0062] In one embodiment, in any two adjacent first cutting line patterns 2, first protrusions 21 are respectively provided on both sides of one of the first cutting line patterns 2, and the two first protrusions 21 are symmetrical with respect to the X-axis direction of the capacitor printed plate, and first recesses 22 are respectively provided on both sides of the other first cutting line pattern 2, and the two first recesses 22 are symmetrical with respect to the X-axis direction of the capacitor printed plate; thereby, the first cutting line pattern 2 provided with the first protrusion 21 and the first cutting line pattern 2 provided with the first recess 22 are alternately arranged in the Y-axis direction of the capacitor printed plate;

[0063] And / or, in any two adjacent second cutting line graphics 3, second protrusions 31 are respectively provided on both sides of one of the second cutting line graphics 3, and the two second protrusions 31 are symmetrical with respect to the Y-axis direction of the capacitor printed plate, and second recesses 32 are respectively provided on both sides of the other second cutting line graphics 3, and the two second recesses 32 are symmetrical with respect to the Y-axis direction of the capacitor printed plate, so that the second cutting line graphics 3 provided with the second protrusions 31 and the second cutting line graphics 3 provided with the second recesses 32 are alternately arranged in the X-axis direction of the capacitor printed plate.

[0064] In one embodiment, the shapes of the opposite sides of the fixing block pattern 6 and its adjacent first cutting line pattern 2 are complementary;

[0065] And / or, the shapes of opposite sides of the fixing block pattern 6 and the adjacent second cutting line pattern 3 are complementary.

[0066] Furthermore, a first margin area 4 is left between the fixed block pattern 6 and the adjacent first cutting line pattern 2;

[0067] And / or, a second margin area 5 is left between the fixed block pattern 6 and the adjacent second cutting line pattern 3 .

[0068] In a second aspect, the present invention provides a method for preparing a capacitor, comprising the following steps:

[0069] S1, preparing a dielectric layer, printing an electrode slurry on the dielectric layer using a printing device, and obtaining a printed sheet by peeling; the printing device has a capacitor printing plate as in the first aspect;

[0070] S2, laminating the printed sheets obtained in step S1 and cutting them to obtain a laminate;

[0071] S3. Sintering the laminate obtained in step S2 to obtain a capacitor.

[0072] In one embodiment, the printing device is any one of a gravure printing device, a relief printing device, a lithographic printing device, and a screen printing device.

[0073] In one embodiment, in step S1, the method for preparing the dielectric layer includes: casting a ceramic slurry to form the dielectric layer.

[0074] In one embodiment, step S2 specifically includes: stacking the printed sheets in a predetermined manner to a predetermined number of layers, and then cutting them vertically and horizontally according to the markings of the margin areas and cutting lines to obtain a laminated body.

[0075] The present invention provides the following examples and comparative examples to facilitate understanding of the present invention. The present invention provides these examples but is not intended to limit the scope of the claims.

[0076] Unless otherwise specified, the reagents, methods and equipment used in the present invention are conventional reagents, methods and equipment in the art.

[0077] Example 1

[0078] Embodiments of the capacitor printing plate and the method for preparing the capacitor of the present invention are as follows: Figures 2-3 As shown, the capacitor printed plate includes a product area, a cutting line area and a fixed area. The cutting line area and the fixed area are arranged around the product area. A plurality of product graphics 1 are arranged in the product area, a fixed block graphic 6 is arranged in the fixed area, and the cutting line area includes a plurality of first cutting line graphics 2 and a plurality of second cutting line graphics 3.

[0079] A plurality of first cutting line graphics 2 are arranged at equal intervals along the Y-axis direction of the capacitor printing plate, so that a first margin area 4 is left between any two adjacent first cutting line graphics 2, and a plurality of first cutting line graphics 2 are aligned on the side away from the product area; in any two adjacent first cutting line graphics 2, first protrusions 21 are respectively provided on both sides of one of the first cutting line graphics 2, and the two first protrusions 21 are symmetrical with respect to the X-axis direction of the capacitor printing plate, and first recesses 22 are respectively provided on both sides of the other first cutting line graphics 2, and the two first recesses 22 are symmetrical with respect to the X-axis direction of the capacitor printing plate, so that the first cutting line graphics 2 provided with the first protrusions 21 and the first cutting line graphics 2 provided with the first recesses 22 are alternately arranged in the Y-axis direction of the capacitor printing plate; the first protrusions 21 and the first recesses 22 are aligned in the Y-axis direction of the capacitor printing plate and have complementary shapes; the first cutting line graphics 2 excluding the first protrusions and the first recesses is a rectangle, and the shape of the first protrusion 21 is an isosceles triangle.

[0080] The size of the first raised portion 21 in the Y-axis direction of the capacitor printed plate (i.e., the height of the isosceles triangle) is a1, the size of the first margin area 4 in the Y-axis direction of the capacitor printed plate is b1, the size of the first raised portion 21 in the X-axis direction of the capacitor printed plate (i.e., the length of the base of the isosceles triangle) is c1, the size of the first cutting line graphic 2 provided with the first raised portion 21 in the X-axis direction of the capacitor printed plate is d1, and the size of the first cutting line graphic 2 provided with the first recessed portion 22 in the X-axis direction of the capacitor printed plate is d2, a1 / b1=1, c1 / d1=0.25, c1 / d2=0.5.

[0081] The second cutting line pattern 3 is a rectangle, and several second cutting line patterns 3 are arranged at equal intervals along the X-axis direction of the capacitor printed plate, so that a second margin area 5 is left between any two second cutting line patterns 3, and the size of the second margin area 5 in the X-axis direction is b2, and the size of the second cutting line pattern 3 in the Y-axis direction of the capacitor printed plate is d3.

[0082] The size of the fixed block pattern 6 in the X-axis direction of the capacitor printed plate is equal to d2, the size of the fixed block pattern 6 in the Y-axis direction of the capacitor printed plate is equal to d3, the opposite sides of the fixed block pattern 6 and its adjacent first cutting line pattern 2 are parallel and complementary in shape, so that a first margin area 4 is left between the fixed block pattern 6 and its adjacent first cutting line pattern 2; the opposite sides of the fixed block pattern 6 and its adjacent second cutting line pattern 3 are parallel, so that a second margin area 5 is left between the fixed block pattern 6 and its adjacent second cutting line pattern 3.

[0083] Several product graphics 1 are evenly arranged and distributed in the product area according to the requirements of 0603 specification capacitors. The product graphics 1 are rectangular, and the spacing between any two adjacent product graphics 1 in the Y-axis direction is equal to b1.

[0084] The method for preparing a capacitor comprises the following steps:

[0085] S1. Prepare the following components in parts by weight: 60 parts of barium titanate ceramic powder, 10 parts of toluene, 10 parts of ethanol, and 12 parts of polyvinyl butyral, mix the components evenly to obtain a ceramic slurry, and cast the ceramic slurry to form a dielectric layer; use a screen printing device to print an electrode slurry on the dielectric layer to obtain a printed sheet; the screen printing device has a capacitor printing plate of this embodiment;

[0086] S2, stacking the printed sheets in a Y-axis staggered manner, so that each two adjacent printed sheets are staggered along the Y-axis direction of the capacitor printed plate according to a length R, the number of stacked layers is 100, and then cutting them vertically and horizontally according to the markings of the margin area and the cutting line to obtain a stacked body;

[0087] S3. After the laminate is sintered, external electrodes are prepared at both ends of the laminate to obtain a capacitor.

[0088] Embodiments 2 to 7

[0089] The difference between Examples 2 to 3 and Example 1 is that the values ​​of a1 and c1 are different. In Example 2, a1 / b1=0.6, c1 / d1=0.2, c1 / d2=0.4; in Example 3, a1 / b1=0.3, c1 / d1=0.3, c1 / d2=0.6.

[0090] The difference between Examples 4 and 5 and Example 1 is that the value of a1 is different. In Example 4, a1 / b1=1.2; in Example 5, a1 / b1=0.1;

[0091] The difference between Examples 6 and 7 and Example 1 is that the value of c1 is different. In Example 6, c1 / d1=0.1, c1 / d2=0.2; in Example 7, c1 / d1=0.4, c1 / d2=0.8.

[0092] Example 8

[0093] The difference between this embodiment and embodiment 1 is that in this embodiment, the shape of the first protrusion is an arch (such as Figure 3 As shown), a1 is the height of the bow, c1 is the chord length of the bow, a1 / b1=0.6, c1 / d1=0.2, c1 / d2=0.4.

[0094] Example 9

[0095] The difference between this embodiment and embodiment 1 is that Figure 4 As shown, in this embodiment, in any two adjacent second cutting line patterns 3, second protrusions 31 are respectively provided on both sides of one of the second cutting line patterns 3, and the two second protrusions 31 are symmetrical with respect to the Y-axis direction of the capacitor printed plate, and second recesses 32 are respectively provided on both sides of the other second cutting line pattern 3, and the two second recesses 32 are symmetrical with respect to the Y-axis direction of the capacitor printed plate, so that the second cutting line pattern 3 provided with the second protrusions 31 and the second cutting line pattern 3 provided with the second recesses 32 are alternately arranged in the X-axis direction of the capacitor printed plate; the second protrusions The second protrusion 31 and the second concave portion 32 are complementary in shape and aligned in the X-axis direction of the capacitor printed plate; the shape of the second protrusion 31 is an isosceles triangle; the size of the second protrusion 31 in the X-axis direction of the capacitor printed plate (i.e., the height of the isosceles triangle) is a2, the size of the second margin area 5 in the X-axis direction of the capacitor printed plate is b2, the size of the second protrusion 31 in the Y-axis direction of the capacitor printed plate (i.e., the length of the base of the isosceles triangle) is c2, and the size of the second cutting line pattern 3 in the Y-axis direction of the capacitor printed plate is d3, a2 / b2=1, c2 / d3=0.5;

[0096] The opposite sides of the fixing block pattern 6 and the adjacent second cutting line pattern 3 are parallel and complementary in shape.

[0097] Example 10

[0098] The difference between this embodiment and embodiment 9 is that Figure 5As shown, in this embodiment, the shape of the second protrusion 31 is an isosceles trapezoid, a2 is the height of the isosceles trapezoid, c2 is the length of the base of the isosceles trapezoid, a2 / b2=0.8, c2 / d3=0.4, and in this embodiment, the first cutting line pattern 2 is not provided with the first protrusion and the first recessed portion, and the first cutting line pattern 2 is a rectangle; in the preparation method of the capacitor of this embodiment, step S2 stacks the printed sheets in an X-axis staggered manner, so that each adjacent two printed sheets are staggered along the X-axis direction of the capacitor printed plate according to a length R, the number of stacked layers is 100, and then vertical and horizontal cutting is performed according to the markings of the margin area and the cutting line to obtain a stacked body.

[0099] Examples 11 to 14

[0100] The difference between Example 11 and Example 10 is that the values ​​of a2 and / or c2 are different; in Example 11, a2 / b2=0.3;

[0101] The difference between Examples 12 to 14 and Example 10 is that the value of c2 is different; in Example 12, c2 / d3=0.1; in Example 13, c2 / d3=0.8; in Example 14, c2 / d3=0.6.

[0102] Comparative Example 1

[0103] The difference between this comparative example and Example 1 is that Figure 6 As shown, in this comparative example, the first cutting line pattern 2 is not provided with the first protruding portion and the first recessed portion, and the first cutting line pattern 2 is a rectangle.

[0104] The capacitor printing plates and preparation methods of the above embodiments and comparative examples were used to prepare capacitors, and the following performance tests were performed:

[0105] (1) Cutting defect rate: The cut laminates were inspected. The number of laminate samples inspected was 1000, and the proportion of laminates cut to the internal electrodes to the total number of laminates was counted (as the cutting defect rate);

[0106] (2) Delamination ratio: The side surface of the capacitor was observed under a microscope. The number of observed capacitor samples was 1,000, and the ratio of capacitors with delamination to the total number of capacitors was calculated as the delamination ratio.

[0107] The performance test results are shown in Table 1 below:

[0108] Table 1

[0109] serial number Delamination ratio / % Cutting defect rate / % Example 1 0.1 0.5 Example 2 0.2 0.3 Example 3 0.4 0.2 Example 4 0.5 1.2 Example 5 1.1 0.2 Example 6 1.2 0.3 Example 7 0.3 1.1 Example 8 0.3 0.3 Example 9 0.1 0.6 Example 10 0.2 0.4 Embodiment 11 0.5 0.2 Example 12 1.0 0.3 Embodiment 13 0.2 1.3 Embodiment 14 0.2 0.3 Comparative Example 1 2.3 0.1

[0110] It can be seen from Table 1 that, in the green sheets prepared in Examples 1 to 13, the delamination phenomenon can be effectively avoided and the cutting defect rate can be reduced by using the printing plate with a specific structure of the present invention for printing.

[0111] It can be seen from Examples 1 to 5 that when a1 / b1 is 0.3 to 1, the provision of the first raised portion and the first recessed portion can more effectively reduce the gaps in the printed sheet laminate structure while ensuring the first cutting line identification function, thereby effectively improving the interlayer bonding strength of the printed sheet laminate structure; when a1 / b1>1, it is easy to make the cutting line difficult to identify during subsequent cutting, thereby increasing the cutting defect rate; when a1 / b1<0.3, the provision of the first raised portion and the second recessed portion has no obvious effect on improving the interlayer bonding strength of the printed sheet laminate structure, thereby increasing the delamination ratio of the capacitor product.

[0112] It can be seen from Examples 1 and 6 to 7 that when c1 / d1 is 0.2 to 0.3 and c1 / d2 is 0.4 to 0.6, the setting of the first raised portion and the first recessed portion can not only ensure that the first margin area can normally play the role of assisting in identifying the cutting position, but also effectively improve the interlayer bonding force of the printed sheet laminate structure. When c1 / d1 < 0.2 and c1 / d2 < 0.4, the setting of the first raised portion and the first recessed portion has no obvious effect on improving the interlayer bonding force of the printed sheet laminate structure, which increases the delamination ratio of the capacitor product; when c1 / d1 > 0.3 and c1 / d2 > 0.6, the setting of the first raised portion and the first recessed portion easily makes it difficult to identify the first cutting line during subsequent cutting, affecting the cutting effect.

[0113] By comparing Example 10 with Examples 12 to 14, it can be seen that controlling c2 / d3 within the range of 0.4 to 0.6 can not only ensure that the second margin area can normally play the role of assisting in identifying the cutting position, but also more effectively improve the interlayer bonding strength of the printed sheet laminate structure.

[0114] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A capacitor printed plate, characterized in that: The invention comprises a product area, a cutting line area and a fixed area, wherein the cutting line area and the fixed area are arranged around the product area, a plurality of product patterns are arranged in the product area, a fixed block pattern is arranged in the fixed area, the cutting line area comprises a plurality of first cutting line patterns and a plurality of second cutting line patterns, the plurality of first cutting line patterns are arranged along the Y-axis direction of the capacitor printed plate, a first margin area is left between any two adjacent first cutting line patterns, a plurality of second cutting line patterns are arranged along the X-axis direction of the capacitor printed plate, a second margin area is left between any two second cutting line patterns, and at least one of (I) to (II) is satisfied: (I) Among the facing sides of any two adjacent first cutting line patterns, one facing side is provided with a first protruding portion, and the other facing side is provided with a first recessed portion; (II) Among the facing sides of any two adjacent second cutting line patterns, one facing side is provided with a second protruding portion, and the other facing side is provided with a second recessed portion.

2. The capacitor printed plate according to claim 1, characterized in that: In any two adjacent first cutting line patterns, the size of the first protrusion in the Y-axis direction of the capacitor printed plate is a1, and the size of the first margin area in the Y-axis direction of the capacitor printed plate is b1, 0<a1 / b1≤1.2; And / or, in any two adjacent second cutting line patterns, the size of the second protrusion in the X-axis direction of the capacitor printed plate is a2, the size of the second margin area in the X-axis direction of the capacitor printed plate is b2, 0<a2 / b2≤1.

2.

3. The capacitor printed plate according to claim 1, characterized in that: The size of the first protrusion in the X-axis direction of the capacitor printed plate is c1, and in any two adjacent first cutting line patterns, the size of one first cutting line pattern in the X-axis direction of the capacitor printed plate is d1, and the size of the other first cutting line pattern in the X-axis direction of the capacitor printed plate is d2, 0.1≤c1 / d1≤0.4, 0.2≤c1 / d2≤0.8; And / or, the size of the second protrusion in the Y-axis direction of the capacitor printed plate is c2, and the sizes of any two adjacent second cutting line patterns in the Y-axis direction of the capacitor printed plate are the same, both are d3, 0.1≤c2 / d3≤0.

8.

4. The capacitor printed plate according to claim 1, wherein: In any two adjacent first cutting line patterns, first convex portions are respectively provided on both sides of one of the first cutting line patterns, and the two first convex portions are symmetrical with respect to the X-axis direction of the capacitor printed plate, and first concave portions are respectively provided on both sides of the other first cutting line pattern, and the two first concave portions are symmetrical with respect to the X-axis direction of the capacitor printed plate, so that the first cutting line patterns provided with the first convex portions and the first cutting line patterns provided with the first concave portions are alternately arranged in the Y-axis direction of the capacitor printed plate; And / or, in any two adjacent second cutting line graphics, second protrusions are respectively provided on both sides of one of the second cutting line graphics, and the two second protrusions are symmetrical with respect to the Y-axis direction of the capacitor printed plate, and second recesses are respectively provided on both sides of the other second cutting line graphics, and the two second recesses are symmetrical with respect to the Y-axis direction of the capacitor printed plate, so that the second cutting line graphics provided with second protrusions and the second cutting line graphics provided with second recesses are alternately arranged in the X-axis direction of the capacitor printed plate.

5. The capacitor printed plate according to claim 1, wherein: The first protrusion and the first recess are complementary in shape; And / or, the second protrusion and the second recess are complementary in shape.

6. The capacitor printed plate according to claim 1, wherein: The shapes of the opposite sides of the fixing block pattern and its adjacent first cutting line pattern are complementary; And / or, the shapes of opposite sides of the fixing block pattern and its adjacent second cutting line pattern are complementary.

7. The capacitor printed plate according to claim 6, wherein: A first margin area is left between the fixed block pattern and the first cutting line pattern adjacent to it; And / or, a second margin area is left between the fixed block pattern and its adjacent second cutting line pattern.

8. A method for preparing a capacitor, characterized in that: The steps include: S1. Prepare a dielectric layer, use a printing device to print electrode slurry on the dielectric layer, and obtain a printed sheet by peeling; the printing device has a capacitor printing plate as described in the first aspect; S2, laminating the printed sheets obtained in step S1 and cutting them to obtain a laminate; S3. Sintering the laminate obtained in step S2 to obtain a capacitor.

9. The method for preparing a capacitor according to claim 8, characterized in that: The printing device is any one of a gravure printing device, a relief printing device, a flat printing device and a screen printing device.

10. The method for preparing a capacitor according to claim 8, wherein: Step S2 specifically includes: stacking the printed sheets obtained in step S1 in a predetermined manner to a predetermined number of layers, and then cutting them vertically and horizontally according to the markings of the margin areas and cutting lines to obtain a laminated body.

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