Screen printing plate for producing multilayer ceramic dielectric capacitor
By designing a screen for the production of multilayer ceramic capacitors, the problems of cutting accuracy and yield caused by uneven stress were solved, thereby improving the precision of green blank cutting and the performance of the products.
Patent Information
- Application Number
- CN202520143268.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-21
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2035-01-21
AI Technical Summary
The existing screen printing plates exhibit uneven stress during the lamination process after printing, which affects the cutting accuracy of the green blank and the pass rate of the cut pieces.
Design a screen for the production of multilayer ceramic capacitors, including electrode patterns, partition spaces, cutting spaces, and spacing patterns. By leaving blank spaces at the cutting spaces, the generation of height differences is avoided, ensuring the precise positioning of the electrode patterns and the uniformity of stress.
It improves the cutting accuracy of green blanks and the pass rate of cut blocks, avoids deformation of the cutting space, and ensures the stability and reliability of product performance.
Smart Images
Figure CN223559263U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to electronic component technical field, concretely relates to a screen for multilayer ceramic capacitor production. BACKGROUND
[0002] The manufacturing of multilayer ceramic capacitors (MLCC) is a highly precise and complex process that utilizes screen printing technology to precisely control the layout of electrodes. This process begins with batching and slurry preparation, where ceramic powder (such as barium titanate and its derivatives) is mixed with a binder and solvent, homogenized through ball milling, forming a ceramic slurry. Subsequently, the slurry is coated onto a PET film through a flow casting process, forming a ceramic film sheet, and most of the solvent is removed through hot air drying. Screen printing is one of the key steps, which ensures that the internal electrodes are precisely printed on the dried ceramic film sheet according to the designed pattern. These film sheets with internal electrodes are stacked in a specific staggered manner, a process called lamination, with the purpose of forming a structure in which multiple capacitor units are connected in parallel at the microscopic level. During lamination, ceramic protective sheets are added on top and bottom to enhance the mechanical strength and insulation performance of the final product. The "bar" after lamination is subjected to lamination, and through isostatic pressing technology, it is pressurized in a vacuum-sealed bag, so that each layer is tightly combined. After that, this preform is cut into independent capacitor green bodies, each of which contains multiple potential capacitor units. In the degassing stage, organic matter is removed to prevent delamination or cracking due to rapid evaporation of organic matter during sintering, ensuring the integrity of the ceramic structure. Then, the sintering process is carried out at high temperature, which makes the ceramic reach the final physical and electrical properties, forming a high-density, high-dielectric-constant ceramic body. Finally, through the burn-out process, these external electrodes are fixed to ensure firm bonding with the ceramic body, and thus a complete multilayer ceramic capacitor is born.
[0003] Among them, the tool used in the screen printing process is a screen. In the design of the screen, the internal electrode parameter design is first needed. At the same time, the design of the cutting space is also needed, and the role of the cutting space is to guide the position of the cutting knife during the cutting process. In the printing process, the screen is used to print the internal electrode pattern and the cutting space at the same time, and the space pattern between the cutting spaces is not printed with metal internal electrodes. In the subsequent lamination process, due to the height difference between the position of the printed internal electrode pattern and the position of the space pattern between the cutting spaces, this height difference will cause uneven stress during the lamination step, which will result in deformation of the printed cutting space, thereby affecting the green body cutting accuracy and the cutting yield. SUMMARY
[0004] The utility model wants to solve the technical problem that the current screen plate will appear uneven stress condition when entering the stacking step after printing, influence green body cutting precision and the qualified rate of cutting block, and the purpose is to provide a screen plate for multilayer porcelain dielectric capacitor production, improve green body cutting precision and the qualified rate of cutting block.
[0005] The utility model discloses a technical scheme realizes:
[0006] A screen plate for multilayer porcelain dielectric capacitor production, including
[0007] Electrode pattern, there are multiple, multiple electrode patterns are arranged in array, and electrode pattern is used for printing electrode paste;
[0008] Separation space, there are multiple, multiple separation spaces are separated between adjacent electrode patterns;
[0009] Cutting space, there are multiple, multiple cutting spaces are arranged around electrode pattern, and be used for accurately positioning electrode pattern;
[0010] Interval pattern, there are multiple, multiple interval patterns are located between adjacent cutting spaces, and with electrode pattern adjacent, be used for printing electrode paste when making electrode paste penetrate and print on porcelain film.
[0011] As a possible design, the above-mentioned electrode pattern includes inner electrode pattern and outer electrode pattern,
[0012] There are multiple inner electrode patterns, and multiple inner electrode patterns are arranged in array, and are used for printing electrode paste, and separation space is located between two adjacent inner electrode patterns;
[0013] There are multiple outer electrode patterns, and multiple outer electrode patterns are symmetrically distributed on the left and right sides of inner electrode pattern, and separation space is located between two adjacent outer electrode patterns.
[0014] As a possible design, the above-mentioned separation space includes longitudinal separation space and transverse separation space,
[0015] There are multiple longitudinal separation spaces, and are evenly distributed between multiple adjacent electrode patterns;
[0016] There are multiple transverse separation spaces, and are evenly distributed between multiple adjacent electrode patterns.
[0017] As a possible design, the width of the above-mentioned longitudinal separation space is 0.4-1.3mm;The width of transverse separation space is 0.4-1.5mm.
[0018] As a possible design, the width of the above-mentioned longitudinal separation space is 1mm;The width of transverse separation space is 1.45mm.
[0019] As a possible design, the cutting spaces include longitudinal cutting spaces and transverse cutting spaces,
[0020] The longitudinal cutting spaces are equidistantly distributed on the left and right sides of the electrode pattern, and interval patterns are arranged between adjacent longitudinal cutting spaces.
[0021] The transverse cutting spaces are equidistantly distributed on the upper and lower sides of the electrode pattern, and interval patterns are arranged between adjacent transverse cutting spaces.
[0022] As a possible design, the middle of the transverse cutting spaces in the group is opposite to the middle of the transverse separation space.
[0023] Or, the transverse cutting spaces in the group are opposite to the middle of the electrode pattern and the middle of the transverse separation space, respectively.
[0024] As a possible design, the longitudinal cutting spaces are opposite to the middle of the longitudinal separation space.
[0025] As a possible design, the longitudinal cutting spaces and the transverse cutting spaces have a width of 0.05-0.15mm.
[0026] As a possible design, the longitudinal cutting spaces and the transverse cutting spaces have a width of 0.1mm.
[0027] Compared with the prior art, the present application has the following advantages and beneficial effects:
[0028] In the present application, the electrode pattern and the interval pattern are both printed with electrodes, and no electrode is printed in the separation space and the cutting space. The electrode pattern is accurately positioned by leaving blank in the cutting space position. In actual production, the height of the electrode pattern and the interval pattern is the same after each printing, so that the height difference is avoided, the uniformity of stress is improved in the lamination step, the cutting space deformation is avoided, and the green cutting precision and the qualified rate of cutting are improved. In addition, although the cutting space is not printed, the width of the cutting space is very narrow, so it will not affect the stress uniformity of the lamination step. On the basis of ensuring accurate positioning of the electrode pattern, the performance of the product is improved. BRIEF DESCRIPTION OF DRAWINGS
[0029] The drawings described herein are used to provide a further understanding of the embodiments of the present application, constitute a part of the present application, and do not constitute a limitation on the embodiments of the present application. In the drawings:
[0030] Figure 1 A structure schematic view of a screen used for multilayer porcelain dielectric capacitor production of the utility model;
[0031] Figure 2 A partial enlarged view of A part of the screen used for multilayer porcelain dielectric capacitor production of the utility model;
[0032] Figure 3 A partial enlarged view of B part of the screen used for multilayer porcelain dielectric capacitor production of the utility model;
[0033] Figure 4 A structure schematic view two of the screen used for multilayer porcelain dielectric capacitor production of the utility model;
[0034] Figure 5 A partial enlarged view of C part of the screen used for multilayer porcelain dielectric capacitor production of the utility model;
[0035] Figure 6 A partial enlarged view of D part of the screen used for multilayer porcelain dielectric capacitor production of the utility model.
[0036] Markings in the drawings and corresponding component names:
[0037] 1 - electrode pattern; 11 - inner electrode pattern; 12 - outer electrode pattern; 2 - separation space; 21 - longitudinal separation space; 22 - transverse separation space; 3 - cutting space; 31 - longitudinal cutting space; 32 - transverse cutting space; 4 - interval pattern. DETAILED DESCRIPTION
[0038] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the utility model is further explained in detail below by combining with examples and drawings, and the illustrative embodiment and its explanation of the utility model are only used for explaining the utility model, and not as the limitation of the utility model.
[0039] It should be noted that when a component is referred to as "fixed to" or "set to" another component, it can be directly on another component or indirectly on the other component. When a component is referred to as "connected to" another component, it can be directly or indirectly connected to the other component.
[0040] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.
[0041] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.
[0042] In the description of the present application, it should be noted that, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0043] The embodiment provides a screen for producing a multi-layer ceramic dielectric capacitor, such as Figures 1-6The electrode pattern 1, the separation space 2, the cutting space 3 and the interval pattern 4 are shown. The electrode pattern 1 is in a plurality, and the plurality of electrode patterns 1 are arranged in an array, and the electrode pattern 1 is used for printing electrode paste, and after a plurality of layers are laminated, the inner electrode of each layer can be correctly aligned with the adjacent layer to form a parallel structure of a plurality of simple capacitors, and the layout of the inner electrode is crucial to the capacitance value, distribution and overall performance of the MLCC, which determines the efficiency of charge storage and the electrical characteristics of the capacitor; the separation space 2 is in a plurality, and the shape is a long strip, and the plurality of separation spaces 2 are separated between adjacent electrode patterns 1, which can ensure the electrical isolation between the electrodes, and these separation areas prevent short circuit between adjacent electrode layers during the printing process, and ensure that the electrodes of each layer can work independently to form a plurality of parallel capacitor units, and by accurately controlling the interval, the high reliability and stability of the capacitor can be maintained, and the performance degradation or failure caused by improper contact between the electrodes during the lamination and sintering process is avoided, in addition, in actual production, the electrode paste cannot penetrate the separation space 2 and cannot be printed on the ceramic film; the cutting space 3 is in a plurality, and the plurality of cutting spaces 3 are arranged around the electrode pattern, and the cutting space 3 of the utility model does not print electrode paste, and its main function is a positioning mark in the cutting process, and these cutting spaces 3 help to cut the green body product with consistent size, which can realize the accurate alignment and repeatability of the electrode pattern 1, prevent short circuit caused by cutting deviation, and in addition, in actual production, the electrode paste cannot be printed on the ceramic film at the position of the cutting space 3; the interval pattern 4 is in a plurality, and the plurality of interval patterns 4 are located between adjacent cutting spaces 3 and adjacent to the electrode pattern, and is used for printing electrode paste, so that after each layer of electrode paste is printed, the cutting space 3 and the electrode pattern are located at the same height, so as to improve the uniformity of stress during the lamination step, avoid the deformation of the cutting space, improve the green body cutting precision and the qualification rate of the cutting block, and in addition, in actual production, the interval pattern position will print the inner electrode.
[0044] In some embodiments, with reference to Figures 1-3 The above-mentioned electrode pattern 1 includes an inner electrode pattern 11 and an outer electrode pattern 12. The inner electrode pattern 11 is in a plurality, and the plurality of inner electrode patterns 11 are arranged in an array, and is used for printing electrode paste, and the separation space 2 is located between adjacent two inner electrode patterns 11, and the length of the inner electrode pattern 11 is the same as that of the outer electrode pattern 12, but the width of the inner electrode pattern 11 is greater than that of the outer electrode pattern 12, which can ensure the integrity of the electrode pattern after the misaligned lamination; the outer electrode pattern 12 is in a plurality, and the plurality of outer electrode patterns 12 are symmetrically distributed on the left and right sides of the inner electrode pattern 11, and the separation space 2 is located between adjacent two outer electrode patterns 12.
[0045] With reference to Figures 4-6The electrode pattern 1 comprises only the inner electrode pattern 11. The inner electrode patterns 11 are arranged in an array, and the printing electrode paste is printed in the inner electrode patterns 11. The spacing 2 is arranged between two adjacent inner electrode patterns 11.
[0046] In some embodiments, referring to Figures 1-6 The spacing 2 comprises longitudinal spacing 21 and transverse spacing 22. The longitudinal spacing 21 is arranged between two adjacent electrode patterns 1. The transverse spacing 22 is arranged between two adjacent electrode patterns 1.
[0047] In some embodiments, referring to Figures 1-3 The width of the longitudinal spacing 21 is 0.4-1.3 mm. The width of the transverse spacing 22 is 0.4-1.5 mm, which is used for electrical isolation of the electrode pattern.
[0048] In some embodiments, referring to Figures 1-3 The width of the longitudinal spacing 21 is 1 mm. The width of the transverse spacing 22 is 1.45 mm.
[0049] In some embodiments, referring to Figures 1-3 The spacing 3 comprises longitudinal spacing 31 and transverse spacing 32. The longitudinal spacing 31 is arranged on the left and right sides of the electrode pattern 1. The transverse spacing 32 is arranged on the upper and lower sides of the electrode pattern 1. The longitudinal spacing 31 is made of a material that is not transparent to the printing paste, so that the printing paste cannot pass through the longitudinal spacing 31. The transverse spacing 32 is made of a material that is not transparent to the printing paste, so that the printing paste cannot pass through the transverse spacing 32.
[0050] In some embodiments, referring to Figures 4-6 The transverse spacing 32 is arranged between the electrode pattern 1 and the transverse spacing 22.
[0051] In some embodiments, referring to Figures 1-3 The longitudinal spacing 31 is arranged between the electrode pattern 1 and the longitudinal spacing 21.
[0052] In some embodiments, referring toFigures 1-3 The longitudinal cutting space 31 and the transverse cutting space 32 have a width of 0.05-0.15mm.
[0053] In some embodiments, with reference to Figures 1-3 The longitudinal cutting space 31 and the transverse cutting space 32 have a width of 0.1mm.
[0054] The above detailed description of the specific embodiments, the purpose, technical solutions and beneficial effects of the present application are further described in detail, and it should be understood that the above description is only a specific embodiment of the present application and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.
Claims
1. A screen for the production of multilayer ceramic dielectric capacitors, characterized in that, include Electrode patterns (1) are multiple in number and arranged in an array. The electrode patterns (1) are used to print electrode paste. There are multiple partition spaces (2), and multiple partition spaces (2) are separated between adjacent electrode patterns (1); There are multiple cutting spaces (3) arranged around the electrode pattern for precise positioning of the electrode pattern; There are multiple spacer patterns (4), which are located between adjacent cutting spaces (3) and adjacent to the electrode patterns. They are used to allow the electrode paste to pass through and be printed onto the ceramic film when printing electrode paste.
2. The screen printing plate for producing a multi-layer ceramic dielectric capacitor according to claim 1, wherein The electrode pattern (1) includes an inner electrode pattern (11) and an outer electrode pattern (12). There are multiple inner electrode patterns (11), and the multiple inner electrode patterns (11) are arranged in an array for printing electrode paste, and the separation space (2) is located between two adjacent inner electrode patterns (11). There are multiple outer electrode patterns (12), which are symmetrically distributed on the left and right sides of the inner electrode pattern (11), and the separation space (2) is located between two adjacent outer electrode patterns (12).
3. The screen printing plate for producing a multi-layer ceramic dielectric capacitor according to claim 1, wherein The partition space (2) includes a longitudinal partition space (21) and a transverse partition space (22). There are multiple longitudinal partition spaces (21), which are evenly distributed between multiple adjacent electrode patterns (1); There are multiple transverse partition spaces (22), which are evenly distributed between multiple adjacent electrode patterns (1).
4. The screen printing plate for producing a multi-layer ceramic dielectric capacitor according to claim 3, wherein The width of the longitudinal partition space (21) is 0.4-1.3 mm; the width of the transverse partition space (22) is 0.4-1.5 mm.
5. The screen printing plate for producing a multi-layer ceramic dielectric capacitor according to claim 4, wherein The width of the longitudinal partition space (21) is 1 mm; the width of the transverse partition space (22) is 1.45 mm.
6. The screen printing plate for producing a multi-layer ceramic dielectric capacitor according to claim 3, wherein The cutting space (3) includes a longitudinal cutting space (31) and a transverse cutting space (32). There are multiple longitudinal cutting spaces (31), and the multiple longitudinal cutting spaces (31) are evenly distributed on the left and right sides of the electrode pattern (1). An interval pattern (4) is set between adjacent longitudinal cutting spaces (31). The longitudinal cutting spaces (31) are made of a material that does not allow printing paste to pass through, so that the electrode paste cannot pass through during printing. There are multiple transverse cutting spaces (32), and the multiple transverse cutting spaces (32) are grouped in pairs. The multiple groups of transverse cutting spaces (32) are distributed at equal intervals on the upper and lower sides of the electrode pattern (1). An interval pattern (4) is set between adjacent transverse cutting spaces (32). The transverse cutting spaces (32) are made of a material that does not allow printing paste to pass through, so that the electrode paste cannot pass through during printing.
7. The screen printing plate for producing a multi-layer ceramic dielectric capacitor according to claim 6, wherein The middle of one set of transverse cutting spaces (32) is opposite to the middle of the transverse partition space (22); Alternatively, a set of the transverse cutting spaces (32) are respectively opposite to the middle of the electrode pattern (1) and the middle of the transverse dividing space (22).
8. The screen printing plate for producing a multi-layer ceramic dielectric capacitor according to claim 6, wherein The longitudinal cutting space (31) is opposite to the longitudinal partition space (21) in the middle.
9. The screen printing plate for producing a multi-layer ceramic dielectric capacitor according to claim 6, wherein The width of the longitudinal cutting space (31) and the transverse cutting space (32) is 0.05-0.15mm.
10. The screen printing plate for producing a multi-layer ceramic dielectric capacitor according to claim 9, wherein The longitudinal cutting space (31) and the transverse cutting space (32) have a width of 0.1 mm.