Protection device and screen printing plate system
By applying protective adhesive to the screen and designing a protective device with matching grooves at its edges and corners, the problem of screen corner wear is solved, achieving effective protection and extended lifespan for the screen.
Patent Information
- Application Number
- CN202422662653.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-01
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-11-01
AI Technical Summary
Existing protective tapes cannot effectively protect the vertices of the screen's radius corners, leading to screen wear and slurry leakage, and affecting its service life.
Design a protective device that uses protective adhesive to surround the corners of the stencil graphic border, and sets grooves on the protective adhesive that match the corners of the stencil to avoid direct contact. The protective adhesive is spaced apart from the edge of the silicon wafer to prevent wear.
It effectively protects the rounded corners of the screen, extends the screen's lifespan, and prevents ink leakage, while not affecting printing results and saving on protective adhesive usage.
Smart Images
Figure CN223545974U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of solar cell printing, and in particular to a protective device and a printing screen system. Background Technology
[0002] In solar cell printing production, due to long-term printing, the radius (R) corners or edges of the silicon wafer are prone to wear and tear on the stencil's radius (R), causing ink leakage and affecting the stencil's lifespan. To improve this, the existing method is to use common transparent tape to adhere to the stencil's edges or radius (R). During printing, the silicon wafer edge contacts the tape, preventing direct contact between the silicon wafer and the stencil, thus extending the stencil's lifespan. However, because the silicon wafer's radius (R) has a certain curvature, while the tape edge is straight, the tape cannot protect the apex of the stencil's radius (R). The apex of the stencil's radius (R) will still wear down, resulting in ink leakage, thus offering limited protection. Utility Model Content
[0003] To address the technical problem that the aforementioned protective tape cannot protect the vertex of the rounded corners of the screen printing plate, thus affecting the plate's lifespan, this invention provides a protective device and a printing screen system.
[0004] To achieve the above objectives, this utility model provides a protective device, which is disposed on a screen. A screen graphic border is formed in the middle of the screen, and the screen graphic border includes straight edges and corners. The protective device includes a protective adhesive, which is disposed on the screen and surrounds the corners of the screen graphic border.
[0005] Furthermore, the protective adhesive includes grooves that surround the corners of the screen graphic border.
[0006] Furthermore, the shape of the groove is adapted to the shape of the corner of the screen graphic border.
[0007] Furthermore, the groove includes an arc surface and an extension surface, the extension surface is disposed at both ends of the arc surface, the shape of the arc surface is adapted to the shape of the corner of the screen graphic border, and the extension surface extends to the straight edge of the screen graphic border.
[0008] Furthermore, there is a gap between the protective adhesive and the border of the screen graphic.
[0009] Furthermore, a silicon wafer is disposed on one side of the screen printing pattern border where the protective adhesive is applied, and the edge of the silicon wafer covers the screen printing pattern border and extends to the protective adhesive.
[0010] Furthermore, the height of the protective adhesive is higher than the border of the screen pattern.
[0011] Furthermore, the edge of the protective adhesive near the frame of the stencil pattern is the inner edge, which is located between the edge of the silicon wafer and the middle of the frame of the stencil pattern.
[0012] Furthermore, multiple protective adhesives are provided, with one protective adhesive provided at each corner of the screen graphic border.
[0013] Another objective of this embodiment is to provide a printing screen system that is equipped with the aforementioned protective device.
[0014] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art:
[0015] (1) Use protective adhesive to surround the edges and corners of the stencil pattern to prevent the edges and corners of the silicon wafer from directly contacting the edges and corners of the stencil pattern, thereby protecting the edges and corners of the stencil and preventing slurry leakage at the vertices of the edges and corners of the stencil.
[0016] (2) A groove is made in the protective adhesive. The curvature of the groove is the same as the curvature of the corner of the screen graphic border. The two sides of the groove are bent and extended to the straight edge of the screen graphic border, so that the shape of the groove of the protective adhesive fits the shape of the corner of the screen graphic border, which can achieve a better protective effect.
[0017] (3) The silicon wafer covers the outline of the screen printing pattern and extends to the protective adhesive. The edge of the protective adhesive is set in the middle of the edge of the silicon wafer and the outline of the screen printing pattern. While playing a protective role, it avoids affecting the screen printing effect. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a schematic diagram of the attachment position of the protective device of this utility model;
[0020] Figure 2 This is a schematic diagram of the protective device of this utility model;
[0021] Figure 3 This is a schematic diagram showing the installation positions of the protective device, screen, and silicon wafer of this utility model.
[0022] Explanation of the markings on the attached drawings: Screen pattern border -1; Straight edge -11; Corner -12; Silicon wafer -2; Protective adhesive -3; Groove -31; Curved surface -31-1; Extension surface -31-2. Detailed Implementation
[0023] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.
[0024] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
[0025] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.
[0026] This utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, deviating from the general scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.
[0027] Furthermore, in the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used solely for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," or "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0028] Unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" in this utility model should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integrated connections; similarly, they can refer to mechanical connections, electrical connections, or direct connections, or indirect connections through an intermediate medium, or internal connections between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.
[0029] Example 1
[0030] Reference Figures 1-3 This invention provides a protective device that is installed on a screen printing plate. A screen printing graphic border 1 is formed in the center of the screen printing plate. The screen printing graphic border 1 is used to ensure the accurate positioning of the printed image on the screen printing plate and to protect the printed image. The screen printing graphic border 1 includes straight edges 11 and corners 12. The straight edges 11 of the screen printing graphic border 1 are multiple straight lines, and the screen printing graphic border 1 is located at the intersection of two straight lines. The multiple straight edges 11 and corners 12 are connected to form a closed screen printing graphic border 1. The protective device includes protective adhesive 3, which is applied to the screen printing plate and distributed along the edges of the screen printing graphic border 1. The protective adhesive 3 surrounds the corners 12 of the screen printing graphic border 1, protecting the screen printing plate. The corners 12 of the graphic border 1 are protected. In practical applications, the corners 12 of the screen graphic border 1 are rounded (R-angles). The protective adhesive 3 is applied to the screen using PI tape, with the PI tape placed on the rounded corners of the screen graphic border 1. Existing protective tape generally has straight edges, while the corners 12 of the screen graphic border 1 have a certain curvature. When applying the tape, the two vertices of the rounded corners of the screen graphic border 1 are far from the protective tape, which cannot provide a good protective effect. In addition, if the protective tape is applied too close, it will also affect the printing quality. In this embodiment, the protective adhesive 3 surrounds the rounded corners of the screen graphic border 1, preventing wear at the vertices of the screen graphic border 1, achieving a protective effect, and improving the life of the screen.
[0031] In one embodiment, refer to Figure 2 The protective adhesive 3 includes a groove 31, which surrounds the corner 12 of the screen graphic border 1. By using a protective adhesive 3 to surround the corner 12 of the screen graphic border 1, material is saved. In the embodiment, the groove 31 can be obtained by cutting from a traditional PI tape. The side of the protective adhesive 3 away from the screen graphic border 1 is the outer side of the protective adhesive 3. After the groove 31 is cut, a certain width distance is still maintained from the outer edge of the protective adhesive 3 to the bottom of the groove 31 to avoid affecting the protective effect.
[0032] In one embodiment, the shape of the groove 31 is adapted to the shape of the corner 12 of the screen graphic border 1. In this embodiment, referring to... Figure 1 The corner 12 of the screen graphic border 1 is an R-angle, and it can be seen that the R-angle is composed of three arcs or one arc with two bends. The groove 31 fits the shape of the corner 12 of the screen graphic border 1, that is, the groove 31 and each arc of the corner 12 of the screen graphic border 1 are the same, so that the same protective effect can be obtained at any position of the corner 12 of the screen graphic border 1, avoiding local wear.
[0033] In one embodiment, the groove 31 includes an arc surface 31-1 and an extension surface 31-2. The extension surface 31-2 is disposed at both ends of the arc surface 31-1. The shape of the arc surface 31-1 is adapted to the shape of the corner 12 of the screen graphic border 1. The extension surface 31-2 extends toward the straight edge 11 of the screen graphic border 1. The groove 31 not only protects the corner 12 of the screen graphic border 1, but also protects the straight edge 11 on both sides of the corner 12. When the corner 12 of the screen graphic border 1 is an R-angle, the point where the R-angle meets the straight edge 11 of the screen graphic border 1 is two vertices. When the two sides of the groove 31 bend and extend toward the straight edge 11 of the screen graphic border 1, the vertex position is placed inside the groove 31, thereby protecting the vertex position of the R-angle and preventing leakage at the vertex position.
[0034] As a preferred embodiment, the distance from the arc surface 31-1 of the groove 31 to the corner 12 of the screen graphic border 1 is the same as the distance from the extension surface 31-2 of the groove 31 to the straight edge 11 of the screen graphic border 1. This further ensures the adhesion between the protective adhesive 3 and the corner 12 of the screen graphic border 1. After the protective adhesive 3 is pasted on the screen, the corner 12 and straight edge 11 of the screen graphic border 1 surrounded by the protective adhesive 3 can receive the same protection, further avoiding local wear and leakage problems.
[0035] In one embodiment, there is a gap between the protective adhesive 3 and the screen graphic border 1 to prevent the printing effect from being affected by the protective adhesive 3 being too close to the screen graphic border 1.
[0036] In one embodiment, a silicon wafer 2 is disposed on one side of the screen printing frame 1 where a protective adhesive 3 is provided. The silicon wafer 2 is disposed above or below the screen printing frame 1. The image is printed onto the silicon wafer 2 through the screen printing frame 1, and the edge of the silicon wafer 2 covers the screen printing frame 1 and extends to the protective adhesive 3, so that the protective adhesive 3 is disposed between the screen printing frame 1 and the silicon wafer 2. Preferably, the height of the protective adhesive 3 is higher than that of the screen printing frame 1, separating the screen and the silicon wafer 2. During printing, the edge of the silicon wafer 2 contacts the protective adhesive 3 but does not directly contact the screen, thereby extending the life of the screen.
[0037] In one embodiment, the edge of the protective adhesive 3 near the screen pattern border 1 is the inner edge. The inner edge is located between the edge of the silicon wafer 2 and the middle of the screen pattern border 1. While protecting the corners 12 of the screen pattern border 1, it also ensures the printing effect. In actual application, the distance between the edge of the screen pattern border 1 and the edge of the silicon wafer 2 is set to X mm. The distance between the edge of the protective adhesive 3 and the edge of the screen pattern border 1 is set between 0.4X and 0.6X mm to avoid affecting the printing effect if the protective adhesive 3 is set too close, or affecting the protection effect if the protective adhesive 3 is set too far.
[0038] In one embodiment, multiple protective adhesives 3 are provided, with one protective adhesive 3 provided at each corner 12 of the screen pattern border 1. Each protective adhesive 3 protects one corner 12 of the screen pattern border 1. The protective adhesive 3 provided at the corner 12 can separate the silicon wafer 2 from the screen. While protecting the corner 12 of the screen pattern border 1, it is not necessary to provide the protective adhesive 3 around the entire screen pattern border 1, thus saving the use of protective adhesive 3 and saving costs.
[0039] The working principle of this embodiment is as follows: First, cut four grooves 31 on the protective adhesive 3 according to the R-corners of the screen graphic border 1. After cutting, paste the protective adhesive 3 onto the screen and set it at the four R-corners of the screen graphic border 1. The grooves 31 of the protective adhesive 3 are attached along the R-corners of the screen graphic border 1, and the edge of the groove 31 on the protective adhesive 3 is 0.5mm away from the R-corner of the screen graphic border 1. Figure 3 As can be seen, the R-corner of the screen printing graphic border 1 is an arc with two bending points. The bottom surface of the groove 31 is an arc with the same angle as the arc on the R-corner. The two sides of the groove 31 are bent and closely attached to the straight edge 11 of the screen printing graphic border 1. The protective glue 3 surrounds the arc and the two bending points of the R-corner, thereby protecting the two vertex positions of the R-corner of the screen printing graphic border 1 and preventing the two vertex positions from contacting and wearing with the silicon wafer 2 during the printing process, thus improving the service life of the screen.
[0040] Example 2
[0041] Unlike the above embodiments, this embodiment provides a printing screen system in which the above-mentioned protective device is affixed to the screen. A screen graphic border 1 is set in the middle of the screen. The protective device includes multiple protective adhesives 3, which are affixed to and surround the corners 12 of the screen graphic border 1, protecting the corners 12 of the screen graphic border 1, separating the screen from the silicon wafer 2, and preventing ink leakage at the corners 12 of the screen graphic border 1 due to wear, thereby improving the service life of the printing screen.
[0042] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.
Claims
1. A protective device, wherein the protective device is disposed on a screen, the screen having a screen graphic border (1) in the middle, the screen graphic border (1) comprising straight edges (11) and corners (12), characterized in that, The protective device includes a protective adhesive (3), which is applied to the screen and surrounds the corners (12) of the screen graphic border (1).
2. The protection device according to claim 1, characterized in that, The protective adhesive (3) includes a groove (31) that surrounds the corner (12) of the screen graphic border (1).
3. The protection device according to claim 2, characterized in that, The shape of the groove (31) is adapted to the shape of the corner (12) of the screen graphic border (1).
4. The protection device according to claim 2, characterized in that, The groove (31) includes an arc surface (31-1) and an extension surface (31-2). The extension surface (31-2) is disposed at both ends of the arc surface (31-1). The shape of the arc surface (31-1) is adapted to the shape of the corner (12) of the screen graphic border (1). The extension surface (31-2) extends to the straight edge (11) of the screen graphic border (1).
5. The protection device according to claim 1, characterized in that, There is a gap between the protective adhesive (3) and the border of the screen graphic (1).
6. The protective device according to any one of claims 1-5, characterized in that, A silicon wafer (2) is provided on one side of the screen pattern border (1) where the protective adhesive (3) is applied. The edge of the silicon wafer (2) covers the screen pattern border (1) and extends to the protective adhesive (3).
7. The protective device according to any one of claims 1-5, characterized in that, The height of the protective adhesive (3) is higher than the border (1) of the screen graphic.
8. The protection device according to claim 6, characterized in that, The inner edge of the protective adhesive (3) is located on the side of the stencil border (1) close to the edge of the stencil pattern. The inner edge is located at the edge of the silicon wafer (2) and the middle of the stencil border (1).
9. The protective device according to any one of claims 1-5, characterized in that, Multiple protective adhesives (3) are provided, and one protective adhesive (3) is provided at each corner (12) of each screen graphic border (1).
10. A printing screen system, characterized in that, Includes the protective device as described in any one of claims 1 to 9.