Screen printing plate

Abstract

The invention discloses a screen printing plate which comprises a metal layer and a composite layer. The metal layer comprises a long-strip-shaped printing pattern, connecting bridges are arranged on the printing pattern in the length direction at intervals, and a hollow part penetrating through the metal layer is arranged between every two adjacent connecting bridges. The composite layer is compounded on the metal layer, the composite layer comprises a long-strip-shaped printing channel corresponding to the printing pattern, the printing channel penetrates through the composite layer and is communicated with the hollow part, and the connecting bridge is suspended in the printing channel; and the connecting bridge is provided with a material storage part towards the printing channel. The screen printing plate has the advantages of being good in inking performance, good in inking quality and not prone to line breakage, and the printing quality is guaranteed.

Description

Technical Field

[0001] The present application relates to the field of screen technology, and in particular to a printing screen. Background Art

[0002] Screen technology has the advantages of simple process, large graphic design space, and suitability for large-scale production, and has become a widely used technology in the electronics field. Taking the field of solar cells as an example, the printed screen is an important tool for printing the electrodes of solar cells. The printed screen generally includes a screen frame and a mesh stretched inside the screen frame. The conductive paste is poured on the screen, and a scraper is used to drive the conductive paste to move on the mesh, so that the conductive paste is squeezed through the mesh holes on the mesh onto the solar cell, forming a corresponding pattern on the solar cell to form the electrode of the solar cell.

[0003] The existing mesh is generally a metal mesh, which is made of metal wires interlaced in the warp and weft directions. There are nodes where the warp and weft lines intersect, and the existence of nodes can easily affect the ink-taking property and quality of the mesh, resulting in easy wire breakage and affecting the printing quality. Therefore, it is urgent to provide a new printing screen to solve at least one technical problem in the existing technology. Summary of the invention

[0004] Based on this, it is necessary to provide a printing screen to solve the above technical problems.

[0005] A technical solution of this application is:

[0006] A printing screen, comprising:

[0007] The metal layer comprises a printed pattern arranged in a long strip shape, wherein the printed pattern is provided with connecting bridges at intervals along the length direction, and a hollow portion penetrating the metal layer is formed between adjacent connecting bridges;

[0008] A composite layer, which is composited with the metal layer, the composite layer includes a strip-shaped printing channel arranged corresponding to the printing pattern, the printing channel runs through the composite layer and is connected to the hollow portion, and the connecting bridge is suspended on the printing channel;

[0009] Wherein, the connecting bridge is provided with a material storage portion toward the printing channel.

[0010] In one embodiment, the connecting bridge is recessed with a clearance space communicating with the printing channel, and the clearance space forms the material storage portion.

[0011] In one embodiment, the metal layer is defined as banks on both sides of the connecting bridge, and the thickness of the connecting bridge is smaller than the thickness of the banks.

[0012] In one embodiment, the thickness of the connecting bridge is d, and the thickness of the bank is D, wherein 2 μm≤Dd≤8 μm.

[0013] In one embodiment, the material storage portion includes a bridge bottom surface located at the connecting bridge, and the bridge bottom surface is flat, stepped or arc-shaped.

[0014] In one embodiment, the connecting bridge is an arch bridge, and an arch hole under the arch bridge forms the material storage portion.

[0015] In one embodiment, the connecting bridge includes a bridge top surface located on the bridge and a bridge bottom surface located under the bridge, and the bridge bottom surface is curved to form the material storage portion.

[0016] In one embodiment, the bridge top surface and the bridge bottom surface are both arched and arranged conformally or non-conformally.

[0017] In one embodiment, the metal layer is defined as banks on both sides of the connecting bridge, and the top surface of the bridge extends to the banks.

[0018] In one embodiment, the thickness of the connecting bridge is smaller than the thickness of other regions of the metal layer.

[0019] The beneficial effects of the present application are as follows: when the printing screen is printing slurry, part of the printing slurry crosses the connecting bridge and enters the printing channel through the storage part. The temporary storage of the slurry by the storage part allows sufficient slurry at the connecting bridge to enter the printing channel, thereby ensuring the continuity of printing and preventing the line from breaking, thereby ensuring the printing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the planar structure of the printing screen for this application;

[0021] Figure 2 for Figure 1 Schematic diagram of partial enlarged structure;

[0022] Figure 3 for Figure 2 Schematic diagram of the cross-section structure along line XX;

[0023] Figure 4 for Figure 2 Schematic diagram of the cross-sectional structure along line YY;

[0024] Figure 5 Another schematic diagram of the cross-sectional structure of the printing screen of the present application;

[0025] Figure 6 Another schematic diagram of the cross-sectional structure of the printing screen of the present application;

[0026] Figure 7Another schematic diagram of the cross-sectional structure of the printing screen of the present application;

[0027] Figure 8 Another schematic diagram of the cross-sectional structure of the printing screen of the present application;

[0028] Fig. 9 Another schematic diagram of the cross-sectional structure of the printing screen of the present application;

[0029] Fig.10 Another schematic diagram of the cross-sectional structure of the printing screen of the present application;

[0030] Fig.11 This is another schematic diagram of the cross-sectional structure of the printing screen of this application. DETAILED DESCRIPTION

[0031] In order to facilitate the understanding of the present application, the present application will be described more comprehensively below with reference to the relevant drawings. The preferred embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described below. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thoroughly and comprehensively understood.

[0032] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0034] The present invention discloses a printing screen, which comprises:

[0035] The metal layer includes a printed pattern arranged in a long strip shape, the printed pattern is provided with connecting bridges at intervals along the length direction, and a hollow portion penetrating the metal layer is formed between adjacent connecting bridges;

[0036] A composite layer, which is composited with the metal layer, the composite layer includes a strip-shaped printing channel arranged corresponding to the printed pattern, the printing channel runs through the composite layer and is connected to the hollow portion, and the connecting bridge is suspended in the printing channel;

[0037] Wherein, a material storage portion is arranged on the connecting bridge toward the printing channel.

[0038] The printing screen disclosed by the present invention has good ink delivery, good ink delivery quality, and is not easy to break, thereby ensuring the printing quality. When the printing screen is printing slurry, part of the printing slurry crosses the connecting bridge and enters the printing channel through the material storage part. The temporary storage of the slurry by the material storage part allows sufficient slurry at the connecting bridge to enter the printing channel, thereby ensuring the continuity of printing and not easy to break the line, thereby ensuring the printing quality. The material storage part can also prevent the connecting bridge from entering the printing channel when the metal layer is compounded with the compound layer, thereby affecting the printing space and ink delivery of the printing channel, thereby ensuring the smoothness of the printing channel, thereby ensuring the continuity of printing and the printing quality.

[0039] In one embodiment, the connecting bridge is concavely provided with a clearance space connected to the printing channel, and the clearance space forms a material storage portion. The clearance space concavely provided by the connecting bridge is easy for the slurry to enter, eliminating the influence of the connecting bridge on the ink supply, ensuring the continuity of printing and preventing the line from being broken.

[0040] In one embodiment, the metal layer is defined as banks on both sides of the connecting bridge, and the thickness of the connecting bridge is less than the thickness of the banks. The connecting bridge is thinned to facilitate the slurry to enter the printing channel through the connecting bridge, thereby eliminating the influence of the connecting bridge on the printing channel. Preferably, the thickness of the connecting bridge is d, and the thickness of the bank is D, wherein 2μm≤Dd≤8μm. The thickness of the metal layer excluding the connecting bridge is D, and the thickness of the connecting bridge is d. The bank and the connecting bridge are flush on one side of the metal layer, that is, the side of the metal layer used for scraping ink is flush, that is, the other side of the metal layer composite composite layer is flush, and the lower side of the connecting bridge is concavely arranged, and forms a make way space with the banks on both sides, so that the storage portion obtained in this way increases the ink-lowering property and ensures the space of the printing channel.

[0041] In one embodiment, the connecting bridge includes a bridge top surface located on the bridge and a bridge bottom surface located under the bridge, and the material storage part includes a bridge bottom surface located on the connecting bridge, and the bridge bottom surface is flat, stepped or arc-shaped. The stepped and arc-shaped shapes can increase the space of the material storage part.

[0042] In one embodiment, the connecting bridge is an arch bridge, and the arch hole under the arch bridge forms a material storage part. The space formed by the arch hole is easy for the slurry to enter, eliminating the influence of the connecting bridge on the ink feeding, ensuring the continuity of printing and not easy to break the line. The material storage part obtained in this way increases the ink feeding performance and ensures the space of the printing channel.

[0043] In one embodiment, the connecting bridge includes a bridge top surface located on the bridge and a bridge bottom surface located under the bridge, and the bridge bottom surface is bent to form a material storage portion. Preferably, the bridge bottom surface is bent in an arc shape, and after the bridge bottom surface is arched, it can prevent the connecting bridge from entering the printing channel during lamination and thus affecting the printing channel, thereby ensuring ink loading and printing quality.

[0044] In one embodiment, the bridge top surface and the bridge bottom surface are both arched and arranged conformally or non-conformally. When arranged conformally, the thickness of the connecting bridge is uniformly arranged, and the thickness of the connecting bridge and the overall thickness of the metal layer can be uniformly arranged. When arranged non-conformally, the curvature of the bridge top surface can be greater or less than the curvature of the bridge bottom surface. The bridge top surface of the connecting bridge protrudes from other places on the surface of the metal layer, which is conducive to the formation of the connecting bridge and the material storage part, and is also conducive to the ink scraping quality.

[0045] In one embodiment, the top surface of the bridge extends to the shore, which reduces the curvature of the top surface of the bridge, strengthens the strength of the connecting bridge, and is beneficial to the formation of the material storage part, thereby ensuring the ink delivery performance and quality.

[0046] In one embodiment, the thickness of the connecting bridge is less than the thickness of other areas of the metal layer. At least the thickness of part of the connecting bridge is reduced, which is beneficial to the stability of the connecting bridge and can increase the space of the material storage part, thereby ensuring the ink feeding performance and ink feeding quality.

[0047] Please refer to Figures 1 to 11 , an example is given to describe the printing screen of the present application.

[0048] Please refer to Figures 1 to 4 The present invention discloses a printing screen 100, which includes a metal layer 101 and a composite layer 102 arranged in a stacked manner, and the composite layer 102 includes a connecting layer 103 located between the metal layer 101 and the composite layer 102. The metal layer 101 includes a plurality of printing patterns 1 arranged in a strip shape at intervals and a grid area 2 around the printing pattern 1. The printing pattern 1 is provided with connecting bridges 11 arranged in an interval along the length direction, and a hollow portion 12 penetrating the metal layer 101 is provided between adjacent connecting bridges. The grid area 2 includes warps 21 and wefts 22 arranged in a cross-knotted manner, and meshes 23 formed by the warps 21 and wefts 22. The composite layer 102 is composited to the metal layer 101 through the connecting layer 103, and the composite layer 102 includes a printing channel 3 in a strip shape and arranged corresponding to the printing pattern 1, the printing channel 3 penetrates the composite layer 102 and is connected to the hollow portion 12, and the connecting bridge 11 is suspended in the printing channel 3. The connecting bridge 11 is provided with a material storage portion 13 toward the printing channel 3. When the printing screen 100 prints slurry (e.g., conductive ink, not shown), part of the printing slurry crosses the connecting bridge 11 and enters the printing channel 3 through the storage portion 13. The temporary storage of the slurry by the storage portion 13 allows sufficient slurry at the connecting bridge 11 to enter the printing channel 3, ensuring the continuity of printing and preventing the line from being broken, thereby ensuring the printing quality. The storage portion 13 can also prevent the connecting bridge 11 from entering the printing channel 3 when the metal layer 101 is composited with the composite layer 102, thereby affecting the printing space and ink feeding of the brush channel 3, ensuring the smoothness of the printing channel 3, thereby ensuring the continuity and printing quality of the printing.

[0049] The metal layer 101 is a nickel layer or a nickel alloy layer, and may also be other metal or alloy layers. The composite layer 102 is a polymer layer, such as a PI layer. The connecting layer 103 is an adhesive layer, such as an OCA adhesive layer. In other embodiments, the composite layer 102 may also be directly composited with the metal layer 101. In other embodiments, the composite layer 102 is also a metal layer.

[0050] Please continue reading Figure 3 and Figure 4 The connecting bridge 11 is recessed with a makeshift space connected to the printing channel 3. The makeshift space forms a material storage portion 13, which does not affect the space of the printing channel 3 and facilitates the entry of slurry, thereby ensuring the continuity of printing and preventing line breakage. Specifically, the metal layer 101 is defined as the shore 24 on both sides of the connecting bridge 11, the thickness of the connecting bridge 11 is defined as d, the thickness of the shore 24 is D, and d<D. The lower side of the connecting bridge 11 is thinned to form a material storage portion at the thinned portion, which makes it easy for the slurry to enter the printing channel through the connecting bridge, thereby eliminating the influence of the connecting bridge 11 on the printing channel, ensuring the spatiality of the printing channel, and ensuring the ink-taking property. Furthermore, 2μm≤Dd≤8μm, and the ink-taking property is very good within this thickness difference range.

[0051] The connecting bridge 11 includes a bridge top surface 111 located on the bridge and a bridge bottom surface 112 located under the bridge, and the bridge bottom surface 112 forms a material storage portion 13. The bridge bottom surface 112 is flat, and the material storage portion 13 is groove-shaped. Figure 3 and Figure 4 For other embodiments, please refer to Figure 5 and Figure 6 The bridge bottom surface 112 (for the sake of clarity and ease of understanding, the same reference numerals are used in different embodiments, the same below) is stepped, and the thickness of the connecting bridge 11 is set in steps to increase the space of the material storage part 13 and strengthen the strength of the connecting bridge 11. The thickness of the connecting bridge 11 on both sides close to the shore 24 is the same as that of the shore 24, and the thickness of the connecting bridge 11 in the middle position is reduced. Figure 5 The thickness of the two sides of the connecting bridge 11 is less than the thickness of the bank 24, and the thickness of the two sides of the connecting bridge 11 is greater than the thickness of the middle of the connecting bridge 11, as shown in FIG. Figure 6 For other embodiments, please refer to Figure 7 As shown, the bridge bottom surface 112 is in an arc shape, and the thickness of the connecting bridge 11 is set in steps, which increases the space of the material storage part 13 and strengthens the strength of the connecting bridge 11. In other embodiments, the bridge bottom surface 112 is in other shapes such as undulating and irregular.

[0052] Please refer to Figure 8In another embodiment, the connecting bridge 11 is an arch bridge, and the arch hole under the arch bridge forms a material storage part. The space formed by the arch hole is easy for the slurry to enter, ensuring the continuity of printing and not easy to break the line, thereby ensuring the printing quality. The connecting bridge 11 includes a bridge top surface 111 located on the bridge and a bridge bottom surface 112 located under the bridge, and the bridge bottom surface 112 is bent to form a material storage part 13. The bridge bottom surface 112 is bent in an arc shape. After the bridge bottom surface 112 is arched, it can prevent the connecting bridge 11 from entering the printing channel 3 during compounding, thereby affecting the printing channel 3, thereby ensuring the ink filling and printing quality. The bridge top surface 111 and the bridge bottom surface 112 are both arched and conformally arranged, and the thickness of the connecting bridge 11 is equal to the thickness of the bank 24 and other areas of the metal layer. In other embodiments, the bridge top surface 111 and the bridge bottom surface 112 are both arched but not conformally arranged, and the arcs of the bridge top surface 111 and the bridge bottom surface 112 are arranged differently. Fig. 9 As shown, the curvature of the bridge top surface 111 extends to the shore 24, the thickness of the connecting bridge 11 is thin in the middle and thick on both sides, and the bridge body is more stable. Fig.10 As shown, the curvature of the bridge bottom surface 112 is smaller than the curvature of the bridge top surface 111 , which can increase the space of the material storage portion 13 and ensure the ink delivery performance and quality.

[0053] Please refer to Fig.11 In another embodiment, the connecting bridge 11 is arranged in an arch shape, and the bottom surface 112 of the bridge is further recessed. The thickness of the connecting bridge 11 is less than the thickness of the bank 24, that is, the connecting bridge 11 is arranged in an arch shape while being thinned, so as to prevent the space of the printing channel from being affected during compounding, ensure the ink feeding property and ink feeding quality, prevent line breakage, and improve the printing quality.

[0054] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail above in conjunction with the accompanying drawings. In the above description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described above, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed above. In addition, the various technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the various technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0055] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A printing screen, characterized in that: It includes: The metal layer comprises a printed pattern arranged in a long strip shape, wherein the printed pattern is provided with connecting bridges at intervals along the length direction, and a hollow portion penetrating the metal layer is formed between adjacent connecting bridges; A composite layer, which is composited with the metal layer, the composite layer includes a strip-shaped printing channel arranged corresponding to the printing pattern, the printing channel runs through the composite layer and is connected to the hollow portion, and the connecting bridge is suspended on the printing channel; Wherein, the connecting bridge is provided with a material storage portion toward the printing channel.

2. The printing screen according to claim 1, characterized in that: The connecting bridge is recessed with a clearance space communicating with the printing channel, and the clearance space forms the material storage portion.

3. The printing screen according to claim 2, characterized in that: The metal layer is defined as banks on both sides of the connecting bridge, and the thickness of the connecting bridge is smaller than the thickness of the banks.

4. The printing screen according to claim 3, characterized in that: The thickness of the connecting bridge is d, and the thickness of the bank is D, wherein 2 μm≤Dd≤8 μm.

5. The printing screen according to claim 2, characterized in that: The material storage portion includes a bridge bottom surface located at the connecting bridge, and the bridge bottom surface is in a plane shape, a step shape or an arc shape.

6. The printing screen according to claim 1, characterized in that: The connecting bridge is an arch bridge, and the arch hole under the arch bridge forms the material storage part.

7. The printing screen according to claim 6, characterized in that: The connecting bridge comprises a bridge top surface located on the bridge and a bridge bottom surface located under the bridge, and the bridge bottom surface is bent to form the material storage portion.

8. The printing screen according to claim 7, characterized in that: The bridge top surface and the bridge bottom surface are both arched and arranged conformally or non-conformally.

9. The printing screen according to claim 7, characterized in that: The metal layer is defined as banks on both sides of the connecting bridge, and the top surface of the bridge extends to the banks.

10. The printing screen according to claim 6, characterized in that: The thickness of the connecting bridge is smaller than the thickness of other regions of the metal layer.

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