Flexible alloy screen printing plate and manufacturing method therefor

Abstract

The present invention provides a flexible alloy screen printing plate and a manufacturing method therefor. The screen printing plate has relatively good strength and certain toughness. The flexible alloy screen printing plate comprises a plastic thin film, wherein a conducting layer is provided on one surface or both surfaces of the plastic thin film. An alloy gauze is arranged outside the conducting layer. The part of the outer side of the alloy gauze that has no pattern is coated with an emulsion layer. A first printing pattern is arranged on the plastic thin film; a second printing pattern that matches the first printing pattern is arranged on the alloy gauze; and a third printing pattern that matches the first printing pattern is arranged on the emulsion layer.

Description

A flexible alloy screen and its manufacturing method Technical Field

[0001] This invention relates to the field of screen printing technology, specifically to a flexible alloy screen printing plate and its manufacturing method. Background Technology

[0002] Screen printing technology has become a widely used technology in the electronics field due to its advantages such as simple process, large graphic design space, and suitability for large-scale production. Taking the field of solar cells as an example, printing screens are an important tool for printing the electrodes of solar cells. A printing screen generally consists of a screen frame and a mesh stretched within the screen frame. Conductive paste is poured onto the screen, and a squeegee is used to move the conductive paste on the mesh, so that the conductive paste is squeezed through the printed pattern on the mesh onto the solar cell, forming the corresponding pattern on the solar cell to form the electrodes of the solar cell.

[0003] Currently, alloy materials are used in the selection of mesh materials to meet the strength requirements of screen printing plates. However, screen printing plates made of alloy materials have high strength but poor toughness, making them prone to bursting or cracking, and their service life is somewhat limited. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, this invention provides a flexible alloy screen with good strength and a certain degree of toughness.

[0005] The present invention solves the technical problem by adopting the following technical solution:

[0006] A flexible alloy screen includes a plastic film, a conductive layer on one or both sides of the plastic film, an alloy mesh on the outside of the conductive layer, an emulsion layer coated on the unpatterned portion of the alloy mesh, a first printed pattern on the plastic film, a second printed pattern matching the first printed pattern on the alloy mesh, and a third printed pattern matching the first printed pattern on the emulsion layer.

[0007] The invention of this application has the following beneficial effects:

[0008] In this application, a plastic film and an emulsion layer are set in the flexible alloy screen, which improves the overall toughness of the screen. The required patterns are then created on the plastic film and emulsion layer by laser cutting. This method is highly practical, and the emulsion layer on the surface has a buffering effect, which reduces the possibility of screen cracking or bursting and extends its service life.

[0009] Preferably, the alloy mesh is made of nickel alloy material, and the thickness of the alloy mesh is 3-300μm.

[0010] Preferably, the plastic film is one or more of PI, PU, ​​PE, TPE, PET, PVC, and PMMA materials, and the thickness of the plastic film is 1-30μm.

[0011] Preferably, the conductive layer is copper, nickel, or tin-doped indium oxide, and the thickness of the conductive layer is 1-500 nm.

[0012] Preferably, the width of the first printed pattern is 80nm-100μm, the width of the second printed pattern is 40nm-200μm, and the width of the third printed pattern is 40nm-200μm.

[0013] Preferably, the thickness of the emulsion layer is 0.1-15 μm.

[0014] This invention also provides a method for manufacturing a flexible alloy screen, comprising the following steps:

[0015] Step 1: Metallize one or both sides of the plastic film to form a conductive layer;

[0016] Step 2: Coat the outside of the conductive layer with a photosensitive material layer;

[0017] Step 3: Perform alignment, exposure, and development on the photosensitive material layer;

[0018] Step 4: Create an alloy mesh on the outer side of the photosensitive material layer using electroforming.

[0019] Step 5: Coat the outer layer of the alloy mesh with latex to create a prefabricated screen.

[0020] Step Six: Bake the pre-made screen.

[0021] Step 7: Demold the precast mesh.

[0022] Step 8: Attach the precast mesh to the frame of the demolded precast mesh slab;

[0023] Step 9: Shape the pattern on the plastic film and latex layer and match it with the pattern on the alloy mesh to obtain the finished flexible alloy mesh.

[0024] The invention of this application has the following beneficial effects:

[0025] This invention first forms a conductive layer on the surface of a plastic film through metallization, enabling it to conduct current. Then, a photosensitive material layer is coated onto the outside of the conductive layer, followed by alignment, exposure, and development. Next, the photosensitive material layer is electroformed into an alloy mesh. Then, an emulsion agent is coated onto the outside of the alloy mesh, and it is baked to form a semi-finished screen. After demolding, screen stretching, and other manufacturing processes, it is attached to a frame. Finally, the pattern on the plastic film is shaped using laser engraving, matching the pattern on the plastic film with the pattern on the alloy mesh, thus creating a finished flexible alloy screen. The flexible alloy screen produced in this way has high strength and high toughness, and the outer surface of the screen also has a cushioning emulsion layer, resulting in a longer service life compared to currently available flexible alloy screens.

[0026] Preferably, in step one, a conductive layer is deposited on the surface of the plastic film using a coating device, and the thickness of the deposited layer is 1-500 nm.

[0027] Preferably, in step nine, the pattern on the plastic film is formed by laser engraving, and the equipment is a laser engraving machine.

[0028] Preferably, in step two, the photosensitive material layer is coated using a dry film or wet film method, with a coating thickness of 0.2-150 μm. Attached Figure Description

[0029] Figure 1 is a schematic cross-sectional view of the first structure of a flexible alloy mesh according to the present invention.

[0030] Figure 2 is a schematic diagram of the cross-sectional structure of a second structure of a flexible alloy mesh in this invention.

[0031] Figure descriptions: 1. Alloy mesh, 2. Plastic film, 3. Emulsion layer, 4. Conductive layer, 5. First printed pattern, 6. Second printed pattern, 7. Third printed pattern. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] See Figures 1 and 2 for details:

[0034] This invention provides a flexible alloy screen printing plate, comprising a plastic film 2, a conductive layer 4 disposed on any one or both sides of the plastic film 2, an alloy mesh 1 disposed outside the conductive layer 4, and an emulsion layer 3 coated on the unpatterned portion of the alloy mesh 1. A first printed pattern 5 is disposed on the plastic film 2, a second printed pattern 6 matching the pattern of the first printed pattern 5 is disposed on the alloy mesh 1, and a third printed pattern 7 matching the pattern of the first printed pattern 5 is disposed on the emulsion layer 3. In this application, the flexible alloy screen printing plate incorporates a plastic film 2 and an emulsion layer 3, improving the overall toughness of the screen printing plate. The desired pattern is created on the plastic film 2 and the emulsion layer 3 using laser cutting, resulting in strong practicality. Furthermore, the surface emulsion layer 3 provides a buffering effect, reducing the overall possibility of screen printing plate cracking or bursting, and extending its service life.

[0035] In this embodiment, the alloy mesh 1 is made of nickel alloy material, and the thickness of the alloy mesh 1 is 3-300μm. In this way, the nickel alloy has good mechanical, physical and chemical properties, and its oxidation resistance, corrosion resistance and high temperature strength are also excellent, which can meet the application requirements.

[0036] In this embodiment, the plastic film 2 is one or more of PI, PU, ​​PE, TPE, PET, PVC, and PMMA. The thickness of the plastic film 2 is 1-30μm. Multiple plastic films can also be used in combination, and the plastic film is not limited to the above-mentioned materials.

[0037] In this embodiment, the conductive layer 3 is copper, nickel, or tin-doped indium oxide, and the thickness of the conductive layer 3 is 1-500 nm, which provides good conductivity.

[0038] In this embodiment, the width of the first printed pattern 5 is 80nm-100μm, the width of the second printed pattern 6 is 40nm-200μm, and the width of the third printed pattern 7 is 40nm-200μm.

[0039] In this embodiment, the thickness of emulsion layer 3 is 0.1-15 μm.

[0040] This invention also provides a method for manufacturing a flexible alloy screen, comprising the following steps:

[0041] Step 1: Metallize one or both sides of the plastic film to form a conductive layer;

[0042] Step 2: Coat the outside of the conductive layer with a photosensitive material layer;

[0043] Step 3: Perform alignment, exposure, and development on the photosensitive material layer;

[0044] Step 4: Create an alloy mesh on the outer side of the photosensitive material layer using electroforming.

[0045] Step 5: Coat the outer layer of the alloy mesh with latex to create a prefabricated screen.

[0046] Step Six: Bake the pre-made screen.

[0047] Step 7: Demold the precast mesh.

[0048] Step 8: Attach the pre-made mesh to the frame of the pre-made screen after demolding;

[0049] Step Nine: The pattern on the plastic film and latex layer is molded and matched with the pattern on the alloy mesh to obtain the finished flexible alloy mesh. This invention first forms a conductive layer on the surface of the plastic film through metallization, enabling current conduction. Then, a photosensitive material layer is coated on the outside of the conductive layer and subjected to alignment exposure and development. Next, the photosensitive material layer is electroformed into an alloy mesh. Then, an latex agent is coated on the outside of the alloy mesh and baked to form a semi-finished mesh. Following demolding and mesh stretching processes, it is attached to a frame. Finally, the pattern on the plastic film is molded using laser engraving, matching the pattern on the plastic film with the pattern on the alloy mesh, thus producing the finished flexible alloy mesh. Flexible alloy mesh produced in this way has high strength and high toughness. The outer surface of the alloy mesh also has a cushioning emulsion layer, making it more durable and having a longer service life compared to currently available flexible alloy meshes.

[0050] In this embodiment, in step one, a conductive layer is deposited on the surface of the plastic film using a coating equipment. The thickness of the deposited layer is 1-500nm, which forms a conductive layer on the outside of the plastic film to facilitate the subsequent electroforming of the alloy mesh.

[0051] In this embodiment, in step nine, the pattern on the plastic film is formed by laser engraving, and the equipment is a laser engraving machine.

[0052] In this embodiment, in step two, the photosensitive material layer is coated using a dry film or wet film method, with a coating thickness of 0.2-150μm.

[0053] In this embodiment, in step three, alignment exposure is performed using a Heidelberg DWL4000, and development is performed using a cosmic development device.

[0054] In this embodiment, the latex material is Swiss 1504 oil-based thick-plate photosensitive emulsion SBQ.

[0055] In this embodiment, the equipment for baking the pre-made screen is a constant temperature drying oven, and the baking temperature is 120℃-200℃ for 60 minutes. In this way, by hardening the film, a film is formed on the outside of the metal screen, which can greatly improve the water resistance and printing durability.

[0056] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for manufacturing a flexible alloy mesh screen, characterized in that: The flexible alloy screen includes a plastic film, with a conductive layer on one or both sides of the plastic film. An alloy mesh is disposed outside the conductive layer, and an emulsion layer is coated on the unpatterned portion of the alloy mesh. A first printed pattern is disposed on the plastic film, a second printed pattern matching the first printed pattern is disposed on the alloy mesh, and a third printed pattern matching the first printed pattern is disposed on the emulsion layer. The manufacturing method of the flexible alloy screen includes the following steps: Step 1: Metallize one or both sides of the plastic film to form a conductive layer; Step 2: Coat the outside of the conductive layer with a photosensitive material layer; Step 3: Perform alignment, exposure, and development on the photosensitive material layer; Step 4: Create an alloy mesh on the outer side of the photosensitive material layer using electroforming. Step 5: Coat the outer layer of the alloy mesh with an emulsion layer to create a prefabricated screen. Step 6: Bake the prefabricated screen using a constant temperature drying oven at a temperature of 120℃-200℃ for 60 minutes. Step 7: Demold the precast mesh. Step 8: Attach the pre-made mesh to the frame of the pre-made screen after demolding; Step 9: The pattern on the plastic film and emulsion layer is formed by laser engraving. The equipment is a laser engraving machine, and the pattern is consistent with the pattern on the alloy mesh to obtain the finished flexible alloy mesh.

2. The method for manufacturing a flexible alloy mesh screen according to claim 1, characterized in that: The alloy mesh is made of nickel alloy material, and the thickness of the alloy mesh is 3-300μm.

3. The method for manufacturing a flexible alloy mesh screen according to claim 1, characterized in that: The plastic film is one or more of PI, PU, ​​PE, TPE, PET, PVC, and PMMA materials, and the thickness of the plastic film is 1-30μm.

4. The method for manufacturing a flexible alloy mesh screen according to claim 1, characterized in that: The conductive layer is made of copper, nickel, or tin-doped indium oxide, and the thickness of the conductive layer is 1-500 nm.

5. The method for manufacturing a flexible alloy mesh screen according to claim 1, characterized in that: The width of the first printed pattern is 80nm-100μm, the width of the second printed pattern is 40nm-200μm, and the width of the third printed pattern is 40nm-200μm.

6. The method for manufacturing a flexible alloy mesh screen according to claim 1, characterized in that: The thickness of the emulsion layer is 0.1-15 μm.

7. The method for manufacturing a flexible alloy mesh screen according to claim 1, characterized in that: In step one, a conductive layer is deposited on the surface of the plastic film using a coating equipment, with a thickness of 1-500 nm.

8. The method for manufacturing a flexible alloy mesh screen according to claim 1, characterized in that: In step two, the photosensitive material layer is coated using a dry film or wet film method, with a coating thickness of 0.2-150μm.

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