Knotless metal net film and screen plate thereof

Abstract

A knotless metal net film (10), which at least comprises a first metal layer. A plurality of first grid line areas are arranged on the first metal layer; the first metal layer is composed of at least 50% of nickel, and the content of nickel is not greater than 97%; and the first metal layer at least further contains other metal materials, and the total content of other metal materials is not greater than 50% and not less than 3%. Nickel and other metals are used in at least one metal layer provided with a grid line area in the metal net film, wherein the content of other metals is not less than 3%, and one or two or more metals can be mixed in nickel, such that it can be ensured that the prepared metal net film has enough toughness and net stretching strength, thereby effectively prolonging the service life of the metal net film. The present invention further relates to a screen plate.

Description

Knotless metal mesh film and screen plate thereof Technical Field

[0001] The present application relates to the field of screen technology, and in particular to a knotless metal mesh film and a screen thereof. Background Art

[0002] Screen printing technology, with its advantages of simple process, ample graphic design space, and suitability for large-scale production, has become widely used in the electronics field. For example, in the field of solar cells, screens are essential tools for printing solar cell electrodes. Screens typically consist of a screen frame and a mesh stretched within it. Conductive paste is poured onto the screen and then moved across the mesh with a scraper, forcing the paste through the mesh holes and onto the solar cell, forming a corresponding pattern on the solar cell, thus forming the solar cell's electrodes.

[0003] Conventional knotless screens or gauze are typically produced by laser cutting a metal film to create an ink-dropping area. Furthermore, knotless screens or gauze are often produced through electroplating. However, the strength of these screens or gauze produced through electroplating is insufficient, resulting in a short lifespan. Furthermore, these screens or gauze produced through conventional electroplating processes are also insufficiently tough, making them prone to breakage during the printing screen fabrication process. Therefore, there is an urgent need to provide a new knotless metal mesh film that can address at least one of the technical issues encountered in the prior art. Summary of the Invention

[0004] Based on this, it is necessary to provide a knotless metal mesh film and its screen to solve the above technical problems.

[0005] A technical solution of this application is:

[0006] A knotless metal mesh film comprises at least a first metal layer, on which a plurality of first gate line regions are arranged. The invention is characterized in that the first metal layer is composed of at least 50% nickel and the nickel content is not greater than 97%.

[0007] In one embodiment, the first metal layer is in a grid shape, wherein adjacent first gate line regions are separated by non-gate line regions, and the grid width of the first gate line regions is greater than or equal to the grid width of the non-gate line regions.

[0008] In one embodiment, a second metal layer is further included, and a plurality of second gate line regions are provided on the second metal layer, wherein the second metal layer is composed of at least 50% nickel; or the second metal layer is composed of more than 97% nickel.

[0009] In one embodiment, the width of the second gate line region is greater than or equal to the width of the first gate line region, and the first gate line region is connected to the second gate line region.

[0010] In one embodiment, the first metal layer further contains at least one or more of the metal materials iron and chromium.

[0011] In one embodiment, the total content of the metal material is not greater than 50% and not less than 3%.

[0012] In one embodiment, the second metal layer is formed on the surface of the first metal layer by electroplating, and the first metal layer is used as a seed layer in the electroplating process. The first metal layer is energized to grow the second metal layer on its surface.

[0013] In one embodiment, the electroplating solution for preparing the second metal layer includes at least nickel sulfamate and nickel chloride.

[0014] In one embodiment, the first metal layer is formed by an electroplating process, wherein the plating solution in the electroplating process includes at least nickel sulfamate, nickel chloride, and at least one or a combination of two or more of cobalt sulfamate, ferrous sulfamate, ferrous chloride, manganese salt solution, chromic anhydride solution, and copper salt solution.

[0015] A screen, characterized in that it comprises a screen frame, a mesh cloth, a mask and the knotless metal mesh film described in any one of the above items, wherein the knotless metal mesh film is fixed to the screen frame through the mesh cloth.

[0016] The beneficial effects of the present application are as follows: in the metal mesh film provided by the present application, at least one metal layer with a grid line area adopts nickel and other metals, wherein the content of other metals is not less than 3%, and one or more metals can be mixed in the nickel, so as to ensure that the prepared metal mesh film has sufficient toughness and mesh strength, and effectively improve the service life of the metal mesh film; when the metal mesh film has a two-layer structure, the metal material of the second metal layer is mainly nickel, preferably pure nickel, which can greatly improve the ductility of the metal mesh film and enhance its wear resistance and corrosion resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] FIG1 is a schematic diagram of a printing screen of the present application;

[0018] FIG2 is a schematic structural diagram of a knotless metal mesh film of the present application;

[0019] FIG3 is a schematic diagram of the cross-sectional structure of the knotless metal mesh film of FIG2 of the present application;

[0020] FIG4 is a schematic diagram of another structure of the knotless metal mesh film of the present application;

[0021] FIG5 is a schematic diagram of the cross-sectional structure of the knotless metal mesh film in FIG4 of the present application. DETAILED DESCRIPTION

[0022] To facilitate understanding of the present application, a more comprehensive description of the present application will be provided below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described below. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure of the present application.

[0023] 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 an element centered thereon. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an element centered thereon. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementations.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are intended only to describe specific embodiments and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] A knotless metal mesh film comprises at least a first metal layer, on which a plurality of first grid line areas are provided, and the knotless metal mesh film is mainly used to prepare grid line electrodes on the surface of solar cells; the grid line electrodes on the surface of the solar cells mainly comprise fine grid electrodes arranged in parallel, and a main grid electrode perpendicular to the fine grid electrodes, so that the electricity converted by the solar cells is transmitted out through the grid line electrodes; it is characterized in that the first metal layer is composed of at least 50% nickel, and the nickel content is not more than 97%, so that the first metal layer also contains other substances, of course, the other substances are preferably metal materials, for example, in one embodiment, the first metal layer also contains at least one or more of the metal materials cobalt, copper, manganese, iron, and chromium, and the total content of the metal materials is not more than 50%, and not less than 3%.

[0026] In this way, the first metal layer is made of nickel alloy, which can well ensure that the first metal layer has sufficient toughness and mesh strength, and effectively improve the service life of the metal mesh film; furthermore, when the metal mesh film is a single-layer structure, it can also be used for printing surface electrodes of solar cell panels; it can also be a double-layer metal layer structure.

[0027] In one embodiment, the first metal layer is in a grid shape, wherein adjacent first gate line areas are separated by non-gate line areas, and the grid width of the first gate line area is greater than or equal to the width of the grid of the non-gate line area; in this case, it is a metal mesh film of a metal layer, which can also be called metal mesh. In this way, the first metal layer is set to a grid shape, and the grid width of the first gate line area is greater than that of other areas. In this way, when the metal mesh film is used in conjunction with the PI film, the PI film can be better lasered in the first gate line area. At this time, the laser grid space on the PI film corresponds to the first gate line area.

[0028] In one embodiment, a second metal layer is further included, wherein a plurality of second gate line regions are provided on the second metal layer, wherein the second metal layer is composed of at least 50% nickel; or the second metal layer is composed of more than 97% nickel; the second metal layer is superimposed on the first metal layer, the width of the second gate line region is greater than or equal to the width of the first gate line region, and the first gate line region is connected to the second gate line region. The nickel content in the second metal layer is generally greater than the nickel content in the first metal layer. Preferably, the nickel content in the second metal layer is greater than 99%, and is substantially pure nickel. This ensures that the metal mesh film has a certain degree of toughness and corrosion resistance while having a certain strength, which can greatly improve the service life of the metal mesh film.

[0029] The second metal layer may be in a grid shape. When the second metal layer is in a grid shape, the non-gate line region of the first metal layer is solid metal, so that the second metal layer can be more easily prepared into a grid on its surface.

[0030] In one embodiment, the second metal layer is formed on the surface of the first metal layer by electroplating, and the first metal layer is used as a seed layer in the electroplating process. The first metal layer is energized to grow the second metal layer on the surface. In one embodiment, the electroplating solution for forming the second metal layer includes at least nickel sulfamate and nickel chloride.

[0031] In one embodiment, the first metal layer is formed by an electroplating process, wherein the plating solution in the electroplating process includes at least nickel sulfamate, nickel chloride, and at least one or a combination of two or more of cobalt sulfamate, ferrous sulfamate, ferrous chloride, manganese salt solution, chromic anhydride solution, and copper salt solution.

[0032] A screen comprises a screen frame, a mesh cloth, a mask and any one of the above described knotless metal mesh films, wherein the knotless metal mesh film is fixed to the screen frame through the mesh cloth.

[0033] Please refer to Figure 1, which shows a screen, comprising a metal mesh film 10, a mesh cloth 20, and a metal mesh frame 30. The metal mesh film 10 is connected to the metal mesh frame 30 through the mesh cloth. The grid line electrodes can be printed on the solar cell through the screen. Of course, the screen is also used in other fields, such as biomedicine, semiconductors, etc.

[0034] Please refer to Figures 2 and 3, which are partial enlarged views of the knotless metal mesh film. The metal mesh film 10 includes a grid line area 102 (or referred to as the first grid line area) and a non-grid line area 101. The grid line area 102 is in a grid shape, and the non-grid line area 101 is also in a grid shape, wherein the grid width in the grid line area 102 is greater than the grid width of the non-grid line area 101, and the grid line areas 102 are separated by the non-grid line area 101, and the grid line areas 102 are mainly used for the sliding of the printing paste. As can be seen from Figure 3, the metal mesh film 10 is a single-layer structure with only one first metal layer. When there is a metal layer on one side, the material of the first metal layer is preferably a nickel alloy, wherein the metal material combined with nickel is preferably one or more of cobalt, copper, manganese, iron, and chromium.

[0035] Please refer to Figures 4 and 5, which are partial enlarged views of another knotless metal mesh film. The metal mesh film 10 includes a gate line area 104 and a non-gate line area 103. The gate line area 104 is composed of a first gate line area and a second gate line, and the first gate line area and the second gate line area are connected. As can be seen from Figure 5, the metal mesh film 10 includes a first metal layer 103b and a second metal layer 103a. The first metal layer 103b and the second metal layer 103a are superimposed to form a non-gate line area 103. As can be seen from Figure 5, the non-gate line area 103 is not in the shape of a grid, but is a metal sheet. The material preferably used for the first metal layer 103b is a nickel alloy, wherein the metal material combined with nickel is preferably one or a combination of two or more of cobalt, copper, manganese, iron, and chromium. The second metal layer 103a is preferably made of a nickel-containing metal with a content of more than 97%, and at least the nickel content in the second metal layer needs to be greater than or equal to the nickel content in the first metal layer.

[0036] In order to make the above-mentioned objects, 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 with reference to 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. Therefore, the present application is not limited to the specific embodiments disclosed above. In addition, the various technical features of the embodiments described above can be combined arbitrarily. In order to make the description concise, not all possible combinations of the various technical features in the above embodiments are 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.

[0037] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A knotless metal mesh, comprising at least a first metal layer, on which a plurality of first grid line areas are provided, characterized in that, The first metal layer is composed of at least 50% nickel, and the content of nickel is not more than 97%.

2. The knotless metal mesh according to claim 1, wherein The first metal layer is in a grid shape. Among them, adjacent first grid line areas are separated by non-grid line areas, and the grid width of the first grid line area is greater than or equal to the grid width of the non-grid line area.

3. The knotless metal wire mesh according to claim 1, wherein It further includes a second metal layer. There are several second grid line areas provided on the second metal layer. Among them, the second metal layer is composed of at least 50% nickel; or the second metal layer is composed of more than 97% nickel.

4. The knotless metal mesh according to claim 3, wherein The width of the second grid line area is greater than or equal to the width of the first grid line area, and the first grid line area and the second grid line area are connected and arranged.

5. The knotless metal mesh according to claim 1, characterized in that, The first metal layer further contains at least one or more of the metal materials cobalt, copper, manganese, iron, and chromium.

6. The knotless metal mesh according to claim 5, characterized in that, The total content of the metal materials is not more than 50% and not less than 3%.

7. The knotless metal mesh according to claim 3, characterized in that, The second metal layer is formed on the surface of the first metal layer by electroplating. The first metal layer is used as the seed layer in the electroplating process, and electricity is applied to the first metal layer to grow the second metal layer on its surface.

8. The knotless metal mesh according to claim 7, characterized in that The electroplating solution for preparing the second metal layer at least includes nickel sulfamate and nickel chloride.

9. The knotless metal mesh according to claim 1, wherein The first metal layer is formed by an electroplating process. The electroplating solution in the electroplating process at least includes nickel sulfamate and nickel chloride, and at least one or more combinations of cobalt sulfamate, ferrous sulfamate, ferrous chloride, manganese salt solution, chromic anhydride solution, and copper salt solution.

10. A stencil, characterized in that, It includes a frame, a mesh cloth, a mask, and a knotless metal mesh as described in any one of claims 1 to 9. The knotless metal mesh is fixed to the frame through the mesh cloth.

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