Non-junction metal net film and screen printing plate thereof

Abstract

The invention discloses a junction-free metal net film 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 the nickel is not larger than 97%. Wherein the first metal layer at least contains other metal materials, and the total content of the metal materials is not more than 50% and not less than 3%. According to the metal net film, at least one metal layer provided with the grid line area is made of nickel and other metal, the content of other metal is not smaller than 3%, one or two or more kinds of metal can be mixed in nickel, and therefore it can be guaranteed that the prepared metal net film has enough toughness and net stretching strength; and the service life of the metal net film can be effectively prolonged.

Description

Technical Field

[0001] This application relates to the technical field of screen plates, and particularly to a knotless metal screen mesh and its screen plate. Background Art

[0002] Screen plate 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 solar cell field as an example, the screen plate is an important tool for printing the electrodes of solar cells. A screen plate generally includes a screen frame and a screen mesh stretched within the screen frame. Conductive paste is poured onto the screen plate, and a squeegee is used to drive the conductive paste to move on the screen mesh, so that the conductive paste passes through the mesh holes on the screen mesh and is extruded onto the solar cell to form corresponding patterns on the solar cell to form the electrodes of the solar cell.

[0003] In the prior art, for knotless screen plates or screen meshes, generally, ink-receiving areas are formed on a metal film by laser cutting; furthermore, a knotless screen plate or screen mesh is prepared by an electroplating process. However, the strength of the screen plate or screen mesh formed by the electroplating process is insufficient, resulting in a short service life of the screen plate or screen mesh. Moreover, the toughness of the screen plate or screen mesh formed by the electroplating process in the prior art is not enough, and it is easy to break during the process of preparing the printing screen plate and causing the screen to burst. Therefore, there is an urgent need to provide a new knotless metal screen mesh to solve at least one technical problem in the prior art. Summary of the Invention

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

[0005] One technical solution of this application is:

[0006] A knotless metal screen mesh includes at least a first metal layer, and a plurality of first grid line areas are provided on the first metal layer. It is characterized in that the first metal layer is composed of at least 50% nickel, and the content of nickel is not more than 97%.

[0007] In one embodiment, 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.

[0008] In one embodiment, it further includes a second metal layer, and a plurality of second grid line areas are 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.

[0009] In one embodiment, 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.

[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 materials is not more 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. An electric current is applied to the first metal layer 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. The electroplating solution in the electroplating process includes at least 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.

[0015] A screen plate, characterized in that it includes a screen frame, a screen cloth, a mask, and the knotless metal mesh as described in any one of the above. The knotless metal mesh is fixed to the screen frame through the screen cloth.

[0016] Advantages of this application: In the metal mesh provided in this application, at least one metal layer provided with a grid line area uses nickel and other metals. Among them, the content of other metals is not less than 3%, and one or more metals can be mixed in the nickel. In this way, the prepared metal mesh can have sufficient toughness and screen tension strength, effectively improving the service life of the metal mesh; when the metal mesh has a two-layer structure, the metal material of the second metal layer is mainly nickel, preferably pure nickel, which can well improve the ductility of the metal mesh and enhance its wear resistance and corrosion resistance. Description of the Drawings

[0017] Figure 1 It is a schematic diagram of a printing screen plate of this application;

[0018] Figure 2 It is a schematic structural diagram of a knotless metal mesh of this application;

[0019] Figure 3 For this application Figure 2 It is a schematic cross-sectional structural diagram of the knotless metal mesh;

[0020] Figure 4 It is another schematic structural diagram of the knotless metal mesh of this application;

[0021] Figure 5 For this applicationFigure 4 Schematic cross-sectional structure diagram of a knotless metal mesh. Specific embodiments

[0022] To facilitate the understanding of the present application, the present application will be described more comprehensively with reference to the relevant drawings. Preferred embodiments of the present application are shown 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, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[0023] It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate 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 embodiments.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in the specification of this application herein 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 of the related listed items.

[0025] A knotless metal mesh at least includes a first metal layer, and a plurality of first grid line areas are provided on the first metal layer. The knotless metal mesh is mainly used for preparing grid line electrodes on the surface of a solar cell; the grid line electrodes on the surface of the solar cell mainly include fine grid electrodes arranged in parallel and main grid electrodes perpendicular to the fine grid electrodes, so that the electric quantity converted by the solar cell 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 content of nickel is not more than 97%, so there are other substances in the first metal layer. Of course, the other substances are preferably metal materials. For example, in one embodiment, the first metal layer at least further contains one or more of the metal materials cobalt, copper, manganese, iron, and chromium. The total content of the metal materials is not more than 50% and not less than 3%.

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

[0027] In one embodiment, 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; at this time, it is a metal mesh film of a single metal layer, which can also be called a metal mesh screen. In this way, the first metal layer is set in a grid shape, and the grid width of the first grid line area is greater than that of other areas. In this way, when the metal mesh film is used in cooperation with the PI film, the PI film can be better laser-etched in the first grid line area. At this time, the laser-etched grid spaces on the PI film correspond to the first grid line area.

[0028] In one embodiment, 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; the second metal layer is superimposed on the first metal layer. 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 is connected to the second grid line area. The nickel content in the second metal layer is generally greater than the nickel content of the first metal layer. Preferably, the nickel content of the second metal layer is greater than 99%, which is basically pure nickel. In this way, the metal mesh film will have certain toughness and corrosion resistance while having a certain strength, which can greatly improve the service life of the metal mesh film.

[0029] Among them, the second metal layer can be in a grid shape. When the second metal layer is in a grid shape, the non-grid line area of the first metal layer is a solid metal, so that it is easier to prepare a grid on the surface of the second metal layer.

[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 the seed layer in the electroplating process. Electric current is applied to the first metal layer, and the second metal layer grows on its surface. In one embodiment, the electroplating solution for preparing the second metal layer at least includes nickel sulfamate and nickel chloride.

[0031] In one embodiment, 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 also includes one or more combinations of cobalt sulfamate, ferrous sulfamate, ferrous chloride, manganese salt solution, chromic anhydride solution, and copper salt solution.

[0032] A screen plate includes a screen frame, a screen cloth, a mask, and the knotless metal mesh film described in any one of the above. The knotless metal mesh film is fixed to the screen frame through the screen cloth.

[0033] Please refer to Figure 1As shown in the figure, a stencil includes a metal mesh 10, a mesh cloth 20, and a metal frame 30. The metal mesh 10 is connected to the metal frame 30 through the mesh cloth. With this stencil, grid electrodes can be printed on solar cells. Of course, this stencil can also be applied in other fields, such as biomedicine, semiconductors, etc.

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

[0035] Please refer to Figure 4 and Figure 5 , another partial enlarged view of a knotless metal mesh. The metal mesh 10 includes a grid line area 104 and a non-grid line area 103. The grid line area 104 is composed of the superposition of a first grid line area and a second grid line area, and the first grid line area and the second grid line area are connected and arranged; as can be seen from Figure 5 , the metal mesh 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 superposed to form the non-grid line area 103. As can be seen from Figure 5 , the non-grid line area 103 is not in a grid shape but is a metal sheet. Among them, the material preferably used for the first metal layer 103b is a nickel alloy. Among them, 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 103b is preferably a nickel-containing metal with more than 97%, and at least it is necessary to ensure that the nickel content in the second metal layer is greater than or equal to the nickel content in the first metal layer.

[0036] In order to make the above objects, features, and advantages of the present application more obvious and understandable, the specific implementation manners of the present application are described in detail above in conjunction with the accompanying drawings. Many specific details are set forth in the above description 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 departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed above. Moreover, the technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0037] The above-described embodiments merely represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A knotless metal mesh, comprising at least a first metal layer, wherein a plurality of first grid line areas are provided on the first metal layer, and 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 mesh according to claim 1, characterized in that, 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, characterized in that, 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, wherein 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, wherein The second metal layer is formed on the surface of the first metal layer by electroplating, and the first metal layer is used as the seed layer in the electroplating process. 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 wire 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 further includes 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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