A stencil for improving the saddle shape of Frit glue

Abstract

The present invention discloses a screen printing plate for improving the saddle shape of Frit glue, which includes an aluminum frame. A wire mesh, a photosensitive emulsion layer and several groups of printing panels are arranged inside the aluminum frame. The photosensitive emulsion layer is laid on the wire mesh, and several groups of printing panels are evenly arranged on the photosensitive emulsion layer. Several groups of panel glue-penetrating areas are made on the several groups of printing panels through the process of exposure and development. The present invention optimizes the arrangement density of the mesh number (number of meshes), reduces the glue height at the corresponding positions on both sides, and improves the glue height uniformity; by improving the glue height uniformity, poor welding and accompanying water and oxygen intrusion are avoided, and the welding yield is improved. The present invention mainly adjusts the glue height uniformity by changing the arrangement density of the mesh number at the corresponding positions of the saddle shape, so as to improve the encapsulation welding yield.

Description

Technical Field

[0001] The present invention relates to the technical field of Frit glue screen printing, and specifically to a screen plate for improving the saddle shape of Frit glue. Background Art

[0002] During the Frit glue screen printing process, the uniformity of the glue height is very important and is closely related to the yield of laser welding. In the existing Frit glue screen printing process, as Figure 1 、 Figure 2 shown, there is a phenomenon of a saddle-shaped appearance of the glue height during the measurement of the glue height, that is, the Frit glue in the middle position of a section of glue is lower and the two sides are higher. The uneven glue height affects the encapsulation effect of the OLED hard board and is likely to cause poor welding effect and water and oxygen intrusion. Therefore, we introduce a screen plate for improving the saddle shape of Frit glue. Summary of the Invention

[0003] The purpose of the present invention is to provide a screen plate for improving the saddle shape of Frit glue to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A screen plate for improving the saddle shape of Frit glue, including an aluminum frame. A wire mesh, a photosensitive emulsion layer, and several groups of printing panels are arranged inside the aluminum frame. The photosensitive emulsion layer is laid on the wire mesh, and several groups of printing panels are evenly arranged on the photosensitive emulsion layer. Several groups of panel glue-penetrating areas are made on the several groups of printing panels through the process of exposure and development.

[0005] We can adjust the glue height by adjusting the design of the mesh number so that the glue height can be evenly maintained at about 16.27 μm after adjustment.

[0006] There is Solution ①, as Figure 7 , shown in the simple figure 8, when preparing the wire mesh stretching and arranging, in the panel glue-penetrating area, at the position corresponding to the convex part of the saddle shape (both sides of the glue height), the mesh number can be increased. It is recommended that the mesh number can be increased from 400 / inch to 450 / inch, that is, the number of mesh eyes per inch increases, making the mesh eye size smaller, so as to reduce the glue height on both sides of the saddle shape and achieve the purpose of uniform glue height.

[0007] Or there is Solution ②. Similarly, the mesh number at the position corresponding to the concave part of the saddle shape (the middle of the glue height) can be reduced. It is recommended that the mesh number can be reduced from 400 / inch to 350 / inch, that is, the number of mesh eyes per inch decreases, making the mesh eye size larger, so as to increase the glue height in the middle of the saddle shape and achieve the purpose of uniform glue height.

[0008] Compared with the prior art, the beneficial effects of the present invention are as follows: By optimizing the arrangement density of the mesh number (the number of meshes), the glue height at the corresponding positions on both sides is reduced, and the uniformity of the glue height is improved; by improving the uniformity of the glue height, poor welding and the accompanying water and oxygen intrusion are avoided, and the welding yield is increased. The present invention mainly adjusts the uniformity of the glue height by changing the arrangement density of the mesh number at the corresponding positions of the saddle shape, so as to improve the encapsulation welding yield. Brief Description of the Drawings

[0009] Figure 1 It is a schematic diagram of the Frit glue measurement structure;

[0010] Figure 2 It is a schematic diagram of the saddle shape of the glue height;

[0011] Figure 3 It is a schematic diagram of the OLED printing screen structure of the present invention;

[0012] Figure 4 For the present invention Figure 3 The enlarged schematic diagram of the mesh structure at B in it;

[0013] Figure 5 It is a schematic diagram of the panel permeable glue area structure in the common screen printing mesh;

[0014] Figure 6 For Figure 5 The enlarged structure schematic diagram at C in it;

[0015] Figure 7 It is a schematic diagram of the panel permeable glue area structure in the screen of the present invention;

[0016] Figure 8 For the present invention Figure 7 The enlarged schematic diagram at D in it.

[0017] Figure 9 It is a schematic diagram of the relationship between the mesh size and the mesh number, namely formula 1.1;

[0018] Figure 10 It is a schematic diagram of the relationship between the wet glue height and the mesh size, namely formula 1.2.

[0019] In the figure: 1. Screen; 2. Photosensitive emulsion layer; 3. Printed panel; 4. Panel permeable glue area; 5. Glass; 6. Frit glue; 7. Mesh; 8. Aluminum frame. Detailed Embodiments

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] Figure 1 Several groups of Frit adhesives 6 are provided on the glass 5 in Figure 1 , Figure 2 As shown, there is a phenomenon of a saddle-shaped appearance of the adhesive height during the measurement of the adhesive height ( Figure 1 The arrow direction at point A in is the adhesive height measurement direction), that is, the Frit adhesive in the middle position of a section of the adhesive is low and high on both sides. The uneven adhesive height affects the encapsulation effect of the OLED hard board, and easily leads to poor welding effect and water and oxygen intrusion phenomenon.

[0022] Please refer to Figure 3 , Figure 4 , Figure 7 and Figure 8 , the present invention provides a technical solution: a screen plate for improving the saddle shape of Frit adhesive, including an aluminum frame 8. A wire mesh 1, a photosensitive emulsion layer 2, and several groups of printing panels 3 are provided inside the aluminum frame 8. The photosensitive emulsion layer 2 is laid on the wire mesh 1, and several groups of printing panels 3 are evenly arranged on the photosensitive emulsion layer 2. Several groups of panel permeable adhesive areas 4 are made on the several groups of printing panels 3 through the process of exposure and development.

[0023] Figure 3 The arrow direction at point A in is the adhesive height measurement direction, Figure 4 is the mesh hole 7 that makes up the grid. Currently, the arrangement of the mesh holes 7 in the wire mesh of the commonly used screen plate is equidistant, that is, the size of each mesh hole 7 is the same. As Figure 5 , Figure 6 can be seen, in the panel permeable adhesive area 4, the mesh holes 7 of the wire mesh 1 are all equidistant.

[0024] The main invention point of the present invention is to change the adhesive height by changing the number of meshes (mesh holes) of the printing panel 3 corresponding to the saddle shape, so that the adhesive height of the entire panel edge is relatively uniform, and the saddle shape phenomenon is improved.

[0025] In the preparation of the existing screen plate, the concept of the number of meshes is pointed out, which refers to the number of mesh holes per inch in the screen plate.

[0026] As Figure 9 in Formula 1.1, the currently commonly used screen plate mesh number (number of mesh holes) is 400 / inch, and the wire diameter is 23μm, so the size of the mesh hole 1 can be obtained as 40.5um.

[0027] As Figure 10 in Formula 1.2, the commonly used screen mesh thickness is 40 μm and the wire diameter is 23 μm currently. The wet glue height can be obtained as (40.5²×40) / (40.5 + 23)² = 16.27 μm.

[0028] It can be obtained from Formula 1.1 that the more the number of meshes, the smaller the mesh size. It can be obtained from Formula 1.2 that the smaller the mesh size, the lower the glue height. Therefore, the glue height can be reduced by increasing the number of meshes. Thus, the present invention mainly adjusts the glue height uniformity by changing the density of the mesh number arrangement at the corresponding positions of the saddle shape.

[0029] It can be obtained from the two formulas that we can adjust the glue height by adjusting the design of the mesh number (number of meshes) so that the glue height can be evenly maintained at about 16.27 μm after adjustment.

[0030] There is Scheme ①. As Figure 7 shown in the simple diagram of FIG. 8, when preparing the screen mesh stretching arrangement, in the panel glue-penetrating area 4, at the corresponding protruding positions of the saddle shape (both sides of the glue height), the mesh number (number of meshes) can be increased. It is recommended that the mesh number (number of meshes) can be increased from 400 / inch to 450 / inch, that is, the mesh number (number of meshes) of the grid in the panel glue-penetrating area 4 is 450 / inch. The increase in the number of meshes per inch makes the mesh 7 size smaller, so as to reduce the glue height on both sides of the saddle shape and achieve the purpose of glue height uniformity.

[0031] Or there is Scheme ②. Similarly, the mesh number (number of meshes) at the corresponding concave positions of the saddle shape (the middle of the glue height) can be reduced. It is recommended that the mesh number (number of meshes) can be reduced from 400 / inch to 350 / inch, that is, the mesh number (number of meshes) of the grid in the panel glue-penetrating area 4 is 350 / inch. The decrease in the number of meshes per inch makes the mesh 7 size larger, so as to increase the glue height in the middle of the saddle shape and achieve the purpose of glue height uniformity.

[0032] The present invention optimizes the arrangement density of the mesh number (number of meshes), reduces the glue height at the corresponding positions on both sides, and improves the glue height uniformity; by improving the glue height uniformity, the poor welding and the accompanying water and oxygen intrusion are avoided, and the welding yield is improved. The present invention mainly adjusts the glue height uniformity by changing the density of the mesh number arrangement at the corresponding positions of the saddle shape to improve the encapsulation welding yield.

[0033] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A stencil for improving the saddle shape of Frit glue, comprising an aluminum frame (8), characterized in that: The aluminum frame (8) is provided with a wire mesh (1), a photosensitive emulsion layer (2), and several groups of printing panels (3). The photosensitive emulsion layer (2) is laid on the wire mesh (1), and several groups of printing panels (3) are evenly arranged on the photosensitive emulsion layer (2). Several groups of panel permeable glue areas (4) are made on the several groups of printing panels (3) through the process of exposure and development. In the panel permeable glue area, the number of meshes at the position corresponding to the saddle-shaped convex part is increased from 400 / inch to 450 / inch, or the number of meshes at the position corresponding to the saddle-shaped concave part is decreased from 400 / inch to 350 / inch, so that the glue height of the whole panel edge is relatively uniform.

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