CMM mesh structure for OLED

Abstract

The utility model discloses a CMM mesh structure for an OLED, which comprises a frame and is characterized in that a mesh is fixed on the frame and comprises a plurality of first metal strips and second metal strips which are distributed in a crossed manner, the upper surfaces of the first metal strips are flush with the upper surfaces of the second metal strips, and the upper surfaces of the first metal strips are parallel to the upper surfaces of the second metal strips. The lower surfaces of the first metal strips are flush with the lower surfaces of the second metal strips, and the crossed and stacked positions of the first metal strips and the second metal strips are connected together. The problem that an existing mesh structure is prone to drooping is solved, the first metal strips and the second metal strips are positioned by arranging the buckling grooves, and therefore the mesh structure is not prone to falling; the first metal strip and the second metal strip are straightened and welded together at the crossed and stacked positions of the first metal strip and the second metal strip, so that the situation that the metal strips droop is reduced, and the connection strength between the upper metal strip and the lower metal strip is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of vapor deposition equipment in large-size OLED screen manufacturing equipment, in particular to a CMM mesh structure for OLED. Background Art

[0002] OLED screens are mainly made by using a vapor deposition machine to heat and vaporize organic light-emitting particles in a low-vacuum cavity and attach them to a glass substrate. Among them, there is a component called CMM, also known as Open Mask, which is in the shape of a thin sheet with regularly arranged grid-shaped holes inside. Its function is mainly to vaporize and deposit common film layers in the vapor deposition structure, such as HIL, HTL, EIL, and ETL. This component is fixed to the metal mask frame by laser spot welding. In order to ensure production quality, it has high requirements for verticality, stretching accuracy, thermal deformation, etc.

[0003] In the panel manufacturing industry, the technical specifications of production lines are generally classified using names such as 5.5th generation, 6th generation, and 8.7th generation, which mainly reflect the maximum size of the glass substrate used in the production line. However, due to the significant increase in size, larger materials are required for processing. When the size increases from 1700*1100 in the 6th generation to 2290*2620 in the 8.7th generation, the requirements for various components on it increase exponentially.

[0004] For 6th generation or below meshes, generally very thin integral low thermal expansion coefficient metal Invar alloy is used for processing. The thickness of such sheet is generally 0.1 mm. Because the sheet is very easy to deform, the internal mesh openings for evaporation through organic light-emitting particles are generally processed by chemical etching. When the size is expanded to 8.7th generation products, the area increases significantly, which exceeds the production range of material suppliers in the industry. It is impossible to directly purchase metal sheets of this size. Even if more investment is made to customize special sizes to make sheets, the scale of etching equipment will increase during subsequent etching processing, requiring extremely high equipment costs. In the etching process, a large amount of liquid medicine will inevitably be wasted, which will lead to continued high costs and loss of product competitiveness.

[0005] The current solution in the industry is to split the entire 8.7 generation product grid CMM during design, such as Figure 7 As shown, multiple metal strips with vapor deposition openings are made in columns or rows, which is convenient for processing and precision control. They are then spliced ​​when used. Usually, each column of openings is taken as a whole, aligned and pressed against each other, and tensioned outwards using clamps. After tensioning, they are welded to the mask frame. This solution can effectively solve the problem of difficulty in purchasing corresponding raw materials, such as Figure 8As shown, however, each open horizontal bar has a force direction that is perpendicular to the pulling force, and thus, the horizontal bar is basically unable to bear the force and will sag, which seriously affects the yield rate. Therefore, the CMM mesh structure is designed to solve the problem of horizontal bar sagging. Utility Model Content

[0006] The purpose of the utility model is to provide a CMM mesh structure for OLED, by setting buckle grooves, positioning the positions of the first metal bar and the second metal bar, straightening the first metal bar and the second metal bar, and welding the first metal bar and the second metal bar together on the back side of the buckle groove, thereby enhancing the connection strength between the first metal bar and the second metal bar, reducing the sagging of the metal bar, and further improving the production quality.

[0007] The utility model provides the following technical solution: a CMM mesh structure for OLED, comprising a frame, a mesh fixed on the frame, the mesh comprising a plurality of cross-distributed first metal strips and a second metal strip, the upper surface of the first metal strip is flush with the upper surface of the second metal strip, the lower surface of the first metal strip is also flush with the lower surface of the second metal strip, and the cross-stacked parts between the first metal strips and the second metal strips are connected together.

[0008] In order to position and connect the first metal strip and the second metal strip, buckle grooves are provided on the contact surfaces of the first metal strip and the second metal strip, and the first metal strip and the second metal strip are positioned by buckling the buckle grooves, and the first metal strip and the second metal strip are welded together.

[0009] In order to facilitate the connection between the first metal strip and the second metal strip, the buckle grooves are all rectangular grooves, and the first metal strip and the second metal strip are distributed in a vertical array.

[0010] In order to enhance the rigidity and strength of the metal strip and reduce the deformation of the metal strip, the depth of the buckle groove is half the height of the first metal strip or the second metal strip.

[0011] In one embodiment, the first metal strips are located at the upper end of the second metal strip, the buckle groove of the first metal strip is opened on the lower surface of the first metal strip, and the buckle groove of the second metal strip is opened on the upper surface of the second metal strip.

[0012] In another embodiment, the first metal strip is sequentially distributed on the second metal strip at intervals up and down, the second metal strip is also sequentially distributed on the first metal strip at intervals up and down, and the buckle grooves are sequentially distributed on the first metal strip and the second metal strip at intervals up and down.

[0013] Compared with the prior art, the beneficial effects achieved by the utility model are:

[0014] (1) By providing a buckle groove, the first metal bar and the second metal bar are positioned by using the buckle groove, the first metal bar and the second metal bar are straightened, and the first metal bar and the second metal bar are welded together on the back of the buckle groove, thereby enhancing the connection strength between the first metal bar and the second metal bar, reducing the sagging of the metal bar, and further improving the production quality;

[0015] (2) The buckle grooves are all rectangular holes, and the depth is half the height of the metal bar, so that the upper and lower metal bars have the same rigidity and strength, further ensuring that the metal bars are evenly stressed and reducing the occurrence of distortion. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the explosion structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the connection structure of the first metal strip and the second metal strip of the utility model;

[0020] Figure 4 yes Figure 3 A partial enlarged schematic diagram of the middle A area;

[0021] Figure 5 It is an overall three-dimensional diagram of another embodiment of the utility model;

[0022] Figure 6 is a structural diagram of a first metal strip or a second metal strip in another embodiment of the utility model;

[0023] Figure 7 It is a CMM mesh structure diagram in the prior art;

[0024] Figure 8 It is the force diagram of the CMM mesh in the prior art;

[0025] In the figure: 1. frame; 2. first metal strip; 3. second metal strip; 4. buckle groove; 5. welding point. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Embodiment 1

[0028] See also Figures 1 to 4 The utility model provides a technical solution: a CMM mesh structure for OLED, including a frame 1, a mesh fixed on the frame 1, the mesh including a plurality of cross-distributed first metal strips 2 and second metal strips 3, the upper surface of the first metal strip 2 is flush with the upper surface of the second metal strip 3, and the lower surface of the first metal strip 2 is also flush with the lower surface of the second metal strip 3, so that the surfaces of the first metal strip 2 and the second metal strip 3 are flush, so that the metal strips will not bulge and will not affect the upper substrate closely attached thereto, the first metal strip 2 and the second metal strip 3 are straightened, so that the metal strips will not sag excessively, and then the cross-stacked parts between the first metal strip 2 and the second metal strip 3 are welded together, so as to enhance the connection strength between the first metal strip 2 and the second metal strip 3, so that the vapor deposition opening will not be twisted and deformed, the vapor-deposited size is accurate, and the quality is guaranteed.

[0029] like Figure 3 and 4 As shown, buckle grooves 4 are provided on the contact surfaces of the first metal strip 2 and the second metal strip 3. The first metal strip 2 and the second metal strip 3 are positioned by buckling the buckle grooves 4 so that the first metal strip 2 and the second metal strip 3 remain relatively fixed. At the same time, a welding spot 5 is generated at the cross-stack of the first metal strip 2 and the second metal strip 3 using a welding gun. When welding the welding spot, the welding workload is small because the number of overlaps is small. During the welding process, the welding deformation can be monitored at any time, and the size can be compensated by online measurement so that the deformation of the metal strip is within a controllable range. At the same time, the setting of the welding spot 5 enhances the connection strength between the metal strips, reduces the distortion and deformation of the vapor deposition opening, and makes the size of the vapor deposition accurate.

[0030] The buckle grooves 4 are all rectangular grooves, and the first metal strips 2 and the second metal strips 3 are distributed in a vertical array, so that the first metal strips 2 and the second metal strips 3 are easy to install and position.

[0031] The depth of the buckle groove 4 is half the height of the first metal strip 2 or the second metal strip 3, so that the rigidity of the first metal strip 2 or the second metal strip 3 is the same, so that the metal strips are evenly stressed, further reducing the occurrence of distortion.

[0032] like Figure 3As shown, the first metal strips 2 are located at the upper end of the second metal strips 3, the buckle grooves 4 of the first metal strips 2 are opened on the lower surface of the first metal strips 2, and the buckle grooves 4 of the second metal strips 3 are opened on the upper surface of the second metal strips 3, which further facilitates the buckling of the first metal strips 2 on the second metal strips 3 and improves the installation efficiency.

[0033] Embodiment 2

[0034] like Figure 5 and 6 As shown, in this embodiment, other structures are the same as those in the first embodiment, except that the first metal strip 2 is sequentially distributed on the second metal strip 3 at intervals up and down, and the second metal strip 3 is also sequentially distributed on the first metal strip 2 at intervals up and down, and the buckle grooves 4 are sequentially distributed on the first metal strip 2 and the second metal strip 3 at intervals up and down, so that the forces on the first metal strip 2 and the second metal strip 3 are distributed at intervals, thereby improving the connection strength between the two. At the same time, the first metal strip 2 and the second metal strip 3 can support each other to further prevent sagging.

[0035] Production process: the metal strip is straightened under the specified size and pre-tension, and the laser welding machine is used to spot weld the metal strip at the corresponding position of the metal mask frame. The upper buckle groove and the lower buckle groove in the stacking area of ​​the upper metal strip and the lower metal strip are matched one by one, and then the whole is turned over to the back, and the laser welding machine is used to weld the first metal strip and the second metal strip together. The predetermined position is reached through the designed positioning function, and the welding head is 5 mm away from the surface of the product. The power is increased to 0.8 kilowatts within 0.5ms, and the mesh is continuously welded for 1ms. After that, the power is reduced and leaves the product for 0.5ms. According to this operation, all welds are laser spot welded, and the product can be completed, which enhances the tension of the first metal strip or the second metal strip to prevent sagging.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A CMM mesh structure for OLED, including a frame, characterized in that: A mesh is fixed on the frame, and the mesh includes a plurality of cross-distributed first metal strips and second metal strips, the upper surface of the first metal strip is flush with the upper surface of the second metal strip, the lower surface of the first metal strip is also flush with the lower surface of the second metal strip, and the cross-stacked parts between the first metal strips and the second metal strips are connected together.

2. The CMM mesh structure for OLED according to claim 1, characterized in that: Buckle grooves are provided on the contact surfaces of the first metal strip and the second metal strip. The first metal strip and the second metal strip are positioned by buckling the buckle grooves. The first metal strip and the second metal strip are welded together.

3. The CMM mesh structure for OLED according to claim 2, characterized in that: The buckle grooves are all rectangular grooves, and the first metal strips and the second metal strips are distributed in a vertical array.

4. The CMM mesh structure for OLED according to claim 3, characterized in that: The depth of the buckle groove is half of the height of the first metal strip or the second metal strip.

5. The CMM mesh structure for OLED according to claim 4, characterized in that: The first metal strips are all located at the upper end of the second metal strip, the buckle grooves of the first metal strips are arranged on the lower surface of the first metal strips, and the buckle grooves of the second metal strips are arranged on the upper surface of the second metal strips.

6. The CMM mesh structure for OLED according to claim 4, characterized in that: The first metal strips are sequentially distributed on the second metal strip at intervals up and down, the second metal strips are also sequentially distributed on the first metal strip at intervals up and down, and the buckle grooves are sequentially distributed on the first metal strip and the second metal strip at intervals up and down.

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