Mask strip structure for special-shaped screen and manufacturing process thereof

Abstract

The invention discloses a mask strip structure for a special-shaped screen and a manufacturing process thereof. The mask strip structure comprises a mask strip plate, the mask strip plate is provided with a plurality of groups of effective areas distributed at equal intervals, the effective areas are quartz photomasks, the outer sides of the effective areas are provided with surrounding layers, the surrounding layers are etching areas, the etching areas are arranged in a rectangular shape, buffer areas are arranged between the effective areas and the corresponding etching areas, a plurality of groups of through holes are uniformly distributed in the effective areas, and a plurality of groups of non-through holes are uniformly distributed in the buffer areas. According to the mask strip structure, the net stretching yield of the mask strip plate for the special-shaped screen can be improved, and the net stretching efficiency is improved; and according to the structure of the mask strip plate, the phenomenon of uneven stress of the special-shaped screen is relieved, the problem of wrinkles is solved, the color mixing risk is reduced, and the color mixing phenomenon is improved.

Description

technical field [0001] The invention belongs to the technical field of OLED display panels, and in particular relates to a mask strip structure for special-shaped screens and a manufacturing process thereof. Background technique [0002] The OLED display panel has the advantages of thin thickness, low power consumption, bendable and flexible display, and has become the development trend of the next generation panel display in recent years. [0003] Existing OLED panels use an evaporation source to heat and evaporate organic materials in a vacuum environment. The organic materials pass through the openings on the metal mask strips to form an organic film on the surface of the substrate. The film-forming position must be specified on the substrate. The light-emitting position and the current of the substrate can be effectively transmitted to the OLED device to emit light, so the metal mask strip must have high position accuracy and stability, and it must be closely attached to...

AI Technical Summary

Problems solved by technology

When developing special-shaped screens (circle, rhombus, etc.), the effective area of ​​the mask strip needs to be designed as a special shape (circle, rhombus, etc.), and there will be arcs or vertices on both sides of the effective area, that is, the tension at both ends is Different tension effects will be produced when applied, and the force on the edge of the effective area will be uneven, and problems such as effective area deformation, position offset, and wrinkles will easily occur, which directly affects the color mixing yield. This is also one of the difficulties in the development of special-shaped screens.

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