Mask strip structure for special-shaped screen and manufacturing method of mask strip structure

Abstract

The mask strip structure comprises a metal mask strip body, U-shaped grooves with outward openings are formed in the middles of the two ends of the metal mask strip body, and a plurality of sets of etching areas distributed at equal intervals are arranged on the surface of the metal mask strip body. The etching area comprises an effective area which is circularly arranged and a buffer area which is positioned on the outer side of the effective area and is rectangularly arranged. A double-sided etching process is adopted in the effective area, and after double-sided etching is conducted on the metal mask strip body, through holes are formed. A double-face etching and single-face filling technology is adopted in the buffer area, and a groove etched in the front face of the buffer area is filled with a barrier layer of 1-3 microns. According to the metal mask strip, the net stretching yield of the metal mask strip body for the special-shaped screen can be increased, the net stretching efficiency is improved, the phenomenon of uneven stress of the special-shaped screen is relieved through the structure of the metal mask strip body, the wrinkle problem 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 special-shaped screens, and in particular relates to a mask strip structure for special-shaped screens and a manufacturing method 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 ...

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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