Metal mask plate and organic electroluminescent display device manufactured by metal mask plate

Abstract

The invention discloses a metal mask plate and an organic electroluminescent display device manufactured by the metal mask plate. The metal mask plate comprises a substrate, a first region arranged on the substrate and second regions arranged at the left and right sides of the first region respectively, wherein a plurality of parallel first strip slits which extend along the column direction and are mutually parallel are arranged in the first region, and at least three second strip slits which are mutually parallel to the first strip slits are arranged in each second region; at least two of the three conditions needs to be met: the width of each second strip slit is smaller than that of each first strip slit, a distance between two adjacent second strip slits in the same second region is smaller than that between two adjacent first strip slits, the width of each region at the side becomes narrow. According to the metal mask plate and the organic electroluminescent display device disclosed by the invention, when at least two conditions are met, the influence of a magnetic field on the second strip slits can be relieved, the second regions occupy little area, and narrow frame is realized in space.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a metal mask plate and an organic electroluminescent display device produced therefrom. Background technique [0002] At present, organic electroluminescent display devices (Organic Electroluminescent Display, OLED) have gradually become the mainstream in the display field due to their excellent performances such as low power consumption, high color saturation, wide viewing angle, thin thickness, and flexibility. [0003] Evaporation technology is a key technology in the manufacturing process of OLED displays. OLED mainly uses red, green, and blue three-color light-emitting layers to achieve better luminous efficiency, and evaporation technology is mainly used in the film-forming process of red, green, and blue three-color light-emitting layers of organic light-emitting materials. In the film forming process, a high-precision metal mask (Fine Metal Mask, FMM) is mainly used for...

AI Technical Summary

Problems solved by technology

In the OLED evaporation process, it is usually necessary to use a magnetic spacer to absorb the entire metal mask to improve the sagging of the metal mask. Figure 1a As shown, the metal mask composed of strip-shaped slits 001 is easily affected by the magnetic force of the magnetic partition 002 during the process of being adsorbed and moved upward by the magnetic partition 002, because the strip-shaped slits 001 in the metal mask The shortest distance m of the side frame 003 parallel to it is generally greater than the distance n between adjacent strip slits 001, and the generated magnetic force is large, resulting in the deformation of multiple strip slits 001 close to the side frame 003 , which is not conducive to the preparation of high-resolution OLED displays

Therefore, if Figure 1b As shown, at least three strip-shaped slits adjacent to the side frame need to be provided in the corresponding non-display area A, so that the strip-shaped slits corresponding to the display area B will not be deformed, but this limits the width of the OLED display frame

Images