Mask

Abstract

The invention discloses a mask. The mask comprises a mask pattern region and a non-mask pattern region located at the periphery of the mask pattern region; the boundary between the mask pattern regionand the non-mask pattern region is a non-linear type geometric figure, and the geometric figure is sunken towards the mask pattern region; and a fixing region is arranged in the non-mask pattern region, the fixing region is used for fixing the mask, and the geometric figure is positioned on the opposite surface of the fixing region.

Description

technical field [0001] The present disclosure generally relates to the field of mask technology, and in particular, to a mask plate. Background technique [0002] As an emerging display and lighting technology, organic light-emitting diode (Qrganic Light-emitting Diode, OLED) has become a research hotspot. Generally, OLEDs are prepared by vacuum evaporation. To achieve different resolutions of the display screen, it is necessary to produce a corresponding number of pixels, and the pixels are composed of three sub-pixels of red, green, and blue, so three sub-pixels need to be produced separately, which requires the mask plate and the substrate collocation. [0003] In the evaporation process, the evaporation source will have a certain evaporation angle. At this time, it is required that the pixel opening of the mask plate has an angle less than or equal to the evaporation angle, so as to minimize the shadow (Shadow) and improve the deposition accuracy of the film layer. , ...

AI Technical Summary

Problems solved by technology

Especially with the improvement of resolution, the arrangement of pixel openings on the mask will become denser and smaller, and because of the angle limitation, the thickness of the mask becomes very thin

When the mask is stretched, applying force along the long side of the mask will easily cause the mask to wrinkle, bend or twist, reducing the precision of the stretching

Images