Fabrication method, system and display substrate for OLED luminescent layer thin film

Abstract

The invention provides a method for manufacturing an OLED light-emitting layer film, a system and a display substrate, wherein, the method comprises the following steps: step S1, providing a substrateformed with a pixel bounding layer, wherein, the pixel bounding layer defines a first sub-pixel unit, a second sub-pixel unit and a third sub-pixel unit; Step S2, A first ink is injected into the first sub-pixel unit, The first ink is vacuum dried, and the first ink is irradiated with light through the opening of the mask in the vacuum drying, and the ink is injected into the second sub-pixel unit and the third sub-pixel unit according to the method of the first sub-pixel unit, and the ink is dried and irradiated with light, thereby forming an OLED light emitting layer film. At the same timeof vacuum drying, the invention irradiates the ink with infrared light through the opening of the mask plate, thereby increasing the drying speed of the ink at the center position of the sub-pixel andbalancing the drying speed of the center position and the edge position, thereby weakening the coffee ring phenomenon.

Description

technical field [0001] The invention relates to the technical field of display devices, in particular to a thin film manufacturing method, system and display substrate. Background technique [0002] In the fields of Organic Light Emitting Diode (OLED) and Liquid Crystal Display (LCD), inkjet printing is usually used to form organic functional layers or color filter structures. Inkjet printing requires vacuum drying and baking drying to remove excess solvent to form a dry film. Due to the influence of droplet tension and other factors, the central part of the droplet with a smaller volume and unit area and the edge with a larger volume and unit area The evaporation rate of the position is different, and the phenomenon of forming a coffee ring makes the morphology of the film relatively poor, and the uniformity is relatively poor, which has a relatively large impact on the life of the device and the display effect. Contents of the invention [0003] The technical problem to...

AI Technical Summary

Problems solved by technology

Inkjet printing requires vacuum drying and baking drying to remove excess solvent to form a dry film. Due to the influence of droplet tension and other factors, the central part of the droplet with a smaller volume and unit area and the edge with a larger volume and unit area The evaporation rate of the position is different, and the phenomenon of forming a coffee ring makes the morphology of the film relatively poor, and the uniformity is relatively poor, which has a relatively large impact on the life of the device and the display effect.

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