Pixel limit layer, production method thereof, OLED substrate and production method thereof

Abstract

The invention provides a pixel limit layer, a production method thereof, an organic electroluminescent diode substrate and a production method thereof and belongs to the technical field of display. The production method of the pixel limit layer includes: forming a first film layer on a substrate, and forming a latticed second film layer through ink-jet printing, wherein the first film layer is located on the second film layer; removing the first film layer corresponding to the hollow-out positions of the latticed second film layer, and exposing the lateral edges, at the hollow-out positions, of the second film layer to form the pattern of the pixel limit layer. The production method of the pixel limit layer has the advantages that the second latticed film layer below the first film layer is directly formed through the ink-jet printing, the first film layer corresponding to the hollow-out positions of the latticed second film layer is removed to form the pattern of the pixel limit layer, that is to say, the pattern of the pixel limit layer can be formed by the one-step pattern forming process, and the production process is simplified.

Description

technical field [0001] The invention belongs to the field of display technology, and in particular relates to a pixel defining layer and a preparation method thereof, an organic electroluminescent diode substrate and a preparation method thereof. Background technique [0002] An organic light emitting diode (OLED, Organic Light Emitting Diode) is an organic thin film electroluminescent device, which has the advantages of simple preparation process, low cost, high luminous efficiency, and easy formation of a flexible structure. Therefore, a display technology utilizing organic electroluminescent diodes has become an important display technology. [0003] In the prior art, for organic thin-film electroluminescent devices, the methods for forming the organic electroluminescent layer include: 1. Vacuum evaporation method, which is suitable for small organic molecules, and is characterized in that the formation of the organic electroluminescent layer does not require a solvent, ...

AI Technical Summary

Problems solved by technology

[0005] The inventors have found that there are at least the following problems in the prior art: the preparation of the pixel defining layer of the two-layer structure needs to be completed in two steps, the steps are cumbersome, and different equipment needs to be invested, especially when it comes to affinity materials, especially inorganic affinity materials When using plasma enhanced chemical vapor deposition (PECVD), the equipment is expensive

In addition, delamination is prone to occur due to interface problems between organic and inorganic materials

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