Preparation method of flexible substrate base plate and preparation method of flexible OLED (organic light emitting diode) display

Abstract

The invention relates to a preparation method of a flexible substrate base plate and a preparation method of a flexible OLED (organic light emitting diode) display, wherein the preparation method of the flexible substrate base plate comprises the following steps of providing a hard carrier base plate; forming an organic substrate layer on the hard carrier base plate, wherein the organic substrate layer is of a pattern structure and comprises a plurality of mutually separated organic substrate patterns, and each organic substrate pattern corresponds to one screen body region; forming an inorganic blocking layer on the organic substrate layer, wherein the inorganic blocking layer is of an integral surface structure, simultaneously covers the plurality of organic substrate patterns and covers the peripheral side walls of each organic substrate pattern, so that the flexible substrate base plate is prepared. In the preparation method of the flexible substrate base plate, the peripheral side wall of each organic substrate pattern (corresponding to each screen body) is covered by the inorganic blocking layer; the water and oxygen blocking capability of the front side and the lateral side of the flexible substrate base plate can be greatly improved; the water and oxygen blocking performance of the side surface of the flexible display screen body can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of flexible displays, in particular to a method for preparing a flexible substrate substrate and a flexible OLED display. Background technique [0002] Organic Light-Emitting Diode (English full name Organic Light-Emitting Diode, referred to as OLED) is an active light-emitting device, which has the advantages of high contrast, wide viewing angle, low power consumption, fast response speed, and thinner volume. It is expected to become the next generation of mainstream flat panel display technology. Moreover, the most attractive feature of organic light-emitting diodes is that they can be flexible. Specifically, organic light-emitting diodes are made on flexible substrates. These flexible substrates can make organic light-emitting diodes bend and can be rolled into arbitrary shapes. [0003] Different from traditional flat panel display devices, the substrate materials used in flexible AMOLED (active matrix o...

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Problems solved by technology

[0003] Different from traditional flat panel display devices, the substrate materials used in flexible AMOLED (active matrix organic light-emitting diode) mainly include ultra-thin glass, metal thin film and organic polymer. Among them, the combination of ultra-thin glass and metal thin film Water and oxygen barrier properties are good, but ultra-thin glass is poor in flexibility, brittle, and very sensitive to crack defects; metal thin films have poor transparency and high surface roughness, requiring additional planarization processes, which limit the relationship between ultra-thin glass and Application of Metal Thin Films in the Field of Flexible OLEDs

[0004] Compared with glass and metal, polymer materials (such as PET, PEN, PC, PI, etc.) have the advantages of better flexibility, lighter weight, and higher impact resistance, and are more suitable as substrate materials for flexible AMOLEDs. However, polymer materials There are also defects: its barrier properties to water and oxygen in the air are poor, and water and oxygen can easily penetrate into the display device to decompose the OLED material, reducing the service life of the display

As mentioned above, although ultra-thin glass and metal films have good water and oxygen barrier properties, both ultra-thin glass and metal films have their own obvious defects, which limit the application of ultra-thin glass and metal films in the field of flexible OLEDs

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