Flexible substrate and manufacturing method thereof

Abstract

The invention provides a flexible substrate and a manufacturing method thereof. The flexible substrate is divided into a first organic material layer (21) and a second organic material layer (22), the coverage area of the second organic material layer (22) on a carrier substrate (1) is larger than the coverage area of the first organic material layer (21) on the carrier substrate (1), the long edge of the second organic material layer (22) surrounds the long edge of the first organic material layer (21), so that the thickness of the edge of the flexible substrate is reduced, the etching residue at the edge can be avoided, the coverage area of the organic material on the carrier substrate is reduced, and the warpage of the flexible substrate is reduced. In addition, an aligning mark (3) is arranged on the second organic material layer (22) between the long edge of the second organic material layer (22) and the long edge of the first organic material layer (21), so that the aligning precision of the subsequent vapor plating processes can be guaranteed, and because only one layer of organic material is arranged at the aligning mark (3), the light transmittance is increased and the aligning success rate is improved.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a flexible substrate and a manufacturing method thereof. Background technique [0002] Organic Light Emitting Display (OLED) OLED is a display technology with great development prospects. It not only has excellent display performance, but also has self-illumination, simple structure, ultra-thin, fast response, wide Viewing angle, low power consumption and flexible display are known as "dream display", which has been favored by major display manufacturers and has become the main force of the third-generation display devices in the field of display technology. [0003] A flexible OLED display device requires an array of pixel structures distributed on a substrate, and each pixel structure generally includes thin film transistors (Thin Film Transistor, TFT), capacitors and other components. [0004] At present, OLED flexible display devices are generally prepared on the basis of o...

AI Technical Summary

Problems solved by technology

However, the larger the coverage area of ​​the organic material substrate on the carrier glass substrate, the greater the warpage of the organic material substrate during the array process, and the lower the production yield. Therefore, we need to ensure the production of various alignment marks. Minimize its footprint on the carrier glass substrate while on the organic material substrate

[0005] Based on the layout design and equipment specifications in actual production, take the OLED evaporation alignment Mark in the series Mark closest to the edge of the substrate as an example. Due to the large viscosity coefficient of the organic material used in the flexible organic material substrate, the flexible organic material The edge of the material substrate will form a very steep angle, which will easily cause etching residues and other phenomena at this position, and since the flexible organic material substrate in OLED flexible display devices made of LTPS materials is mostly made of colored and high-temperature resistant organic materials, the evaporation alignment When the alignment light source enters from the back of the flexible organic material substrate and passes through the colored flexible organic material substrate, it will cause light loss, reduce the light reflectivity of the alignment mark, and affect the success rate of alignment

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