Flexible display panel and preparation method thereof

Abstract

The invention discloses a preparation method of a flexible display panel. The preparation method comprises the following steps: forming a first stress relief layer on one side of a rigid substrate; forming a second stress relief layer on the other opposite side of the rigid substrate; forming a flexible substrate on the first stress relief layer; and forming a display device on the flexible substrate. The stress relieving layers are prepared on the two opposite sides of the rigid substrate respectively, acting force on the rigid substrate is counteracted by means of the fact that materials onthe two sides are the same in deformation quantity and opposite in deformation direction, stress borne by the rigid substrate is reduced, and therefore the warping problem of the rigid substrate is solved. Besides, when the stress relief layer is made of organic materials, the problems of warping of the rigid substrate and difficult tape-out of a machine in the manufacturing process can be solved,meanwhile, the organic layer can protect the rigid substrate, and the risk of tape-out breakage is reduced.

Description

technical field [0001] The present application relates to the field of flexible display technology, in particular to a flexible display panel and a preparation method thereof. Background technique [0002] Flexible display panels have become the mainstream development trend of new displays due to their advantages of thinness, lightness, low power consumption, high brightness, fast response, and bendability. Due to the shortcomings of traditional glass substrates such as excessive bending curvature, heavy weight, and fragility, their application and development in flexible displays are limited. Therefore, currently flexible displays mostly use polymer materials such as polyethylene terephthalate (PET), polyimide (Polyimide, PI) and the like as flexible substrates. Due to the weak bearing capacity and poor flatness of this type of flexible substrate, the existing technology mostly uses a hard substrate (such as glass, etc.) Flatness to ensure device performance. [0003] Ho...

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Problems solved by technology

[0004] The embodiment of the present application provides a flexible display panel and its preparation method to solve the problem of using a hard substrate as a substrate to manufacture a flexible substrate and a display device in an existing method for preparing a flexible display panel. The coefficient of thermal expansion varies greatly. During the process of heating up or cooling down, the deformation of the flexible substrate is large, which produces stress on the hard substrate, causing the hard substrate to warp, which in turn leads to the technical problem of difficulty in machine taping.

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