Processing method of stainless steel foil, stainless steel foil and flexible display device

Abstract

The invention discloses a processing method of a stainless steel foil, the stainless steel foil and a flexible display device. The processing method comprises the following steps of providing a plurality of formed stainless steel foil monomers; forming insulating protective films on the first surface and the second surface of each stainless steel foil monomer, wherein each insulating protective film comprises a plurality of first through holes; filling conductive layers in the first through holes to form a conductive stainless steel foil monomer; laminating a plurality of conductive stainlesssteel foil monomers to form a conductive stainless steel foil monomer group; and forming at least one metal layer on the side wall of the conductive stainless steel foil monomer group by utilizing anelectroplating process. According to the processing method, the section of the stainless steel foil is processed by using the electroplating process, and the defect part of the section is repaired, sothat the strength and corrosion resistance of the stainless steel foil are improved, and the bending life of the stainless steel foil is prolonged.

Description

technical field [0001] Embodiments of the present invention relate to flexible display technology, and in particular to a processing method of stainless steel foil, stainless steel foil and a flexible display device. Background technique [0002] With the rapid development of display technology, various portable electronic devices (such as mobile phones, tablet computers, etc.) have gradually become indispensable portable items in people's life and work. With the demand for various entertainment and office functions, people's demand for large-size screens continues to increase. However, the portability of large-size screens will decline. Foldable display devices are increasingly popular due to their advantages of portability and large-size screens. more and more attention. [0003] Existing foldable display devices generally include a flexible display panel and a stainless steel foil attached to the back of the flexible display panel, and the stainless steel foil supports t...

AI Technical Summary

Problems solved by technology

In the prior art, the stainless steel foil used in the foldable display device is mainly formed by stamping process, etching process or laser cutting process. There are obvious damage areas on the punching surface formed by the stamping process, and the damaged area may be damaged in a high temperature and high humidity environment. Corrosion occurs, the defect is enlarged, and it is easy to break at the defect position during the dynamic bending test; the etching surface formed by the etching process is uneven in height, there is an obvious etching boundary, and some side etching is obvious, causing the etching section to be not very good. Flat, there are height differences and defects, because the etching destroys the original dense structure of stainless steel, in high temperature and high humidity environment, the edge is easy to be corroded, the defect is enlarged, and it is easy to break at the defect position when doing dynamic bending test; laser cutting The process uses high-energy ablation, so there is a burnt black edge visible to the naked eye on the cutting edge, where the stainless steel crystal structure changes, and the appearance and performance may not meet the requirements

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