Folding screen bent region routing structure, display device and manufacturing method of folding screen bent region routing structure

Abstract

The invention provides a folding screen bent region routing structure, a display device and a manufacturing method of the folding screen bent region routing structure. The folding screen bent region routing structure comprises a routing substrate, silica gel packaging layers, liquid routings and metal routings. The liquid routings are packaged in the silica gel packaging layers; the silica gel packaging layers can implement sizing of the liquid routings; and the metal routings are arranged at the end parts of the silica gel packaging layers and extend into the silica gel packaging layers to beelectrically connected with the liquid routings. The display device comprises the folding screen bent region routing structure. The manufacturing method of the folding screen bent region routing structure comprises the steps of: etching the routing substrate; manufacturing the silica gel packaging layers; manufacturing the liquid routings; and carrying out electrical connection processing. Due toadoption of the liquid routings in a bent region, the defects of difficulty in bending and easiness for generating cracks in the bending process of a metal routing structure are avoided; and by the structure, a breakage problem in the bending process can be prevented, product yield is improved, and a risk of failure of a folding screen in the using process is reduced.

Description

technical field [0001] The invention relates to the display field, in particular to a wiring structure in a bending area of ​​a folding screen, a display device and a manufacturing method thereof. Background technique [0002] Flexible displays are currently the mainstream of flexible organic light emitting diode display (Organic Light Emitting Display, OLED) technology. Flexible OLED does not use glass as a substrate, and the foldable active matrix organic light emitting diode (AMOLED) display can be like a wallet. folded up. When not in use, it can be folded to make it smaller, and by unfolding it when in use, a large screen can be achieved. Displays are technically difficult to fold, and to achieve foldability, research is needed to minimize damage to the panel by using materials with low stress (tensile / compressive strength) in the folded portion. Among them, the structure of the Hinge (hinge) bending area in the AMOLED flexible folding screen is currently a key resear...

AI Technical Summary

Problems solved by technology

[0003] At present, the structure of the hinge region of the folding screen mainly adopts the metal wiring structure of Ti / Al / Ti or Mo / Al / Mo. The metal wiring is deposited on the surface of the base film layer through the process of plasma sputtering, and solidified under high temperature quenching state. Form a brittle amorphous structure, and then add organic polymer fillers around the metal traces to assist it in achieving better bending, but microcracks are inevitably formed on the surface of the metal traces during the bending process, these Micro-cracks propagate during the structure of the folding screen Hinge region, eventually causing the metal wiring to be disconnected

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