A wiring structure in the bending area of ​​a folding screen, a display device and a manufacturing method thereof

Abstract

The invention provides a wiring structure in a bending area of ​​a folding screen, a display device and a manufacturing method thereof. The wiring structure in the bending area of ​​the folding screen includes a wiring substrate, a silicone packaging layer, a liquid wiring, and a metal wiring. The liquid wiring is encapsulated in the silicone packaging layer, and the silicone packaging layer can realize the shaping of the liquid wiring; the metal wiring is arranged at the end of the silicone packaging layer and extends into it to communicate with the liquid wiring electrical connection. The display device includes the above wiring structure in the bending area of ​​the folding screen. The manufacturing method of the routing structure in the bending area of ​​the folding screen includes the steps of etching the routing substrate, manufacturing a silicone packaging layer, manufacturing liquid routing, and electrical connection treatment. The bending area uses liquid wiring to avoid the defects that the metal wiring structure is not suitable for bending and is prone to cracks during the bending process. This structure can prevent the problem of line interruption during the bending process, improve product yield, and reduce the use of folding screens. risk of failure.

Description

technical field [0001] The invention relates to the field of display, 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 (Organic Light Emitting Display, OLED) technology. Flexible OLEDs do not use glass as a substrate. Among them, foldable active-matrix organic light-emitting diode (AMOLED) displays can be like wallets. folded up. When not in use, it is 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 foldable, research is needed to minimize panel damage 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 a key research problem for the current...

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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