Flexible base substrate, flexible display panel, and method for preparing the same
AssigneeWuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd.
InventorFuyang Zhang
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Abstract
A flexible base substrate, a flexible display panel, and a method for preparing the same are provided. By preparing a composite substrate structure composed of a first polyimide layer, a water-oxygen barrier layer, a protective layer, and a second polyimide layer, the prepared flexible display panel has desired water and oxygen barrier property, thereby greatly reducing the probability of water and oxygen passing through the flexible base substrate, and improving the service lifespan of the flexible display panel.
Claims20
A flexible base substrate having a panel area a panel edge area divided by a laser cut line, comprising:
- a first polyimide layer formed in the panel area and the panel edge area;
- a water-oxygen barrier layer covering the first polyimide layer;
- a protective layer disposed on the water-oxygen barrier layer in the panel area and near the laser cut line, wherein a material of the protective layer comprises at least one of silicon oxide, silicon nitride, and amorphous silicon, and a thickness of the protective layer ranges from 0.1 to 5 μm;
- and
- a second polyimide layer covering the protective layer and the water-oxygen barrier layer.
A flexible display panel comprising a panel area, the panel area comprising a display area and a non-display area, wherein the flexible display panel comprises:
- a flexible base substrate comprising a first polyimide layer formed in the display area and the non-display area, a water-oxygen barrier layer covering the first polyimide layer, a protective layer disposed on the water-oxygen barrier layer and corresponding to the non-display area, and a second polyimide layer covering the protective layer and the water-oxygen barrier layer;
- and
- a thin film transistor array layer and an encapsulation layer sequentially stacked and disposed on the flexible base substrate and corresponding to the display area, wherein the encapsulation layer covers a lateral side of the thin film transistor array layer near the non-display area, and partially covers the second polyimide layer.
A method for preparing a flexible display panel, comprising:
- providing a rigid substrate, wherein the rigid substrate has a panel area and a panel edge area divided by a laser cut line, wherein the panel area comprises a display area and a non-display area, and the non-display area is near the laser cut line;
- preparing a first polyimide layer on the rigid substrate, wherein the first polyimide layer is formed in the panel area and the panel edge area;
- depositing a water-oxygen barrier layer on the first polyimide layer, wherein the water-oxygen barrier layer covers the first polyimide layer;
- preparing a protective layer on the water-oxygen barrier layer corresponding to the non-display area, wherein the protective layer is near the laser cut line;
- preparing a second polyimide layer on the protective layer and the water-oxygen barrier layer;
- sequentially preparing a thin film transistor array layer and an encapsulation layer on the second polyimide layer corresponding to the display area, wherein the encapsulation layer covers a lateral side of the thin film transistor array layer near the non-display area, and partially covers the second polyimide layer;
- and
- separating the rigid substrate from the first polyimide layer, and cutting the panel edge area along the laser cut line to obtain the flexible display panel.
Dependencies are inferred from the claim text.