Flexible substrate, flexible display panel, and manufacturing method thereof

1. A flexible substrate having a bending area, the flexible substrate comprising:

a first organic layer having a hollow-out portion in the bending area;

an inorganic layer formed above the first organic layer, wherein the inorganic layer has a concave portion and a convex portion which are located in the bending area, wherein the concave portion is disposed on a surface of the inorganic layer, near the first organic layer, and wherein the convex portion is disposed on a surface of the inorganic layer, far from the first organic layer; and

a second organic layer formed above the inorganic layer, wherein the second organic layer has an embedded portion in the bending area, and wherein the embedded portion and the convex portion of the inorganic layer are embedded with each other.

2. The flexible substrate of claim 1 , wherein material composition of the first organic layer comprises polyimide.

3. The flexible substrate of claim 1 , wherein material composition of the inorganic layer comprises SiNx.

4. The flexible substrate of claim 1 , wherein material composition of the second organic layer comprises polyimide.

5. A flexible display panel, comprising a flexible substrate, and a thin-film transistor layer, an organic light-emitting diode layer, and an encapsulation layer which overlap above the flexible substrate, wherein the flexible substrate comprises:

a first organic layer having a hollow-out portion in a bending area;

an inorganic layer formed above the first organic layer, wherein the inorganic layer has a concave portion and a convex portion which are located in the bending area, wherein the concave portion is disposed on a surface of the inorganic layer, near the first organic layer, and wherein the convex portion is disposed on a surface of the inorganic layer, far from the first organic layer; and

a second organic layer formed above the inorganic layer, wherein the second organic layer has an embedded portion in the bending area, and wherein the embedded portion and the convex portion of the inorganic layer are embedded with each other.

6. A method of manufacturing a flexible display panel, comprising:

forming a first organic layer on a substrate;

determining a bending area on the first organic layer and forming an adhesion layer on a part of the first organic layer, located in the bending area;

forming an inorganic layer on the adhesion layer and on the first organic layer;

forming a second organic layer on the inorganic layer;

forming a thin-film transistor layer, an organic light-emitting diode layer, and an encapsulation layer on the second organic layer in sequence;

removing the substrate; and

removing the part of the first organic layer, located in the bending area, and the adhesion layer so that the flexible display panel is formed.

7. The method of claim 6 , wherein the step of forming the adhesion layer on the part of the first organic layer, located in the bending area, comprises: forming the adhesion layer through a coating method.

8. The method of claim 6 , wherein the step of forming the inorganic layer on the adhesion layer and on the first organic layer comprises: forming the inorganic layer through a chemical vapor deposition method.

9. The method of claim 6 , wherein the step of removing the part of the first organic layer, located in the bending area, comprises: cutting the first organic layer through a laser.

10. The method of claim 6 , wherein the adhesion layer comprises at least one material selected from the group consisting of hexamethyldisilazane (HMDS), sorbitol, and dimethyl sulfoxide (DMSO).