Flexible electronic device including conformal flexible protective layer

1. A flexible electronic device comprising:

device units;

a first etching preventing layer provided on the device units;

a conductive line provided on the first etching preventing layer and electrically connected to the device units;

a flexible substrate configured to cover the conductive line on the first etching preventing layer and the conductive line;

a trench configured to separate the device units and expose a portion of a bottom surface of the first etching preventing layer and a side surface of each of the device units; and

a flexible protective layer configured to conformally cover a bottom surface of each of the device units and an inside of the trench,

wherein each of the device units comprises a protective substrate, driving parts provided on the protective substrate, and a first encapsulation layer configured to cover the driving parts.

2. The flexible electronic device of claim 1 , wherein the flexible substrate has a plurality of pixel areas and a bridge area configured to surround the pixel areas,

the device units are provided on the pixel areas, respectively, and

the trench is provided on the bridge area.

3. The flexible electronic device of claim 2 , wherein each of the first etching preventing layer, the conductive line, and the flexible substrate extends to the bridge area, and

the device units are connected to each other by the first etching preventing layer and the flexible substrate.

4. The flexible electronic device of claim 2 , wherein each of the first etching preventing layer, the conductive line, the flexible substrate, and the flexible protective layer has a wrinkle structure on the bridge area.

5. The flexible electronic device of claim 2 , wherein the bridge area comprises openings,

wherein the openings expose a side surface of each of the first etching preventing layer, the flexible substrate, and the flexible protective layer, and

the bridge area comprising the opening has a curved shape to connect the pixel areas.

6. The flexible electronic device of claim 2 , wherein the flexible electronic device is bendable such that a separation of surfaces of the flexible protective layer is reduced in the trench.

7. The flexible electronic device of claim 1 , wherein the first etching preventing layer comprises a material having an etching selectivity with respect to the first encapsulation layer, and

each of the flexible substrate and the flexible protective layer comprises an insulating polymer.

8. The flexible electronic device of claim 1 , wherein each of the driving parts comprises a gate pattern, a source pattern, a drain pattern, and an active pattern, and

the flexible electronic device further comprises an insulating layer between the gate pattern and the first encapsulation layer.

9. The flexible electronic device of claim 8 , wherein the source pattern, and the drain pattern are electrically connected to the conductive line.

10. The flexible electronic device of claim 8 , further comprising:

light emitting parts provided on the first encapsulation layer; and

a second encapsulation layer configured to cover the light emitting parts.

11. The flexible electronic device of claim 10 , wherein each of the light emitting parts comprises a first electrode, a light emitting layer, and a second electrode,

wherein the first electrode is electrically connected to the drain pattern, and the second electrode is electrically connected to the conductive line.

12. The flexible electronic device of claim 10 , wherein each of the protective substrate, the insulating layer, the first encapsulation layer, and the second encapsulation layer comprises a gas barrier material,

wherein the first encapsulation layer seals the driving parts, and the second encapsulation layer seals the light emitting parts.