Display device and manufacturing method thereof

1. A display device, comprising:

a display panel including:

a first area having a plurality of pixels on a first surface of a substrate,

a second area having a plurality of pads on the first surface of the substrate, and

a third area that is a part of the second area, the third area having a part of a second surface of the substrate bent toward the first surface of the substrate; and

a flexible printed circuit board (PCB) including:

a first bent portion in the second area of the display panel, the first bent portion contacting and electrically connected to the plurality of pads on the first surface of the substrate, the first bent portion being bent from an inside of the display panel toward an external side of the display panel so as to wrap around an edge of the display panel, and

a second bent portion extending from the first bent portion, the second bent portion wrapping an external side of the second area and being bent toward the inside of the display panel from the external side of the display panel to contact the second surface of the substrate.

2. The display device as claimed in claim 1 , further comprising a passivation layer on the second surface of the substrate.

3. The display device as claimed in claim 2 , wherein the passivation layer overlaps the first area.

4. The display device as claimed in claim 2 , wherein the passivation layer overlaps at least part of the first area and at least part of the second area.

5. The display device as claimed in claim 1 , wherein the display panel includes a lateral surface connecting the first surface and the second surface, an adhesive portion being on the lateral surface in the third area.

6. The display device as claimed in claim 5 , wherein the adhesive portion includes at least one of an epoxy resin, an acryl-based resin, a silicon-based resin, and a urethane-based resin.

7. The display device as claimed in claim 1 , further comprising a window on the display panel so as to protect the display panel.

8. The display device as claimed in claim 7 , wherein the window includes a recess facing the display panel, parts of the second area, the third area, the first bent portion, and the second bent portion being accommodated in the recess.

9. The display device as claimed in claim 1 , further comprising a driving chip electrically connected to the pads.

10. The display device as claimed in claim 9 , wherein the driving chip is on the flexible printed circuit board (PCB).

11. The display device as claimed in claim 9 , wherein the driving chip is in the second area.

12. The display device as claimed in claim 11 , wherein the second area includes:

a plurality of insulating layers extending from the first area; and

a receiving groove on the insulating layer and receiving the driving chip.

13. The display device as claimed in claim 1 , wherein the first bent portion and the second bent portion of the flexible PCB are continuous with each other and wrap around different ends of the second area.

14. The display device as claimed in claim 13 , wherein each of the first bent portion and the second bent portion includes a curved portion wrapped around a respective end of the second area, and an open portion opposite a respective curved portion, the open portions of the first bent portion and the second bent portion facing each other.

15. The display device as claimed in claim 13 , wherein the first bent portion and the second bent portion at least partially overlap each other.