Display device and method of manufacturing the same

1. A method of manufacturing a display device, the method comprising:

forming a display module including a first area defined therein, the display module comprising a display panel including a lower surface and an upper surface opposite the lower surface, a first film under the lower surface of the display panel, and an adhesive layer between the lower surface of the display panel and the first film; and

irradiating a laser beam in an upper direction extending from the lower surface of the display panel to the upper surface of the display panel to cut the first film to define a film groove therein and the adhesive layer to define an adhesive groove therein to overlap with the film groove along at least one edge of the first area,

wherein the display panel comprises a base substrate defining the lower surface, and a first portion of the base substrate exposed by the film groove and the adhesive groove and a second portion of the base substrate overlapped with the first film and the adhesive layer have a difference of crystallization degree equal to or smaller than about 5%.

2. The method of claim 1 , wherein the laser beam is a CO 2 laser beam or an UV laser beam.

3. The method of claim 2 , wherein the CO 2 laser beam has a wavelength of from about 9.1 μm to about 10.7 μm, or the UV laser beam has a wavelength equal to or smaller than about 360 nm.

4. The method of claim 1 , wherein the first area crosses the display module in a first direction when viewed in a plan view, and the irradiating the laser beam to cut the first film and the adhesive layer comprises:

irradiating the laser beam to a first edge of the at least one edge of the first area extending in the first direction; and

irradiating the laser beam to a second edge of the at least one edge of the first area extending in the first direction and spaced apart from the first edge of the first area.

5. The method of claim 4 , further comprising bending the display module with respect to a reference axis defined in the first area and extending in the first direction.

6. The method of claim 4 , further comprising irradiating another laser beam to the first area between the first edge and the second edge to cut the first film and the adhesive layer.

7. The method of claim 1 , wherein the base substrate comprises polyimide.

8. The method of claim 1 , wherein the first film comprises polyethylene terephthalate.

9. The method of claim 1 , wherein a first portion of a lower surface of the base substrate of the display panel is exposed by the irradiating the laser beam to cut the first film and the adhesive layer.

10. The method of claim 1 , further comprising removing a portion of the first film and a portion of the adhesive layer which are in the first area.

11. A display device comprising:

a display panel comprising a lower surface and an upper surface opposite the lower surface;

a first film under the lower surface of the display panel and comprising a film groove defined therein; and

an adhesive layer between the lower surface of the display panel and the first film and comprising an adhesive groove defined therein to overlap with the film groove,

wherein the display panel comprises a base substrate defining the lower surface,

wherein the base substrate comprises a first portion and a second portion, the first portion is exposed by the film groove and the adhesive groove, the second portion is overlapped with the first film and the adhesive layer, and the first portion and the second portion have a difference of crystallization degree equal to or smaller than about 5%.

12. The display device of claim 11 , wherein the second portion has a crystallization degree greater than a crystallization degree of the first portion.

13. The display device of claim 11 , wherein the first portion of the base substrate is connected to an inner surface of the adhesive groove, and the first portion has a crystallization degree smaller by about 5% than a crystallization degree of a third portion exposed by the film groove and the adhesive groove and spaced apart from the second portion by the first portion.

14. The display device of claim 13 , wherein a lower surface of the third portion has a surface roughness greater than a surface roughness of a lower surface of the first portion.

15. The display device of claim 11 , wherein an angle between the second portion of the base substrate and an inner surface of the first film providing the film groove is an acute angle, and

wherein an angle between the second portion of the base substrate and an inner surface of the adhesive layer providing the adhesive groove is an acute angle.

16. The display device of claim 11 , further comprising a burr on a lower surface of the first film adjacent to the film groove.

17. The display device of claim 11 , wherein the display panel comprises a display area to display an image and a non-display area adjacent to the display area, and the film groove and the adhesive groove are in the non-display area.

18. The display device of claim 11 , wherein the display panel comprises a display area to display an image and a non-display area adjacent to the display area, and the film groove and the adhesive groove cross the display area when viewed in a plan view.

19. The display device of claim 11 , wherein the film groove and the adhesive groove cross the display panel in a first direction, and the display device is bent with respect to a reference axis defined to overlap with the film groove and the adhesive groove and extending in the first direction.

20. The display device of claim 11 , wherein the base substrate comprises polyimide.

21. The display device of claim 11 , wherein the first film comprises polyethylene terephthalate (PET).

22. A display device comprising:

a display panel comprising a lower surface and an upper surface opposite the lower surface;

a first film under the lower surface of the display panel and comprising a film groove defined therein; and

an adhesive layer between the lower surface of the display panel and the first film and comprising an adhesive groove defined therein to overlap with the film groove,

wherein the display panel comprises a base substrate defining the lower surface,

wherein the base substrate comprises a first portion, a second portion, and a third portion, the first portion is exposed by the film groove and the adhesive groove, the second portion is overlapped with the first film and the adhesive layer, the third portion is exposed by the film groove and the adhesive groove and spaced apart from the second portion by the first portion, a lower surface of the third portion has a surface roughness greater than a surface roughness of a lower surface of the first portion.