Flexible display device with metallic material portion including recess and method of manufacturing the same
A display device and method of manufacturing the device that facilitates exposing a pad includes a flexible substrate including a central area and a peripheral area surrounding the central area, a display unit in the central area, an encapsulation layer covering the display unit and including at least one inorganic layer and at least one organic layer, an insulating layer disposed in the peripheral area defining a recess having a bottom and side portions, and a reinforcing portion disposed inside the recess, including a metallic material, and covering at least a part of the bottom and side portions of the recess.
1. A display device comprising:
a flexible substrate comprising a central area and a peripheral area surrounding the central area;
a display unit in the central area;
an encapsulation layer covering the display unit and including at least one inorganic layer and at least one organic layer;
an insulating layer disposed in the peripheral area and having a recess; and
a metallic material portion disposed inside the recess and covering at least a lower part of a slope surface and a bottom surface of the recess in a continuous manner,
wherein:
the metallic material portion has an irregular shape with a top surface that is rougher than a top surface of the insulating layer, and has a thickness that is gradually reduced from a bottom of the recess toward the slope surface; and
the slope surface of the recess has a curved shape.
2. The display device of claim 1 , wherein the metallic material portion is adjacent to an edge of the flexible substrate.
3. The display device of claim 1 , wherein a portion of the insulating layer adjacent the recess comprises a thermally denaturalized portion.
4. The display device of claim 1 , further comprising an additional insulating layer below the metallic material portion, the metallic material portion contacting an upper surface of the additional insulating layer.
5. The display device of claim 1 , further comprising a protective film disposed over the flexible substrate and covering the encapsulation layer.
6. The display device of claim 5 , wherein the protective film has an opening adjacent to the metallic material portion.
7. The display device of claim 6 , further comprising a pad in the peripheral area, the pad being exposed via the opening of the protective film.
8. The display device of claim 1 , wherein the display unit comprises:
a pixel circuit comprising a thin film transistor and a storage capacitor, the thin film transistor including a semiconductor layer, a gate electrode, a source electrode, and a drain electrode, and the storage capacitor including a first electrode and a second electrode; and
a display element connected to the pixel circuit.
9. The display device of claim 8 , wherein the metallic material portion comprises the same material as that of at least one of the gate electrode, the source electrode, the drain electrode, and the first electrode, and the second electrode.
10. The display device of claim 1 , wherein the display unit comprises a plurality of pixels each comprising an organic light-emitting diode.
11. The display device of claim 1 , the metallic material portion has a rough surface on an entire top surface.