Organic light-emitting display device including auxiliary electrode
An organic light-emitting display device includes a substrate defining an emission area and a non-emission area; an insulating layer on the substrate and having at least two grooves being defined at a portion of the insulating layer corresponding to the non-emission area; a first electrode on the insulating layer at a portion of the insulating layer corresponding to the emission area; an auxiliary electrode on the insulating layer and spaced apart from the first electrode, the auxiliary electrode being on at least a portion of the insulating layer having the at least two grooves; a bank pattern on portions of the first and auxiliary electrodes; a barrier on the auxiliary electrode and separated from the bank pattern, the barrier being formed of a same material as the bank pattern; an organic light-emitting layer on the first electrode; and a second electrode on the organic light-emitting layer.
1. A method of fabricating an organic light-emitting display device, the method comprising:
forming an insulating layer on a substrate, the substrate defining an emission area and a non-emission area, and the insulating layer including at least two dented portions at the non-emission area;
forming a first electrode on the insulating layer at the emission area;
forming an auxiliary electrode on the insulating layer at the non-emission area and corresponding to the at least two dented portions;
forming a bank pattern on the first electrode and the auxiliary electrode;
forming an organic light-emitting layer on the first electrode; and
forming a second electrode on the organic light-emitting layer and the auxiliary electrode and electrically connected to the auxiliary electrode.
2. The method according to claim 1 , further comprising a step of forming a barrier on the auxiliary electrode.
3. The method according to claim 2 , wherein the barrier is disposed between the at least two dented portions.
4. The method according to claim 2 , wherein the barrier is formed of a same material as the bank pattern.
5. The method according to claim 4 , wherein the bank pattern and the barrier include an opaque organic material.
6. The method according to claim 2 , wherein the bank pattern has a normal tapered shape, and the barrier has a reverse tapered shape.
7. The method according to claim 6 , wherein the auxiliary electrode has a continuous top surface along a top surface of the insulating layer including the at least two dented portions.
8. The method according to claim 7 , wherein the auxiliary electrode includes at least two concave portions corresponding to the at least two dented portions.
9. The method according to claim 8 , wherein the auxiliary electrode further includes a flat portion between the at least two concave portions.
10. The method according to claim 9 , wherein the barrier is disposed on the flat portion.
11. The method according to claim 2 , wherein the bank pattern and the barrier have a normal tapered shape.
12. The method according to claim 11 , wherein the auxiliary electrode has a discontinuous top surface along a top surface of the insulating layer including the at least two dented portions.
13. The method according to claim 12 , wherein the auxiliary electrode includes at least two holes corresponding to the at least two dented portions.
14. The method according to claim 12 , wherein the bank pattern, the barrier, and the auxiliary electrode have protrusions extending over edges of the at least two dented portions of the insulating layer.
15. The method according to claim 14 , wherein each of the protrusions of the bank pattern and the barrier has a width greater than a width of the protrusions of the auxiliary electrode.
16. The method according to claim 14 , further comprising a step of forming an electrode layer on the second electrode, wherein the electrode layer is in contact with the second electrode and the auxiliary electrode.
17. The method according to claim 16 , wherein the electrode layer contacts side and bottom surfaces of the auxiliary electrode, side surfaces of the at least two dented portions, and bottom surfaces of the protrusions of the bank pattern and the barrier.
18. The method according to claim 2 , wherein a layer of a same material as the organic light-emitting layer is located on the barrier.
19. The method according to claim 1 , wherein the at least two dented portions have one of a polygonal shape, a semicircular shape, and a semielliptical shape.
20. The method according to claim 1 , wherein the at least two dented portions have a depth between 1 μm and a thickness of the insulating layer.