DISPLAY DEVICE AND MANUFACTURING METHOD OF THE SAME

1 . A display device comprising:

an insulating layer formed of an inorganic insulating material;

a lower electrode arranged on the insulating layer;

a rib formed of an inorganic insulating material, arranged on the insulating layer, and surrounding the lower electrode;

a partition arranged on the rib and surrounding the lower electrode;

an organic layer covering the lower electrode and emitting light in response to application of a voltage; and

an upper electrode covering the organic layer, wherein

the partition includes:

a conductive lower portion arranged on the rib and protruding from a side surface of the rib; and

an upper portion arranged on the lower portion and protruding from a side surface of the lower portion,

the lower electrode is separated from the lower portion, and

the upper electrode is in contact with the side surface of the lower portion.

2 . The display device of claim 1 , wherein

a thickness of the rib is larger than a thickness of the lower electrode.

3 . The display device of claim 2 , wherein

the thickness of the rib is smaller than a total thickness of the lower electrode and the organic layer.

4 . The display device of claim 1 , wherein

the lower electrode includes an end portion located under the upper portion and having a thickness reduced toward the rib.

5 . The display device of claim 4 , wherein

a part of the end portion of the lower electrode is located in a gap formed between a part of the lower portion, which protrudes from the side surface of the rib, and the insulating layer.

6 . The display device of claim 5 , wherein

the organic layer fills the gap.

7 . The display device of claim 1 , wherein

the lower electrode is formed of silver, and

the organic layer is in contact with an upper surface of the lower electrode.

8 . The display device of claim 1 , wherein

a part of the lower electrode is located on the upper portion.

9 . The display device of claim 1 , further comprising:

a sealing layer continuously covering a display element which includes the lower electrode, the organic layer, and the upper electrode, and the partition.

10 . The display device of claim 9 , further comprising:

an optical adjustment layer located between the upper electrode and the sealing layer and having a refractive index different from the upper electrode and the sealing layer.

11 . A display device manufacturing method, comprising:

forming an insulating layer of an inorganic insulating material;

forming a thin film of an inorganic insulating material on the insulating layer;

forming a partition including a conductive lower portion arranged on the thin film and an upper portion protruding from a side surface of the lower portion;

removing a part of the thin film, which is exposed from the lower portion, reducing a width of the thin film, and thereby forming a rib having a width smaller than the lower portion;

forming a lower electrode on the insulating layer and the partition by vapor deposition;

forming an organic layer which emits light in response to application of a voltage, on the lower electrode, by vapor deposition; and

forming an upper electrode which is in contact with the lower portion, on the organic layer, by vapor deposition.

12 . The manufacturing method of claim 11 , wherein

formation of the lower electrode and the organic layer is continuously executed in a vacuum environment.

13 . The manufacturing method of claim 11 , further comprising:

forming a sealing layer continuously covering a display element which includes the lower electrode, the organic layer, and the upper electrode, and the partition.

14 . The manufacturing method of claim 13 , wherein

formation of the lower electrode, the organic layer, the upper electrode, and the sealing layer is continuously executed in a vacuum environment.