Display device and manufacturing method of the same
According to one embodiment, a display device comprises an insulating layer, a lower electrode on the insulating layer, a rib on the insulating layer, a partition including a lower portion and upper portion, an organic layer, an organic layer covering the lower electrode, and an upper electrode covering the organic layer. The rib comprises a first rib layer formed of an inorganic insulating material and arranged on the insulating layer, and a second rib layer formed of an inorganic insulating material and arranged on the first rib layer. The second rib layer protrudes from a side surface of the first rib layer and a side surface of the lower portion.
1 . A display device comprising:
an insulating layer formed of an inorganic insulating material;
a lower electrode arranged on the insulating layer;
a rib arranged on the insulating layer and surrounding the lower electrode;
a partition including a conductive lower portion arranged on the rib and an upper portion protruding from a side surface of the lower portion, 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 and contacting the lower portion, wherein
the rib comprises:
a first rib layer formed of an inorganic insulating material and arranged on the insulating layer; and
a second rib layer formed of an inorganic insulating material and arranged on the first rib layer, and
the second rib layer protrudes from a side surface of the first rib layer and a side surface of the lower portion.
2 . The display device of claim 1 , wherein
a thickness of the first rib layer is larger than a thickness of the lower electrode.
3 . The display device of claim 2 , wherein
a thickness of the first rib layer is smaller than a total thickness of the lower electrode and the organic layer.
4 . The display device of claim 1 , wherein
a width of the second rib layer is larger than a width of the upper portion.
5 . The display device of claim 1 , wherein
a width of the second rib layer is smaller than a width of the upper portion.
6 . The display device of claim 1 , wherein
the lower electrode has an end portion having a thickness reduced toward the first rib layer, and
a part of the end portion is located in a gap formed between a part of the second rib layer, which protrudes from the side surface of the first rib layer, and the insulating layer.
7 . The display device of claim 6 , wherein
the organic layer fills the gap.
8 . 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.
9 . The display device of claim 1 , wherein
a part of the lower electrode is located on the upper portion.
10 . The display device of claim 1 , wherein
a part of the lower electrode is located on the second rib layer.
11 . 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.
12 . The display device of claim 11 , 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.
13 . A display device manufacturing method, comprising:
forming an insulating layer of an inorganic insulating material;
forming a first thin film of an inorganic insulating material on the insulating layer;
forming a second thin film of an inorganic insulating material on the first thin film;
forming a partition including a conductive lower portion arranged on the second thin film and an upper portion protruding from a side surface of the lower portion;
forming a second rib layer protruding from the side surface of the lower portion by patterning the second thin film;
forming a first rib layer having a width smaller than the second rib layer by removing a part of the first thin film, which is exposed from the second rib layer, and reducing a width of the first thin film;
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.
14 . The manufacturing method of claim 13 , wherein
formation of the lower electrode and the organic layer is continuously executed in a vacuum environment.
15 . The manufacturing method of claim 13 , 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.
16 . The manufacturing method of claim 15 , wherein
formation of the lower electrode, the organic layer, the upper electrode and the sealing layer is continuously executed in a vacuum environment.