Display device having first and second organic planarization layers with respective first and second openings therein that are not aligned with each other and expose a conductive pattern
A display device includes: a substrate; a first conductive layer on the substrate and including a conductive pattern electrically connected to a first transistor; a first organic planarization layer on the first conductive layer; an organic layer on the first organic planarization layer and including a first bank having a first height and a second organic planarization layer having a second height lower than the first height; a first electrode on the organic layer; a second electrode on the organic layer and spaced apart from the first electrode; and a light-emitting element between the first electrode and the second electrode. The first organic planarization layer has a first opening exposing the conductive pattern, and the second organic planarization layer has a second opening exposing the conductive pattern. Sidewalls of the first opening and sidewalls of the second opening are not aligned in line with each other.
1 . A display device comprising:
a substrate;
a first conductive layer on a surface of the substrate and comprising a conductive pattern electrically connected to a first transistor;
a first organic planarization layer on the first conductive layer;
an organic layer on the first organic planarization layer, the organic layer comprising a first bank having a first height and a second organic planarization layer having a second height lower than the first height, the first bank comprising a first sub-bank and a second sub-bank spaced apart from each other;
a first electrode on the organic layer;
a second electrode on the organic layer and spaced apart from the first electrode;
a light-emitting element on the organic layer, between the first electrode and the second electrode, and between the first sub-bank and the second sub-bank; and
a second bank on the organic layer, spaced apart from the first bank in a direction along the surface of the substrate, and having a height greater than the first bank,
wherein the first organic planarization layer has a first opening exposing the conductive pattern therethrough,
wherein the second organic planarization layer has a second opening open to the first opening and exposing the conductive pattern therethrough,
wherein a diameter or width of the second opening at where it is open to the first opening is the same as a diameter or width of the first opening at where it is open to the second opening, and
wherein sidewalls of the first organic planarization layer defining the first opening and sidewalls of the second organic planarization layer defining the second opening are not aligned in line with each other,
wherein the second bank overlaps the first opening in a thickness direction perpendicular to the surface of the substrate, and
wherein the second bank overlaps the second opening in the thickness direction.
2 . The display device of claim 1 , wherein the second opening overlaps at least a part of the first opening in the thickness direction.
3 . The display device of claim 2 , wherein a diameter or width of the second opening is smaller than a diameter or width of the first opening.
4 . The display device of claim 3 , wherein the second organic planarization layer covers the sidewalls of the first organic planarization layer defining the first opening and an upper surface of the first organic planarization layer.
5 . The display device of claim 3 , wherein an inclination angle of the sidewalls of the second organic planarization layer defining the second opening is greater than an inclination angle of the sidewalls of the first organic planarization layer defining the first opening.
6 . The display device of claim 3 , wherein the first electrode is electrically connected to the conductive pattern through the second opening.
7 . The display device of claim 2 , wherein a diameter or width of the second opening is larger than a diameter or width of the first opening.
8 . The display device of claim 7 , wherein the sidewalls of the second organic planarization layer defining the second opening are on an upper surface of the first organic planarization layer.
9 . The display device of claim 7 , wherein the first electrode is electrically connected to the conductive pattern through the first opening and the second opening.
10 . The display device of claim 7 , wherein the second opening exposes the first opening and a part of an upper surface of the first organic planarization layer.
11 . The display device of claim 1 , wherein the second opening deviates from the first opening in a direction when viewed from top.
12 . The display device of claim 1 , wherein an inclination angle of the sidewalls of the first organic planarization layer defining the first opening is different from an inclination angle of the sidewalls of the second organic planarization layer defining the second opening.
13 . The display device of claim 1 , wherein the first electrode is electrically connected to the conductive pattern through an electrode contact opening exposing the conductive pattern.
14 . The display device of claim 13 , wherein the electrode contact opening is formed by the first opening or the second opening.
15 . The display device of claim 1 , wherein the organic layer is directly on an upper surface of the first organic planarization layer.
16 . The display device of claim 1 , further comprising a passivation layer on the first organic planarization layer and having a third opening exposing the conductive pattern,
wherein the organic layer is on the passivation layer.
17 . The display device of claim 16 , wherein sidewalls of the passivation layer defining the third opening are aligned in line with the sidewalls of the first organic planarization layer defining the first opening.
18 . The display device of claim 1 , further comprising:
a second conductive layer on the substrate and comprising a first capacitor electrode;
a buffer layer on the second conductive layer;
a third conductive layer on the buffer layer and comprising a second capacitor electrode overlapping the first capacitor electrode in a thickness direction of the substrate; and
an interlayer insulating film on the third conductive layer,
wherein the first conductive layer is on the interlayer insulating film, and
wherein the first conductive layer further comprises a third capacitor electrode overlapping the first capacitor electrode and the second capacitor electrode in the thickness direction.
19 . The display device of claim 18 , wherein the first organic planarization layer and the second organic planarization layer are interposed between the first electrode and the third capacitor electrode.