Display device and method of manufacturing the same
A display device includes: a substrate; a first thin film transistor and a second thin film transistor arranged over the substrate; a display element connected to the first thin film transistor; a wiring connected to the second thin film transistor and including a first wiring layer and a second wiring layer; a pattern insulating layer arranged between the first wiring layer and the second wiring layer; a planarization layer covering the wiring; and a connection electrode arranged on the planarization layer and connected to the first wiring layer and the second wiring layer respectively through a first contact hole and a second contact hole.
1. A display device comprising:
a substrate;
a first thin film transistor disposed over the substrate;
a second thin film transistor disposed over the substrate;
a display element connected to the first thin film transistor;
a wiring connected to the second thin film transistor, wherein the wiring includes a first wiring layer and a second wiring layer disposed on a different layer than the first wiring layer;
a pattern insulating layer disposed between the first wiring layer and the second wiring layer;
a planarization layer covering the wiring; and
a connection electrode disposed on the planarization layer and connected to the first wiring layer and the second wiring layer through a first contact hole and a second contact hole, respectively.
2. The display device of claim 1 , wherein
a bottom surface of the second wiring layer has a same area as an entirety of an area defining a top surface of the pattern insulating layer.
3. The display device of claim 1 , wherein
a lateral surface of the second wiring layer is connected to a lateral surface of the pattern insulating layer.
4. The display device of claim 1 , wherein
the display element includes a pixel electrode, an emission layer, and an opposite electrode, and
the connection electrode includes a same material as a material of the pixel electrode and is disposed in a same layer as the pixel electrode.
5. The display device of claim 1 , wherein
an area of the first wiring layer is different from an area of the second wiring layer.
6. The display device of claim 1 , wherein
the planarization layer contacts a lateral surface of the pattern insulating layer.
7. The display device of claim 1 , further comprising:
a capacitor including a first electrode and a second electrode,
wherein the first electrode including a same material as a material of a gate electrode of the first thin film transistor, and
the second electrode overlaps the first electrode, includes a same material as a material of the first wiring layer, and is disposed in a same layer as the first wiring layer.
8. The display device of claim 1 , further comprising:
a bias electrode disposed below the first thin film transistor.
9. The display device of claim 8 , wherein
the bias electrode is connected to a source electrode or a drain electrode of the first thin film transistor.
10. The display device of claim 1 , wherein
the wiring includes a data line which provides a data signal to the second thin film transistor.
11. The display device of claim 1 , further comprising:
a thin-film encapsulation layer covering the display element,
wherein the thin-film encapsulation layer includes a first inorganic encapsulation layer, an organic encapsulation layer and a second inorganic encapsulation layer, which are stacked one on another.
12. The display device of claim 1 , further comprising:
a sealing substrate disposed opposite to the substrate.