Display device and method of manufacturing the same
A display device includes a substrate having a display area and a contact area located in the display area, a power line in the display area on the substrate, overlapping the contact area, and including a first conductive layer and a second conductive layer on the first conductive layer, a passivation layer on the substrate and the power line and having a protrusion protruding in a first direction with respect to an edge of an upper surface of the first conductive layer in the contact area, and a common electrode on the substrate and the passivation layer and electrically connected to the power line in the contact area.
1 . A display device comprising:
a substrate having a display area and a contact area located in the display area;
a power line disposed in the display area on the substrate, overlapping the contact area, and including a first conductive layer and a second conductive layer disposed on the first conductive layer;
a passivation layer disposed on the substrate and the power line and having a protrusion protruding in a first direction with respect to an edge of an upper surface of the first conductive layer in the contact area; and
a common electrode disposed on the substrate and the passivation layer and electrically connected to the power line in the contact area,
wherein in the contact area, the passivation layer exposes a side surface of the first conductive layer, the side surface extending from the edge of the upper surface of the first conductive layer, and
an undercut shape is defined in the contact area by the side surface of the first conductive layer and the protrusion.
2 . The display device of claim 1 , further comprising:
a capping electrode which is disconnected by the protrusion and contacts the side surface of the first conductive layer in the contact area.
3 . The display device of claim 2 , wherein the common electrode is electrically connected to the power line through the capping electrode.
4 . The display device of claim 2 , wherein the capping electrode covers the side surface of the first conductive layer.
5 . The display device of claim 2 , further comprising:
a transistor in the display area on the substrate; and
a pixel electrode on the transistor and electrically connected to the transistor, and
wherein the capping electrode and the pixel electrode are disposed on a same layer.
6 . The display device of claim 1 , wherein the common electrode contacts the side surface of the first conductive layer.
7 . The display device of claim 1 , wherein in the contact area, the passivation layer covers a side surface of the second conductive layer extending from an edge of an upper surface of the second conductive layer.
8 . The display device of claim 7 , wherein, in the contact area, the edge of the upper surface of the second conductive layer protrudes in the first direction beyond the edge of the upper surface of the first conductive layer.
9 . The display device of claim 7 , wherein, in the contact area, the edge of the upper surface of the second conductive layer is recessed from the edge of the upper surface of the first conductive layer in a second direction opposite to the first direction.
10 . The display device of claim 1 , further comprising:
a via insulation layer on the passivation layer and exposing at least a portion of the protrusion; and
a thin film inorganic layer between the passivation layer and the via insulation layer.
11 . The display device of claim 10 , wherein in the contact area, the via insulation layer covers an entire of the passivation layer except for at least a portion of the protrusion.
12 . The display device of claim 10 , wherein a thickness of the thin film inorganic layer is smaller than a thickness of the passivation layer.
13 . The display device of claim 12 , wherein the first conductive layer includes at least one conductor out of copper (Cu) and aluminum (Al), and the second conductive layer includes at least one of a transparent conductive oxide, titanium (Ti), and molybdenum (Mo).
14 . The display device of claim 1 , wherein the passivation layer includes an inorganic insulating material.
15 . The display device of claim 1 , further comprising:
an emission layer which is disconnected by the protrusion in the contact area.
16 . The display device of claim 1 , further comprising:
a pad electrode disposed in a pad area located at one side of the display area on the substrate and disposed on a same layer as the power line, and
wherein the passivation layer exposes at least a portion of an upper surface of the pad electrode.