Abstract: A display device is disclosed that includes a substrate including a display area including a first pixel area and a second pixel area which are adjacent to each other and a pad area spaced apart from the display area, a first reflection electrode disposed in the first pixel area on the substrate, a second reflection electrode disposed in the second pixel area on the substrate, a first transparent electrode disposed in the first pixel area on the first reflection electrode, a first thickness compensation layer disposed in the first pixel area on the first transparent electrode, and including a different material with the first transparent electrode, and a second thickness compensation layer disposed on the first thickness compensation layer, and including a center portion and an edge portion which has an inclination angle with respect to a surface of the first thickness compensation layer.

Abstract: A display panel includes a base substrate, a circuit layer including a transistor, a pixel-defining layer defining an emission opening portion, an auxiliary layer including a transparent metal oxide, a separator including a black component, and having an edge protruding toward the emission opening portion further than an edge of the auxiliary layer, and a light-emitting element above the circuit layer, and including a first electrode in the emission opening portion, a second electrode facing the first electrode, emission structures between the first electrode and the second electrode, and charge generation layers between the first electrode and the second electrode, wherein a stepped space is defined by a portion of a bottom surface of the separator, the edge of the auxiliary layer, and a portion of an upper surface of the pixel-defining layer, and wherein at least one of the charge generation layers is disconnected at the stepped space.

Abstract: A display panel including a base substrate including a pixel region and a peripheral region adjacent to the pixel region, a circuit layer on the base substrate, and a display element layer on the circuit layer, wherein the display element layer includes an inorganic layer having a first pixel opening overlapping the pixel region, a pixel-defining film comprising a second pixel opening corresponding to the first pixel opening and a peripheral opening overlapping the peripheral region, and at least a portion of the pixel defining film is on the inorganic layer, and a light-emitting element including a first electrode under the inorganic layer and at least an upper portion of an upper surface of the light-emitting element is exposed by the first pixel opening, a functional layer in the first pixel opening and the second pixel opening, and a second electrode on the functional layer.

Abstract: An etchant composition of an embodiment may etch a multi-layered film of titanium/copper and may include about 5 wt % to about 20 wt % of persulfate, about 0.1 wt % to about 5 wt % of phosphoric acid or phosphate, about 0.01 wt % to about 2 wt % of a carbonyl ring compound, about 0.01 wt % to about 1 wt % of a 3-nitrogen ring compound, about 0.1 wt % to about 2 wt % of a 4-nitrogen ring compound, about 0.1 wt % to about 0.9 wt % of a fluorine compound, about 0.1 wt % to about 0.5 wt % of hydrogen about 1 wt % to about 3 wt % of a zwitterionic compound, and sulfate, water which is included in an amount that makes the total weight of the entire composition about 100 wt %.

Abstract: A display panel includes a base substrate, a first transistor disposed on the base substrate and including a first semiconductor pattern layer and a first gate electrode, and a light emitting element disposed on the first transistor and electrically connected to the first transistor. The first semiconductor pattern layer may include a first active pattern layer disposed on the base substrate, a first drain contacting the first active pattern layer, and a first source contacting the first active pattern layer and spaced apart from the first drain. A first spaced region between the first drain and the first source may be defined as a first channel region of the first active pattern layer, and the first gate electrode may overlap the first channel region.

Abstract: An etchant composition of an embodiment may etch a multi-layered film of titanium/copper and may include about 5 wt % to about 20 wt % of persulfate, about 0.1 wt % to about 5 wt % of phosphoric acid or phosphate, about 0.01 wt % to about 2 wt % of a carbonyl ring compound, about 0.01 wt % to about 1 wt % of a 3-nitrogen ring compound, about 0.1 wt % to about 2 wt % of a 4-nitrogen ring compound, about 0.1 wt % to about 0.9 wt % of a fluorine compound, about 0.1 wt % to about 0.5 wt % of hydrogen about 1 wt % to about 3 wt % of a zwitterionic compound, and sulfate, water which is included in an amount that makes the total weight of the entire composition about 100 wt %.