Organic light-emitting display device and method of manufacturing the same
View Patent ↗A method of manufacturing an organic light-emitting display device is disclosed. The method includes: uniformly forming an active layer on an entire surface of a substrate on which an organic light-emitting diode, a thin film transistor (TFT), and a capacitor are to be formed; performing a first mask process on the active layer to form a pixel electrode of the organic light-emitting diode, a gate electrode of the TFT, and an upper electrode of the capacitor; performing a second mask process to form an insulating layer having openings that expose the pixel electrode, the upper electrode, and the active layer in a region of the TFT; performing a third mask process to form a source-drain electrode that contacts an exposed portion of the active layer; and performing a fourth mask process to form a pixel-defining layer (PDL) that exposes the pixel electrode and covers the TFT and the capacitor.
1. An organic light-emitting display device comprising:
a substrate;
an active layer uniformly covering an entire surface of the substrate;
a thin film transistor (TFT) on the substrate and comprising:
a portion of the active layer;
a gate electrode on the active layer with a gate insulating layer therebetween; and
a gate guard surrounding the gate electrode to define a region of the TFT; and
an organic light-emitting diode and a capacitor on the substrate and that are electrically connected to the TFT.
2. The organic light-emitting display device of claim 1 , wherein the TFT further comprises:
a source-drain electrode connected to the active layer.
3. The organic light-emitting display device of claim 2 , wherein the gate electrode and the gate guard are formed in a same layer by using a same material.
4. The organic light-emitting display device of claim 2 , wherein the TFT comprises a plurality of TFTs of which corresponding said regions are separately defined by respective said gate guards.
5. The organic light-emitting display device of claim 2 , wherein the gate electrode comprises:
a gate center portion; and
a gate side portion extending from the gate center portion and forming a closed loop shape with the gate center portion.
6. The organic light-emitting display device of claim 5 , wherein the source-drain electrode passes through a central space of the closed loop shape to connect to the active layer via the central space.
7. The organic light-emitting display device of claim 1 , wherein the organic light-emitting diode comprises:
a pixel electrode electrically connected to the TFT;
an opposite electrode facing the pixel electrode; and
an emission layer interposed between the pixel electrode and the opposite electrode.