Organic light emitting display (OLED) having a gas vent groove to decrease edge open failures

1. A method of fabricating an Organic Light Emitting Display (OLED), the method comprising:

forming a first electrode on a substrate;

forming an insulating layer on the first electrode;

forming a pixel defining layer having at least one gas vent groove by patterning the insulating layer;

forming an organic layer on the pixel defining layer, the organic layer being divided by the pixel defining layer and including at least an emission layer, by applying a Laser-Induced Thermal Imaging (LITI) method to the exposed first electrode and the pixel defining layer; and

forming a second electrode on the organic layer.

2. The method according to claim 1 , wherein the first electrode is formed of a transparent electrode including one material selected from a group consisting of Indium Tin Oxide (ITO), Indium Zinc Oxide (IZO) and In 2 O 3 .

3. The method according to claim 1 , wherein the gas vent groove is formed by either a wet or dry etching method.

4. The method according to claim 1 , wherein the pixel defining layer is formed of either an organic or inorganic insulating layer.

5. The method according to claim 1 , wherein the gas vent groove of the pixel defining layer is arranged in a pixel edge region.

6. The method according to claim 5 , wherein the gas vent groove arranged in the pixel edge region has a depth of 1 μm through a cross-sectional thickness of the pixel defining layer.

7. The method according to claim 5 , wherein the gas vent groove arranged in the pixel edge region is connected to adjacent pixels.

8. The method according to claim 5 , wherein the gas vent groove has a width within 30% of one of an entire horizontal or vertical length of the pixel region.

9. The method according to claim 1 , further comprising a thin film transistor arranged on the substrate.

10. The method according to claim 1 , wherein the second electrode is formed of a transparent or semi-transparent electrode including one material selected from a group consisting of Ca, Mg, MgAg, Ag, an Ag alloy, Al and an Al alloy.

11. An Organic Light Emitting Display (OLED) fabricated according to the method of claim 2 , comprised of:

the pixel defining layer is arranged on the first electrode;

the gas vent groove of the pixel defining layer is arranged in a pixel edge region and being connected to at least one neighboring pixel;

the emission layer is arranged on an exposed first electrode region; and

the second electrode is formed of a transparent or semi-transparent electrode including one material selected from a group consisting of Ca, Mg, MgAg, Ag, an Ag alloy, Al and an Al alloy.