Organic light emitting display and method of fabricating the same
View Patent ↗An organic light emitting display and method of fabricating the same are provided. The organic light emitting display and the method of fabricating the same in accordance with the present invention is capable of preventing an organic layer pattern from being cut due to a step between a first electrode and an inorganic pixel defining layer by forming an inorganic pixel defining layer having an opening for exposing at least a portion of the first electrode to a small thickness using a deposition method. In addition, since the first electrode and the organic layer pattern are closely adhered during a transfer process to enable the transfer process using a laser beam having low energy, thereby improving transfer efficiency, improving luminous efficiency of the OLED, and increasing lifetime of the OLED.
1. An organic light emitting display, comprising:
a substrate;
a first electrode formed on the substrate;
an inorganic pixel defining layer formed on the first electrode and having an opening for exposing at least a portion on the first electrode;
an organic layer pattern located on the first electrode and both ends of the inorganic pixel defining layer having the opening, and having at least an emission layer; and
a second electrode formed on the organic layer pattern,
wherein the organic layer pattern comprises two peaks, the peaks being located where a distance between the organic layer pattern and the substrate is greatest, and the organic layer pattern extends toward the substrate on each side of each peak,
wherein the inorganic pixel defining layer is formed by a deposition method,
wherein the second electrode contacts the inorganic pixel defining layer, and
wherein a maximum thickness of a portion of the inorganic pixel defining layer disposed between and contacting the first electrode and the organic layer pattern is equal to a maximum thickness of a remaining portion of the inorganic pixel defining layer.
2. The organic light emitting display according to claim 1 , wherein the inorganic pixel defining layer is formed by any one of a chemical vapor deposition (CVD) method and a physical vapor deposition (PVD) method.
3. The organic light emitting display according to claim 2 , wherein the inorganic pixel defining layer is formed by a sputtering method.
4. The organic light emitting display according to claim 1 , wherein the inorganic pixel defining layer is made of one material selected from a group consisting of an amorphous silicon layer, a silicon oxide layer, a silicon nitride layer, and a silicon oxynitride layer.
5. The organic light emitting display according to claim 1 , wherein the maximum thickness of the inorganic pixel defining layer is 100 Å to less than 1000 Å.
6. The organic light emitting display according to claim 5 , wherein the inorganic pixel defining layer comprises an amorphous silicon layer or a silicon nitride layer.