Method of manufacturing substrate, method of manufacturing organic electroluminescent display device using the method, and organic electroluminescent display device
View Patent ↗A method of manufacturing an organic electroluminescent display device includes preparing an auxiliary substrate, which has a flat side; forming a first protective layer on the auxiliary substrate; forming an organic electroluminescent unit on the first protective layer; bonding a flexible main substrate onto the organic electroluminescent unit; and etching the auxiliary substrate to remove the same.
1. An organic electroluminescent display device comprising:
a main substrate, which has a flat side and is flexible;
a second protective layer, which is formed on the main substrate;
an organic electroluminescent unit, which is formed on the second protective layer;
a first protective layer, which is formed on the organic electroluminescent unit;
a sealing portion, which hermetically seals the organic electroluminescent unit;
a flexible sub-substrate bonded onto the first protective layer; and
an organic protection layer formed on the flexible sub-substrate.
2. The organic electroluminescent display device of claim 1 , wherein the first protective layer comprises a plurality of layers to prevent permeation of oxygen, moisture, and a liquid etchant.
3. The organic electroluminescent display device of claim 1 , wherein the flexible sub-substrate is made of a synthetic resin material or glass.
4. The organic electroluminescent display device of claim 1 , wherein the organic electroluminescent unit comprises:
a second electrode layer, which is formed on the second protective layer;
an organic layer, which is formed on the second electrode layer;
a first electrode layer, which is formed on the organic layer; and
a thin-film transistor layer, which is connected to the first electrode layer penetrating through an insulation layer to drive the first electrode layer.
5. The organic electroluminescent display device of claim 4 , wherein the thin-film transistor layer is positioned on the second electrode layer far away from the main substrate.
6. An organic electroluminescent display device comprising:
a main substrate, which has a flat side and is flexible;
a second protective layer, which is formed on the main substrate;
an organic electroluminescent unit, which is formed on the second protective layer;
a first protective layer, which is formed on the organic electroluminescent unit;
a sealing portion, which hermetically seals the organic electroluminescent unit; and
an organic protection layer formed on the first protective layer.
7. The organic electroluminescent display device of claim 1 , wherein the main substrate comprises a plurality of layers to prevent permeation of oxygen and moisture.
8. The organic electroluminescent display device of claim 1 , wherein the main substrate has a thickness of 20-500 μm.
9. The organic electroluminescent display device of claim 1 , wherein the flexible sub-substrate has a thickness of 20-500 μm.