Substrate section for flexible display device, method of manufacturing the substrate section, and method of manufacturing organic light emitting display device including the substrate
View Patent ↗A substrate section for a flexible display device is disclosed. The substrate section includes: a first substrate, a second substrate disposed above a center region of the first substrate, a reinforcing layer disposed between the first and second substrates, configured to reinforce adhesion between the first and second substrates, and a barrier layer disposed above the second substrate and surrounding side surfaces of the second substrate and of the reinforcing layer.
1. A method of manufacturing a substrate section for a flexible display device, the method comprising:
preparing a first substrate configured to have at least one smooth surface;
forming a reinforcing layer above the first substrate;
forming a barrier rib on an edge region of the reinforcing layer;
forming a second substrate above only a center region of the reinforcing layer and not on the edge region, wherein the second substrate is surrounded by the barrier rib;
removing the barrier rib; and
removing portions of the edge region of the reinforcing layer, wherein the second substrate is not formed on the portions of the edge region; and
forming a barrier layer configured to cover a top surface of the second substrate and side surfaces of the reinforcing layer and of the second substrate, such that the barrier layer covering only an area of the first substrate exposed by removing the portions of the edge region of the reinforcing layer.
2. The method of claim 1 , wherein the first substrate is formed of glass.
3. The method of claim 1 , wherein the reinforcing layer is configured to reinforce adhesion between the first and second substrates.
4. The method of claim 3 , wherein the reinforcing layer is formed by depositing indium tin oxide (ITO) on the first substrate.
5. The method of claim 1 , wherein the second substrate is formed of a ductile synthetic resin.
6. The method of claim 1 , wherein the barrier layer is formed of an inorganic material.
7. The method of claim 1 , wherein the second substrate is formed by using a spin coating method.
8. The method of claim 1 , wherein the portions are removed via etching.
9. The method of claim 8 , wherein the portions are removed via wet-etching.
10. The method of claim 9 , wherein an etchant used on the reinforcing layer has an etch rate higher than that of the etchant used on the second substrate.
11. A method of manufacturing an organic light emitting display device, the method comprising:
preparing a first substrate configured to have at least one smooth surface;
forming a reinforcing layer above the first substrate;
forming a barrier rib on an edge region of the reinforcing layer;
forming a second substrate above only a center region of the reinforcing layer and not on the edge region, wherein the second substrate is surrounded by the barrier rib;
removing the barrier rib;
removing portions of the edge region of the reinforcing layer, wherein the second substrate is not formed on the portions of the edge region;
forming a barrier layer configured to cover a top surface of the second substrate and side surfaces of the reinforcing layer and of the second substrate, the barrier layer covering only an area of the first substrate exposed by removing the portions of the edge region of the reinforcing layer;
forming an organic light emitter on the barrier layer;
forming an encapsulation layer for sealing the organic light emitter; and
removing the first substrate and the reinforcing layer.