Organic light-emitting diode (OLED) display and method of manufacturing the same

1. An organic light-emitting diode (OLED) display, comprising:

a first substrate including a display area;

a display unit formed in the display area and including an insulating layer;

a second substrate formed over the display unit; and

a sealant material interposed between the first and second substrates and substantially sealing the first and second substrates to each other,

wherein at least one hole is formed in a first portion of the insulating layer,

wherein at least one recess is formed in a second portion of the insulating layer,

wherein the sealant substantially fills the hole and the recess, and

wherein the vertical height of the recess is less than the vertical height of the hole.

2. The OLED display of claim 1 , wherein the at least one hole comprises a plurality of holes, wherein the at least one recess comprises a plurality of recesses respectively corresponding to and adjacent to the holes, and wherein the sealant is substantially filled in each of the holes and the recesses.

3. The OLED display of claim 1 , wherein the recess is substantially parallel to the first substrate.

4. The OLED display of claim 1 , wherein the display unit comprises:

a thin film transistor (TFT) including i) an active layer, ii) a gate insulating layer formed over the active layer, and iii) a gate electrode, a source electrode, and a drain electrode formed over the active layer; and

an interlayer insulating layer interposed i) between the gate electrode and the source electrode and ii) between the gate electrode and the drain electrode,

wherein the insulating layer comprises the gate insulating layer and the interlayer insulating layer, and

wherein the recess is formed in the interlayer insulating layer.

5. The OLED display of claim 4 , further comprising a buffer layer formed directly on the first substrate, wherein the insulating layer further comprises the buffer layer.

6. The OLED display of claim 1 , wherein the hole is connected to the recess.

7. The OLED display of claim 1 , wherein the hole is significantly greater in dimension than the recess.

8. An organic light-emitting diode (OLED) display, comprising:

a substrate including a display area and a peripheral area surrounding the display area;

a plurality of pixels formed in the display area, wherein each pixel comprises an OLED;

an insulating layer formed in the display area and the peripheral area; and

a sealing thin film formed over the insulating layer,

wherein at least one hole is defined in a first portion of the insulating layer in the peripheral area,

wherein at least one recess is defined in a second portion of the interlayer insulating layer in the peripheral area,

wherein the sealing thin film is formed in the hole and the recess, and

wherein the vertical height of the recess is less than the vertical height of the hole.

9. The OLED display of claim 8 , wherein the insulating layer comprises:

a buffer layer formed over the substrate;

a gate insulating layer formed over the buffer layer; and

an interlayer insulating layer formed over the gate insulating layer.

10. The OLED display of claim 9 , wherein the recess is formed only in the interlayer insulating layer and wherein the vertical height of the recess is less than the vertical height of the interlayer insulating layer.

11. The OLED display of claim 8 , wherein the recess is substantially parallel to the substrate.

12. The OLED display of claim 8 , wherein the at least one hole comprises a plurality of holes, wherein the at least one recess comprises a plurality of recesses corresponding to the holes, and wherein the sealing thin film formed in each of the holes and the recesses.

13. The OLED display of claim 8 , wherein the holes are arranged in a direction from the display area to an edge of the substrate.