Methods of fabricating organic light emitting display and donor substrate

1. A method of fabricating an organic light emitting display (OLED), comprising:

preparing a base substrate of a donor substrate;

forming a light to heat conversion layer and a transfer layer on the base substrate;

preparing a donor substrate including performing a dry cleaning process after forming the transfer layer, wherein pressure applied on a surface of the transfer layer during the dry cleaning process is not more than 0.7 Mpa;

preparing a substrate, on which the transfer layer of the donor substrate is to be transferred;

laminating the donor substrate and the substrate; and

patterning the transfer layer by irradiating a laser to transfer the transfer layer on the substrate.

2. A method of fabricating a donor substrate, comprising:

preparing a base substrate;

forming a light to heat conversion layer and a transfer layer on the base substrate; and

performing a dry cleaning process after forming the transfer layer, wherein pressure applied on a surface of the transfer layer during the dry cleaning process is not more than 0.7 Mpa.

3. The method according to claim 2 , wherein the dry cleaning process is performed by any one of a CO2 method, an ultrasonic method, and a laser pulse method.

4. The method according to claim 2 , wherein when the base substrate is flexible, the dry cleaning process is performed after fixing a donor substrate support to a rear surface of the base substrate.

5. The method according to claim 2 , wherein the dry cleaning process is performed using a dry cleaning source ejected from a point source.

6. The method according to claim 2 , wherein the dry cleaning process is performed using a dry cleaning source ejected from a linear source.

7. The method according to claim 3 , wherein the CO2 method removes contaminants by sublimating solid CO2 to collide the sublimated CO2 on the substrate.

8. The method according to claim 3 , wherein the CO2 method is performed in a humidity atmosphere of not more than 30%.

9. The method according to claim 3 , wherein the ultrasonic method removes particles by generating ultrasonic wave on the surface of the transfer layer of the donor substrate to separate and absorb the particles.

10. The method according to claim 3 , wherein the laser pulse method removes particles existing on the surface of the substrate by irradiating a laser pulse on the surface of the transfer layer of the donor substrate.

11. The method according to claim 3 , wherein the laser pulse method removes particles existing on the surface of the substrate by vibrating the air around the donor substrate to float the particles.

12. The method according to claim 11 , wherein the floated particles are removed by any one of a blowing method and an absorption method.

13. The method according to claim 2 , wherein the donor substrate is framed.

14. The method according to claim 2 , wherein the donor substrate is a roll type.

15. The method according to claim 2 , wherein the transfer layer of the donor substrate is an emission layer of the OLED.

16. The method according to claim 15 , wherein the transfer layer of the donor substrate further comprises at least one layer selected from a group of consisting of a hole injection layer, a hole transport layer, a hole blocking layer and an electron injection layer.

17. The method according to claim 2 , further comprising a buffer layer interposed between the light to heat conversion layer and the transfer layer.

18. The method according to claim 13 , further comprising performing the dry cleaning processes after framing the donor substrate, forming the light to heat conversion layer, and forming the buffer layer, respectively.

19. The method according to claim 17 , further comprising performing the dry cleaning processes after framing the donor substrate, forming the light to heat conversion layer, and forming the buffer layer, respectively.