Donor film for thermal transfer, method of manufacturing the same, and method of manufacturing organic light-emitting device using the donor film
View Patent ↗A donor film that is easily handled in a process without adding a separate member (such as a tray) when an organic thin film is formed on a substrate by using a thermal transfer method is disclosed. In addition, a method of manufacturing the donor film and a method of manufacturing an organic light-emitting device using the donor film are disclosed. The donor film includes: a base film; a light-to-heat conversion (LTHC) layer on the base film; an interlayer on the LTHC layer and that includes a transfer region and a first protrusion corresponding to at least one edge of the LTHC layer; and a transfer layer on the interlayer and including an organic light-emitting material. A rigidity of the first protrusion is higher than a rigidity of the transfer region.
1. A donor film for thermal transfer, the donor film comprising:
a base film;
a light-to-heat conversion (LTHC) layer on the base film, the LTHC layer being configured to convert light to heat;
an interlayer on the LTHC layer, the interlayer comprising a transfer region and a first protrusion, the first protrusion corresponding to at least one edge of the LTHC layer, a rigidity of the first protrusion being higher than a rigidity of the transfer region; and
a transfer layer on the interlayer and comprising an organic material.
2. The donor film of claim 1 , wherein
the at least one edge of the LTHC layer comprises all edges of the LTHC layer, and
the first protrusion forms a closed loop.
3. The donor film of claim 1 , wherein
the interlayer further comprises a second protrusion corresponding to an edge of the LTHC layer opposite to the at least one edge of the LTHC layer, and
a rigidity of the second protrusion is higher than the rigidity of the transfer region.
4. The donor film of claim 3 , wherein a height of the second protrusion is equal to a height of the first protrusion.
5. The donor film of claim 1 , wherein the transfer layer corresponds to the transfer region.
6. A method of manufacturing a donor film for thermal transfer, the method comprising:
preparing a base film;
forming a light-to-heat conversion (LTHC) layer for converting light to heat, on the base film;
forming an interlayer on the LTHC layer, the forming of the interlayer comprising forming a transfer region and forming a first protrusion to correspond to at least one edge of the LTHC layer, a rigidity of the first protrusion being higher than a rigidity of the transfer region; and
forming a transfer layer comprising an organic material, on the interlayer.
7. The method of claim 6 , wherein the forming of the first protrusion comprises:
forming the first protrusion to correspond to all edges of the LTHC layer; and
forming the first protrusion in a form of a closed loop.
8. The method of claim 6 , wherein the forming of the transfer layer comprises forming the transfer layer to correspond to the transfer region.
9. The method of claim 6 , wherein the forming of the first protrusion further comprises applying ultraviolet light to a region corresponding to the first protrusion.
10. The method of claim 6 , wherein
the forming of the interlayer further comprises forming a second protrusion to correspond to an edge of the LTHC layer opposite to the at least one edge of the LTHC layer, and
a rigidity of the second protrusion is higher than the rigidity of the transfer region.
11. The method of claim 10 , wherein a height of the second protrusion is equal to a height of the first protrusion.
12. The method of claim 10 , wherein the forming of the second protrusion further comprises applying ultraviolet light to a region corresponding to the second protrusion.
13. A method of manufacturing an organic light-emitting device, the method comprising:
forming a donor film for thermal transfer, the forming of the donor film comprising:
preparing a base film;
forming a light-to-heat conversion (LTHC) layer for converting light to heat, on the base film;
forming an interlayer on the LTHC layer, the forming of the interlayer comprising forming a transfer region and forming a first protrusion to correspond to at least one edge of the LTHC layer, a rigidity of the first protrusion being higher than a rigidity of the transfer region; and
forming a transfer layer comprising an organic material, on the interlayer;
preparing a substrate comprising a first electrode;
covering the substrate with the donor film;
forming an organic light-emitting layer, the forming of the organic light-emitting layer comprising transferring the transfer layer of the donor film to the first electrode; and
forming a second electrode on the organic light-emitting layer.
14. The method of claim 13 , wherein the forming of the first protrusion comprises:
forming the first protrusion to correspond to all edges of the LTHC layer; and
forming the first protrusion in a form of a closed loop.
15. The method of claim 13 , wherein the forming of the transfer layer comprises forming the transfer layer to correspond to the transfer region.
16. The method of claim 13 , wherein the forming of the first protrusion further comprises applying ultraviolet light to a region corresponding to the first protrusion.
17. The method of claim 13 , wherein
the forming of the interlayer further comprises forming a second protrusion to correspond to an edge of the LTHC layer opposite to the at least one edge of the LTHC layer, and
a rigidity of the second protrusion is higher than the rigidity of the transfer region.
18. The method of claim 17 , wherein a height of the second protrusion is equal to a height of the first protrusion.
19. The method of claim 17 , wherein the forming of the second protrusion further comprises applying ultraviolet light to a region corresponding to the second protrusion.