Donor substrates and methods of manufacturing organic light emitting display devices using donor substrates
A donor substrate may include a base layer, a light to heat conversion layer disposed on the base layer, a buffer layer disposed on the light to heat conversion layer, an organic transfer layer disposed on the buffer layer, and a tightening member disposed on a peripheral portion of the organic transfer layer. The tightening member may include an adhesive film having an adhesion strength controlled by an irradiation of an ultraviolet ray. Process failures for manufacturing an organic light emitting display device may be prevented by the donor substrate, so that the organic light emitting display device may ensure improved performances.
1. A donor substrate comprising:
a base layer;
a light to heat conversion layer disposed on the base layer;
an organic transfer layer disposed on the light to heat conversion layer; and
a tightening member disposed on a peripheral portion of the organic transfer layer, the tightening member including an adhesive film having an adhesion strength that changes when the adhesive film is exposed to an ultraviolet (UV) ray, the tightening member having a first surface that contacts the peripheral portion of the organic transfer layer, the tightening member having a second surface that faces a display substrate to which an emitting structure is provided from the organic transfer layer, the adhesive film formed only on the second surface of the tightening member.
2. The donor substrate of claim 1 , wherein the tightening member has a rectangular ring shape, a rectangular frame shape, a circular ring shape, an elliptical ring shape or a polygonal ring shape.
3. The donor substrate of claim 1 , wherein the tightening member has a horizontal width and a longitudinal width same as a horizontal width and a longitudinal width of the organic transfer layer, respectively.
4. The donor substrate of claim 1 , wherein the tightening member has an inner horizontal width and an inner longitudinal width same as a horizontal width and a longitudinal width of a display substrate, respectively.
5. The donor substrate of claim 4 , wherein the tightening member completely covers edges of the display substrate.
6. The donor substrate of claim 1 , wherein the adhesive film of the tightening member includes acryl-based polymer having an adhesion strength that decreases when the tightening member is exposed to of the ultraviolet ray.
7. The donor substrate of claim 6 , wherein the adhesive film of the tightening member includes oligourethan acrylate or ester acrylate.
8. The donor substrate of claim 1 , wherein the tightening member includes a base film disposed between the organic transfer layer and the adhesive film.
9. The donor substrate of claim 8 , wherein the base film includes an ultraviolet ray transmitable film.
10. The donor substrate of claim 9 , wherein the base film includes polyethyleneterephthalate (PET), polyethylenenaphthalate (PEN) or polyolefin.