Doner 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 method of manufacturing an organic light emitting display device, the method comprising:
forming a display substrate including a switching device, a first electrode and a pixel defining layer;
forming a donor substrate including a base layer, a light to heat conversion layer formed on the base layer, an organic transfer layer formed on the light to heat conversion layer, and a tightening member having an adhesive film and disposed on a peripheral portion of the organic transfer layer, an adhesion strength of the adhesive film being changed when exposed to an ultraviolet (UV) ray;
combining the donor substrate with the display substrate with the tightening member interposed between the donor and the display substrates;
irradiating the donor substrate with a laser beam to form an organic light emitting structure on the first electrode in a display region of the display substrate from the organic transfer layer of the donor substrate;
irradiating the tightening member with a ultraviolet ray; and
separating the donor substrate from the display substrate.
2. The method 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 method of claim 2 , wherein the tightening member has an outer horizontal width and an outer longitudinal width same as a horizontal width and a longitudinal width of the display substrate, respectively.
4. The method of claim 3 , wherein both surfaces of the adhesive film of the tightening member have adhesion strengths.
5. The method of claim 2 , wherein the tightening member has an inner horizontal width and an inner longitudinal width same as a horizontal width and a longitudinal width of the display substrate, respectively.
6. The method of claim 5 , wherein one surface of the adhesive film of the tightening member has an adhesion strength, and an inner surface of the adhesive film contacting the display substrate has an adhesion strength.
7. The method of claim 1 , wherein separating the donor substrate from the display substrate includes selectively irradiating the tightening member with an ultraviolet ray.