Donor substrate for laser induced thermal imaging method and method of fabricating organic light emitting display device using the same
View Patent ↗A donor substrate for a laser induced thermal imaging method and method of fabricating an organic light emitting display device using the same are provided. A transfer layer for a laser induced thermal imaging method is made of an organic material having a molecular weight of 500 to 70,000 to fabricate an organic light emitting display device having a uniform organic layer pattern. The invention also provides a method of fabricating an organic light emitting display device which may achieve a large-sized pixel region as well as improve the productivity of the organic light emitting display device.
1. A donor substrate for a laser induced thermal imaging method, comprising:
a base layer;
a light-to-heat conversion layer formed on the base layer; and
a transfer layer formed on the light-to-heat conversion layer,
wherein the transfer layer is made of an organic material having a molecular weight of 500 to 70,000.
2. The donor substrate according to claim 1 , wherein the transfer layer is made of an organic material having a molecular weight of 500 to 40,000.
3. The donor substrate according to claim 1 , wherein the transfer layer is made of a material selected from a group consisting of poly[(9,9-dioctylfluorene-2,7-diyl)], poly[(9,9-dihexylfluorene-2,7-diyl)-co-(anthracene-9,10-diyl)], poly[(9,9-dihexylfluorene-2,7-diyl)-co-(9,9-di-(5-phenyl)-N,N′-diphenyl-4,4′-diyl-1,4-diaminobenzene)] and poly[(9,9-dihexylfluorene-2,7-diyl)-co-(9-ethylcarbazole-2,7-diyl)].
4. The donor substrate according to claim 1 , wherein the base layer is formed of a glass substrate or a transparent polymer substrate, the transparent polymer substrate being made of one selected from a group consisting of polyester, polyacryl, polyepoxy, polyethylene, polypropylene and polystyrene.
5. The donor substrate according to claim 1 , wherein the light-to-heat conversion layer is made of a material selected from a group consisting of an organic material, metal, metal oxides, metal sulfides and alloys thereof which contain a light absorbing material.
6. The donor substrate according to claim 1 , further comprising an interlayer on the light-to-heat conversion layer.
7. The donor substrate according to claim 6 , wherein the interlayer is made of at least one selected from a group consisting of a gas generation layer, a buffer layer and metal reflection layer.