Encapsulation for oled devices
AssigneesInstitute of Materials Research and Engineering, OSRAM Opto Semiconductor GmbH
InventorsEwald Karl Michael Guenther, Mark Dai Joong Auch
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Abstract
An encapsulation for an organic light emitting diode (OLED) (201) device is disclosed. The encapsulation includes a sealing dam (280) surrounding the cell region of the OLED device to support a cap. The sealing dam provides a sealing region between the edge of the cap and dam in which an adhesive is applied to seal the OLED device. The use of the sealing dam advantageously enables devices to be formed with narrower sealing widths.
Claims48
A device comprising:
- a substrate having a cell region;
- a sealing dam surrounding the cell region;
- a cap supported by the sealing dam;
- a sealing region abutting an outer surface of the sealing dam;
- and
- a sealant located in the sealing region, the sealant hermetically sealing the device, wherein the sealing dam includes at least one material from a group consisting of photoresist, spin-on glass, polyimide, polybenzoxazole, polyglutarimide, benzocyclobutene, polyethylene, polystyrene, polypropylene, silicon nitride and aluminum oxide.
A method for forming a device including encapsulating the device comprising:
- providing a substrate including a cell region;
- providing a cap with a sealing dam;
- mounting the cap on the substrate, wherein the sealing dam surrounds the cell region and forms a sealing region abutting an outer surface of the sealing dam;
- exerting a pressure to ensure the sealing dam contacts the substrate;
- and
- applying a sealant in the sealing region, the sealant hermetically sealing the cell region, wherein the sealing dam includes at least one material from a group consisting of photoresist, spin-on glass, polyimide, polybenzoxazole, polyglutarimide, benzocyclobutene, polyethylene, polystyrene, polypropylene, silicon nitride and aluminum oxide.
A method for forming a device including encapsulating the device comprising:
- providing a substrate including a cell region;
- forming a sealing dam on the substrate, wherein the sealing dam surrounds the cell region;
- mounting a cap on the sealing dam, wherein a sealing region abuts an outer surface of the sealing dam;
- exerting a pressure to ensure the cap contacts the sealing dam;
- and
- applying a sealant in the sealing region, the sealant hermetically sealing the cell region,
- wherein the sealing dam includes at least one material from a group consisting of photoresist, spin-on glass, polyimide, polybenzoxazole, polyglutarimide, benzocyclobutene, polyethylene, polystyrene, polypropylene, silicon nitride and aluminum oxide.
Dependencies are inferred from the claim text.