Display device and organic luminescent display device

Patent metadata

Field	Value
Publication number	US-10600995-B2
Application number	US-201916298961-A
Country	US
Kind code	B2
Filing date	Mar 11, 2019
Priority date	Nov 29, 2012
Publication date	Mar 24, 2020
Grant date	Mar 24, 2020

Abstract

Provided is a display device including: a structure including a display area and a peripheral area surrounding the display area; and an inorganic encapsulation thin film disposed on the display and peripheral areas. The peripheral area includes at least one inorganic surface portion having a closed shape continuously.

First claim

What is claimed is:

1. A method of manufacturing an electroluminescent device, the method comprising:
forming a lower structure having a peripheral area and an emission area, the emission area being surrounded by the peripheral area and comprising an electroluminescent unit comprising a lower electrode, an electroluminescent layer on the lower electrode, and an upper electrode on the electroluminescent layer;
forming a passivation film on the upper electrode by an evaporation process such that an outline of the passivation film is located outside an outline of the upper electrode, the passivation film comprising an inorganic material having a substantially insulating property; and
forming a flexible encapsulation multilayer on the emission area and the peripheral area of the lower structure, the flexible encapsulation multilayer comprising at least three layers and having a bottom surface comprising only at least one inorganic material deposited by at least one non-evaporation process; and
wherein a surface of the peripheral area comprises an inorganic surface portion located outside the upper electrode in a plan view and substantially surrounding the emission area of the lower structure, and
wherein an entirety of the inorganic surface portion directly contacts the bottom surface of the flexible encapsulation multilayer.

2. The method of claim 1 , wherein the inorganic material included in the passivation film comprises a fluoride of an alkali metal.

3. The method of claim 1 , wherein the passivation film directly contacts the upper electrode and the bottom surface of the flexible encapsulation multilayer.

4. The method of claim 1 , further comprising:
forming an organic layer between the upper electrode and the passivation film by an evaporation process, the organic layer being conductive or semi-conductive and directly contacting the upper electrode.

5. The method of claim 4 , wherein the passivation film directly contacts the organic layer.

6. The method of claim 4 , wherein the passivation film directly contacts top and side surfaces of a structure comprising the upper electrode and the organic layer.

7. The method of claim 1 , wherein the lower electrode is an individual layer and the upper electrode is a common layer.

8. The method of claim 7 , wherein the outline of the upper electrode is located outside an outline of the lower electrode, and an outline of the flexible encapsulation multilayer is located outside the outline of the passivation film.

9. The method of claim 8 , wherein the inorganic surface portion is located between the outline of the flexible encapsulation multilayer and the outline of the passivation film.

10. The method of claim 1 , wherein the lower structure comprises a lower inorganic insulating film expanding below a surface of the lower structure to correspond to the emission area and the peripheral area, and a portion of the lower structure positioned between the inorganic surface portion and the lower inorganic insulating film comprises only one or more inorganic materials.

11. A method of manufacturing an electroluminescent device, the method comprising:
forming a lower structure having a peripheral area and an emission area, the emission area being surrounded by the peripheral area and comprising an electroluminescent unit comprising a lower electrode, an electroluminescent layer on the lower electrode, and an upper electrode on the electroluminescent layer;
forming an organic layer on the upper electrode by an evaporation process, the organic layer being conductive or semi-conductive and directly contacting top and side surfaces of the upper electrode such that an outline of the organic layer is located outside an outline of the upper electrode; and
forming a flexible encapsulation multilayer on the emission and peripheral areas of the lower structure, the flexible encapsulation multilayer comprising at least three layers and having a bottom surface comprising only at least one inorganic material deposited by at least one non-evaporation process; and
wherein a surface of the peripheral area comprises an inorganic surface portion located outside the upper electrode in a plan view and substantially surrounding the emission area of the lower structure, and
wherein an entirety of the inorganic surface portion directly contacts the bottom surface of the flexible encapsulation multilayer.

12. The method of claim 11 , further comprising:
forming a passivation film between the organic layer and the bottom surface of the flexible encapsulation multilayer via an evaporation process by using an inorganic material having a substantially insulating property.

13. The method of claim 12 , wherein the inorganic material included in the passivation film comprises fluoride of an alkali metal.

14. The method of claim 12 , wherein the passivation film directly contacts the organic layer and the bottom surface of the flexible encapsulation multilayer.

15. The method of claim 11 , wherein the bottom surface of the flexible encapsulation multilayer directly contacts side and top surfaces of a structure comprising the upper electrode and the organic layer.

16. The method of claim 11 , wherein the lower electrode is an individual layer and the upper electrode is a common layer.

17. The method of claim 16 , wherein the outline of the upper electrode is located outside an outline of the lower electrode, and an outline of the flexible encapsulation multilayer is located outside the outline of the organic layer.

18. The method of claim 17 , wherein the inorganic surface portion is located between the outline of the flexible encapsulation multilayer and the outline of the organic layer.

19. The method of claim 11 , wherein the lower structure comprises a lower inorganic insulating film expanding below a surface of the lower structure to correspond to the emission area and the peripheral area, and a portion of the lower structure positioned between the inorganic surface portion and the lower inorganic insulating film comprises only one or more inorganic materials.

20. A method of manufacturing an electroluminescent device, the method comprising:
forming a lower structure having a peripheral area and an emission area, the emission area being surrounded by the peripheral area and comprising an electroluminescent unit comprising a lower electrode, an electroluminescent layer on the lower electrode, and an upper electrode on the electroluminescent layer; and
forming a flexible encapsulation multilayer having a bottom surface on the emission and peripheral areas of the lower structure such that the bottom surface of the flexible encapsulation multilayer directly contacts a side surface of the upper electrode, the flexible encapsulation multilayer comprising at least three layers, the bottom surface of the flexible encapsulation multilayer comprising only at least one inorganic material deposited by at least one non-evaporation process; and
wherein a surface of the peripheral area comprises an inorganic surface portion located outside the upper electrode in a plan view and substantially surrounding the emission area of the lower structure; and
wherein an entirety of the inorganic surface portion directly contacts the bottom surface of the flexible encapsulation multilayer; and
further comprising forming an organic layer directly on the upper electrode by an evaporation process, the organic layer being conductive or semi-conductive.

21. The method of claim 20 , wherein an outline of the o

Assignees

• Samsung Display Co Ltd

Inventors

• Park Myoung-Seo

Classifications

• H01L27/3276

  Electricity · mapped topic

• H01L27/3244

  Electricity · mapped topic

• H01L51/5253 Primary

  Electricity · mapped topic

• H10K59/873 Primary

  Encapsulations · CPC title

• H10K50/844

  Encapsulations · CPC title