Display apparatus and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-10074826-B2
Application number	US-201615270536-A
Country	US
Kind code	B2
Filing date	Sep 20, 2016
Priority date	Oct 6, 2015
Publication date	Sep 11, 2018
Grant date	Sep 11, 2018

Abstract

A display apparatus includes a substrate, a display element disposed on the substrate, a first inorganic film layer disposed on the display element, a first organic film layer disposed on the first inorganic film layer, a second organic film layer disposed on the first organic film layer and including a wrinkled upper surface, and a second inorganic film layer disposed on the second organic film layer and including a shape corresponding to the wrinkled upper surface of the second organic film layer.

First claim

What is claimed is:

1. A display apparatus comprising:
a substrate;
a display element disposed on the substrate;
a first inorganic film layer covering the display element;
a first organic film layer disposed directly on the first inorganic film layer;
a second organic film layer disposed on the first organic film layer and comprising a wrinkled upper surface and a flat lower surface contacting a flat upper surface of the first organic film layer such that a thickness of the second organic film layer varies; and
a second inorganic film layer disposed on the second organic film layer and comprising a shape corresponding to the wrinkled upper surface of the second organic film layer.

2. The display apparatus of claim 1 , wherein the second organic film layer comprises one of hexamethyldisiloxane and polyacrylate.

3. The display apparatus of claim 1 , wherein a minimum thickness of the first organic film layer is greater than a maximum thickness of the second organic film layer.

4. The display apparatus of claim 1 , wherein a thickness of the second inorganic film layer is uniform.

5. The display apparatus of claim 1 , wherein a hardness of the first organic film layer is greater than a hardness of the second organic film layer.

6. A method of manufacturing a display apparatus, the method comprising:
forming a display element on a substrate;
forming a first inorganic film layer to cover the display element;
forming a first organic film layer on the first inorganic film layer, the first organic film layer comprising a flat upper surface;
forming a second organic film layer directly on the first organic film layer; and
forming a second inorganic film layer on the second organic film layer, such that an upper surface of the second organic film is uneven and a lower surface of the second organic film is flat such that a thickness of the second organic film layer varies, and then the second inorganic film layer comprises a shape corresponding to the uneven upper surface of the second organic film layer.

7. The method of claim 6 , wherein the forming the second organic film layer comprises forming the second organic film layer using one of hexamethyldisiloxane and polyacrylate.

8. The method of claim 6 ,
wherein the second organic film layer comprising a hardness lower than a hardness of the first organic film layer.

9. The method of claim 8 , wherein:
the forming the first organic film layer comprises forming the first organic film layer including hexamethyldisiloxane according to a chemical vapor deposition method in a first ratio of N 2 O in an entire gas; and
the forming the second organic film layer comprises forming the second organic film layer including the hexamethyldisiloxane according to the chemical vapor deposition method in a second ratio of N 2 O, which is different from the first ratio of N 2 O in the entire gas.

10. The method of claim 6 , wherein the forming the second organic film layer comprises forming the second organic film layer using acrylate.

11. The method of claim 8 , wherein:
the forming the first organic film layer comprises forming an acrylate layer and irradiating the acrylate layer with a first illumination of ultraviolet light to harden the acrylate layer; and
the forming the second organic film layer comprises forming another acrylate layer and irradiating the another acrylate layer with a second illumination of ultraviolet light, which is less than the first illumination of ultraviolet light, to harden the another acrylate layer.

12. The method of claim 8 , wherein:
the forming the first organic film layer comprises forming an acrylate layer and irradiating the acrylate layer with ultraviolet light for a first time period to harden the acrylate layer; and
the forming the second organic film layer comprises forming another acrylate layer and irradiating the another acrylate layer with the ultraviolet light for a second time period, which is shorter than the first time period, to harden the another acrylate layer.

13. The method of claim 8 , wherein the forming the second organic film layer comprises forming the second organic film layer having a maximum thickness which is less than a minimum thickness of the first organic film layer.

14. A display apparatus comprising:
a substrate;
a display element disposed over the substrate;
a first buffer organic layer covering the display element and comprising wrinkles provided on an upper surface thereof and not provided on a lower surface thereof such that a thickness of the first buffer organic layer varies;
a first buffer inorganic layer disposed over the first buffer organic layer and having a shape corresponding to a shape of the upper surface of the first buffer organic layer; and
a first organic film layer disposed over the first buffer inorganic layer and including a flattened upper surface.

15. The display apparatus of claim 14 , further comprising:
a second buffer organic layer disposed over the first organic film layer and including wrinkles provided on an upper surface thereof; and
a second buffer inorganic layer disposed over the second buffer organic layer and having a shape corresponding to a shape of the upper surface of the second buffer organic layer.

16. The display apparatus of claim 14 , further comprising:
an inorganic film layer disposed over the first organic film layer and including a flattened upper surface.

17. The display apparatus of claim 14 , wherein the first buffer organic layer comprises one of hexamethyldisiloxane acid and polyacylate.

18. The display apparatus of claim 15 , wherein the second buffer organic layer comprises one of hexamethyldisiloxane acid and polyacylate.

19. The display apparatus of claim 15 , wherein the first buffer inorganic layer and the second buffer inorganic layer comprise a uniform thickness.

20. The display apparatus of claim 15 , wherein a hardness of the first organic film layer is greater than a hardness of the second buffer organic layer.

21. A method of manufacturing a display apparatus, the method comprising:
forming a display element over a substrate;
forming a first buffer organic layer covering the display element, the first buffer organic layer comprising wrinkles provided on an upper surface thereof and not provided on a lower surface thereof such that a thickness of the first buffer organic layer varies;
forming a first buffer inorganic layer over the first buffer organic layer, the first buffer inorganic layer comprising a shape corresponding to a shape of the upper surface of the first buffer organic layer; and
forming a first organic film layer over the first buffer inorganic layer, the first organic film layer comprising a flattened upper surface.

22. The method of claim 21 , wherein:
the forming the first organic film layer comprises forming the first organic film layer comprising hexamethyldisiloxane acid according to a chemical vapor deposition method using a first ratio of N 2 O in an entire gas; and
the forming the first buffer organic layer comprises forming the first buffer organic layer comprising hexamethyldisiloxane acid according to the chemical vapor deposition method using a second ratio of N 2 O in the entire gas.

23. The method of claim 21 , wherein the forming the first buffer organic layer comprises forming the first buffer organic layer using acrylate.

24. The method of claim 21 , wherein:
the forming the first organic film layer

Assignees

• Samsung Display Co Ltd

Inventors

• Park Eungseok
• Oh Minho
• Yun Wonmin
• Lee Byoungduk
• Chung Yunah
• Cho Yoonhyeung
• Ju Yongchan

Classifications

• H01L27/3244

  Electricity · mapped topic

• H01L2227/323

  Electricity · mapped topic

• H01L51/5253 Primary

  Electricity · mapped topic

• H01L27/3211

  Electricity · mapped topic

• H01L2251/5338

  Electricity · mapped topic