Flexible display apparatus and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-11276831-B2
Application number	US-201916578408-A
Country	US
Kind code	B2
Filing date	Sep 23, 2019
Priority date	Nov 9, 2018
Publication date	Mar 15, 2022
Grant date	Mar 15, 2022

Abstract

A method of manufacturing a flexible display apparatus includes: preparing a substrate; forming a first charge adhesive layer having a first charge on the substrate; forming a second charge adhesive layer having a second charge, which is opposite to the first charge, on the first charge adhesive layer; forming a first charge adhesive pattern and a second charge adhesive pattern by removing an edge of each of the first charge adhesive layer and the second charge adhesive layer; forming a flexible substrate on the substrate on which the first charge adhesive pattern and the second charge adhesive pattern are formed; forming a display unit on the flexible substrate; cutting the substrate, the first charge adhesive pattern, the second charge adhesive pattern, the flexible substrate, and the display unit along a cutting line; and separating the substrate and the flexible substrate.

First claim

What is claimed is:

1. A method of manufacturing a flexible display apparatus, the method comprising:
preparing a substrate;
forming a first charge adhesive layer having a first charge on the substrate;
forming a second charge adhesive layer having a second charge, which is opposite the first charge, on the first charge adhesive layer;
forming a first charge adhesive pattern and a second charge adhesive pattern by removing an edge of each of the first charge adhesive layer and the second charge adhesive layer;
forming a flexible substrate on the substrate on which the first charge adhesive pattern and the second charge adhesive pattern are formed;
forming a display unit on the flexible substrate;
cutting the substrate, the first charge adhesive pattern, the second charge adhesive pattern, the flexible substrate, and the display unit along a cutting line; and
separating the substrate and the flexible substrate,
wherein:
the first charge adhesive layer comprises graphene oxide; and
the second charge adhesive layer comprises montmorillonite, molybdenum disulfide, or hexagonal boron nitride (hBN).

2. The method of claim 1 , wherein the forming of the first charge adhesive pattern and the second charge adhesive pattern removes a portion of each of the first charge adhesive layer and the second charge adhesive layer by spraying a gas in a plasma state in which nitrogen and air are mixed.

3. The method of claim 1 , wherein a portion of a top surface of the substrate is exposed by the forming of the first charge adhesive pattern and the second charge adhesive pattern.

4. The method of claim 1 , wherein the flexible substrate contacts the portion of the substrate which is exposed by the first charge adhesive pattern and the second charge adhesive pattern, by the forming of the flexible substrate.

5. The method of claim 1 , wherein the forming of the flexible substrate forms the flexible substrate by coating a polymer material on an area greater than an area occupied by the first charge adhesive pattern and the second charge adhesive pattern.

6. The method of claim 1 , wherein the cutting line is defined to overlap the first charge adhesive pattern and the second charge adhesive pattern on a plane.

7. The method of claim 1 , wherein the cutting line has a closed loop shape on a plane, and is defined along an edge of each of the first charge adhesive pattern and the second charge adhesive pattern.

8. The method of claim 1 , wherein the second charge adhesive layer remains on the flexible substrate by separating the substrate from the flexible substrate.

9. A method of manufacturing a flexible display apparatus, the method comprising:
preparing a substrate;
forming a lower first charge adhesive layer having a first charge on the substrate;
forming a lower second charge adhesive layer having a second charge, which is opposite to the first charge, on the lower first charge adhesive layer;
forming an upper first charge adhesive layer having the first charge on the lower second charge adhesive layer;
forming an upper second charge adhesive layer having the second charge on the upper first charge adhesive layer;
forming a lower first charge adhesive pattern, a lower second charge adhesive pattern, an upper first charge adhesive pattern, and an upper second charge adhesive pattern by removing an edge of each of the lower first charge adhesive layer, the lower second charge adhesive layer, the upper first charge adhesive layer, and the upper second charge adhesive layer;
forming a flexible substrate on the substrate on which the lower first charge adhesive pattern, the lower second charge adhesive pattern, the upper first charge adhesive pattern, and the upper second charge adhesive pattern are formed;
forming a display unit on the flexible substrate;
cutting the substrate, the lower first charge adhesive pattern, the upper second charge adhesive pattern, the upper first charge adhesive pattern, the upper second charge adhesive pattern, the flexible substrate, and the display unit along a cutting line; and
separating the substrate and the flexible substrate,
wherein:
the lower first charge adhesive layer comprises graphene oxide;
the upper first charge adhesive layer comprises polyethyleneimine (PEI); and
each of the lower second charge adhesive layer and the upper second charge adhesive layer comprises montmorillonite, molybdenum disulfide, or hexagonal boron nitride (hBN).

10. The method of claim 9 , wherein the upper first charge adhesive pattern and the upper second charge adhesive pattern remain on the flexible substrate by separating the substrate from the flexible substrate.

11. The method of claim 9 , wherein the lower second charge adhesive pattern, the upper first charge adhesive pattern, and the upper second charge adhesive pattern remain on the flexible substrate by separating the substrate from the flexible substrate.

Assignees

• Samsung Display Co Ltd

Inventors

• Shin Heekyun
• Kang Byunghoon
• Kim Youngjun
• An Sumin
• Cho Woojin
• Moon Seungjun
• Park Jeongmin
• Seo Dongkyun
• Sim Junho

Classifications

• H10K59/873

  Encapsulations · CPC title

• H10K77/111

  Flexible substrates · CPC title

• H10K71/80 Primary

  using temporary substrates · CPC title

• Y02P70/50

  Manufacturing or production processes characterised by the final manufactured product · CPC title

• B32B2255/28

  Multiple coating on one surface · CPC title