Method of manufacturing a display apparatus including a bending area

Patent metadata

Field	Value
Publication number	US-10355241-B2
Application number	US-201715815098-A
Country	US
Kind code	B2
Filing date	Nov 16, 2017
Priority date	Dec 16, 2016
Publication date	Jul 16, 2019
Grant date	Jul 16, 2019

Abstract

A method of manufacturing a display apparatus includes forming a plurality of display units including bending areas on a mother substrate. Each of the plurality of display units include a bending area configured to be bent about a bending axis. A protection film is attached to a lower surface of the mother substrate. The protection film includes a protection film base and an adhesive layer. An opening or a groove is formed corresponding to the bending area of each of the plurality of display units by removing at least a portion of the protection film. The mother substrate and the protection film are cut to separate the plurality of display units from each other. The mother substrate is bent about the bending axis. The removing of the at least a portion of the protection film is performed by a laser beam.

First claim

What is claimed is:

1. A method of manufacturing a display apparatus, the method comprising:
forming a plurality of display units on a mother substrate, the plurality of display units each including a bending area configured to be bent about a bending axis;
attaching a protection film to a lower surface of the mother substrate, the protection film comprising a protection film base and an adhesive layer;
forming an opening or a groove corresponding to the bending area of each the plurality of display units by removing at least a portion of the protection film;
cutting the mother substrate and the protection film to separate the plurality of display units from each other; and
bending the mother substrate about the bending axis,
wherein the removing of the at least a portion of the protection film is performed by a laser beam.

2. The method of claim 1 , wherein the removing of the at least a portion of the protection film comprises removing at least a portion of the protection film base.

3. The method of claim 1 , wherein the removing of the at least a portion of the protection film comprises removing at least a portion of the protection film base and at least a portion of the adhesive layer.

4. The method of claim 1 , wherein the laser beam has a top-hat waveform.

5. The method of claim 4 , wherein the laser beam is formed as a laser beam from a laser light source passing through an optical system comprising at least one of a beam shaper, a diffractive optical elements (DOE) lens, or a slit.

6. The method of claim 4 , wherein, using the laser beam to remove the at least a portion of the adhesive layer, a first laser beam and a second laser beam are used.

7. The method of claim 6 , wherein an intensity of the first laser beam is higher than an intensity of the second laser beam.

8. The method of claim 1 , wherein the laser beam is generated by a CO 2 laser.

9. The method of claim 1 , further comprising, before the removing of the at least a portion of the protection film, weakening an adhesiveness of the adhesive layer using an ultraviolet (UV) ray to a portion of the protection film in which the opening or the groove is to be formed.

10. The method of claim 1 , wherein a plurality of openings or grooves are formed in the protection film corresponding to the bending area, and an area of each of the plurality of openings or grooves is smaller than an area of the bending area.

11. The method of claim 1 , wherein an area of the opening or the groove of the protection film is greater than an area of the bending area.

12. The method of claim 1 , wherein each of the display units is disposed on a substrate in which the bending area is disposed between a first area and a second area, and comprises:
an inorganic insulation layer disposed on the substrate;
a conductive layer disposed on the inorganic insulation layer and overlapping the first area, the bending area, and the second area; and
an organic material layer disposed between the inorganic insulation layer and overlapping the bending area.

13. The method of claim 12 , wherein a portion of the inorganic insulation layer overlapping the organic material layer has a substantially flat upper surface.

14. The method of claim 12 , wherein the portion of the inorganic insulation layer overlapping the organic material layer has a groove or an opening, and the organic material layer fills at least a portion of the groove or the opening of the inorganic insulation layer.

15. The method of claim 1 , further comprising disposing a cushion layer between the first area and the second area after each of the display units is bent.

16. A method of manufacturing a display apparatus, the method comprising:
forming a plurality of display units on a substrate, each of the plurality of display units including a bending area;
disposing an adhesive layer on a lower surface of the substrate;
disposing a protection film base on a lower surface of the adhesive layer;
forming an opening or a groove by removing at least a portion of the protection film base;
separating the plurality of display units from each other to provide singular display units each disposed on a separate substrate;
bending the substrate at the bending area about a bending axis;
wherein the opening or the groove corresponds to the bending areas.

17. The method of claim 16 , wherein the removing of the at least a portion of the protection film base is performed by a laser beam.

Assignees

• Samsung Display Co Ltd

Inventors

• Ahn Jooseob
• Jeong Seongchae
• Han Inae
• Kim Hyojin
• Ryu Jekil
• Park Jaeseok
• Han Gyoowan

Classifications

• H01L51/5246

  Electricity · mapped topic

• H01L51/0097

  Electricity · mapped topic

• H01L51/56

  Electricity · mapped topic

• H01L2227/323

  Electricity · mapped topic

• Y02E10/549

  Organic PV cells · CPC title