Flexible display device manufacturing method and manufacturing apparatus

Patent metadata

Field	Value
Publication number	US-10553795-B2
Application number	US-201816128711-A
Country	US
Kind code	B2
Filing date	Sep 12, 2018
Priority date	Nov 28, 2017
Publication date	Feb 4, 2020
Grant date	Feb 4, 2020

Abstract

A method of manufacturing a flexible display apparatus includes forming a flexible substrate on a carrier substrate, forming a display on a central portion of the flexible substrate, forming a protection layer covering the display, within an area of the flexible substrate, such that an edge portion of the flexible substrate is exposed outside of the protection layer, cutting a first edge portion of the flexible substrate that is exposed outside of the protection layer, except for a second remaining portion of the flexible substrate that is exposed outside of the protection layer, applying suction to the second portion of the flexible substrate, and separating the carrier substrate from the flexible substrate.

First claim

What is claimed is:

1. A method of manufacturing a flexible display apparatus, the method comprising:
forming a flexible substrate on a carrier substrate;
forming a display on a central portion of the flexible substrate;
forming a protection layer covering the display, within an area of the flexible substrate, such that an edge portion of the flexible substrate is exposed outside of the protection layer;
cutting a first edge portion of the flexible substrate that is exposed outside of the protection layer, except for a second remaining portion of the flexible substrate that is exposed outside of the protection layer;
applying suction to the second portion of the flexible substrate; and
separating the carrier substrate from the flexible substrate.

2. The method as claimed in claim 1 , further comprising forming a low-adhesive layer between the carrier substrate and the flexible substrate.

3. The method as claimed in claim 2 , wherein the low-adhesive layer has an adhesion ranging from about 1 gf/inch to about 5 gf/inch.

4. The method as claimed in claim 1 , further comprising applying lower suction to the protection layer when the suction is applied to the second portion of the flexible substrate.

5. The method as claimed in claim 4 , wherein the suction applied to the protection layer is less than or equal to half of the suction applied to the second portion of the flexible substrate.

6. The method as claimed in claim 1 , further comprising adjusting a location where the suction is applied to the second portion of the flexible substrate.

7. The method as claimed in claim 1 , wherein, in the separating of the carrier substrate, the carrier substrate is pulled so as to be separated from the flexible substrate while being held parallel to the flexible substrate.

8. The method as claimed in claim 1 , wherein, in the separating of the carrier substrate, one end of the carrier substrate is pulled first to separate the carrier substrate from the flexible substrate from the one end of the carrier substrate towards another end of the carrier substrate.

9. The method as claimed in claim 1 , wherein the cutting of the edge portion is performed by using any one of contact cutting using a cutting wheel and non-contact cutting using a laser beam.

10. The method as claimed in claim 1 , wherein the flexible substrate includes a polyimide material, and the carrier substrate includes a glass material.

11. An apparatus for manufacturing a flexible display device having a protection layer covering a display on a flexible substrate, the apparatus comprising:
a first suction section configured to apply suction to the protection layer; and
a second suction section configured to apply suction to a carrier substrate, which is coupled to the flexible substrate, on a side opposite to the display and pull and separate the carrier substrate from the flexible substrate,
wherein the first suction section includes:
a low-pressure section configured to apply relatively low suction to the protection layer over the display; and
a high-pressure section configured to apply relatively high suction to an edge portion of the flexible substrate extending beyond the display and exposed outside the protection layer.

12. The apparatus as claimed in claim 11 , wherein the high-pressure section is separate from the low-pressure section, and distances between the high-pressure section and the low-pressure section are adjustable.

13. The apparatus as claimed in claim 11 , wherein the second suction section includes:
a reciprocating driver configured to move the carrier substrate in a direction in which the suction power of the first suction section is applied, and in an opposite direction; and
a tilt driver configured to pull one side of the carrier substrate to tilt the carrier substrate.

14. The apparatus as claimed in claim 11 , further comprising a cutter configured to cut edge portions of the flexible substrate.

15. The apparatus as claimed in claim 14 , wherein the cutter includes any one of a cutting wheel and a laser irradiator.

16. The apparatus as claimed in claim 11 , wherein a low-adhesive layer is arranged between the carrier substrate and the flexible substrate, and when the carrier substrate is separated from the flexible substrate by the first and second suction sections, the low-adhesive layer is separated from the flexible substrate together with the carrier substrate.

17. The apparatus as claimed in claim 16 , wherein the low-adhesive layer has an adhesion ranging from about 1 gf/inch to about 5 gf/inch.

18. The apparatus as claimed in claim 11 , wherein the suction of the low-pressure section is less than or equal to half of the suction of the high-pressure section.

19. The apparatus as claimed in claim 11 , wherein the suction of the high-pressure section is in inverse proportion to an area of the edge portion.

20. The apparatus as claimed in claim 11 , wherein the flexible substrate includes a polyimide material, and the carrier substrate includes a glass material.

Assignees

• Samsung Display Co Ltd

Inventors

• Kang Byunghoon
• Moon Seungjun
• Shin Heekyun
• Lee Minwoo
• Cho Woojin

Classifications

• B32B2457/20

  Displays, e.g. liquid crystal displays, plasma displays · CPC title

• H01L2251/5338

  Electricity · mapped topic

• H01L2227/326

  Electricity · mapped topic

• B32B43/006 Primary

  Delaminating · CPC title

• H01L51/56

  Electricity · mapped topic