FLEXIBLE DISPLAY DEVICE AND METHOD OF MANUFACTURING THE SAME

• US 20150163911A1
• Filed: 08/19/2014
• Published: 06/11/2015
• Est. Priority Date: 12/10/2013
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Lee, Dae-Geun
• Granted Patent: US 9,741,971 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B32B 2457/20 Displays, e.g. liquid crystal displays, plasma displays
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass
• CPC Class Codes: H10K 71/80 using temporary substrates
• CPC Class Codes: H10K 77/111 Flexible substrates
• CPC Class Codes: Y02E 10/549 Organic PV cells
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product
• CPC Class Codes: Y10T 29/49128 Assembling formed circuit to base

Abstract

A method for manufacturing a flexible display device by forming a flexible base substrate on a carrier substrate, the flexible base substrate having a display region and a non-display region, forming a display unit comprising a plurality of pixels at the display region, separating the flexible base substrate from the carrier substrate, forming an adhesive layer under the flexible base substrate, forming a flexible carrier film under the adhesive layer, forming a pressed region of the adhesive layer by partially pressing the adhesive layer, and mounting a driving circuit at a portion of the non-display region overlapping the pressed region.

Claims

1. A method for manufacturing a flexible display device, the method comprising:

forming a flexible base substrate on a carrier substrate, the flexible base substrate having a display region and a non-display region;

forming a display unit comprising a plurality of pixels at the display region;

separating the flexible base substrate from the carrier substrate;

forming an adhesive layer under the flexible base substrate;

forming a flexible carrier film under the adhesive layer;

forming a pressed region of the adhesive layer by partially pressing the adhesive layer; and

mounting a driving circuit at a portion of the non-display region overlapping the pressed region.

2. The method of claim 1, wherein the pressed region has a thickness in a range of about 0.1 μ

m to about 3 μ

m.

3. The method of claim 1, wherein the forming the pressed region comprises pressing the adhesive layer using a pressing tool.

4. The method of claim 3, wherein the pressing the adhesive layer comprises heating the pressing tool before pressing the adhesive layer.

5. The method of claim 1, wherein the pressed region has a rectangular shape.

6. The method of claim 1, wherein the pressed region has a rectangular shape with rounded or chamfering corners.

7. The method of claim 1, wherein the flexible base substrate comprises a polyimide (PI).

8. The method of claim 1, wherein the adhesive layer comprises at least one of a rubber-based resin, an acrylic-based resin, a vinyl ester-based resin, a silicon-based resin, or a urethane-based resin.

9. The method of claim 1, wherein the flexible carrier film comprises a polyethylene terephthalate (PET).

10. The method of claim 1, wherein the mounting the driving circuit comprises using an anisotropic conductive film (ACF).

11. The method of claim 10, wherein the forming the pressed region further comprises pressing the ACF at the non-display region.

12. A flexible display device comprising:

a flexible carrier film;

an adhesive layer on the flexible carrier film, the adhesive layer having a non-pressed region and a pressed region, wherein a height of the pressed region is smaller than a height of the non-pressed region;

a flexible base substrate on the adhesive layer, the flexible base substrate having a display region and a non-display region;

a display unit comprising a plurality of pixels, at the display region; and

a driving circuit at the non-display region overlapping the pressed region, the driving circuit configured to provide a data signal to the display unit.

13. The device of claim 12, wherein the flexible carrier film comprises a polyethylene terephthalate (PET).

14. The device of claim 12, wherein the adhesive layer comprises at least one of a rubber-based resin, an acrylic-based resin, a vinyl ester-based resin, a silicon-based resin, or a urethane-based resin.

15. The device of claim 12, wherein the pressed region has a thickness of about 0.1 μ

m to about 3 μ

m.

16. The device of claim 12, wherein a difference between the height of the pressed region and the height of the non-pressed region is about 20 μ

m to about 50 μ

m.

17. The device of claim 12, wherein the pressed region has a rectangular shape.

18. The device of claim 12, wherein the pressed region has a rectangular shape with rounded or chamfering corners.

19. The device of claim 12, wherein the flexible base substrate comprises a polyimide (PI).

20. The flexible display device of claim 12, wherein the driving circuit is coupled to the non-display region with an anisotropic conductive film (ACF).