Method for manufacturing flexible display device having an insulative overcoat and flexible display device having the same

• US 8,258,694 B2
• Filed: 06/12/2007
• Issued: 09/04/2012
• Est. Priority Date: 11/27/2006
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Oh, Eui Yeol
• Primary Examiner(s): Green, Tracie Y
• Application Number:
  US11/808,717
• Publication Number:
  US 20080121415A1
• Time in Patent Office: 1,911 Days
• Field of Search: 257/40, 257/296, 313498-313
• US Class Current: 313/511
• CPC Class Codes: B29D 11/0073 Optical laminates
• CPC Class Codes: G02F 1/133305 Flexible substrates, e.g. plastics, organic film
• CPC Class Codes: H01L 27/1214 comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
• CPC Class Codes: H01L 27/1218 with a particular composition or structure of the substrate
• CPC Class Codes: H01L 27/1266 the substrate on which the devices are formed not being the final device substrate, e.g. using a temporary substrate
• 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

Abstract

A flexible display device and a method for manufacturing a flexible display are provided. The flexible display device includes a flexible substrate, a display element layer formed on the flexible substrate; an insulating protective layer covering the display element layer; and a rigid substrate. The rigid substrate has an etching selectivity at least 20 times greater than that of the insulating protective layer.

Claims

1. A flexible display device, comprising:

a flexible substrate;

a display element layer formed on the flexible substrate;

an overcoat layer completely covering the display element layer and disposed between the display element layer and the flexible substrate; and

an insulating protective layer disposed on and covering the display element layer.

2. The flexible display device according to the claim 1, wherein a thickness of the insulating protection layer is substantially 1 μ

m or less.

3. The flexible display device according to the claim 1, wherein the insulating protection layer includes at least one of silicon, silicon nitride (SiNx), silicon oxide (SiOx), metal oxide, and organic material.

4. The flexible display device according to the claim 3, wherein the insulating protection layer includes a metal oxide having at least one of chrome oxide (CrxOy), tantalum oxide (TaxOy) and aluminum oxide (AlxOy).

5. The flexible display device according to the claim 3, wherein the insulating protection layer includes an organic material having at least one of acrylic organic material, BCB (benzo cyclobutene), PFBC (Perfluorocyclobutane), Teflon, Cytop and Polyimide.

6. The flexible display device according to the claim 1, wherein the insulating protection layer includes at least two layers.

7. A flexible display device, comprising:

a flexible substrate;

a display element layer formed on the flexible substrate;

an overcoat layer completely covering the display element layer and disposed between the display element layer and the flexible substrate; and

an insulating protective layer covering the display element layer,

wherein the insulating protection layer comprises a material having an etching selectivity at most 1/20 times that of a glass substrate.

8. A flexible display device, comprising:

a flexible substrate;

a display element layer formed on the flexible substrate;

an overcoat layer completely covering the display element layer and disposed between the display element layer and the flexible substrate; and

an insulating protective layer covering the display element layer,

wherein the insulating protection layer comprises a material having an etching selectivity at most 1/20 times that of a steel substrate.