METHOD FOR FIXING GLASS SUBSTRATES AND METHOD FOR PREPARING FLEXIBLE DISPLAY DEVICE

• US 20120234480A1
• Filed: 02/29/2012
• Published: 09/20/2012
• Est. Priority Date: 03/16/2011
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd.
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: ZHOU, Weifeng, XUE, Jianshe
• Granted Patent: US 8,613,825 B2
• Time in Patent Office: Days
• US Class Current: 156/247
• CPC Class Codes: C03B 25/08 of glass sheets
• CPC Class Codes: C03C 27/06 Joining glass to glass by processes other than fusing fusing C03B23/20; units for use as elements for closing wall or like openings and comprising two or more parallel glass panes in spaced relationship, the panes being permanently secured together E06B3/66
• CPC Class Codes: Y02P 40/57 Improving the yield, e-g- reduction of reject rates
• CPC Class Codes: Y10T 156/1116 Using specified organic delamination solvent

Abstract

Embodiments of the disclosed technology disclose a method for fixing glass substrates and a method for preparing a flexible display device. The method for fixing glass substrates comprises coating an edge portion of a first glass substrate corresponding to a second glass substrate with epoxy resin and screeding the coated epoxy resin layer, adhering the second glass substrate to the first glass substrate, and annealing the two glass substrates. With the technical solution of this disclosed technology, the time period for fixing the adhered glass substrates can be reduced with an improved productivity.

Claims

1. A method for fixing glass substrates, comprising:

coating an edge portion of a first glass substrate corresponding to a second glass substrate with epoxy resin and screeding the coated epoxy resin layer, wherein a thickness of the first glass substrate is bigger than that of the second glass substrate;

adhering the second glass substrate to the first glass substrate with the coated epoxy resin layer; and

annealing the two glass substrates after adherence.

2. The method according to claim 1, wherein coating the edge portion of the first glass substrate corresponding to the second glass substrate with epoxy resin comprises:

coating the edge portion of the first glass substrate corresponding to the second glass substrate with epoxy resin in a strip in a width of about 5-20 mm.

3. The method according to claim 1, wherein the thickness of the first glass substrate is not less than 0.4 mm, and the thickness of the second glass substrate is not more than 0.1 mm.

4. The method according to claim 2, wherein the thickness of the first glass substrate is not less than 0.4 mm, and the thickness of the second glass substrate is not more than 0.1 mm.

5. The method according to claim 1, wherein the epoxy resin is a non-photosensitive epoxy resin or a photosensitive epoxy resin.

6. The method according to claim 5, when the epoxy resin is a photosensitive epoxy resin, further comprising performing exposing process on the two glass substrates before annealing said two glass substrates after adherence.

7. The method according to claim 6, wherein performing exposing process on the two glass substrates comprising:

irradiating the two glass substrates with ultraviolet ray, and the wavelength of the ultraviolet ray is one of 365 nm, 405 nm, and 436 nm, or any combination thereof.

8. The method according to claim 2, wherein the epoxy resin is a non-photosensitive epoxy resin or a photosensitive epoxy resin.

9. The method according to claim 1, wherein annealing the two glass substrates comprises:

placing the first glass substrate and the second glass substrate into an oven for annealing, wherein an annealing temperature is set in the range of about 40°

C. to about 60°

C., and

when the epoxy resin is a photosensitive epoxy resin, a time period for annealing is set in the range of about 5 min to about 15 min, and when the epoxy resin is a non-photosensitive epoxy resin, a time period for annealing is set in the range of about 15 min to about 30 min.

10. The method according to claim 2, wherein annealing the two glass substrates comprises:

placing the first glass substrate and the second glass substrate into an oven for annealing, wherein an annealing temperature is set in the range of about 40°

C. to about 60°

C., and when the epoxy resin is a photosensitive epoxy resin, a time period for annealing is set in the range of about 5 min to about 15 min, and when the epoxy resin is a non-photosensitive epoxy resin, a time period for annealing is set in the range of about 15 min to about 30 min.

11. The method according to claim 1, further comprising:

cooling the two annealed glass substrates to ambient temperature for preparing a flexible display device on the second glass substrate; and

softening the coated epoxy resin and separating the first glass substrate from the second glass substrate.

12. The method according to claim 11, wherein softening the coated epoxy resin and separating the first glass substrate from the second glass substrate comprises:

contacting the two glass substrates coated with epoxy resin with acetone or 3M adhesive remover, and

after the coated epoxy resin is softened by the acetone or 3M adhesive remover, separating the first glass substrate from the second glass substrate.

13. A method for preparing a flexible display device, comprising:

providing a base substrate, comprising;

coating an edge portion of a first glass substrate corresponding to a second glass substrate with epoxy resin and screeding the coated epoxy resin layer, wherein a thickness of the first glass substrate is bigger than that of the second glass substrate,

adhering the second glass substrate to the first glass substrate with the coated epoxy resin layer,

annealing the two glass substrates after adherence, and

cooling the two annealed glass substrates to ambient temperature, wherein the second glass substrate is used as the base substrate; and

preparing the flexible display device on the second glass substrate as the base substrate, which is bonded to the first glass substrate.

14. The method according claim 13, further comprising:

softening the coated epoxy resin and separating the first glass substrate from the second glass substrate with the flexible display device formed thereon.