GLASS SUBSTRATE FOR DISPLAY DEVICE AND METHOD OF MANUFACTURING THE SAME

• US 20130260105A1
• Filed: 08/28/2012
• Published: 10/03/2013
• Est. Priority Date: 03/30/2012
• Status: Abandoned Application

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: LEE, Yong-Su, KONG, Hyang-Shik, KHANG, Yoon-Ho, YU, Se-Hwan
• Application Number:
  US13/596,421
• Publication Number:
  US 20130260105A1
• Time in Patent Office: Days
• US Class Current: 428/192
• CPC Class Codes: B32B 17/10036 comprising two outer glass sheets
• CPC Class Codes: B32B 17/10137 Chemical strengthening
• CPC Class Codes: C03B 33/074 Glass products comprising an outer layer or surface coating of non-glass material
• CPC Class Codes: C03C 17/06 with metals C03C17/34, C03C17/44 take precedence
• CPC Class Codes: C03C 17/225 Nitrides
• CPC Class Codes: C03C 17/23 Oxides C03C17/02 takes precedence
• CPC Class Codes: C03C 21/002 to perform ion-exchange between alkali ions C03C21/005 takes precedence
• CPC Class Codes: C03C 2217/213 SiO2
• CPC Class Codes: C03C 2217/214 Al2O3
• CPC Class Codes: C03C 2217/26 Cr, Mo, W
• CPC Class Codes: C03C 2217/281 Nitrides
• CPC Class Codes: C03C 2218/33 by etching
• CPC Class Codes: Y02P 40/57 Improving the yield, e-g- reduction of reject rates
• CPC Class Codes: Y10T 428/24777 Edge feature

Abstract

In a method of manufacturing a glass plate for a display device, a protection film is formed on a mother glass plate. The protection film is patterned to form a protection film pattern which prevents ion exchange. Chemically strengthening the mother glass plate includes exchanging alkaline ions of the mother glass plate including the protection film pattern are exchanged with metal ions of a molten salt to form a first chemically strengthened portion, a non-strengthened portion and a second chemically strengthened portion. The upper surface of the protection film pattern is cut in the scribe line area to separate the glass plate at the non-strengthened portion of the mother glass plate, from the mother glass plate.

Claims

1. A glass substrate for a display device, comprising:

a glass plate comprising;

a first chemically strengthened portion on an upper surface of the glass plate;

a non-strengthened portion on a periphery of the upper surface of the glass plate;

a second chemically strengthened portion on a lower surface of the glass plate; and

a protection film pattern on the non-strengthened portion of the glass plate.

2. The glass substrate of claim 1, wherein the protection film pattern comprises at least one selected from silicon nitride, silicon oxide, aluminum oxide, molybdenum and an alloy of molybdenum-tungsten.

3. The glass substrate of claim 1, wherein the protection film pattern has a thickness of about 1,000 angstroms to about 10,000 angstroms.

4. A method of manufacturing a glass plate for a display device, the method comprising:

forming a protection film on a mother glass plate;

patterning the protection film to form a protection film pattern, wherein the protection film pattern prevents ion exchange;

chemically strengthening the mother glass plate by exchanging alkaline ions of the mother glass plate including the protection film pattern with metal ions of a molten salt, to form a first chemically strengthened portion on an upper surface of the mother glass plate, a non-strengthened portion on a portion of the mother glass plate under the protection film pattern and a second chemically strengthened portion on a lower surface of the mother glass plate; and

cutting an upper surface of the protection film pattern to separate the glass plate at the non-strengthened portion of the mother glass plate, from the mother glass plate.

5. The method of claim 4, wherein the protection film pattern comprises at least one selected from silicon nitride, silicon oxide, aluminum oxide, molybdenum and an alloy of molybdenum-tungsten.

6. The method of claim 5, wherein

the protection film comprises at least one selected from silicon nitride, silicon oxide and aluminum oxide;

and

the forming the protection film pattern comprises dry etching the protection film to form the protection film pattern.

7. The method of claim 5, wherein

the protection film comprises at least one selected from molybdenum and an alloy of molybdenum-tungsten;

and

the forming the protection film pattern comprises wet etching the protection film to form the protection film pattern.

8. The method of claim 4, wherein the protection film pattern is formed to have a thickness of about 1,000 angstroms to about 10,000 angstroms.

9. The method of claim 4, wherein

the cutting an upper surface of the protection film pattern is performed in a cutting margin, and

a width of the protection film pattern is greater than the cutting margin.

10. The method of claim 4, wherein

the molten salt comprises a salt of potassium nitrate;

and

the chemical strengthening the mother glass plate further comprises;

soaking the mother glass plate including the protection film pattern in the molten salt at a temperature of about 400 degrees Celsius to about 450 degrees Celsius for about 30 minutes to about 2 hours, to form a compressive stress layer on the upper and lower surfaces of the mother glass plate, wherein the compressive stress layer is formed by exchanging alkaline ions of the mother glass plate with potassium ions of the molten salt.

11. The method of claim 10, wherein a potassium ion concentration of the first and second chemically strengthened portions of the mother glass plate is higher than a potassium ion concentration of the non-strengthened portion of the mother glass plate.

12. The method of claim 4, further comprising:

forming a circuit pattern including a sensing pattern, on the upper surface of the chemically strengthened mother glass plate.

13. The method of claim 4, wherein the cutting an upper surface of protection film pattern is performed through a wheel cutting process.

14. The method of claim 13, wherein the wheel cutting process comprises:

moving a scroll wheel onto the protection film pattern to generate a crack on the mother glass plate; and

applying a force to the cracked mother glass plate to separate the glass plate from the mother glass plate.

15. The method of claim 4, further comprising polishing an edge of the separated glass plate to remove a residual crack at the edge of the separated glass plate, after the cutting an upper surface of the protection film pattern.

16. The method of claim 15, wherein the polishing an edge of the separated glass removes an entire of the protection film pattern.

17. A method of manufacturing a glass plate for a display device, the method comprising:

forming a first mother glass plate comprising a circuit pattern;

forming a protection film on a second mother glass plate;

patterning the protection film to form a protection film pattern, wherein the protection film pattern prevents ion exchange;

chemically strengthening the second mother glass plate by exchanging alkaline ions of the second mother glass plate including the protection film pattern with metal ions of a molten salt to form a first chemically strengthened portion on an upper surface of the mother glass plate, a non-strengthened portion on a lower surface of the protection film pattern and a second chemically strengthened portion on a lower surface of the mother glass plate;

combining the second chemically strengthened portion of the second mother glass plate and an upper surface of the first mother glass plate, to form a laminated glass plate; and

cutting an upper surface of protection film pattern of the second mother glass plate to separate the first and second mother glass plates at the non-strengthened portion of the second mother glass plate, from the laminated glass plate.

18. The method of claim 17, wherein the protection film comprises at least one selected from silicon nitride, silicon oxide, aluminum oxide, molybdenum and an alloy of molybdenum-tungsten.

19. The method of claim 17, wherein the protection film is formed to have a thickness of about 1,000 angstroms to about 10,000 angstroms.

20. The method of claim 17, wherein the cutting an upper surface of protection film pattern is performed through a wheel cutting process.