Sheet of glass and device including said sheet of glass

Patent metadata

Field	Value
Publication number	US-10071930-B2
Application number	US-201314430056-A
Country	US
Kind code	B2
Filing date	Sep 20, 2013
Priority date	Sep 21, 2012
Publication date	Sep 11, 2018
Grant date	Sep 11, 2018

Abstract

A non-reinforced glass sheet, the chemical composition of which is of lithium aluminosilicate type, has a thickness of at most 2.0 mm. Furthermore, an electronic device, in particular a pocket or portable electronic device, includes, as protective glass, the non-reinforced glass sheet.

First claim

The invention claimed is:

1. An electronic device, comprising a protective glass consisting of at least one non-reinforced glass sheet of lithium aluminosilicate type, the chemical composition of which comprises the following oxides in the ranges of weight contents defined below:

SiO 2
50-80%

Al 2 O 3
12-30%

Li 2 O
  1-10%.

and the thickness of which is at most 2.0 mm.

2. The electronic device as claimed in claim 1 , wherein the thickness of is at most 1.5 mm.

3. The electronic device as claimed in claim 2 , wherein the thickness is at most 1.1 mm.

4. The electronic device as claimed in claim 1 , wherein a total weight content of alkali metal oxides other than lithium oxide is at most 2% by weight.

5. The electronic device as claimed in claim 4 , wherein the total weight content of alkali metal oxides other than lithium oxide is at most 1% by weight.

6. The electronic device as claimed in claim 1 , wherein the chemical composition comprises the following oxides in the ranges of weight contents defined below:

SiO 2
52-75%,

Al 2 O 3
15-27%,

Li 2 O
 2-10%,

Na 2 O
0-1%,

K 2 O
0-5%,

CaO
  0-0.5%,

ZnO
0-5%,

MgO
0-5%,

BaO
0-5%,

SrO
0-3%,

TiO 2
0-6%,

ZrO 2
0-3%,

P 2 O 5
0-8%.

7. The electronic device as claimed in claim 6 , wherein the chemical composition comprises the following oxides in the ranges of weight contents defined below:

SiO 2
65-70%,

Al 2 O 3
  18-19.8%,

Li 2 O
2.5-3.8%,

Na 2 O
  0-0.5%,

K 2 O
0-1%,

CaO
  0-0.1%,

ZnO
1.2-2.8%,

MgO
0.55-1.5%, 

BaO
  0-1.4%,

SrO
  0-1.4%,

TiO 2
0-2%,

ZrO 2
  0-2.5%,

P 2 O 5
0-1%.

8. The electronic device as claimed in claim 1 , wherein the glass sheet is provided on one of its faces with a touch-sensitive detection device, positioned on a lower face of said glass sheet.

9. The electronic device as claimed in claim 8 , wherein the touch-sensitive detection device is a projected capacitive device.

10. The electronic device as claimed in claim 9 , wherein the touch-sensitive detection device comprises at least one network of conductive paths arranged as a plurality of rows and columns.

11. The electronic device as claimed in claim 10 , wherein the conductive paths consist of an electrically conductive transparent oxide.

12. The electronic device as claimed in claim 11 , wherein the electrically conductive transparent oxide is indium tin oxide.

13. The electronic device as claimed in claim 1 , wherein the electronic device is a pocket or portable electronic device, a smartphone, a personal digital assistant, a digital camera, a multimedia player, a computer, a tablet, a television, an automated ticket machine, an automated teller machine, an automated checkout machine, a screen integrated into a furniture, an electrical good or a vehicle instrument panel.

14. The electronic device as claimed in claim 1 , wherein the protective glass consists of a single non-reinforced glass sheet.

15. The electronic device as claimed in claim 14 , wherein the single non-reinforced glass sheet includes a first main face and a second main face that is opposite the first main face, and wherein the first main face is in contact with the outside environment and the second main face is provided with a touch-sensitive detection device.

16. An electronic device comprising a protective glass, the protective glass consisting of at least one non-reinforced glass sheet, comprising SiO 2 , Al 2 O 3 and Li 2 O and having a thickness of at most 2.0 mm, wherein surface stresses formed on the glass sheet are lower than 50 MPa, wherein the chemical composition of the at least one non-reinforced glass sheet comprises the following oxides in the ranges of weight contents defined below:

SiO 2

Assignees

• Saint Gobain

Inventors

• Lestrigant Claire
• Gy René
• Sellier Julien

Classifications

• G06F1/1643

  the display being associated to a digitizer, e.g. laptops that can be used as penpads (details related to the relative motion of the display enclosure with respect to the body enclosure, e.g. to move between laptop and tablet PC configuration G06F1/1615) · CPC title

• C03C2217/948

  Layers comprising indium tin oxide [ITO] · CPC title

• G06F3/044

  by capacitive means · CPC title

• Y10T29/49826

  Assembling or joining · CPC title

• G06F2203/04103

  Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices · CPC title