Cover glass article

Patent metadata

Field	Value
Publication number	US-10051753-B2
Application number	US-201615348095-A
Country	US
Kind code	B2
Filing date	Nov 10, 2016
Priority date	May 31, 2012
Publication date	Aug 14, 2018
Grant date	Aug 14, 2018

Abstract

A cover glass article includes a glass body having a three-dimensional shape, an inside surface, and an outside surface. Each of the inside and outside surfaces has a surface roughness (Ra) less than 1 nm and is free of indentations having diameters larger than 150 μm.

First claim

The invention claimed is:

1. An electronic device comprising:
a display; and
a cover glass article, comprising:
a three-dimensional shape comprising:
an inside surface;
an outside surface; and
at least one bend comprising both the inside and outside surfaces,

the at least one bend having a bend radius from about 1 mm to about 20 mm;
wherein each of the inside and outside surfaces has a surface roughness (R a ) less than 1 nm and is free of indentations having diameters larger than 150 μm; and
a wall thickness in the range from 0.3 mm to 3 mm, wherein the variation in the wall thickness is ±15% or less.

2. The electronic device of claim 1 , wherein the cover glass article covers and protects the display.

3. The electronic device of claim 2 , wherein the display is located on a front side of the electronic device and the cover glass article covers the display and wraps around a peripheral edge of the electronic device.

4. The electronic device of claim 2 , wherein the display is located on a back of the electronic device and the cover glass article covers the display and wraps around a peripheral edge of the electronic device.

5. The electronic device of claim 2 , wherein the electronic device further comprises a backplate and the cover glass article covers the backplate.

6. The electronic device of claim 1 , wherein each of the inside and outside surfaces of the cover glass article has a surface roughness (R a ) less than 0.7 nm.

7. The electronic device of claim 1 , wherein at least one of the inside and outside surfaces of the cover glass article has a surface roughness (R a ) less than 0.3 nm.

8. The electronic device of claim 1 , wherein a variation in the wall thickness of the cover glass article is within ±10% or less.

9. The electronic device of claim 1 , wherein the outer surface of the cover glass article further comprises less than ten non-indentation defects observable by the unaided human eye at 1000 lux in a 25 mm×25 mm area on any of the surface.

10. The electronic device claim 1 , wherein the cover glass article has a flat section.

11. The electronic device of claim 10 , wherein the flatness of the flat section is better than ±150 μm over a 10 mm×10 mm area.

12. The electronic device of claim 10 , wherein the flatness of the flat section is better than ±50 μm over a 25 mm×25 mm area.

13. The electronic device of claim 1 , wherein the at least one bend section is a spline.

14. The electronic device claim 1 , wherein the cover glass article has an optical transmission greater than 85% at 1 mm thickness in a wavelength range of 400 nm to 800 nm.

15. The electronic device of claim 1 , wherein the cover glass article has a compressive stress greater than 300 MPa.

16. The electronic device of claim 1 , wherein the cover glass article is tempered.

17. The electronic device of claim 16 , wherein the cover glass article is chemically tempered.

18. The electronic device of claim 1 , wherein the glass body comprises an ion-exchanged glass.

19. The electronic device of claim 18 , wherein the ion-exchanged glass has a depth of layer of greater than 15 μm.

20. The electronic device of claim 1 , wherein the electronic device is a telephone, monitor, television, handheld device, or tablet.

Assignees

• Corning Inc

Inventors

• Ehemann Karl David
• Gaylo Keith Raymond
• Mattingly Iii William Brashear
• O'Malley Connor Thomas
• Ukrainczyk Ljerka
• Wasson Kevin Lee

Classifications

• C03C3/091

  containing aluminium · CPC title

• H05K5/0017

  with operator interface units · CPC title

• C03C21/002 Primary

  to perform ion-exchange between alkali ions (C03C21/005 takes precedence) · CPC title

• C03B23/023

  by bending · CPC title

• C03C4/18

  for ion-sensitive glass · CPC title