Article comprising puncture resistant laminate with ultra-thin glass layer

Patent metadata

Field	Value
Publication number	US-12005677-B2
Application number	US-201917270916-A
Country	US
Kind code	B2
Filing date	Aug 13, 2019
Priority date	Aug 24, 2018
Publication date	Jun 11, 2024
Grant date	Jun 11, 2024

Abstract

An article including a laminate having a substrate and an ultra-thin cover glass layer bonded to atop surface of the substrate. The ultra-thin cover glass layer has a thickness in the range of 1 micron to 49 microns. The ultra-thin cover glass layer is bonded to the top surface of the substrate with an optically transparent adhesive layer having a thickness in the range of 5 microns to 50 microns.

First claim

What is claimed is:

1. An article comprising:
a laminate comprising:
a substrate;
a cover glass layer bonded to a top surface of the substrate, the cover glass layer comprising a thickness in a range of 1 micron to 30 microns; and
an optically transparent adhesive layer comprising a thickness in a range of 5 microns to 50 microns that bonds a bottom surface of the cover glass layer to the top surface of the substrate,
wherein the cover glass layer comprises an alkali-containing aluminosilicate glass comprising SnO 2 at a mol % of 0.08 mol % or less,
wherein the laminate achieves a bend radius of 3 mm, and
wherein the laminate comprises an impact resistance defined by the capability of the cover glass layer to avoid failure at a puncture load of 2.25 kilograms-force or more in a Puncture Test.

2. The article of claim 1 , wherein the optically transparent adhesive layer comprises a thickness in the range of 25 microns to 50 microns.

3. The article of claim 1 , wherein the cover glass layer is directly bonded to the top surface of the substrate with the optically transparent adhesive layer.

4. The article of claim 1 , wherein the laminate comprises an impact resistance defined by the capability of the cover glass layer to avoid failure at a pen drop height of 8 centimeters or more, wherein the pen drop height is measured according to a Pen Drop Test.

5. The article of claim 1 , wherein the cover glass layer is a redrawn glass layer drawn to the thickness of the cover glass layer.

6. The article of claim 1 , wherein the cover glass layer comprises:
55 mol % to 70 mol % SiO 2 ;
10 mol % to 20 mol % Al 2 O 3 ; and
10 mol % to 20 mol % Na 2 O.

7. The article of claim 1 , wherein the cover glass layer comprises a compressive stress at least at one of a top surface or the bottom surface of the cover glass layer, and a concentration of metal oxide that is different at least at two points through the thickness of the cover glass layer.

8. The article of claim 1 , wherein the substrate comprises an electronic display comprising a display surface defining at least a portion of the top surface of the substrate.

9. The article of claim 1 , comprising a coating layer disposed on a top surface of the cover glass layer.

10. The article of claim 9 , wherein the coating layer comprises a coating layer selected from the group consisting of: an anti-reflection coating layer, an anti-glare coating layer, an anti-fingerprint coating layer, an anti-splinter coating layer, and an anti-microbial coating layer.

11. The article of claim 1 , wherein the laminate is devoid of a polymeric hard-coating layer disposed on a top surface of the cover glass layer.

12. The article of claim 1 , wherein the article is a consumer electronic product and the substrate comprises an electronic display, the consumer electronic product comprising:
a housing comprising a front surface, a back surface and side surfaces; and
electrical components positioned at least partially within the housing, the electrical components comprising a controller, a memory, and the electronic display, the electronic display at or adjacent the front surface of the housing,
wherein the cover glass layer forms at least a portion of the housing.

13. The article of claim 1 , wherein the alkali-containing aluminosilicate glass comprises 0.04 mol % to 0.08 mol % SnO 2 .

14. A method of making a laminate, the method comprising:
bonding a cover glass layer to a top surface of a substrate, the cover glass layer comprising a thickness in the range of 1 microns to 30 microns,
wherein a bottom surface of the cover glass layer is bonded to the top surface of the substrate with an optically transparent adhesive layer comprising a thickness in a range of 5 microns to 50 microns,
wherein the cover glass layer comprises an alkali-containing aluminosilicate glass comprising SnO 2 at a mol % of 0.08 mol % or less,
wherein the laminate achieves a bend radius of 3 mm, and
wherein the laminate comprises an impact resistance defined by the capability of the cover glass layer to avoid failure at a puncture load of 2.25 kilograms-force or more in a Puncture Test.

15. The method of claim 14 , further comprising forming the cover glass layer with a redrawing process, wherein the redrawing process comprises redrawing the cover glass layer to the thickness of the cover glass layer.

16. The method of claim 14 , further comprising coating a top surface of the cover glass layer with a coating layer.

Assignees

• Corning Inc

Inventors

• Baby Shinu
• Kuo Kuan-Ting
• Qaroush Yousef Kayed
• Smith Iii Robert Lee

Classifications

• H10K59/871

  Self-supporting sealing arrangements · CPC title

• B32B17/06 Primary

  comprising glass as the main or only constituent of a layer, next to another layer of a specific {material} · CPC title

• B32B7/12 Primary

  using interposed adhesives or interposed materials with bonding properties · CPC title

• B32B2571/00

  Protective equipment · CPC title

• B32B2457/20

  Displays, e.g. liquid crystal displays, plasma displays · CPC title