Glass article and display device including the same

Patent metadata

Field	Value
Publication number	US-11820702-B2
Application number	US-202217816710-A
Country	US
Kind code	B2
Filing date	Aug 1, 2022
Priority date	Apr 13, 2020
Publication date	Nov 21, 2023
Grant date	Nov 21, 2023

Abstract

A glass article includes a first surface, a second surface opposed to the first surface, a first compressive region extending from the first surface to a first compression depth, a second compressive region extending from the second surface to a second compression depth and a tensile region between the first compression depth and the second compression depth. A stress profile of the first compressive region includes a first segment located between the first surface and a first transition point and a second segment located between the first transition point and the first compression depth. A depth from the first surface to the first transition point ranges from 6.1 μm to 8.1 μm. A compressive stress at the first transition point ranges from 207 MPa to 254 MPa. A stress-depth ratio of the first transition point ranges from 28 MPa/μm to 35 MPa/μm.

First claim

What is claimed is:

1. A glass article having a thickness of 0.45 mm to 0.8 mm, comprising:
a first surface;
a second surface opposed to the first surface;
a first compressive region extending from the first surface to a first compression depth;
a second compressive region extending from the second surface to a second compression depth; and
a tensile region between the first compression depth and the second compression depth,
wherein a compressive stress at the first surface ranges from 700 MPa to 950 MPa,
wherein the first compression depth ranges from 125 μm to 135 μm,
wherein a stress profile of the first compressive region has:
an inflection point at a depth of 6.1 μm to 8.1 μm; and
a compressive stress at the inflection point in a stress range of 207 MPa to 254 MPa, and

wherein a compressive energy of the first compressive region ranges from 12,800 J/mm 2 to 15,645 J/mm 2 .

2. The glass article of claim 1 , wherein a median of a limited drop height is greater than or equal to 80 cm in a ball-on-ring (BOR) test of the glass article utilizing a ball of 60 g for 10 or more samples.

3. The glass article of claim 1 , wherein the glass article contains lithium aluminosilicate.

4. A glass article having a thickness of 0.45 mm to 0.8 mm, comprising:
a first surface;
a second surface opposed to the first surface;
a first compressive region extending from the first surface to a first compression depth;
a second compressive region extending from the second surface to a second compression depth; and
a tensile region between the first compression depth and the second compression depth,
wherein a compressive stress at the first surface ranges from 700 MPa to 950 MPa,
wherein the first compression depth ranges from 125 μm to 135 μm,
wherein a stress profile of the first compressive region has:
an inflection point at a depth of 6.1 μm to 8.1 μm; and
a compressive stress at the inflection point in a stress range of 207 MPa to 254 MPa, and

wherein the glass article is configured such that a median of a limited drop height is greater than or equal to 80 cm in a ball-on-ring (BOR) test of the glass article utilizing a ball of 60 g for 10 or more samples.

Assignees

• Samsung Display Co Ltd

Inventors

• Shim Gyu In
• Kim Seung
• Kang Byung Hoon
• Park Young Ok
• Sung Su Jin

Classifications

• C03C21/002 Primary

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

• C03C3/083 Primary

  containing aluminium oxide or an iron compound · CPC title

• G02F1/1333

  Constructional arrangements; {Manufacturing methods}(G02F1/135, G02F1/136 take precedence) · CPC title

• G02F1/133308

  Support structures for LCD panels, e.g. frames or bezels · CPC title

• G02F1/167

  by electrophoresis · CPC title