Deep non-frangible stress profiles and methods of making
US-11021393-B2 · Jun 1, 2021 · US
Glass article and method for manufacturing the same
US12459859B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12459859-B2 |
| Application number | US-202418412320-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 12, 2024 |
| Priority date | Dec 17, 2019 |
| Publication date | Nov 4, 2025 |
| Grant date | Nov 4, 2025 |
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Abstract
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A glass article includes lithium aluminosilicate, 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 disposed between the first compression depth and the second compression depth, where a stress profile of the first compressive region has a first local minimum point at which the stress profile is convex downward and a first local maximum point at which the stress profile is convex upward, where a depth of the first local maximum point is greater than a depth of the first local minimum point, and where a stress of the first local maximum point is greater than a compressive stress of the first local minimum point.
First claim
Opening claim text (preview).
What is claimed is: 1 . A glass article including lithium aluminosilicate, 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 disposed between the first compression depth and the second compression depth, wherein a stress profile of the first compressive region includes a crack prevention zone including a peak, the crack prevention zone being disposed in a depth range of 30 micrometers to 70 micrometers, wherein the peak of the crack prevention zone has a maximum value in the depth range, a depth of the peak of the crack prevention zone has a value of 40 micrometers or more, a stress profile of the first compressive region has a first local minimum point at which the stress profile is convex downward, a depth of the first local minimum point is 0.24 times to 0.31 times the first compression depth, and the first compression depth ranges from 105 micrometers to 115 micrometers. 2 . The glass article of claim 1 , wherein a maximum stress in the crack prevention zone ranges from 262.2 Megapascals to 481.2 Megapascals. 3 . The glass article of claim 1 , wherein the crack prevention zone includes a plurality of peaks. 4 . An electronic device comprising a glass article including lithium aluminosilicate, 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 disposed between the first compression depth and the second compression depth, wherein a stress profile of the first compressive region includes a crack prevention zone including a peak, the crack prevention zone being disposed in a depth range of 30 micrometers to 70 micrometers, wherein the peak of the crack prevention zone has a maximum value in the depth range, a depth of the peak of the crack prevention zone has a value of 40 micrometers or more, a stress profile of the first compressive region has a first local minimum point at which the stress profile is convex downward, a depth of the first local minimum point is 0.24 times to 0.31 times the first compression depth, and the first compression depth ranges from 105 micrometers to 115 micrometers.
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- What does patent US12459859B2 cover?
- A glass article includes lithium aluminosilicate, 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 disposed between the first compression depth and the second compressi…
- Who is the assignee on this patent?
- Samsung Display Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification C03C3/085. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Nov 04 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 12 related publications on this page (citations in our corpus or others sharing the same primary CPC).