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Chemically strengthened glass and foldable device

A glass-strengthening and chemical technology, used in identification devices, glass forming, glass manufacturing equipment, etc., can solve problems such as strength reduction, and achieve the effect of excellent strength and low recovery force

Active Publication Date: 2021-10-29
ASAHI GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The theoretical strength of glass is high, but the strength will be greatly reduced due to damage

Method used

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  • Chemically strengthened glass and foldable device
  • Chemically strengthened glass and foldable device
  • Chemically strengthened glass and foldable device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0153] A plate-shaped alkali-containing glass having a short side of 60 mm x a long side of 120 mm x a thickness of 0.05 mm was chemically strengthened so that the compressive stress value on the surface became 900 MPa and the thickness of the compressive stress layer became 7 μm. The obtained chemically strengthened glass was heated and bent using a mold so that the angle θ formed by the above-mentioned first point, fifth point, and second point was 90° to produce a curved rectangular chemically strengthened glass. When the 10 mm bending recovery force of the obtained chemically strengthened glass was measured, the recovery force at 10 mm bending was 0.41 kgf.

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Abstract

The present invention pertains to chemically strengthened glass, which is characterized in that the glass comprises a first main face and a second main face opposite to the first main face and has a thickness of 0.30 mm or less; the chemically strengthened glass is in a curved shape with the first main face being a convex face and the second main face being a concave face; and when the chemically strengthened glass is placed on a horizontal plane while locating the first main face on the lower side and no external force except the gravity acts thereon, a part of the first main face does not come into contact with the horizontal plane.

Description

technical field [0001] The present invention relates to chemically strengthened glass and foldable devices. Background technique [0002] In protective covers for displays of various electronic devices including smartphones, glass covers (cover glass) are often used from the viewpoint of improving appearance. The theoretical strength of glass is high, but the strength will be greatly reduced by damage. Therefore, chemically strengthened glass in which a compressive stress layer is formed on the glass surface by ion exchange or the like is used for a cover glass that requires strength such as impact resistance. [0003] In addition, in recent years, foldable electronic devices (foldable devices) equipped with bendable displays have been launched on the market. For application as a cover glass for such a display, chemically strengthened glass having flexibility is desired. [0004] For example, Patent Document 1 discloses a flexible ultra-thin sheet chemically strengthened ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C21/00G09F9/00G09F9/30
CPCG09F9/00G09F9/30C03C21/002C03C15/00C03C3/085C03C3/087C03B23/023G06F1/1652G06F1/1641G06F1/1637
Inventor 鹿岛出藤原祐辅
Owner ASAHI GLASS CO LTD
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