Chemically strengthened glass
US-2018065886-A1 · Mar 8, 2018 · US
Chemically strengthened glass
US11008249B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11008249-B2 |
| Application number | US-201815954653-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 17, 2018 |
| Priority date | Apr 20, 2017 |
| Publication date | May 18, 2021 |
| Grant date | May 18, 2021 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
A chemically strengthened glass obtained by chemically strengthening a lithium-containing aluminosilicate glass, when representing a sheet thickness of the chemically strengthened glass by t (μm) and an internal stress at a depth x (μm) from a surface of the chemically strengthened glass by σ(x) (MPa), has a value of a ratio C=rE/rElimit being greater than or equal to 0.7 and less than 1.0 where rE (kJ/m2) is calculated from Expression (3) described above and rElimit=16×t/1000+3.
First claim
Opening claim text (preview).
The invention claimed is: 1. A chemically strengthened glass obtained by chemically strengthening a lithium-containing aluminosilicate glass, wherein representing a sheet thickness of the chemically strengthened glass by t (μm) and an internal stress at a depth x (μm) from a surface of the chemically strengthened glass by σ(x) (MPa), the chemically strengthened glass has a value of a ratio C=rE/rE limit being greater than or equal to 0.7 and less than 1.0 where rE (kJ/m 2 ) is calculated from a following Expression (3) and rE limit =16×t/1000+3, wherein rE limit is expressed in kJ/m 2 rE = 2 × ∫ DOL t / 2 | σ ( x ) | dx × ( t - 2 × DOL ) 1000 × t ( 3 ) where DOL represents a depth (μm) of a compressive stress layer of the chemically strengthened glass, wherein DOL representing the depth of the compressive stress layer is greater than or equal to 85 μm, wherein a position at which a half value (HW) of a surface compressive stress CS is less than 8 μm. 2. The chemically strengthened glass as claimed in claim 1 , wherein the surface compressive stress CS is greater than or equal to 600 MPa. 3. The chemically strengthened glass as claimed in claim 1 , wherein DOL representing the depth of the compressive stress layer is greater than or equal to 90 μm. 4. The chemically strengthened glass as claimed in claim 1 , wherein DOL representing the depth of the compressive stress layer is greater than or equal to 95 μm. 5. The chemically strengthened glass as claimed in claim 1 , wherein the sheet thickness t is less than or equal to 1500 μm. 6. The chemically strengthened glass as claimed in claim 2 , wherein the sheet thickness t is less than or equal to 1500 μm. 7. The chemically strengthened glass as claimed in claim 3 , wherein the sheet thickness t is less than or equal to 1500 μm. 8. The chemically strengthened glass as claimed in claim 4 , wherein the sheet thickness t is less than or equal to 1500 μm. 9. The chemically strengthened glass as claimed in claim 1 , wherein DOL representing the depth of the compressive stress layer is greater than or equal to 100 μm. 10. The chemically strengthened glass as claimed in claim 1 , wherein the chemically strengthened glass has a value of a ratio C=rE/rE limit being greater than or equal to 0.84 and less than 1.0. 11. The chemically strengthened glass as claimed in claim 1 , wherein the chemically strengthened glass has a value of a ratio C=rE/rE limit being greater than or equal to 0.87 and less than 1.0. 12. The chemically strengthened glass as claimed in claim 1 , wherein the chemically strengthened glass has a value of a ratio C=rE/rE limit being greater than or equal to 0.90 and less than 1.0. 13. The chemically strengthened glass as claimed in claim 1 , wherein a position at which a half value (HW) of a surface compressive stress CS is less than or equal to 6 μm. 14. The chemically strengthened glass as claimed in claim 1 , wherein a position at which a half value (HW) of a surface compressive stress CS is less than or equal to 5 μm. 15. A chemically strengthened glass obtained by chemically strengthening a lithium-containing aluminosilicate glass, wherein representing a sheet thickness of the chemically strengthened glass by t (μm) and an internal stress at a depth x (μm) from a surface of the chemically strengthened glass by σ(x) (MPa), the chemically strengthened glass has a value of a ratio C=rE/rE limit being greater than or equal to 0.7 and less than 1.0 where rE (kJ/m 2 ) is calculated from a following Expression (3) and rE limit =16×t/1000+3, wherein rE limit is expressed in kJ/m 2 , and a stress value at a half depth of a DOL value of the glass is 10% or less, with respect to a surface stress value, r E = 2 × ∫ DOL t / 2 σ ( x ) dx × ( t - 2 × DOL
Assignees
Inventors
Classifications
- C03C21/002Primary
to perform ion-exchange between alkali ions (C03C21/005 takes precedence) · CPC title
Compositions for glass with special properties · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US11008249B2 cover?
- A chemically strengthened glass obtained by chemically strengthening a lithium-containing aluminosilicate glass, when representing a sheet thickness of the chemically strengthened glass by t (μm) and an internal stress at a depth x (μm) from a surface of the chemically strengthened glass by σ(x) (MPa), has a value of a ratio C=rE/rElimit being greater than or equal to 0.7 and less than 1.0 wher…
- Who is the assignee on this patent?
- Agc Inc
- What technology area does this patent fall under?
- Primary CPC classification C03C21/002. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue May 18 2021 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 6 related publications on this page (citations in our corpus or others sharing the same primary CPC).