Glass substrate, semiconductor device, and display device
US-2019161387-A1 · May 30, 2019 · US
Alkali-free glass plate
US12441653B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12441653-B2 |
| Application number | US-201917284917-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 7, 2019 |
| Priority date | Oct 15, 2018 |
| Publication date | Oct 14, 2025 |
| Grant date | Oct 14, 2025 |
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- Title
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Abstract
Official abstract text for this publication.
The present invention provides an alkali-free glass sheet, which has a content of Li 2 O+Na 2 O+K 2 O of from 0 mol % to 0.5 mol % in a glass composition, and has a Young's modulus of 78 GPa or more, a strain point of 680° C. or more, and a liquidus temperature of 1,450° C. or less.
First claim
Opening claim text (preview).
The invention claimed is: 1. An alkali-free glass sheet, which comprises as the glass composition, in terms of mol %, 58% to 69% of SiO 2 , 12.7% to 14.5% of Al 2 O 3 , 0% to 4.5% of B 2 O 3 , 5.0% to 6.5% of MgO, 0.5% to 4% of BaO, 4.5% to 8% of CaO, 0.5% to 4.8% of SrO+BaO, and 0% to 0.5% of Li 2 O+Na 2 O+K 2 O, and has a Young's modulus of 78 GPa or more, a strain point of 680° C. or more, and a liquidus temperature of 1,450° C. or less. 2. The alkali-free glass sheet according to claim 1 , wherein the alkali-free glass sheet further comprises 0.001 mol % to 1 mol % of SnO 2 . 3. The alkali-free glass sheet according to claim 1 , wherein the alkali-free glass sheet has a strain point of 690° C. or more. 4. The alkali-free glass sheet according to claim 1 , wherein the alkali-free glass sheet has a Young's modulus of more than 80 GPa. 5. The alkali-free glass sheet according to claim 1 , wherein the alkali-free glass sheet has an average thermal expansion coefficient within a temperature range of from 30° C. to 380° C. of from 30×10 −7 /° C. to 50×10 −7 /° C. 6. The alkali-free glass sheet according to claim 1 , wherein the alkali-free glass sheet has a liquidus viscosity of 10 4.5 dPa·s or more. 7. The alkali-free glass sheet according to claim 1 , wherein the alkali-free glass sheet comprises as the glass composition, in terms of mol %, 58% to 67% of SiO 2 , 12.7% to 14.5% of Al 2 O 3 , 1.5% to 4.5% of B 2 O 3 , 5.0% to 6.5% of MgO, 2% to 4.8% of SrO+BaO, 0% to 0.5% of Li 2 O+Na 2 O+K 2 O, and 4.5% to 8% of CaO, and is substantially free of As 2 O 3 and Sb 2 O 3 . 8. The alkali-free glass sheet according to claim 1 , wherein the alkali-free glass sheet comprises as the glass composition, in terms of mol %, 58% to 69% of SiO 2 , 12.7% to 14.5% of Al 2 O 3 , 0% to 4.5% of B 2 O 3 , 5.0% to 6.5% of MgO, 0.5% to 4% of BaO, 5% to 8% of CaO, 0.5% to 4.8% of SrO+BaO, and 0% to 0.5% of Li 2 O+Na 2 O+K 2 O, and has a Young's modulus of 78 GPa or more, a strain point of 680° C. or more, and a liquidus temperature of 1,450° C. or less. 9. The alkali-free glass sheet according to claim 1 , wherein the alkali-free glass sheet comprises as the glass composition, in terms of mol %, 58% to 69% of SiO 2 , 12.7% to 14.5% of Al 2 O 3 , 0% to 4.5% of B 2 O 3 , 5.0% to 6.0% of MgO, 0.5% to 4% of BaO, 4.5% to 8% of CaO, 0.5% to 4.8% of SrO+BaO, and 0% to 0.5% of Li 2 O+Na 2 O+K 2 O, and has a Young's modulus of 78 GPa or more, a strain point of 680° C. or more, and a liquidus temperature of 1,450° C. or less. 10. The alkali-free glass sheet according to claim 1 , wherein the alkali-free glass sheet comprises as the glass composition, in terms of mol %, 58% to 68% of SiO 2 , 12.7% to 14.5% of Al 2 O 3 , 1.5% to 4.5% of B 2 O 3 , 5.0% to 6.5% of MgO, 2% to 4.8% of SrO+BaO, 0% to 0.5% of Li 2 O+Na 2 O+K 2 O, and 4.5% to 8% of CaO. 11. The alkali-free glass sheet according to claim 10 , wherein the alkali-free glass sheet comprises as the glass composition, in terms of mol %, 58% to 68% of SiO 2 , 12.7% to 14.5% of Al 2 O 3 , 1.5% to 4.5% of B 2 O 3 , 5.0% to 6.5% of MgO, 2% to 4.8% of SrO+BaO, 0% to 0.5% of Li 2 O+Na 2 O+K 2 O, and 5% to 8% of CaO. 12. The alkali-free glass sheet according to claim 10 , wherein the alkali-free glass sheet comprises as the glass composition, in terms of mol %, 58% to 68% of SiO 2 , 12.7% to 14.5% of Al 2 O 3 , 1.5% to 4.5% of B 2 O 3 , 5.0% to 6.0% of MgO, 2% to 4.8% of SrO+BaO, 0% to 0.5% of Li 2 O+Na 2 O+K 2 O, and 4.5% to 8% of CaO. 13. The alkali-free glass sheet according to claim 1 , wherein the alkali-free glass sheet is used for an OLED device. 14. An alkali-free glass sheet, which comprises as the glass composition, in terms of mol %, 58% to 69% of SiO 2 , 12.7% to 14.5% of Al 2 O 3 , 1.5% to 4.5% of B 2 O 3 , 5.0% to 6.5% of MgO, 0.5% to 4% of BaO, 4.5% to 8% of CaO, 0.5% to 4.8% of SrO+BaO, and 0% to 0.5% of Li 2 O+Na 2 O+K 2 O, and has a Young's modulus of 78 GPa or more, a strain point of 680° C. or more, and a liquidus temperature of 1,450° C. or less.
Assignees
Inventors
Classifications
Manufacture or treatment specially adapted for the organic devices covered by this subclass · CPC title
- C03C3/087Primary
containing calcium oxide, e.g. common sheet or container glass · CPC title
- C03C3/091Primary
containing aluminium · CPC title
Organic light-emitting devices (integrated devices or assemblies of multiple devices H10K59/00, H10K65/00; organic semiconductor lasers H01S5/36) · CPC title
OLED displays · CPC title
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US12441653B2 cover?
- The present invention provides an alkali-free glass sheet, which has a content of Li 2 O+Na 2 O+K 2 O of from 0 mol % to 0.5 mol % in a glass composition, and has a Young's modulus of 78 GPa or more, a strain point of 680° C. or more, and a liquidus temperature of 1,450° C. or less.
- Who is the assignee on this patent?
- Nippon Electric Glass Co
- What technology area does this patent fall under?
- Primary CPC classification C03C3/087. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Oct 14 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 6 related publications on this page (citations in our corpus or others sharing the same primary CPC).