Anti-reflection and anti-glare glass laminates

Patent metadata

Field	Value
Publication number	US-12252437-B2
Application number	US-202117924142-A
Country	US
Kind code	B2
Filing date	May 5, 2021
Priority date	May 14, 2020
Publication date	Mar 18, 2025
Grant date	Mar 18, 2025

Abstract

A method of forming a glass laminate includes providing a substrate having a core layer and at least one cladding layer; heat treating the substrate at a temperature such that the at least one cladding layer is phase-separated after the heat treating; and etch treating the substrate for at least 10 sec. A phase-separated glass laminate includes a substrate having a core layer and at least one phase-separated cladding layer, such that the glass laminate has a % transmission of at least 96%, and the at least one cladding layer comprises a grain size in a range of 10 nm to 1 μm, or a graded glass index of greater than 5 nm.

First claim

What is claimed is:

1. A glass-based article, comprising:
a core, wherein the core comprises phase-separated glass or glass-ceramic; and
a cladding overlaying the core, wherein the cladding comprises glass or glass-ceramic;
wherein the cladding comprises porous surface structures with channels.

2. The glass-based article of claim 1 , wherein the article has a transmission of at least 96% therethrough.

3. The glass-based article of claim 1 , wherein thickness of the core is in a range of 1 μm to 200 μm.

4. The glass-based article of claim 1 , wherein thickness of the cladding is in a range of 50 μm to 1000 μm.

5. The glass-based article of claim 1 , wherein a composition of the core in terms of oxide constituents comprises silica (SiO 2 ), alumina (Al 2 O 3 ), and boria (B 2 O 3 ).

6. The glass-based article of claim 5 , wherein the composition further comprises alkali metal oxides and alkaline earth metal oxides.

7. The glass-based article of claim 5 , wherein the composition of the core comprises the boria in a range of 5-23 wt %.

8. The glass-based article of claim 5 , wherein the composition of the core comprises the silica in a range of 45-75 wt %.

9. The glass-based article of claim 5 , wherein the composition of the core comprises the alumina in a range of 8-19 wt %.

10. The glass-based article of claim 1 , wherein the phase-separated glass or glass-ceramic has a grain size in a range of 10 nm to 1 μm.

11. The glass-based article of claim 1 , wherein the cladding is a phase-separated cladding overlaying the core, the cladding comprising glass;
wherein the glass-based article has a % transmission of at least 96%, and
wherein the cladding comprises a grain size in a range of 10 nm to 1 μm.

12. The glass-based article of claim 11 , wherein the core comprises phase-separated glass.

13. The glass-based article of claim 12 , wherein a grain size of the phase-separated cladding is less than a grain size of the phase-separated core.

14. The glass-based article of claim 11 , wherein the glass-based article has a % transmission of at least 98% and a distinctness of image of less than 30%.

15. The glass-based article of claim 11 , wherein the cladding has a graded glass index in a range of 1 μm to 5 μm.

16. The glass-based article of claim 11 , wherein the cladding has an average coefficient of thermal expansion different from an average coefficient of thermal expansion of the core.

17. The glass-based article of claim 1 ,
wherein the phase-separated glass or glass-ceramic has a grain size in a range of 10 nm to 1 μm;
wherein a composition of the core in terms of oxide constituents comprises silica (SiO 2 ), alumina (Al 2 O 3 ), and boria (B 2 O 3 ); and
wherein the composition of the core comprises the boria in a range of 5-23 wt %;
wherein the cladding has thickness in a range of 50 μm to 1000 μm.

18. The glass article of claim 17 , wherein thickness of the core is in a range of 1 μm to 200 μm.

19. The glass article of claim 18 , wherein the article has a transmission of at least 96% therethrough.

20. The glass article of claim 17 , wherein article is 3D shaped and comprises a uniform coating.

Assignees

• Corning Inc

Inventors

• Botu Venkatesh
• De Falussy Attila Lang
• Kim Jin Su
• Koch Iii Karl William
• Li Aize
• Trice James Patrick

Classifications

• B32B2307/7376

  Thickness · CPC title

• B32B2307/412

  Transparent · CPC title

• B32B17/06

  comprising glass as the main or only constituent of a layer, next to another layer of a specific {material} · CPC title

• B32B7/027

  Thermal properties · CPC title

• B32B3/30

  characterised by a layer formed with recesses or projections, e.g. {hollows, grooves, protuberances, ribs (apertured layer B32B3/266; layer with cavities or internal voids B32B3/26)} · CPC title