Crack and scratch resistant glass and enclosures made therefrom
AssigneeCorning Incorporated
InventorsKristen L Barefoot, Matthew John Dejneka, Sinue Gomez, Timothy Michael Gross, Nagaraja Shashidhar
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Abstract
A glass and an enclosure, including windows, cover plates, and substrates for mobile electronic devices comprising the glass. The glass has a crack initiation threshold that is sufficient to withstand direct impact, has a retained strength following abrasion that is greater than soda lime and alkali aluminosilicate glasses, and is resistant to damage when scratched. The enclosure includes cover plates, windows, screens, and casings for mobile electronic devices and information terminal devices.
Claims38
An aluminoborosilicate glass, the aluminoborosilicate glass comprising at least 50 mol % SiO2, less than 10 mol % B2O3, and at least 8 mol % Na2O, wherein the aluminoborosilicate glass is free of lithium and ion exchangeable, wherein a ratio
- Al
- 2
-
- O
- 3
-
- (
- mol
-
-
- %
- )
- +
- B
- 2
-
- O
- 3
-
- (
- mol
-
-
- %
- )
- ∑
- modifiers
-
- (
- mol
-
-
- %
- )
- >
- 1
- ,
- wherein Al2O3(mol %) >B2O3(mol %) and the modifers are Na2O and, optionally, at least one of one or more alkali metal oxide R2O other than Na2O and Li2O and one or more alkaline earth oxide RO, wherein the aluminoborosilicate glass has a Young's modulus of less than about 69 GPa, and wherein −5.7 mol %<Σmodifiers−Al2O3<2.99 mol %.
An aluminoborosilicate glass, the aluminoborosilicate glass comprising:
- 50-72 mol % SiO2;
- 9-17 mol % Al2O3;
- less than 10 mol % B2O3;
- 8-16 mol % Na2O;
- and 0-4 mol % K2O, wherein the ratio
- Al
- 2
-
- O
- 3
-
- (
- mol
-
-
- %
- )
- +
- B
- 2
-
- O
- 3
-
- (
- mol
-
-
- %
- )
- ∑
- modifiers
-
- (
- mol
-
-
- %
- )
- >
- 1
- ,
- wherein Al2O3(mol %)>B2O3(mol %) and the modifiers are Na2O and, optionally, at least one of one or more alkali metal oxide R2O other than Na2O and Li2O and one or more alkaline earth oxide RO, wherein the aluminoborosilicate glass is free of lithium, is ion exchangeable and has a Young's modulus of less than about 69 GPa, and wherein −5.7 mol %<Σmodifiers−Al2O3<2.99 mol %.
An aluminoborosilicate glass, the aluminoborosilicate glass comprising at least 58 mol % SiO2, less than 10 mol % B2O3, and at least 8 mol % Na2O, wherein the aluminoborosilicate glass is free of lithium and ion exchangeable, wherein a ratio
- Al
- 2
-
- O
- 3
-
- (
- mol
-
-
- %
- )
- +
- B
- 2
-
- O
- 3
-
- (
- mol
-
-
- %
- )
- ∑
- modifiers
-
- (
- mol
-
-
- %
- )
- >
- 1
- ,
- wherein Al2O3(mol %)>B2O3(mol %) and the modifiers are Na2O and, optionally, at least one of one or more alkali metal oxide R2O other than Na2O and Li2O and one or more alkaline earth oxide RO, wherein the aluminoborosilicate glass has a Young's modulus of less than about 69 GPa, and wherein −5.7 mol %<Σmodifiers−Al2O3 <2.99 mol %.
Dependencies are inferred from the claim text.