DAMAGE RESISTANT GLASS ARTICLE FOR USE AS A COVER PLATE IN ELECTRONIC DEVICES
First Claim
1. An alkali aluminosilicate glass article comprising a base alkali aluminosilicate glass having a length, a width and a thickness, a surface compressive stress of at least about 200 MPa, a surface compressive layer depth in the range of 20-80 μ
- m, and having an amphiphobic fluorine-based surface layer chemically bonded to the surface of the glass article to form a coated glass article,
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Accused Products
Abstract
An alkali aluminosilicate glass article, said alkali aluminosilicate glass having a surface compressive stress of at least about 200 MPa, a surface compressive layer having a depth of at least about 30 μm, a thickness of at least about 0.3 mm and an amphiphobic fluorine-based surface layer chemically bonded to the surface of the glass. In one embodiment the glass has an anti-reflective coating applied to one surface of the glass between the chemically strengthened surface of the glass and the amphiphobic coating. In another embodiment the surface of the chemically strengthened glass is acid treated using a selected acid (e.g., HCL, H2SO4, HClO4, acetic acid and other acids as described) prior to placement of the amphiphobic coating or the anti-reflective coating.
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Citations
22 Claims
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1. An alkali aluminosilicate glass article comprising a base alkali aluminosilicate glass having a length, a width and a thickness, a surface compressive stress of at least about 200 MPa, a surface compressive layer depth in the range of 20-80 μ
- m, and having an amphiphobic fluorine-based surface layer chemically bonded to the surface of the glass article to form a coated glass article,
- View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An alkali aluminosilicate glass article comprising an alkali aluminosilicate glass having a length, a width and a thickness of at least 0.3 mm, a surface compressive stress of at least about 200 MPa, a surface compressive layer depth in the range of 20-70 μ
- m in which K ions have replaced Na and/or Li ions in the glass, and having an amphiphobic fluorine-based surface layer chemically bonded to a surface of the glass article;
wherein the outer surface of said glass to a depth of <
50 nm is an acid etched surface depleted of the exchanged K ions prior to application of fluorine-based surface layer to the surface of the glass. - View Dependent Claims (9, 10, 11, 12)
- m in which K ions have replaced Na and/or Li ions in the glass, and having an amphiphobic fluorine-based surface layer chemically bonded to a surface of the glass article;
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13. An alkali aluminosilicate glass article, said article comprising
a glass substrate having a length, a width and a thickness of at least 0.3 mm, a surface compressive stress of at least about 200 MPa, a surface compressive layer having a depth of at least between about 20-70 μ - m;
an anti-reflective coating on one surface of said glass; and an amphiphobic fluorine-based surface layer chemically bonded to the surface of the anti-reflective coating wherein the glass comprises; 64 mol %≦
SiO2≦
68 mol %;12 mol %≦
Na2O≦
16 mol %;8 mol %≦
Al2O3≦
12 mol %;0 mol %≦
B2O3≦
3 mol %;2 mol %≦
K2O≦
5 mol %;4 mol %≦
MgO≦
6 mol %; and0 mol %≦
CaO≦
5 mol %,wherein; 66 mol %≦
SiO2+B2O3+CaO≦
69 mol %;Na2O+K2O+B2O3+MgO+CaO+SrO>
10 mol %;5 mol %≦
MgO+CaO+SrO≦
8 mol %;(Na2O+B2O3)—
Al2O3≦
2 mol %;2 mol %≦
Na2O—
Al2O3≦
6 mol %; and4 mol %≦
(Na2O+K2O)—
Al2O3≦
10 mol %, andwherein the glass has a liquidus viscosity of at least 130 kpoise. - View Dependent Claims (14, 15, 16, 17, 18)
- m;
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19. A method of making coated alkali aluminosilicate glass article anti-fingerprint and anti-smudge characteristics, said method comprising the steps of:
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providing an alkali aluminosilicate glass substrate having a length, width and thickness; chemically strengthening the surface of the glass substrate to a depth in the range of 20-80 μ
m;machining or otherwise finishing the glass surfaces; ultrasonically cleaning the glass surfaces; optionally, acid washing at least one surface of the glass using a solution of a strong acid, plasma cleaning the at least one surface of the glass using O2; optionally, coating the class with an anti-reflective coating; coating cleaned glass surface or the anti-reflecting coating surface with an amphiphobic coating, curing the amphiphobic coating for a selected time at a selected temperature and a selected humidity; and inspecting the coated alkali aluminosilicate glass article. - View Dependent Claims (20, 21, 22)
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Specification