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US 9,751,799 B2Granted
Physical vapor deposited layers for protection of glass surfaces
AssigneeCorning Incorporated
InventorCharles Andrew Paulson
Life of this patent
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Abstract
A scratch-resistant glass substrate is prepared by forming a hard, scratch-resistant layer over a major surface of the substrate. The layer is formed from an inorganic material such as a metal oxide, metal nitride, metal carbide, or metal boride using, for example, physical vapor deposition such as reactive or non-reactive sputtering at a process temperature of less than 500° C. The inorganic layer is resistant to micro-ductile scratching, which can safeguard the visible appearance of the glass substrate in use. The glass substrate can include chemically-strengthened glass.
Claims18
A scratch-resistant glass article, comprising
- a glass substrate having opposing major surfaces;
- and
- an inorganic, optically-transparent layer formed over a majority of a first major surface, wherein the glass substrate comprises chemically-strengthened glass having a compressive stress of about 300 MPa or greater,
- wherein the scratch-resistant glass article exhibits a scratch depth reduction, when scratched using a Berkovich indenter and a load of up to about 160 mN, of at least 20%, when compared to a glass substrate without the inorganic, optically-transparent layer provided over a majority of a first major surface.
1 more element
Dependencies are inferred from the claim text.