Scratch-Resistant Articles with Retained Optical Properties
First Claim
1. An article comprising:
- an inorganic oxide substrate having opposing major surfaces; and
an optical film structure disposed on a first major surface of the inorganic oxide substrate,wherein the optical film structure exhibits a scratch resistance, and wherein the article exhibits an average transmittance of 85% or more, over the visible spectrum,wherein optical film structure comprises a layer having a hardness of about 12 GPa or greater as measured by a diamond Berkovitch indenter test,wherein the glass film article exhibits one or more of;
a color transmittance in the (L, a*, b*) colorimetry system having transmittance color coordinates, such that the distance between the transmittance color coordinates and a reference point is less than about 2, anda color reflectance in the (L, a*, b*) colorimetry system having reflectance color coordinates, such that the distance between the reflectance color coordinates and a reference point is less than about 2, andwherein the reference point comprising at least one of the color coordinates (a*=0, b*=0) and the color coordinates of the substrate.
2 Assignments
0 Petitions
Accused Products
Abstract
One or more aspects of the disclosure pertain to an article including an optical film structure disposed on an inorganic oxide substrate, which may include a strengthened or non-strengthened substrate that may be amorphous or crystalline, such that the article exhibits scratch resistance and retains the same or improved optical properties as the inorganic oxide substrate, without the optical film structure disposed thereon. In one or more embodiments, the article exhibits an average transmittance of 85% or more, over the visible spectrum (e.g., 380 nm-780 nm). Embodiments of the optical film structure include aluminum-containing oxides, aluminum-containing oxy-nitrides, aluminum-containing nitrides (e.g., AlN) and combinations thereof. The optical film structures disclosed herein also include a transparent dielectric including oxides such as silicon oxide, germanium oxide, aluminum oxide and a combination thereof. Methods of forming such articles are also provided.
23 Citations
25 Claims
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1. An article comprising:
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an inorganic oxide substrate having opposing major surfaces; and an optical film structure disposed on a first major surface of the inorganic oxide substrate, wherein the optical film structure exhibits a scratch resistance, and wherein the article exhibits an average transmittance of 85% or more, over the visible spectrum, wherein optical film structure comprises a layer having a hardness of about 12 GPa or greater as measured by a diamond Berkovitch indenter test, wherein the glass film article exhibits one or more of; a color transmittance in the (L, a*, b*) colorimetry system having transmittance color coordinates, such that the distance between the transmittance color coordinates and a reference point is less than about 2, and a color reflectance in the (L, a*, b*) colorimetry system having reflectance color coordinates, such that the distance between the reflectance color coordinates and a reference point is less than about 2, and wherein the reference point comprising at least one of the color coordinates (a*=0, b*=0) and the color coordinates of the substrate. - View Dependent Claims (2, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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3. (canceled)
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4. (canceled)
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5. (canceled)
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18. An article comprising:
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an inorganic oxide substrate having opposing major surfaces; an optical film structure disposed on a first major surface of the inorganic oxide substrate, the optical film structure comprising a first layer comprising an aluminum-containing nitride, an aluminum-containing oxy-nitride, an aluminum-containing oxide or a combination thereof, and a second layer disposed on the first layer, wherein the optical film structure exhibits a hardness of 16 GPa or greater, as measured by a diamond Berkovitch indenter test, and wherein the article exhibits an average transmittance of 85% or more over the visible spectrum. - View Dependent Claims (19, 20, 21, 22, 23)
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24. A method of forming a substrate comprising:
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providing a inorganic oxide substrate having opposing major surfaces and comprising an amorphous substrate or a crystalline substrate; and disposing a low-stress optical film structure on a first major surface of the inorganic oxide substrate at a pressure in the range from about 0.5 mTorr to about 10 mTorr, wherein the optical film structure comprises a first layer having a hardness of 16 GPa or greater and a second layer disposed on the first layer. - View Dependent Claims (25)
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Specification