SCRATCH-RESISTANT LAMINATES 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, the optical film structure comprising a thickness in the range from about 1 μ
m to about 20 μ
m and comprising any one or more of a silicon-containing oxide, a silicon-containing oxy-nitride, silicon nitride, aluminum nitride, an aluminum-containing oxy-nitride, an aluminum-containing oxide, and silicon aluminum oxy-nitride,wherein the article exhibits an average transmittance of 85% or more, over the visible spectrum, and one or more ofa color transmittance in the (L, a*, b*) colorimetry system having transmittance color coordinates when viewed at normal incidence, 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 when viewed at normal incidence, such that the distance between the reflectance color coordinates and a reference point is less than about 2,wherein the reference point comprising at least one of the color coordinates (a*=0, b*=0) and the color coordinates of the substrate, andwherein, when the reference point is the color coordinates of the substrate, the distance equals √
(a*article−
a*substrate)2+(b*article−
b*substrate)2), andwherein, when the reference point is the color coordinates (a*=0, b*=0), the distance equals √
((a*article)2+(b*article)2).
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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.
33 Citations
20 Claims
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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, the optical film structure comprising a thickness in the range from about 1 μ
m to about 20 μ
m and comprising any one or more of a silicon-containing oxide, a silicon-containing oxy-nitride, silicon nitride, aluminum nitride, an aluminum-containing oxy-nitride, an aluminum-containing oxide, and silicon aluminum oxy-nitride,wherein the article exhibits an average transmittance of 85% or more, over the visible spectrum, and one or more of a color transmittance in the (L, a*, b*) colorimetry system having transmittance color coordinates when viewed at normal incidence, 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 when viewed at normal incidence, such that the distance between the reflectance color coordinates and a reference point is less than about 2, wherein the reference point comprising at least one of the color coordinates (a*=0, b*=0) and the color coordinates of the substrate, and wherein, when the reference point is the color coordinates of the substrate, the distance equals √
(a*article−
a*substrate)2+(b*article−
b*substrate)2), andwherein, when the reference point is the color coordinates (a*=0, b*=0), the distance equals √
((a*article)2+(b*article)2). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An article comprising:
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an inorganic oxide substrate having opposing major surfaces and a substrate hardness; 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 comprises a hardness that is greater than the substrate hardness, and wherein the article exhibits an average transmittance of 85% or more over the visible spectrum, and one or more of a color transmittance in the (L, a*, b*) colorimetry system having transmittance color coordinates when viewed at normal incidence, 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 when viewed at normal incidence, such that the distance between the reflectance color coordinates and a reference point is less than about 2, wherein the reference point comprising at least one of the color coordinates (a*=0, b*=0) and the color coordinates of the substrate, and wherein, when the reference point is the color coordinates of the substrate, the distance equals √
(a*article−
a*substrate)2−
(b*article−
b*substrate)2), andwherein, when the reference point is the color coordinates (a*=0, b*=0), the distance equals √
((a*article)2+(b*article)2). - View Dependent Claims (15, 16, 17, 18)
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19. 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 (20)
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Specification