Scratch-resistant laminates with retained optical properties
First Claim
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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 at least two layers, wherein a first layer is disposed between the inorganic oxide substrate and a second layer, the first layer comprising a first sub-layer and a second sub-layer wherein the first sub-layer is disposed between the inorganic oxide substrate and the second sub-layer,the first sub-layer having a thickness and comprising a silicon-containing oxy-nitride, with the amount of oxygen in the silicon-containing oxy-nitride decreasing along the thickness in a direction moving away from the inorganic oxide substrate,the first sub-layer being disposed directly on the substrate,the second sub-layer comprising silicon-nitride; and
the second layer comprising SiO2;
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 comprises at least one of the color coordinates (a*=0, b*=0) and the color coordinates of the substrate,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).
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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.
386 Citations
27 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, the optical film structure comprising at least two layers, wherein a first layer is disposed between the inorganic oxide substrate and a second layer, the first layer comprising a first sub-layer and a second sub-layer wherein the first sub-layer is disposed between the inorganic oxide substrate and the second sub-layer, the first sub-layer having a thickness and comprising a silicon-containing oxy-nitride, with the amount of oxygen in the silicon-containing oxy-nitride decreasing along the thickness in a direction moving away from the inorganic oxide substrate, the first sub-layer being disposed directly on the substrate, the second sub-layer comprising silicon-nitride; and the second layer comprising SiO2; 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 comprises at least one of the color coordinates (a*=0, b*=0) and the color coordinates of the substrate, 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, 22, 23)
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14. 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, the optical film structure comprising at least two layers, wherein a first layer is disposed between the inorganic oxide substrate and a second layer, the first layer comprising a first sub-layer and a second sub-layer wherein the first sub-layer is disposed between the inorganic oxide substrate and the second sub-layer, the first sub-layer having a thickness and comprising a silicon-containing oxy-nitride, with the amount of oxygen in the silicon-containing oxy-nitride decreasing along the thickness moving away from the inorganic oxide substrate, the first sub-layer being disposed directly on the substrate and having a refractive index gradient that increases along the thickness of the first sub-layer in a direction moving away from the inorganic oxide substrate and changes with the change in the amount of oxygen in the first sub-layer, the second sub-layer having a second index of refraction, wherein the second index of refraction is greater than a majority of the refractive index gradient of the first sub-layer; wherein the article exhibits 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 comprises at least one of the color coordinates (a*=0, b*=0) and the color coordinates of the substrate, 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, 19, 20, 21, 24, 25, 26, 27)
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Specification
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Current AssigneeCorning Incorporated
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Original AssigneeCorning Incorporated
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InventorsKoch, III, Karl William, Paulson, Charles Andrew, Price, James Joseph
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Primary Examiner(s)Auer, Laura A
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Application NumberUS14/828,114Publication NumberTime in Patent Office2,850 DaysField of SearchUS Class CurrentCPC Class CodesC03C 17/245 by deposition from the vapo...C03C 17/3411 with at least two coatings ...C03C 17/3435 comprising a nitride, oxyni...C03C 21/002 to perform ion-exchange bet...C03C 2217/78 Coatings specially designed...C03C 2217/91 Coatings containing at leas...C03C 3/091 containing aluminiumC23C 14/34 SputteringC23C 14/3442 using an ion beamG02B 1/10 Optical coatings produced b...G02B 1/105 Protective coatingsG02B 1/14 Protective coatings, e.g. h...Y10T 428/2495 Thickness [relative or abso...Y10T 428/31612 As silicone, silane or silo...
