Anti-reflective composite
First Claim
1. An anti-reflective composite comprising:
- (a) a light transmissive substrate;
(b) a hard coat deposited onto the substrate;
(c) a thin carbon layer having an average thickness between about 2 angstroms and about 100 angstroms;
(d) a first transparent oxide layer deposited onto the thin carbon layer;
(e) a second transparent oxide layer deposited onto the first transparent oxide layer;
(f) a second thin carbon layer having an average thickness between about 2 angstroms and about 100 angstroms and deposited on the outermost transparent oxide layer; and
(g) an outermost transparent low surface energy layer having a surface energy of less than about 40 dynes/cm deposited on said second thin carbon layer.
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Accused Products
Abstract
An anti-reflective composite is provided having very high visible light transmission and negligible visible reflectance over 400 nm-800 nm wavelengths. The composite of the invention includes (a) a light transmissive substrate; (b) a hard coat deposited onto the substrate; (c) a thin carbon layer having an average thickness between about 2 Å and about 100 Å; and (d) a plurality of transparent oxide layer pairs deposited onto the thin carbon layer, each transparent oxide layer pair comprising (i) a first transparent oxide having a refractive index between about 1.65 and about 2.65 and an average thickness between about 100 Å and about 3200 Å and (ii) a second transparent oxide layer having a refractive index between about 1.2 and about 1.85, and an average thickness between about 100 Å and about 3200 Å. The composite can also include an intermediate oxide layer disposed between the thin carbon layer and the first transparent oxide layer. Such intermediate oxide layer has a refractive index between about 1.5 and about 2.2 and is between 400 Å and about 1000 Å in thickness. In another preferred embodiment, the composite further comprises an outermost transparent low surface energy layer having a surface energy of less than about 40 dynes/cm. In another preferred embodiment, the transparent layers are deposited by vacuum or non-vacuum processes or by a combination of both processes.
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Citations
13 Claims
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1. An anti-reflective composite comprising:
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(a) a light transmissive substrate;
(b) a hard coat deposited onto the substrate;
(c) a thin carbon layer having an average thickness between about 2 angstroms and about 100 angstroms;
(d) a first transparent oxide layer deposited onto the thin carbon layer;
(e) a second transparent oxide layer deposited onto the first transparent oxide layer;
(f) a second thin carbon layer having an average thickness between about 2 angstroms and about 100 angstroms and deposited on the outermost transparent oxide layer; and
(g) an outermost transparent low surface energy layer having a surface energy of less than about 40 dynes/cm deposited on said second thin carbon layer. - View Dependent Claims (2)
(i) said first transparent oxide layers have a refractive index between about 1.65 and about 2.65 and an average thickness between about 100 angstroms and about 3200 angstroms and (ii) said second transparent oxide layers have a refractive index between about 1.2 and about 1.85, and an average thickness between about 100 angstroms and about 3200 angstroms.
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3. An anti-reflective composite comprising
(a) a light transmissive substrate; -
(b) a hard coat deposited onto the substrate;
(c) a thin carbon layer having an average thickness between about 2 angstroms and about 100 angstroms;
(d) a first transparent oxide layer deposited onto the thin carbon layer; and
(e) a second transparent oxide layer deposited onto the first transparent oxide layer;
wherein one of the transparent oxide layers is a tertiary alloy oxide layer. - View Dependent Claims (4, 5)
(i) said first transparent oxide layers have a refractive index between about 1.65 and about 2.65 and an average thickness between about 100 angstroms and about 3200 angstroms and (ii) said second transparent oxide layers have a refractive index between about 1.2 and about 1.85, and an average thickness between about 100 angstroms and about 3200 angstroms.
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6. An anti-reflective composite comprising:
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(a) a light transmissive substrate;
(b) a hard coat deposited onto the substrate;
(c) a thin carbon layer having an average thickness between about 2 angstroms and about 100 angstroms;
(d) an intermediate oxide layer;
(e) a first transparent oxide layer deposited onto the intermediate oxide layer; and
(f) a second transparent oxide layer deposited onto the first transparent oxide layer;
wherein said intermediate oxide layer is disposed between the thin carbon layer and the first transparent oxide layer and has a thickness between about 400 angstroms and about 1000 angstroms, and has a refractive index between about 1.5 and about 2.2. - View Dependent Claims (7, 8, 9, 10)
(i) said first transparent oxide layers have a refractive index between about 1.65 and about 2.65 and an average thickness between about 100 angstroms and about 3200 angstroms and (ii) said second transparent oxide layers have a refractive index between about 1.2 and about 1.85, and an average thickness between about 100 angstroms and about 3200 angstroms. -
9. The anti-reflective composite of claim 6 wherein said intermediate oxide layer is aluminum oxide.
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10. The anti-reflective composite of claim 6 wherein said intermediate oxide layer is zirconium oxide.
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11. An anti-reflective composite comprising
(a) a light transmissive substrate; -
(b) a hard coat deposited onto the substrate;
(c) a thin carbon layer having an average thickness between about 2 angstroms and about 100 angstroms;
(d) a first transparent oxide layer deposited onto the thin carbon layer;
(e) a second transparent oxide layer deposited onto the first transparent oxide layer; and
(f) an outermost transparent oxide layer disposed distal-most from the substrate, the outermost transparent oxide layer having an index of refraction between about 1.2 and about 1.5 and having a surface energy of less than about 40 dynes/cm. - View Dependent Claims (12)
(i) said first transparent oxide layers have a refractive index between about 1.65 and about 2.65 and an average thickness between about 100 angstroms and about 3200 angstroms and (ii) said second transparent oxide layers have a refractive index between about 1.2 and about 1.85, and an average thickness between about 100 angstroms and about 3200 angstroms.
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13. An anti-reflective composite comprising;
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(a) a light transmissive substrate;
(b) a hard coat deposited onto the substrate;
(c) an intermediate oxide layer deposited onto the hard coat, wherein said intermediate oxide layer has a thickness between about 400 angstroms and about 1000 angstroms and has a refractive index between about 1.5 and about 2.2; and
(d) at least one pair of transparent oxide layers comprising (i) a first transparent oxide layer having a refractive index between about 1.65 and about 2.65 and an average thickness between about 100 angstroms and about 3200 angstroms and (ii) a second transparent oxide layer having a refractive index between about 1.2 and about 1.85, and an average thickness between about 100 angstroms and about 3200 angstroms, wherein said intermediate oxide layer comprises aluminum oxide.
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Specification