Photo-induced hydrophilic article and method of making same
First Claim
Patent Images
1. An article, comprising:
- a substrate having at least one surface; and
a photo-induced hydrophilic coating deposited over at least a portion of the at least one surface, wherein an outer surface of the photo-induced hydrophilic coating has a root mean square roughness of less than or equal to 2 nm; and
wherein the photo-induced hydrophilic coating is deposited by a process selected from chemical vapor deposition, magnetron sputtered vacuum deposition, and spray pyrolysis.
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Accused Products
Abstract
Methods and articles are disclosed in which a substrate is provided with a photo-induced hydrophilic surface by forming a photo-induced hydrophilic coating on the substrate by spray pyrolysis, chemical vapor deposition, or magnetron sputter vacuum deposition. The coating can have a thickness of 50 Å to 500 Å, a root mean square roughness of less than 5, preferably less than 2, and photocatalytic activity of less than 3.0×10−3 cm−1 min−1±2.0×10−3 cm−1 min−1. The substrate includes glass substrates, including glass sheets and continuous float glass ribbons.
69 Citations
75 Claims
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1. An article, comprising:
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a substrate having at least one surface; and
a photo-induced hydrophilic coating deposited over at least a portion of the at least one surface, wherein an outer surface of the photo-induced hydrophilic coating has a root mean square roughness of less than or equal to 2 nm; and
wherein the photo-induced hydrophilic coating is deposited by a process selected from chemical vapor deposition, magnetron sputtered vacuum deposition, and spray pyrolysis. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. An article, comprising:
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a float glass ribbon having at least one surface; and
a photo-induced hydrophilic coating deposited directly on at least a portion of the at least one surface, wherein the photo-induced hydrophilic coating is deposited directly on the float glass ribbon in a molten metal bath.
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37. An article, comprising:
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a substrate having at least one surface; and
a photo-induced hydrophilic coating deposited over at least a portion of the at least one surface, wherein the photo-induced hydrophilic coating has a photocatalytic activity of less than or equal to 3×
10−
3 cm−
1 min−
1.
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38. An article, comprising:
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a substrate having at least one surface;
a photo-induced hydrophilic coating deposited over at least a portion of the at least one surface, wherein the substrate is a float glass ribbon located in a molten metal bath, wherein the photo-induced hydrophilic coating has a thickness of 500 Å
or less, andwherein the photo-induced hydrophilic coating is deposited over the at least one surface in a molten metal bath by chemical vapor deposition.
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39. An article, comprising:
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a substrate having at least one surface; and
a photo-induced hydrophilic coating deposited over at least a portion of the at least one surface, wherein the photo-induced hydrophilic coating is deposited by chemical vapor deposition at a temperature in the range of 500°
C. to 1200°
C., and wherein the photo-induced hydrophilic coating has a thickness of 500 Å
or less.
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40. A method of forming a photo-induced hydrophilic coating over at least a portion of a substrate, comprising the steps of:
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providing a substrate having a first surface and a second surface, with at least one of the surfaces having tin diffused therein;
depositing a metal oxide precursor from a coating device onto at least one of the surfaces by a process selected from chemical vapor deposition, spray pyrolysis, and magnetron sputtered vacuum deposition; and
heating the substrate to a temperature sufficient to decompose the metal oxide precursor to form the photo-induced hydrophilic coating having a root mean square roughness of 2 nm or less. - View Dependent Claims (41, 42, 43, 44, 45, 46, 47, 48, 49, 53)
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50. A method of forming a photo-induced hydrophilic coating over at least a portion of a substrate, comprising the steps of:
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providing a float glass ribbon in a molten metal bath;
depositing a metal oxide precursor material from a coating device directly onto a top surface of the glass ribbon by chemical vapor deposition; and
heating the glass ribbon to a temperature sufficient to decompose the metal oxide precursor material to form the photo-induced hydrophilic coating. - View Dependent Claims (51)
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52. A method of forming a photo-induced hydrophilic coating over at least a portion of a substrate, comprising the steps of:
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providing a substrate having at least one surface;
depositing a metal oxide precursor material from a CVD coating device over at least a portion of the at least one surface;
heating the substrate to a temperature in the range of 400°
C. to 1200°
C. to decompose the metal oxide precursor material to form the photo-induced hydrophilic coating; and
providing sufficient precursor material such that the photo-induced hydrophilic coating has a thickness of 500 Å
or less.
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54. An article, comprising:
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a transparent substrate having at least one surface; and
a transparent, non-porous, photo-induced hydrophilic coating deposited over at least a portion of the at least one surface, wherein an outer surface of the photo-induced hydrophilic coating has a root mean square roughness of less than 2 nm, wherein the photo-induced hydrophilic coating is deposited by a process selected from chemical vapor deposition, magnetron sputtered vacuum deposition, and spray pyrolysis, and wherein the photo-induced hydrophilic coating has a thickness of less than or equal to 500 Å
. - View Dependent Claims (55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70)
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71. An article, comprising:
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a glass substrate having at least one surface;
a non-porous, photo-induced hydrophilic coating consisting essentially of at least one metal oxide and/or metal alloy oxide selected from titanium oxides, silicon oxides, aluminum oxides, iron oxides, silver oxides, copper oxides, tungsten oxides, zinc/tin alloy oxides, zinc stannates, molybdenum oxides, zinc oxides, strontium titanate, cobalt oxides, chromium oxides, and mixtures or combinations thereof deposited over at least a portion of the at least one surface; and
at least one additional coating located between the photo-induced hydrophilic coating and the substrate, wherein an outer surface of the photo-induced hydrophilic coating has a root mean square roughness of less than 2 nm, wherein the photo-induced hydrophilic coating is deposited by a process selected from chemical vapor deposition, magnetron sputtered vacuum deposition, and spray pyrolysis, wherein the photo-induced hydrophilic coating has a thickness of less than or equal to 500 Å
, and wherein the photo-induced hydrophilic coating has a photocatalytic activity of less than or equal to 3×
10−
3 cm−
1 min−
1.
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72. A method of forming a photo-induced hydrophilic coating over at least a portion of a substrate, comprising the steps of:
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providing a substrate having a first surface and a second surface;
depositing a metal oxide precursor from a coating device onto at least one of the surfaces by a process selected from chemical vapor deposition, spray pyrolysis, and magnetron sputtered vacuum deposition; and
heating the substrate to a temperature sufficient to decompose the metal oxide precursor to form a non-porous, photo-induced hydrophilic coating having a root mean square roughness of 2 nm or less. - View Dependent Claims (73, 74, 75)
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Specification