EP0174727B1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Coated products
Assignee: Pilkington Group Ltd
•
Filing: 1985-07-31
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Granted: 1991-04-24
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Expires: 2005-07-31
Abstract
No abstract record available.
Inventors
- 👤 David Anthony Porter
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 01:34
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/34; C03C17/3411; C03C17/3417; G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/133337
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
117 words
A method of reducing diffusion of alkali metal ions from a glass containing alkali metal ions into an overlying layer which method comprises providing between the glass and the overlying layer a transparent barrier coating containing silicon and oxygen applied by pyrolysis of a silane gas, which coating, when present on clear float glass up to 6mm thick, results in the coated glass having a light transmission of at least 75%, characterised in that the silane is pyrolysed on a glass surface above 600°C in the presence of a gaseous electron donating compound, whereby oxygen from the glass is incorporated with silicon to form a transparent barrier coating up to 50 nm thick on the glass surface.
Claim 2
Independent Claim
110 words
A method of coating a glass containing alkali metal ions in which a silane gas is pyrolysed on the glass surface above 600°C in the presence of a gaseous electron donating compound, whereby oxygen from the glass is incorporated with silicon to form on the glass surface a transparent barrier coating up to 50 nm thick containing silicon and oxygen, which coating, when present on clear float glass up to 6 mm thick, results in the coated glass having a light transmission of at least 75%, characterised in that a layer sensitive to the diffusion of alkali metal ions from the glass is subsequently applied over the coated glass surface.
Claim 3
Dependent Claim
16 words
A method according to Claim 1 or 2 wherein the silane gas used is monosilane (SiH₄).
Claim 4
Independent Claim
19 words
A method according to any of Claims 1 to 3 wherein the silane is diluted with an inert gas.
Claim 5
Independent Claim
20 words
A method according to any of Claims 1 to 4 wherein the electron donating compound used does not contain oxygen.
Claim 6
Dependent Claim
21 words
A method according to Claim 5 wherein the gaseous electron donating compound is an olefin containing 2 to 4 carbon atoms.
Claim 7
Dependent Claim
14 words
A method according to Claim 6 wherein the gaseous electron donating compound is ethylene.
Claim 8
Independent Claim
28 words
A method according to any of Claims 1 to 7 wherein the ratio of the gaseous electron donating compound to silane is from 0.5:1 to 15:1 by volume.
Claim 9
Independent Claim
25 words
A method according to any of Claims 1 to 8 wherein the transparent barrier coating is applied to glass not more than 2 mm thick.
Claim 10
Independent Claim
36 words
A method according to any of Claims 1 to 9 wherein the barrier coating is applied to a ribbon of float glass as it is advanced over the molten metal bath on which it is formed.
Claim 11
Independent Claim
44 words
A method according to any of Claims 2 to 10 in which the layer sensitive to the diffusion of alkali metal ions is applied by sputtering, by chemical vapour deposition or by spraying reactants in liquid or solid form onto the coated glass surface.
Claim 12
Dependent Claim
21 words
A method according to Claim 11 wherein the said layer applied is a light transmitting layer of a doped metal oxide.
Claim 13
Dependent Claim
119 words
Electroconductive flat glass comprising a glass substrate containing alkali metal ions, coated with a transparent barrier coating up to 50 nm thick containing silicon and oxygen by pyrolysis of a silane gas, which coating, when present on clear float glass up to 6mm thick, results in the coated glass having a light transmission of at least 75%, and an electroconductive metal oxide layer having a resistivity of less than 500 ohms per square over the barrier layer characterised in that the silane gas is pyrolysed on a glass surface above 600°C in the presence of a gaseous electron donating compound whereby oxygen from the glass is incorporated with silicon to form the transparent barrier coating on the glass surface.
Claim 14
Dependent Claim
116 words
Infra red reflecting flat glass comprising a glass substrate containing alkali metal ions, coated with a transparent barrier layer up to 50 nm thick containing silicon and oxygen by pyrolysis of a silane gas, which coating, when present on clear float glass up to 6mm thick, results in the coated glass having a light transmission of at least 75%, and a light transmitting infra red reflecting doped metal oxide layer over the barrier coating characterised in that the silane gas is pyrolysed on a glass surface above 600°C in the presence of a gaseous electron donating compound whereby oxygen from the glass is incorporated with silicon to form the transparent barrier coating on the glass surface.
Claim 15
Dependent Claim
101 words
Flat glass up to 2 mm thick with a transparent barrier coating up to 50 nm thick containing silicon and oxygen deposited by pyrolysis of a silane containing gas on the glass surface, which coating, when present on clear float glass up to 6mm thick, results in the coated glass having a light transmission of at least 75%, characterised in that the silane containing gas is pyrolysed on the glass surface above 600°C in the presence of a gaseous electron donating compound whereby oxygen from the glass is incorporated with silicon to form the transparent barrier coating on the glass surface.
Claim 16
Dependent Claim
16 words
Glass according to Claim 15 wherein the gaseous electron donating compound used does not contain oxygen.
Claim 17
Dependent Claim
23 words
Glass according to Claim 15 or Claim 16 wherein the gaseous electron donating compound is an olefin containing 2 to 4 carbon atoms.
Claim 18
Dependent Claim
13 words
Glass according to Claim 16 wherein the gaseous electron donating compound is ethylene.
Claim 19
Dependent Claim
156 words
A liquid crystal display device comprising two opposed electroconductive layers with a liquid crystal material between the layers and an alignment layer over each said electroconductive layer in contact with the liquid crystal material, in which at least one of said electroconductive layers is supported on a glass substrate up to 2 mm thick containing alkali metal ions, and, between said electroconductive layer and the glass, there is provided a transparent barrier coating up to 50 nm thick containing silicon and oxygen deposited on the glass surface by pyrolysis of silane, which coating, when present on clear float glass up to 6mm thick, results in the coated glass having a light transmission of at least 75%, characterised in that the silane is pyrolysed on the glass surface above 600°C in the presence of a gaseous electron donating compound whereby oxygen from the glass is incorporated with silicon to form the transparent barrier on the glass surface.
References Cited (Backward Citations)
No citation records indexed.
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