EP0348185A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Coatings on glass
Assignee: Pilkington Group Ltd
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Filing: 1989-06-22
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Granted: —
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Expires: 2009-06-22
Abstract
Abstract Coatings, which act as barrier layers to inhibit migration of alkali metal ions from a glass surface and/or act as colour suppressing underlayers for overlying infra-red reflecting or electrically conducting layers, are deposited by pyrolysis of a gaseous mixture of a silane, an unsaturated hydrocarbon and an oxygen-containing gas other than carbon dioxide which does not react with the silane at room temperature on a hot glass surface at a temperature of 600°C to 750°C
Inventors
- 👤 Michael Stuart Jenkins
- 👤 Andrew Fraser Simpson
- 👤 David Anthony Porter
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 06:42
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/22; C03C17/23; C03C17/245; C03C17/34; C03C17/3411; C03C17/3417; C03C2217/00; C03C2217/20; C03C2217/21; C03C2217/213; C03C2217/28; C03C2217/282; C03C2218/00; C03C2218/10; C03C2218/15; C03C2218/152
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
75 words
A process for forming an underlayer on a glass surface comprising directing on to the hot glass surface at a temperature of 600°C to 750°C a gaseous mixture, characterised in that the gaseous mixture is a mixture of a silane, an unsaturated hydrocarbon compound and an oxygen-containing gas other than carbon dioxide which does not react with the silane at room temperature, thereby depositing a transparent layer containing silicon and oxygen on the glass surface.
Claim 2
Dependent Claim
75 words
A process for forming an underlayer on a glass surface comprising directing on to the hot glass surface at a temperature of 600°C to 750°C a gaseous mixture, characterised in that the gaseous mixture is a mixture of a silane, an unsaturated hydrocarbon compound and an oxygen-containing gas other than carbon dioxide which does not react with the silane at room temperature, thereby depositing a transparent layer containing silicon and oxygen on the glass surface.
Claim 3
Dependent Claim
14 words
A process as claimed in Claim 1, wherein the oxygen-containing gas is carbon monoxide.
Claim 4
Dependent Claim
22 words
A process as claimed in Claim 1, wherein the oxygen-containing gas is an organic compound chosen from acetone, dimethylether, acetaldehyde and methanol.
Claim 5
Dependent Claim
14 words
A process as claimed in Claim 1, wherein the oxygen-containing gas is ethylene oxide.
Claim 6
Dependent Claim
29 words
A process as claimed in any of the preceding claims, wherein the unsaturated hydrocarbon compound used in depositing the underlayer is an olefin containing 2 to 4 carbon atoms.
Claim 7
Dependent Claim
14 words
A process as claimed in Claim 5, wherein the unsaturated hydrocarbon compound is ethylene.
Claim 8
Dependent Claim
28 words
A process as claimed in any one of the preceding claims, which additionally comprises the step of depositing an infra-red reflecting and/or electrically conducting layer over the underlayer.
Claim 9
Dependent Claim
37 words
A process as claimed in any one of Claims 1 and 3 to 6, which additionally comprises the step of applying a layer sensitive to the migration of alkali metal ions from the glass over the underlayer.
Claim 10
Dependent Claim
21 words
A process as claimed in any of the preceding claims, wherein a layer of semiconductor metal is deposited over the underlayer.
Claim 11
Dependent Claim
65 words
A process as claimed in any of the preceding claims wherein the proportions of the component gases present in the gaseous mixture used to deposit the underlayer and the flow rate of the gaseous mixture over the hot glass surface are regulated to deposit an underlayer having a thickness in the range 60nm to 80nm and a refractive index in the range 1.6 to 1.8.
Claim 12
Dependent Claim
93 words
A process as claimed in any of the preceding claims wherein the proportions of the component gases present in the gaseous mixture used to deposit the underlayer and the flow rate of the gaseous mixture over the _hot glass surface are regulated to deposit an underlayer which has a thickness and refractive index such that the glass coated with the underlayer has a light transmission within 2% of the light transmission of the uncoated glass and which provides an effective barrier, as herein defined, to migration of alkali metal ions from the glass.
Claim 13
Dependent Claim
16 words
Glass coated with an underlayer by a process as claimed in any of the preceding claims.
References Cited (Backward Citations)
GB2035986A
Cited
FR2545983A2
Cited
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