US4019887A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for coating glass
Assignee: Pilkington Group Ltd
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Filing: 1975-06-10
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Granted: 1977-04-26
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Expires: 1995-06-10
Abstract
Abstract A coating consisting of or containing silicon is produced on glass by moving the glass, at a temperature of at least 400 DEG C, past a coating station to which silane-containing gas is supplied. The gas is released close to the glass surface into a hot zone opening towards the glass surface and at a substantially constant pressure across that surface. Non-oxidizing conditions are maintained in the hot zone, and the coating is produced by pyrolysis of the gas on the glass surface.
Inventors
- 👤 Bernard James Kirkbride
- 👤 Robert Andrew Downey
- 👤 Charles Victor Thomasson
- 👤 Joseph Earle Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 07:47
CPC Classifications
E; E06; E06B; E06B7/00; E06B7/28; C; C03; C03C; C03C17/00; C03C17/001; C03C17/002; C03C17/06; C03C17/09; C03C17/22; E06B3/00; E06B3/66; E06B3/67; E06B3/6715; C03C2217/00; C03C2217/20; C03C2217/25; C03C2217/263; C03C2217/28; C03C2217/282; C03C2218/00; C03C2218/10; C03C2218/15; C03C2218/152; C03C2218/30; C03C2218/365
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
146 words
A method of producing a silicon coating on a glass surface, comprising: moving the glass surface at a temperature of at least 400° C past a hot zone of a coating station, which hot zone extends across the glass surface and opens towards the glass surface; maintaining non-oxidising conditions in the hot zone; supplying silane-containing gas to the coating station and feeding the gas to said hot zone; cooling the silane-containing gas at the coating station as it is fed towards said hot zone; and releasing the cool silane-containing gas into the hot zone at a substantially constant pressure across that zone so that the gas is rapidly heated as it traverses the hot zone and reaches the glass surface at a substantially constant temperature and pressure across the glass surface for pyrolysis thereon to produce a silicon coating of predetermined thickness on the glass surface.
Claim 2
Independent Claim
146 words
A method of producing a silicon coating on a glass surface, comprising: moving the glass surface at a temperature of at least 400° C past a hot zone of a coating station, which hot zone extends across the glass surface and opens towards the glass surface; maintaining non-oxidising conditions in the hot zone; supplying silane-containing gas to the coating station and feeding the gas to said hot zone; cooling the silane-containing gas at the coating station as it is fed towards said hot zone; and releasing the cool silane-containing gas into the hot zone at a substantially constant pressure across that zone so that the gas is rapidly heated as it traverses the hot zone and reaches the glass surface at a substantially constant temperature and pressure across the glass surface for pyrolysis thereon to produce a silicon coating of predetermined thickness on the glass surface.
Claim 3
Dependent Claim
36 words
A method according to claim 1, further comprising regulating the composition of the gas to maintain a rate of silane pyrolysis on the hot glass surface producing said silicon coating of predetermined thickness on that surface.
Claim 4
Dependent Claim
33 words
A method according to claim 1, comprising regulating the gas flow rate to obtain a uniform coating and regulating the concentration of silane in the gas to provide the desired thickness of coating.
Claim 5
Dependent Claim
26 words
A method according to claim 1, wherein the the temperature of the glass surface at the coating station is in the range 500° to 700° C.
Claim 6
Dependent Claim
44 words
A method according to claim 1, wherein the glass surface is a surface of a continuous ribbon of glass which is advanced past the coating station, and the composition of the gas is regulated in relation to the speed of advance of the ribbon.
Claim 7
Dependent Claim
51 words
A method according to claim 5, wherein the ribbon of glass is advanced along a bath of molten metal over which a protective atmosphere is maintained, and the silane-containing gas is released into said hot zone which is located where the glass temperature is in the range 600° to 670° C.
Claim 8
Dependent Claim
46 words
A method according to claim 5, wherein the ribbon of glass is advanced through an annealing lehr, and the silane-containing gas is released into said hot zone which is located in the lehr where the glass temperature is in the range 400° C to 700° C.
Claim 9
Dependent Claim
36 words
A method according to claim 1, wherein the silane-containing gas comprises from 0.1% to 20% by volume of silane, up to 10% by volume of hydrogen, and from 70% to 99.9% by volume of inert gas.
Claim 10
Dependent Claim
14 words
A method according to claim 1, wherein the silane is monosilane (SiH 4 ).
Claim 11
Independent Claim
143 words
A method of producing a silicon coating on a hot glass surface, the method comprising: moving the hot glass surface past a hot zone of a coating station, which hot zone extends across and opens towards the hot glass surface; maintaining non-oxidising conditions in the hot zone; supplying silane-containing gas to the coating station for feeding into the hot zone; maintaining the silane-containing gas to be fed in a temperature condition sufficiently cool to avoid decomposition and deposition of silicon prior to feeding into the hot zone; releasing the cool silane-containing gas into the hot zone at a substantially constant temperature and pressure across the hot glass surface; and pyrolyzing the silane on the hot glass surface by maintaining the temperature of the glass surface passing the hot zone at a sufficiently high temperature to produce a silicon coating on the glass surface.
Claim 12
Independent Claim
143 words
A method of producing a silicon coating on a hot glass surface, the method comprising: moving the hot glass surface past a hot zone of a coating station, which hot zone extends across and opens towards the hot glass surface; maintaining non-oxidising conditions in the hot zone; supplying silane-containing gas to the coating station for feeding into the hot zone; maintaining the silane-containing gas to be fed in a temperature condition sufficiently cool to avoid decomposition and deposition of silicon prior to feeding into the hot zone; releasing the cool silane-containing gas into the hot zone at a substantially constant temperature and pressure across the hot glass surface; and pyrolyzing the silane on the hot glass surface by maintaining the temperature of the glass surface passing the hot zone at a sufficiently high temperature to produce a silicon coating on the glass surface.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-25 | 1980-10-25 | 1981-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-25 | 1984-10-25 | 1985-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-25 | 1988-10-25 | 1989-04-26 | $7700.00 | Window Closed / Lapsed |