Patent US4740874A successfully refreshed from Google Patents.
US4770901A
Expired / Lapsed
US
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Process for formation of tin oxide film
Assignee: Nippon Sheet Glass Co Ltd
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Filing: 1986-08-04
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Granted: 1988-09-13
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Expires: 2006-08-04
Abstract
Abstract A process for formation of tin oxide film is described, wherein a glass substrate is heated to a high temperature and then tin oxide film is formed on the surface of said substrate by a thermal decomposition oxidation reaction caused by bringing a tin compound or a mixture of a tin compound and a fluorine-containing compound into contact with the surface of said glass substrate, and wherein prior to the formation of tin oxide film, said glass substrate is preliminarily brought into contact with a solution of chloride of a metal belonging to Group IVB of the Periodic Table so that a layer of a composition containing the chloride of the Group IVB metal as the primary component is formed on the surface of said substrate.
Inventors
- 👤 Yukihiro Katoh
- 👤 Hideo Kawahara
- 👤 Masato Hyohdou
- 👤 Hironobu Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:46
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/34; C03C17/3411; C03C17/3429; C03C17/3447; C03C17/3458; C23; C23C; C23C16/00; C23C16/02; C23C16/0272
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
156 words
A process for formation of a tin oxide film, wherein a glass substrate is heated to a high temperature of from 450° C. to 600° C. and then a tin oxide film is formed on the surface of said substrate by a thermal decomposition oxidation reaction caused by bringing a tin compound or a mixture of a tin compound and a fluorine-containing compound into contact with the surface of said glass substrate, and wherein prior to the formation of said tin oxide film, said glass substrate is preliminarily brought into contact with a solution of chloride of a metal belonging to Group IVB of the Periodic Table so that a layer of a composition containing the chloride of the Group IVB metal as the primary component is formed on the surface of said substrate wherein the chloride of the group IVB is contained in said solution in an amount of from 0.1 to 10.0 wt. %.
Claim 2
Dependent Claim
156 words
A process for formation of a tin oxide film, wherein a glass substrate is heated to a high temperature of from 450° C. to 600° C. and then a tin oxide film is formed on the surface of said substrate by a thermal decomposition oxidation reaction caused by bringing a tin compound or a mixture of a tin compound and a fluorine-containing compound into contact with the surface of said glass substrate, and wherein prior to the formation of said tin oxide film, said glass substrate is preliminarily brought into contact with a solution of chloride of a metal belonging to Group IVB of the Periodic Table so that a layer of a composition containing the chloride of the Group IVB metal as the primary component is formed on the surface of said substrate wherein the chloride of the group IVB is contained in said solution in an amount of from 0.1 to 10.0 wt. %.
Claim 3
Dependent Claim
26 words
A process as in claim 1, wherein said chloride of a metal belonging to Group IVB of the Periodic Table is titanium chloride TiCl 4 .
Claim 4
Dependent Claim
23 words
A process as in claim 1, wherein said chloride of a metal belonging to Group IVB of the Periodic Table is zirconium chloride.
Claim 5
Dependent Claim
23 words
A process as in claim 1, wherein said chloride of a metal belonging to Group IVB of the Periodic Table is hafnium chloride.
Claim 6
Dependent Claim
27 words
A process as in claim 1, wherein the chloride of the group IVB is contained in said solution in an amount of from 0.3 to 3.0 wt%.
Claim 7
Dependent Claim
45 words
A process as in claim 1, wherein said solution of chloride of a group IVB metal is brought into contact with said glass substrate by spraying through a nozzle mechanism onto the surface of the substrate at a temperature of from 50° to 200° C.
Claim 8
Dependent Claim
45 words
A process as in claim 5, wherein said solution of chloride of a group IVB metal is brought into contact with said glass substrate by spraying through a nozzle mechanism onto the surface of the substrate at a temperature of from 50° to 200° C.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-09-13 | 1992-03-14 | 1992-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-13 | 1996-03-14 | 1996-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-13 | 2000-03-14 | 2000-09-13 | $7700.00 | Window Closed / Lapsed |