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US4788079A
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Method of making haze-free tin oxide coatings
Assignee: Arkema Inc
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Filing: 1987-11-03
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Granted: 1988-11-29
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Expires: 2007-11-03
Abstract
Abstract Haze-free tin oxide coatings are made from an organotin compound which ordinarily gives only hazy coatings. The improvement comprises first forming an undercoat of a haze-free tin oxide film on a substrate, preferably by decomposition of monophenyltin trichloride. Thereafter the tin oxide overcoating assumes the haze-free characteristics of the undercoat film.
Inventors
- 👤 Georg H. Lindner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 06:11
CPC Classifications
C; C23; C23C; C23C16/00; C23C16/22; C23C16/30; C23C16/40; C23C16/407; C03; C03C; C03C17/00; C03C17/22; C03C17/23; C03C17/245; C03C17/2453
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
99 words
A method of forming haze-free tin oxide coatings on a substrate from an organotin compound which usually forms only hazy films under advantageous deposition conditions which comprises: forming a haze-free tin oxide undercoat film on said substrate by contacting said substrate at a temperature of 450° C. to 650° C. with a vapor of monophenyltin trichloride and thereafter depositing a desired tin oxide overcoat from the thermal decomposition of a tin compound selected from the group of tin tetrachloride, dibutyltin diacetate, dimethyl tin chloride and monobutyltin trichloride whereby the tin oxide overcoat assumes the haze-free characteristics of said undercoat.
Claim 2
Independent Claim
99 words
A method of forming haze-free tin oxide coatings on a substrate from an organotin compound which usually forms only hazy films under advantageous deposition conditions which comprises: forming a haze-free tin oxide undercoat film on said substrate by contacting said substrate at a temperature of 450° C. to 650° C. with a vapor of monophenyltin trichloride and thereafter depositing a desired tin oxide overcoat from the thermal decomposition of a tin compound selected from the group of tin tetrachloride, dibutyltin diacetate, dimethyl tin chloride and monobutyltin trichloride whereby the tin oxide overcoat assumes the haze-free characteristics of said undercoat.
Claim 3
Dependent Claim
11 words
A method according to claim 1 wherein the substrate is glass.
Claim 4
Dependent Claim
17 words
A method according to claim 1 wherein said tin oxide overcoat is a conductive tin oxide coating.
Claim 5
Dependent Claim
24 words
A method according to claim 1 wherein both said tin oxide undercoat and said tin oxide overcoat have a haze of less than 1%.
Claim 6
Dependent Claim
23 words
A method according to claim 3 wherein said conductive tin oxide overcoat is formed from a monoalkyltin trichloride and a fluorine dopant therewith.
Claim 7
Dependent Claim
20 words
A method according to claim 5 wherein said conductive tin oxide coating is deposited from monobutyltin trichloride and trifluoroacetic acid.
Claim 8
Dependent Claim
17 words
A method according to claim 1 wherein said undercoat has a thickness of at least 10 nm.
Claim 9
Dependent Claim
20 words
A method according to claim 1 wherein said overcoat tin oxide is made by chemical vapor deposition from monobutyltin trichloride.
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) | 1991-11-29 | 1992-05-30 | 1992-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-29 | 1996-05-30 | 1996-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-29 | 2000-05-30 | 2000-11-29 | $7700.00 | Window Closed / Lapsed |