US5368887A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing thin glass film by sol-gel method
Assignee: Sumitomo Electric Industries Ltd
•
Filing: 1993-04-23
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Granted: 1994-11-29
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Expires: 2013-04-23
Abstract
Abstract A thin glass film is formed on a substrate using a sol-gel method by applying to the substrate a hydrolyzable solution which contains a metal alkoxide, water, an alcohol and an acid, contacting the applied solution with an atmosphere containing ammonia and an alcohol to polycondensate the metal alkoxide, and heating to form the thin glass film.
Inventors
- 👤 Sumio Hoshino
- 👤 Masumi Ito
- 👤 Hiroo Kanamori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:09
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/02; C03C1/00; C03C1/006; C03C1/008; C23; C23C; C23C18/00; C23C18/02; C23C18/12; C23C18/1204; C23C18/1208; C23C18/1212; C23C18/125; C23C18/1254; C23C18/1275
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
57 words
A process for producing a glass film comprising; applying a hydrolyzable solution containing a metal alkoxide, water, an alcohol and an acid to a substrate; contacting said hydrolyzable solution with an atmosphere of a mixture of ammonia and an alcohol to polycondensate said metal alkoxide; and drying and heating said hydrolyzable solution to form a glass film.
Claim 2
Dependent Claim
57 words
A process for producing a glass film comprising; applying a hydrolyzable solution containing a metal alkoxide, water, an alcohol and an acid to a substrate; contacting said hydrolyzable solution with an atmosphere of a mixture of ammonia and an alcohol to polycondensate said metal alkoxide; and drying and heating said hydrolyzable solution to form a glass film.
Claim 3
Dependent Claim
24 words
The process according to claim 1, wherein said hydrolyzable solution is kept standing before application to adjust its viscosity to 0.1 to 10 poises.
Claim 4
Dependent Claim
40 words
The process according to claim 1, wherein said hydrolyzable solution is cooled to a temperature of -150° C. to +10° C. and then applied on said substrate cooled to the same temperature as that of said hydrolyzable solution or lower.
Claim 5
Dependent Claim
27 words
The process according to claim 1, wherein said hydrolyzable solution is subjected to a pressure of from 10 to 500 Torr to concentrate said solution before application.
Claim 6
Dependent Claim
41 words
The process according to claim 1, wherein a molar ratio of said alcohol in said hydrolyzable solution to said metal alkoxide is from 0.5:1 to 5:1, and a molar ratio of water to said metal alkoxide is from 1:1 to 10:1.
Claim 7
Dependent Claim
22 words
The process according to claim 1, wherein said applied hydrolyzable solution is polycondensated at a temperature of room temperature to 300° C.
Claim 8
Dependent Claim
22 words
The process according to claim 1, wherein said applied hydrolyzable solution is polycondensated under pressure of from atmospheric pressure to 5 Atm.
Claim 9
Dependent Claim
31 words
The process according to claim 1, wherein said metal alkoxide is at least one selected from the group consisting of methoxide, ethoxide and propoxide of silicon, titanium, germanium, aluminum or boron.
Claim 10
Dependent Claim
20 words
The process according to claim 1, wherein said hydrolyzable solution contains at least one compound of a rare earth metal.
Claim 11
Dependent Claim
17 words
The process according to claim 1, wherein said hydrolyzable solution contains at least one optically non-linear material.
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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) | 1997-11-28 | 1998-05-30 | 1998-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-11-28 | 2002-05-30 | 2002-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-11-28 | 2006-05-30 | 2006-11-29 | $7700.00 | Window Closed / Lapsed |