Glass manufacturing – Processes of manufacturing fibers – filaments – or preforms – With measuring – controlling – sensing – programming – timing,...
Patent
1995-06-05
1997-08-26
Griffin, Steven P.
Glass manufacturing
Processes of manufacturing fibers, filaments, or preforms
With measuring, controlling, sensing, programming, timing,...
65386, 65430, 65444, 65 605, 65 608, 427165, C03B 3707, C03C 2502
Patent
active
056606117
ABSTRACT:
A method for producing an oxide glass thin film is provided, in which volatilization of additives in a porous film from which the thin film is formed is effectively suppressed, and which the oxide glass film has a desired arrangement of refractive index with a low optical loss. According to this method, glass fine particles mainly containing SiO.sub.2 with a first additive are deposited on a substrate to form a porous thin film. A gas containing a second additive is supplied to a first chamber and heated to a first predetermined temperature profile to provide a heated gas containing an oxide. After disposing the substrate in a second chamber communicated with the first chamber, the substrate is heated to make the deposited porous glass into transparent glass while controlling a temperature in the second chamber according to a second temperature profile. A carrier gas is flowed from the first chamber to the second chamber to transfer the heated gas and oxide from the first chamber to the second chamber during heating. The temperature of the first predetermined temperature profile is maintained higher than the temperature of the second predetermined temperature profile at the same time. In addition, the heated gas contains a component that is also present in the first additive.
REFERENCES:
patent: 3653862 (1972-04-01), Lynch
patent: 3801294 (1974-04-01), Schultz et al.
patent: 3934061 (1976-01-01), Keck et al.
patent: 3954431 (1976-05-01), Fleming, Jr. et al.
patent: 4597787 (1986-07-01), Jacobson
patent: 4642129 (1987-02-01), Douklias et al.
patent: 4787927 (1988-11-01), Mears et al.
patent: 4799946 (1989-01-01), Ainslie et al.
patent: 5039325 (1991-08-01), Miller et al.
Kingery et al., Introduction to Ceramics, Second Edition, 1976, pp. 402-403, Wiley.
Aikawa Haruhiko
Hirose Chizai
Ishikawa Shinji
Kanamori Hiroo
Saitoh Masahide
Griffin Steven P.
Sumitomo Electric Industries Ltd.
LandOfFree
Method for producing glass thin film does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for producing glass thin film, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for producing glass thin film will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1984994