Appeal 2007-4227
Application 10/409,417
B. Findings of Fact (FF)
The following findings of fact and any set out in the Discussion are
supported by a preponderance of the evidence of record.
417 Application
1. Application 10/409,417 ("417 Application") was filed 8 April 2003.
2. According to the inventors, the application relates to crystalline titania
films and methods of making them. (417 Application at 1, ¶ 1.)
3. The application states that crystalline titania films are typically
deposited at high temperatures, such as 1200°F to 1500°F (648°C to 800°C).
(417 Application at 1, ¶ 3.)
4. However, if the deposition temperature is below about 1150°F
(620°C), the titania films are said to tend to be amorphous. (417 Application
at 1, ¶ 3.)
5. Amorphous titania films are said to be less durable and therefore less
desirable in many applications compared to crystalline titania films.
(417 Application at 1, ¶ 3.)
6. According to the application, it is known to deposit a titania film on a
float glass ribbon in a float bath via a chemical vapor deposition (CVD)
apparatus. (417 Application at 1, ¶ 4.)
7. Another method of depositing titania films is said to be spray
pyrolysis, in which the precursor materials are dissolved in a solvent and
sprayed onto a substrate such as a float glass ribbon inside or outside of a
float bath. (417 Application at 2, ¶ 5.)
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