Coating processes – With post-treatment of coating or coating material – Heating or drying
Patent
1984-08-30
1986-10-14
Smith, John D.
Coating processes
With post-treatment of coating or coating material
Heating or drying
427 531, 427 74, 427108, 4271263, 427165, 427226, B05D 302
Patent
active
046172068
ABSTRACT:
Providing a transparent layer of an oxide of an element from group IVa of the Periodic Table, notably TiO.sub.2, by providing a substrate with a solution of a compound of the element which upon heating is converted into the relevant oxide, drying the film and heating the dried film so as to form the transparent layer of the oxide. The oxide thus obtained is a form having a comparatively low refractive index. By heating the product, after providing the film, rapidly to a temperature of above 700.degree. C., preferably above 1,000.degree. C., keeping it at this temperature for some time and then rapidly cooling it again, a modification having a higher refractive index (for example, for TiO.sub.2 rutile) is obtained.
REFERENCES:
patent: 3916041 (1975-10-01), Chu
patent: 4129434 (1978-12-01), Plumat
patent: 4232062 (1980-11-01), Okino
patent: 4252841 (1981-02-01), Kinugawa
patent: 4492721 (1985-01-01), Joosten
Kern et al., "Titanium Dioxide Antireflection Coating for Silicon Solar Cells by Spray Deposition" RCA Review, vol. 41, Jun. 1980, pp. 133-179.
Biermann Udo K. P.
Haisma Jan
Heller Petrus
Pasmans Johannes M. M.
Smith John D.
Spain Norman N.
U.S. Philips Corporation
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