Patent ID: 6074962
Filing Date: 2000-06-13
Classification: G02F,H01L

Abstract:
A method for the formation of a silica-based coating film on the surface of a substrate which comprises the successive steps of:(a) coating the surface of the substrate with a coating solution containing a partial hydrolysis-condensation product of a trialkoxy silane compound in an organic solvent to form a coating layer;(b) drying the coating layer to give a dried coating film;(c) irradiating the dried coating film on the substrate surface with ultraviolet light in an atmosphere of an oxidizing gas;(a1) coating the surface of the coating film after step (c) with a coating solution containing a partial hydrolysis-condensation product of a trialkoxy silane compound in an organic solvent to form a second coating layer;(b1) drying the second coating layer formed in step (a1) to give a second dried coating film; and(d) subjecting the dried coating films to a baking treatment at a temperature in the range from 350 to 500.degree. C. in an atmosphere of a non-reactive gas.