| abstract |
An inorganic coating film having improved water repellency is provided. The improved surface is provided by treating an inorganic coating film with a material that is reached or adsorbed on the surface of the inorganic coat to increase water repellency. The inorganic coating to be treated may be a silicon dioxide film. The materials used to treat the film include: (1) halogenated silane compounds; (2) silane compounds having a structure including at least one bond selected from Si-H, Si-OH, Si-OR, Si-SH and Si-SR, wherein R is an organic group; (3) silane compounds having a structure including at least one of <IMAGE> wherein R1, R2 and R3 are hydrogen or an organic group and (4) reactive organic compounds having a fluorine substituting group, hydrogen fluoride or a metal fluoride. |