| 摘要 |
PROBLEM TO BE SOLVED: To obtain a cage-shaped silsesquioxane-containing film suitable for a reflection preventing film good in optical characteristics by coating a base material with a composite compsn. prepared by mixing cage-shaped silsesquioxane with an org. or inorg. polymer. SOLUTION: An org. polymer may be used independently or may be used as a combination of two or more kinds of org. polymers or may be used together with a low.mol. wt. org. compd. Any one of metal, glass, silicon and a resin may be used as a base material but a transparent base material is pref. By adding cage-shaped silsesquioxane, fine gaps can be simply formed in a film and, as a result, the refractive index of the film lowers and the dielectric constant among physical properties of the film also lowers. That is, by coating the base material with cage-shaped silsesquioxane by a binder, a film low in refractive index and dielectric constant can be formed and a film improved in optical characteristics like a reflection preventing film can be formed and the strength or durability of the film is also improved.
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