Patent ID: 7070839

Claim:
A functional film comprising: an underlying layer formed on a surface of a base material and composed of a hydrolyzable compound represented by X—(SiOX 2 ) n —SiX 3 where X is at least one functional group selected from the group consisting of a halogen, an alkoxy group, and an isocyanate group and n is an integer equal to or more than 0; and a thin film provided on the underlying layer and composed of a group of molecules of a silane-based compound chemically adsorbed to a surface of the underlying layer, constituent molecules composing the underlying layer being fixed by chemical bonding to the surface of the base material and to the molecules of the silane-based compound, among portions of active hydrogens incorporated into the constituent molecules by hydrolyzing the compound, those portions remaining without being chemically bonded to the molecules of the silane-based compound being chemically bonded to each other such that the constituent molecules are bonded fixedly to each other to have a structural unit represented by the following structural formula (1) where n is an integer equal to or more than 0, the molecules of the silane-based compound having a straight carbon chain containing a photosensitive group, the photosensitive group in the straight carbon chain is polymerized fixedly in a desired direction, and the photosensitive group is a cinnamoyl group represented by the following chemical formula (3) or a chalconyl group represented by the following chemical formula (4)