Patent ID: 7501185

Claim:
A film-forming composition comprising: a compound having a cage structure; and an organic solvent, wherein a ratio of all carbon atoms of the cage structure to all carbon atoms of a total solid content of the film-forming composition is 50-95% and wherein the compound having a cage structure is a polymer of at least one compound represented by formula (I): wherein R represents a hydrogen atom, an alkyl group having from 1 to 10 carbon atoms, an alkenyl group having from 2 to 10 carbon atoms, an alkynyl group having from 2 to 10 carbon atoms, an aryl group having from 6 to 20 carbon atoms or a silyl group having from 0 to 20 carbon atoms; m represents an integer of from 1 to 14; X represents a halogen atom, an alkyl group having from 1 to 10 carbon atoms, an alkenyl group having from 2 to 10 carbon atoms, an aryl group having from 6 to 20 carbon atoms or a silyl group having from 0 to 20 carbon atoms; and n represents an integer of from 0 to 13.