Patent ID: 7618675

Claim:
A pattern forming method using a phase separation structure of a block copolymer, comprising: coating a substrate including a groove structure pre-formed thereon, with a solution of the block copolymer comprising at least one block comprising a mesogen group represented by the following formula (I): wherein, P is a divalent group selected from the group consisting of: Y, if present, is selected from the group consisting of —F, —Cl, —Br, —CH 3 , —(CH 2 ) n —CH 3 , —OCH 3 , —OH, —CN and —NO 2 , X is a binding group which is selected from the group consisting of a single bond, —COO—, —OCH 2 —, —CH═N—, —C≡C—, —O—, CH 2 —, —COS—, —CON— and —N═N—, m is a numerical value equal to or greater than zero, and n is a numerical value equal to or greater than 2, said mesogen group providing an intermolecular force suitable for crystallinity; and causing the block copolymer to self-assemble in the groove structure, thereby forming block copolymer assemblies in such a way as to be regularly arrayed.