| abstract |
An undercoat agent used for phase separating a layer containing a block copolymer having a block of a structural unit derived from an (α-substituted) acrylate ester on a substrate, and which contains a resin component including a structural unit represented by formula (ba0-1), and/or a structural unit represented by formula (ba0-2), and a structural unit (ba0-3) having a substrate interacting group, n n n n n n n n n n wherein R represents a hydrogen atom, an alkyl group of 1 to 5 carbon atoms or a halogenated alkyl group of 1 to 5 carbon atoms, R 1 and R 2 represent a halogen atom or an organic group of 1 to 20 carbon atoms which may contain an oxygen atom, a halogen atom, or a silicon atom, and n is 1 to 5. |