| abstract |
A restraining agent for use in phase separation of a layer containing a block copolymer having a plurality of kinds of polymers bonded on a substrate, comprising a resin component, wherein 20 mol% to 80 mol % Is a constituent unit derived from an aromatic ring-containing monomer; A step (1) of applying the base coat on the substrate (1) to form a layer (2) of the base coat and a layer (3) containing a block copolymer to which a plurality of kinds of polymers are bonded, A step (2) of forming a layer (3) containing the block copolymer on a surface of a layer made of a block copolymer and a step (2) And a step (3) of selectively removing an image (3a) composed of at least one polymer of a plurality of kinds of polymers constituting the copolymer. |