Patent ID: 9188869
Filing Date: 2015-11-17
Classification: C08L,G03F

Abstract:
1. A method of forming a structure containing a phase-separated structure, the method comprising: purifying a block copolymer to a purity of 98% or more by washing the block copolymer with an alcohol or a saturated hydrocarbon at least twice, forming a layer containing the block copolymer on a substrate, and phase-separating the layer containing the block copolymer, wherein the block copolymer is at least one member selected from the group consisting of: a block copolymer consisting of a structural unit having an aromatic group and a block of a structural unit derived from an (α-substituted) acrylate ester; a block copolymer consisting of a block of a structural unit having an aromatic group and a block of a structural unit derived from lactic acid; and a block copolymer consisting of a block of a structural unit containing a polyhedral oligomeric silsesquioxane structure and a block of a structural unit derived from an (α-substituted) acrylate ester.