According to the present invention, a neutral layer composition comprises a random copolymer having a unit of chemical formula 1. In the chemical formula 1, R_1 is hydrogen or an alkyl group having 1 to 4 carbon atoms; Q_1 is a single bond, -O-L_1-C(=O)- or -O-L_1-; X_1 is -N(R_2)-L_2-C(=O)-O-, O-C(=O)-, -C(=O)-O-, a urethane linker or a urea linker; and Y_1 is a chain having at least four chain forming atoms. According to the present invention, a neutral layer capable of effectively controlling the orientation of various block copolymers can be formed.
COMPOSITON FOR NEURAL LAYER