Compositions of neutral layer for directed self assembly block copolymers and processes thereof

A neutral layer composition capable upon heating of forming a crosslinked random copolymer neutral layer for directed self assembly of a block copolymer coated on top of the crosslinked neutral layer wherein the neutral layer composition comprises;

• (i) at least one random copolymer of structure (I) having at least one unit of structure (1), at least one unit of structure (2) and at least one unit of structure (3)
• where R1 is selected from the group consisting of a C1-C8 alkyl, C1-C8 fluoroalkyl, C1-C8 partially fluorinated alkyl moiety, C4-C8 cycloalkyl, C4-C8 cyclofluoroalkyl, C4-C8 partially fluorinated cycloalkyl, and a C2-C8 hydroxyalkyl;
• R2, R3 and R5 are independently selected from a group consisting of H, C1-C4 alkyl, CF3 and F;
• R4 is selected from the group consisting of H, C1-C8 alkyl, C1-C8 partially fluorinated alkyl moiety and C1-C8 fluoroalkyl, n ranges from 1 to 5, R6 is selected from the group consisting of H, F, C1-C8 alkyl and a C1-C8 fluoroalkyl and m ranges from 1 to 3, and
• wherein the neutral layer has unit 1 ranging from about 20 mole % to about 80 mole %;
• unit 2 ranging from about 20 mole % to about 80 mole % and unit 3 ranging from about 15 mole % to about 45 mole %, and
• ii) a solvent.