Patent ID: 9738746
Date: 2017-08-22
CPC Classifications: C08F,C08G,C09D,G03F,H01L

Claim:
1. A composition for pattern formation comprising: a block copolymer that forms a phase separation structure by directed self-assembly; and a solvent, wherein the block copolymer comprises a first block composed of a first repeating unit that comprises a silicon atom, a second block composed of a second repeating unit that does not include a silicon atom, and a first group that bonds to at least one end of a main chain and links to the first block, wherein the first group is a monovalent group that forms a compound having ClogP of no less than 2.4 provided that a methyl group is bonded to an atom on a side of the main chain, and wherein the first group does not comprise a hetero atom.