Patent ID: 9587065
Date: 2017-03-07
CPC Classifications: C08F,C08L,G03F

Claim:
1. A composition, comprising: a block copolymer that comprises a first acid labile group at an end of a main chain of the block copolymer, the first acid labile group being capable of being dissociated by an acid or heat; and a solvent, wherein the first acid labile group is a carboxy protecting group with which a hydrogen atom of a carboxy group is substituted, a hydroxyl protecting group with which a hydrogen atom of a hydroxy group is substituted, or both thereof, the carboxy protecting group is at least one protecting group selected from the group consisting of a trialkylsilyl group, a 1-alkoxyalkyl group, a cyclic ether, and an alkyl group having a quaternary carbon atom represented by formula (i), and the hydroxy protecting group is at least one protecting group selected from the group consisting of a group forming an acetal structure, and an acyl group: wherein R