Block copolymers have rich phase behavior

and in the bulk they can microphase-separate to form spheral

cylindrical

b-i continuous or layered structure. When block copolymers are confined in space having certain directing features

either topological or chemical

the self-assembly process can be strongly influenced when the features approach the length of the equilibrium periodicity of the block copolymer domains. In this paper

the influences of confinement and boundary conditions on self-assembly of block copolymer were reviewed and discussed experimentally. Problems and a perspective in this research field are also discussed.