Methods and compositions for forming aperiodic patterned copolymer films

A method of forming copolymer structures, comprising:

• (a) providing a patterned substrate;
• (b) depositing a layer of a blended copolymer material;
• the material comprising a first block copolymer and at least one of a second copolymer, a first homopolymer and a second homopolymer on the substrate;
• and
• (c) ordering components in the copolymer material in accordance with the underlying pattern to replicate the pattern in the copolymer layer.

A method of forming copolymer structures, comprising:

• (a) providing a patterned substrate;
• (b) depositing a layer of a material comprising a block copolymer;
• and
• (c) ordering components in the copolymer material in accordance with the underlying pattern to replicate the pattern in the copolymer layer;
• wherein regions of the surface pattern interact in a highly preferential manner with at least one of the components in the copolymer material.