Patent ID: 9412611
Filing Date: 2016-08-09
CPC Classification: G03F,H01L

Claim Text:
1. A method for forming a patterned topography on a substrate, comprising: providing a substrate with a plurality of lines formed atop; applying a first planarization layer on the plurality of lines; applying a first antireflective layer over the first planarization layer; applying a first layer of radiation-sensitive material over the first antireflective layer; patterning the first layer of radiation-sensitive material to form a first radiation-sensitive material pattern; transferring the first radiation-sensitive material pattern into the first planarization layer by etching the first antireflective layer and first planarization layer to partially expose the plurality of lines, the exposed portions of the plurality of lines forming first exposed line portions; stripping any remaining portions of the first radiation-sensitive material pattern and the first antireflective layer to leave the first exposed line portions surrounded by a first template for directed self-assembly (DSA); optionally treating the first exposed line portions or the first template, or both to alter at least one surface property of the first exposed line portions or the first template; filling the first template with a first block copolymer (BCP) to cover the first exposed line portions; annealing the first block copolymer (BCP) within the first template to drive self-assembly in alignment with the first exposed line portions; developing the annealed first block copolymer (BCP) to expose a first directed self-assembly (DSA) pattern immediately overlying the first exposed line portions; etching the first exposed line portions using the first directed self-assembly (DSA) pattern as a mask, to form a first set of line cuts in the first exposed line portions; and stripping the first directed self-assembly (DSA) pattern from the substrate.