Patent ID: 9715172
Date: 2017-07-25
CPC Classifications: G03F,H01L

Claim:
1. A method for forming a patterned topography on a substrate, comprising: providing a patterned substrate comprising exposed features formed atop, the exposed features forming an existing exposed topography, and a template for directed self-assembly (DSA) surrounding the existing exposed topography; filling the template with a block copolymer (BCP) to directly contact and cover the existing exposed topography; annealing the block copolymer (BCP) within the template to drive self-assembly in alignment with the existing exposed topography; developing the annealed block copolymer (BCP) to expose a directed self-assembly (DSA) pattern immediately overlying the existing exposed topography, and transferring the directed self-assembly pattern into the existing exposed topography, to form a patterned existing exposed topography, wherein the patterned existing exposed topography comprises a pattern of cut-away and uncut portions of the existing exposed topography.