Circular nanopatterns over large areas from the self-assembly of block copolymers guided by shallow trenches

Sung Woo Hong, Xiaodan Gu, June Huh, Shuaigang Xiao, Thomas P. Russell

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

We report the fabrication of ultradense circular nanolines of block copolymer (BCP) microdomains over macroscopic areas. These lines were generated by the directed self-assembly (DSA) of BCPs on the topographically patterned substrates, where the trenches with circular shape are patterned on a flat substrate. The width of the trench and the distance between trenches are varied for commensurability issues, and difference BCPs are used to demonstrate the generality of this strategy. When a commensurability condition is satisfied, BCPs on the topographically patterned substrates undergo a DSA with solvent annealing, resulting in a flat film with an areal density amplification of the circular patterns over large areas. The methodology described here may provide an easy approach to high densities of circularly shaped nanopatterns for data storage device manufacturing.

Original languageEnglish
Pages (from-to)2855-2860
Number of pages6
JournalACS nano
Volume5
Issue number4
DOIs
Publication statusPublished - 2011 Apr 26
Externally publishedYes

Keywords

  • areal density
  • block copolymer
  • circular patterns
  • solvent annealing
  • trench

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

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