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Macromolecular Research

, Volume 17, Issue 3, pp 181–186 | Cite as

Ordered micropatterns by confined dewetting of an imprinted polymer thin film and their microlens application

  • Geuntak Lee
  • Bokyung Yoon
  • Himadri Acharya
  • Cheolmin Park
  • June Huh
Article

Abstract

We fabricated ordered micro/nano patterns induced by controlled dewetting on the topographically patterned PS/P4VP bilayer thin film. The method is based on utilizing microimprinting lithography to induce a topographically heterogeneous bilayer film that allows the controlled dewetting upon subsequent thermal annealing. The dewetting that was initiated strictly at the boundary of the thicker and thinner regions was guided by the presence of the topographic structure. The dewetting front velocity of the microdomains in the confined regions was linearly proportional to the measurement time, which enabled us to control the size of the dewet domain with annealing time. In particular, the submicron sized dot arrays between lines were generated with ease when the dewetting was confined into geometry with a few microns in size. The kinetically driven, non-lithographical pattern structures accompanied the pattern reduction to 400%. The pattern arrays on a transparent glass substrate were especially useful for noncircular microlens arrays where the focal length of the lens was easily tunable by controlling the thermal annealing.

Keywords

dewetting microimprinting bilayer self-assembly microlens micropattern 

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Copyright information

© The Polymer Society of Korea and Springer 2009

Authors and Affiliations

  • Geuntak Lee
    • 1
  • Bokyung Yoon
    • 1
  • Himadri Acharya
    • 1
  • Cheolmin Park
    • 1
  • June Huh
    • 2
  1. 1.Department of Materials Science and EngineeringYonsei UniversitySeoulKorea
  2. 2.Department of Materials Science and EngineeringSeoul National UniversitySeoulKorea

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