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High Density of Line Pattern by Using De-Wetting During Soft-Lithography.

Jisun Lee, Su Kyoung Lee, Jin-Mi Jung

    Journal of Nanoscience and Nanotechnology
    |September 11, 2015
    PubMed
    Summary

    This study demonstrates a novel soft-lithography technique using polymer dewetting to create highly reliable, high-density patterns. Controlling polymer molecular weight and annealing time enhances pattern reproducibility.

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    Area of Science:

    • Materials Science
    • Polymer Science
    • Nanotechnology

    Background:

    • Soft-lithography is a key technique for micro- and nanofabrication.
    • Controlling pattern formation in polymer films is crucial for advanced manufacturing.

    Purpose of the Study:

    • To develop a reliable method for creating high-density patterns using dewetting-induced soft-lithography.
    • To investigate the influence of polymer properties and processing conditions on pattern formation.

    Main Methods:

    • Utilized dewetting of polystyrene (PS) films on poly-dimethyl-siloxane (PDMS) molds.
    • Controlled thermal annealing time and molecular weight of PS.
    • Investigated the role of PS film thickness.

    Main Results:

    • Successfully generated additional line patterns through PS dewetting on PDMS molds.
    • Pattern formation was independent of PS film thickness.
    • Pattern characteristics were strongly influenced by PS molecular weight and annealing time.
    • Observed suppression of polymer chain mobility and enhanced surface tension in high molecular weight PS.

    Conclusions:

    • Dewetting-induced patterns are attributed to changes in polymer chain mobility and surface tension.
    • The developed method achieves high-density patterns with high reproducibility.
    • This technique offers a promising approach for precise pattern fabrication in materials science.