Replication of micro-sized pillars in polypropylene using the extrusion coating process

Nastasia Okulova, Peter Johansen, Lars Christensen, Rafael J. Taboryski

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    A recent advancement in nano-pattern replication using roll-to-roll extrusion coating (R2R-EC) shows potential for many biomimetic applications. For further development of the technique a study of the micro-replication regime is
    carried out. In this study a full and partial replication in polypropylene (PP) of micro-sized pillars has been demonstrated using the extrusion coating process. The replication fidelity of the pillars is investigated in a systematic variation of different process parameters: the line-speed of the rolls, the extruder output, the cooling roll temperature and the pressure on the cooling roll. The parameter making biggest impact on the replication is the temperature of the cooling roll.
    The micro-sized pillars show replication behavior opposite to what was found previously for the nano-patterns. The larger structures take the time to fill in and replicate best at the lower speeds. In this article a direct comparison
    of the speed at the same coating thickness is conducted.
    Original languageEnglish
    JournalMicroelectronic Engineering
    Pages (from-to)54-57
    Publication statusPublished - 2017


    • Roll-to-roll fabrication
    • Extrusion coating
    • Polymer micro structures
    • Polypropylene
    • DEEMO process
    • Bosch process

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