Laser ablated micropillar energy directors for ultrasonic welding of microfluidic systems

Carl Esben Poulsen, Kasper Kistrup, Nis Korsgaard Andersen, Rafael J. Taboryski, Mikkel Fougt Hansen, Anders Wolff

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    Abstract

    We present a new type of energy director (ED) for ultrasonic welding of microfluidic systems. These micropillar EDs are based on the replication of cone like protrusion structures introduced using a pico-second laser and may therefore be added to any mould surface accessible to a pico-second laser beam. The technology is demonstrated on an injection moulded microfluidic device featuring high-aspect ratio (h × w = 2000 μm × 550 μm) and free-standing channel walls, where bonding is achieved with no detectable channel deformation. The bonding strength is similar to conventional EDs and the fabricated system can withstand pressures of over 9.5 bar.
    Original languageEnglish
    Article number067001
    JournalJournal of Micromechanics and Microengineering
    Volume26
    Issue number6
    Number of pages7
    ISSN0960-1317
    DOIs
    Publication statusPublished - 2016

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