Mechanism of electrohydrodynamic printing based on ac voltage without a nozzle electrode

  • Nguyen V
  • Byun D
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The electrohydrodynamic (EHD) spraying technique has been applied to inkjet printing technology for fabrication of printed electronics. The conventional EHD inkjet device is based on dc voltage and requires two electrodes: a nozzle electrode and an extractor electrode. This study notes several drawbacks of the dc-based EHD printing device such as electrical breakdown and demonstrates stable jetting by using the extractor electrode alone without the nozzle electrode and ac voltage. The continuous ejection of droplets can be obtained only by ac voltage, showing consistent ejection at every peak of electrical signal. The suggested EHD inkjet device prevents electrical breakdown.

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  • Vu Dat Nguyen

  • Doyoung Byun

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