Inkjet printing of dielectric layers with high relative permittivity for digital microfluidics

T. Schönfelder; F. Kemper; L. Pohle; M. Reif; M. Tienken; E. Beckert; A. Tünnermann

doi:10.1117/12.2578507

5 March 2021 Inkjet printing of dielectric layers with high relative permittivity for digital microfluidics

T. Schönfelder, F. Kemper, L. Pohle, M. Reif, M. Tienken, E. Beckert, A. Tünnermann

Proceedings Volume 11637, Microfluidics, BioMEMS, and Medical Microsystems XIX; 1163708 (2021) https://doi.org/10.1117/12.2578507
Event: SPIE BiOS, 2021, Online Only

Abstract

Digital microfluidics (DMF) is an emerging technology for liquid-handling of picoliter- to microliter-sized droplets. It enables individual control over droplets by applying electrical fields to an array of electrodes. Standard DMF devices include four key components: substrates, electrodes, a dielectric layer and hydrophobic layers. This work outlines the fabrication of dielectric layers with a high relative permittivity by inkjet printing. The layers consists of OrmoComp, silver nanoparticles and different solvents. OrmoComp has a relative permittivity of about 2.5. By adding 24.2 vol% of silver nanoparticles the relative permittivity rises to 76. Thereby the operating voltage can be reduced drastically.

Conference Presentation

Citation Download Citation

T. Schönfelder, F. Kemper, L. Pohle, M. Reif, M. Tienken, E. Beckert, and A. Tünnermann "Inkjet printing of dielectric layers with high relative permittivity for digital microfluidics", Proc. SPIE 11637, Microfluidics, BioMEMS, and Medical Microsystems XIX, 1163708 (5 March 2021); https://doi.org/10.1117/12.2578507

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