Connecting interface for modularization of digital microfluidics

Hanping Yang; Shih-Kang Fan; Wensyang Hsu

doi:10.1117/12.765652

13 February 2008 Connecting interface for modularization of digital microfluidics

Hanping Yang, Shih-Kang Fan, Wensyang Hsu

Proceedings Volume 6886, Microfluidics, BioMEMS, and Medical Microsystems VI; 68860L (2008) https://doi.org/10.1117/12.765652
Event: MOEMS-MEMS 2008 Micro and Nanofabrication, 2008, San Jose, California, United States

Abstract

Here, interconnection technique to link digital microfluidic chips is proposed. Three kinds of digital microfluidic modules with connecting interface, including flexible module and two types of connector modules, are designed and fabricated. Since these modules are fabricated on a compliant polymer-based substrate (ITO PET), chip-to-chip droplet transportation even at different planes can be achieved by the proposed technique. A low-temperature fabrication process is developed for the polymer substrates, where the SU-8 acts as the insulator. Droplet transportation through electrowetting on curved surface is confirmed by testing on the bended flexible modules with different curvatures from 0 to 0.06 mm^-1at around 70 V_AC. Then the droplet transportations between flexible and connector modules are investigated. It is found that the gap size between two modules and the sidewall profiles at interface affect the droplet transportation directly. For the gap size around 50μm with a smooth perpendicular sidewall profile, 80 V_AC is shown to actuate droplet of 1.5 μl, 2.5 μl, or 3.5 μl to cross over the interface successfully.

Citation Download Citation

Hanping Yang, Shih-Kang Fan, and Wensyang Hsu "Connecting interface for modularization of digital microfluidics", Proc. SPIE 6886, Microfluidics, BioMEMS, and Medical Microsystems VI, 68860L (13 February 2008); https://doi.org/10.1117/12.765652

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KEYWORDS

Electrodes

Connectors

Interfaces

Microfluidics

Positron emission tomography

Polymers

Coating

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