Flexible Printed Circuit Board as Novel Electrodes for Acoustofluidic Devices

Surface acoustic wave (SAW)-based acoustofluidics shows broad applications in biomedicine and chemistry. Conventional manufacturing process for SAW devices uses photolithography metal deposition, thus requires accessing cleanroom facilities. This study presents an efficient versatile technique based on a flexible printed circuit board (FPCB) developing acoustofluidic devices. By mechanically clamping interdigital electrodes (IDEs) made the FPCB onto piezoelectric substrate, SAWs can be effectively generated with additional matching network. The amplitudes were measured by laser vibrometer, which increases applied input voltage. FPCB-SAW device has been to actuate 10-?m microspheres form strong streaming vortices inside droplet, drive sessile droplet transportation substrate surface. use of rather than rigid (PCB) help cut down overall footprint save space. low requirement assembling facilitate providing fast prototyping