Next Article in Journal
Effects of Micromachining Processes on Electro-Osmotic Flow Mobility of Glass Surfaces
Next Article in Special Issue
Active Continuous-Flow Micromixer Using an External Braille Pin Actuator Array
Previous Article in Journal / Special Issue
Controllable Active Micro Droplets Merging Device Using Horizontal Pneumatic Micro Valves
Open AccessArticle

Enhanced Liquid Metal Micro Droplet Generation by Pneumatic Actuation Based on the StarJet Method

1
Laboratory for MEMS Applications, IMTEK, Department of Microsystems Engineering, University of Freiburg, Georges-Koehler-Allee 103, 79110 Freiburg, Germany
2
BioFluidix GmbH, Georges Köhler Allee 103, 79110 Freiburg, Germany
*
Author to whom correspondence should be addressed.
Micromachines 2013, 4(1), 49-66; https://doi.org/10.3390/mi4010049
Received: 5 December 2012 / Revised: 4 February 2013 / Accepted: 4 February 2013 / Published: 11 March 2013
We present a novel pneumatic actuation system for generation of liquid metal droplets according to the so-called StarJet method. In contrast to our previous work, the performance of the device has been significantly improved: the maximum droplet generation frequency in continuous mode has been increased to fmax = 11 kHz (formerly fmax = 4 kHz). In addition, the droplet diameter has been reduced to 60 μm. Therefore, a new fabrication process for the silicon nozzle chips has been developed enabling the production of smaller nozzle chips with higher surface quality. The size of the metal reservoir has been increased to hold up to 22 mL liquid metal and the performance and durability of the actuator has been improved by using stainless steel and a second pneumatic connection to control the sheath flow. Experimental results are presented regarding the characterization of the droplet generation, as well as printed metal structures. View Full-Text
Keywords: StarJet; metal droplets; 3D-printing; rapid prototyping; droplet generator; microparticle; soldering; bumping StarJet; metal droplets; 3D-printing; rapid prototyping; droplet generator; microparticle; soldering; bumping
Show Figures

Figure 1

MDPI and ACS Style

Lass, N.; Riegger, L.; Zengerle, R.; Koltay, P. Enhanced Liquid Metal Micro Droplet Generation by Pneumatic Actuation Based on the StarJet Method. Micromachines 2013, 4, 49-66.

Show more citation formats Show less citations formats

Article Access Map by Country/Region

1
Only visits after 24 November 2015 are recorded.
Search more from Scilit
 
Search
Back to TopTop