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Electromagnetically actuated ball valve micropumps
( Former project )

C. Yamahata, F. Lacharme, J. Matter, S. Schnydrig, Y. Burri, M. A. M. Gijs

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Keywords: ball valve, micropump, lab-on-a-chip, PMMA, glass, powder blasting, electromagnetic actuation

Photograph of the glass ball valve micropump. [external dimensions: 36 mm × 22 mm]

 
We have developed two types of ball valve reciprocating micropumps for LOC applications; both are actuated with an external electromagnet. A first type of disposable micropump is made out of polymethylmethacrylate (PMMA), while a second type of re-usable micropump is made out of borosilicate glass; the latter has the advantage of being sterilisable at high temperature (120 °C). Both types of micropumps were realized using powder
  
blasting micro-erosion. The flexible magnetic actuation membranes were fabricated in polydimethylsiloxane (PDMS) with embedded NdFeB magnetic powder for the plastic micropump, and with a cylindrical NdFeB magnet for the glass micropump.

This project was presented at Transducers '05.
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Last modified: June 14th, 2008