Course: Micro Assembly using Surface Tension
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expired
Target group: PhD students, researchers and engineers involved in surface microfluidics, micromanipulation or precision assembly. Designers active in the field of microsystems and brought face to face with adhesion and stiction in MEMS.
| What |
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|---|---|
| When |
Mar 29, 2010
from 08:00 AM to 06:00 PM |
| Where | Lausanne, Switzerland |
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Content
- key concepts towards capillary forces modelling and its possible application to the fields of microrobotics and microassembly: surface energy, surface tension, the contact angles and wettability together with the Young-Dupré equation, the pressure drop across the interface described by the so-called Laplace equation, the curvature of a surface in the 3D space. Additional concepts are the contact angles hysteresis, the surface impurities and heterogeneities, the dynamic spreading of a liquid on a substrate.
- capillary forces modeling: models at equilibrium (2D and 3D), capillary forces at the sub-millimetric and nanometric scales
- self-assembly: applications, main parameters and models for self-centering effects and oscillations damping
- state-of-the-art, based on the fact that surface tension forces linearly decreases with the size while the weight decreases more quickly. While surface tension has been pointed out as being one of the disturbing effects in MEMS (stiction problems [kondo05, mastrangelo93, wu06]), other uses have been positively considered [berge93, hendriks05, lee00, oh06]. More particularly, surface tension effects have been applied to many fields such as capillary gripping [bark99, grutzeck99, obata04, biganzoli05, lambert06, schmid06], fluidic microvalves [feng03], actuation [borno06], optics [berge00].
