Goal of this study was to show the feasibility of a self-alignment of microchips by means of liquid droplets. Model evaluations using Surface Evolver gave the behaviour of the droplets under alignment conditions and the influence of various parameters. Methods to create hydrophilic/hydrophobic structures on silicon surfaces were developed and tested. Thus, a selective wetting by the alignment medium was achieved.
Microprinted self-assembled monolayers of suitable compounds yielded contact angle differences of more than 120°. With surfaces structured in this way, first alignment experiments were performed. They show that a self-alignment with liquid droplets is possible.