Microfluidic circuits, namely micro scale fluid handling circuits and micro scale fluid analysis circuits in the nature of microfluidic wells, channels, mixers, incubators, dividers, consolidators, immobilizers, washers, and systems of the above which feature a method of passively controlling movement of fluid by utilizing natural forces of attraction or repulsion associated with positive and negative capillarity between the fluid and at least selected regions of the inside surface of the microfluidic circuit
Electrical and Scientific Apparatus