Abstract:
A cover (10) for use in a digital microfluidics system (16) for manipulating samples in liquid portions or droplets. The digital microfluidics system (16) includes a first substrate (18) with an array of electrodes (24) and a central control unit (20) for controlling the selection and for providing a number of the electrodes with voltage for manipulating liquid portions or droplets by electrowetting. A working gap (30) with a gap height is located parallel to the array of electrodes (24) and in-between first and second hydrophobic surfaces (26,28) that face each other at least during operation of the digital microfluidics system (16).