Miniaturized electrothermal flow induced infusion pump

An electrothermal flow (ETF) pumping device that pumps liquid with electrothermally-induced flow, comprising:

• a pumping chamber having an internal volume with an elongated length along a longitudinal axis defined by a top wall, a bottom wall opposite of the top wall with the internal volume therebetween;
• a fluid inlet fluidically coupled with and located at a first end of the pumping chamber;
• a fluid outlet fluidically coupled with and located at a second end of the pumping chamber, wherein the second end is opposite of the first end with respect to the longitudinal axis;
• one or more first electrode sets of three sequentially arranged parallel elongate electrodes extending laterally across the top wall of the chamber, each first electrode set having a first elongate electrode with a first phase closer to the first end of the chamber and with a third elongate electrode with a third phase closer to the second end of the chamber with a second elongate electrode with a second phase between the first elongate electrode and third elongate electrode, each of the three sequentially arranged parallel elongate electrodes having a different phase and being arranged in a sequence with a phase shift of 2π/3 from the first elongate electrode to the second elongate electrode and to the third elongate electrode,
• one or more second electrode sets of three sequentially arranged parallel elongate electrodes extending laterally across the bottom wall of the chamber, each second electrode set having a first elongate electrode with the first phase closer to the first end of the chamber and with a third elongate electrode with the third phase closer to the second end of the chamber with a second elongate electrode with the second phase between the first elongate electrode and third elongate electrode, each of the three sequentially arranged parallel elongate electrodes of the one or more second electrode sets having a different phase and being arranged in a sequence with a phase shift of 2π/3 from the first elongate electrode to the second elongate electrode and to the third elongate electrode,
• the first elongate electrode of the one or more first electrode sets being staggered with respect to the first elongate electrode of the one or more second electrode sets, the second elongate electrode of the one or more first electrode sets being staggered with respect to the second elongate electrode of the one or more second electrode sets, the third elongate electrode of the one or more first electrode sets being staggered with respect to the third elongate electrode of the one or more second electrode sets,
• a first top electrical lead electrically coupled with the first elongate electrodes of the one or more first electrode sets, a second top electrical lead electrically coupled with the second elongate electrodes of the one or more first electrode sets, a third top electrical lead electrically coupled with the third elongate electrodes of the one or more first electrode sets,
• a first bottom electrical lead electrically coupled with the first elongate electrodes of the one or more second electrode sets, a second bottom electrical lead electrically coupled with the second elongate electrodes of the one or more second electrode sets, a third bottom electrical lead electrically coupled with the third elongate electrodes of the one or more second electrode sets,
• at least one power supply electrically coupled with the first top electrical lead, second top electrical lead, third top electrical lead, first bottom electrical lead, second bottom electrical lead, and third bottom electrical lead so as to provide the phase shift of 2π/3 from the first elongate electrodes to the second elongate electrodes and to the third elongate electrodes of each of the one or more first electrode sets and the one or more second electrode sets to pump liquid with the electrothermally-induced flow.