Substrate for driving droplets, manufacturing method thereof, and microfluidic device

A substrate for driving droplets, the substrate being a passive digital microfluidic substrate, comprising:

• a first base substrate;
• a plurality of leads on the first base substrate;
• a plurality of driving electrodes on a side of the plurality of leads away from the first base substrate;
• and
• a shielding electrode on the side of the plurality of leads away from the first base substrate and grounded,
• wherein an orthographic projection of each lead on the first base substrate only partially overlaps an orthographic projection of at least one of the plurality of driving electrodes electrically connected to said lead on the first base substrate,
• wherein each of the plurality of driving electrodes is electrically connected to one of the plurality of leads via at least two via holes,
• wherein an orthographic projection of the shielding electrode on the first base substrate and an orthographic projection of at least one of the plurality of leads on the first base substrate at least partially overlap, and the shielding electrode and the plurality of driving electrodes are electrically insulated, and
• wherein the shielding electrode and the plurality of driving electrodes are in a same layer, and a part of the shielding electrode is around each of the plurality of driving electrodes, the orthographic projection of the shielding electrode on the first base substrate and an orthographic projection of the plurality of driving electrodes on the first base substrate do not overlap.