Digital microfluidic portable integrated device based on printed circuit board

A digital microfluidic portable integrated device based on a printed circuit board comprises a digital microfluidic chip, a temperature control module, a digital microfluidic electrode driving voltage circuit, a communication module, a controller and a power supply module. The digital micro-fluidic chip comprises an upper polar plate, a lower polar plate and a double faced adhesive tape for fixing the upper polar plate and the lower polar plate; the lower pole plate comprises a PCB base material, a contact electrode, a reaction area, a dielectric layer and a Teflon hydrophobic layer. The contact electrode and the reaction area are located on the PCB substrate, and the reaction area comprises a driving electrode and a liquid storage tank electrode; the contact electrode is an exposed electrode, and the driving electrode and the liquid storage tank electrode are covered by a solder mask layer; and the dielectric layer is green oil covering the driving electrode and the liquid storage tank electrode. The control