Microfluidic chip

A microfluidic chip, comprising:

• a middle region and a peripheral region surrounding the middle region;
• wherein the middle region comprises a liquid storage region and a detection region;
• the microfluidic chip comprises a first substrate and a second substrate opposite to each other;
• the first substrate comprises a first base plate and a first electrode layer on a side of the first base plate proximal to the second substrate;
• the second substrate comprises a second base plate and a second electrode layer on a side of the second base plate proximal to the first substrate;
• wherein
• the first substrate comprises a liquid storage tank on a side of the first base plate proximal to the second substrate and a liquid inlet on a side of the first base plate away from the second substrate, the liquid inlet penetrates through a surface of the liquid storage tank away from the second substrate;
• the liquid storage tank and the liquid inlet are both in the liquid storage region;
• a cross section of the liquid storage tank taken along a thickness direction of the first substrate and a direction parallel to a direction in which the liquid storage region points towards the detection region has a first side proximal to the detection region;
• the first side has a first end point and a second end point, and the first end point is farther away from the second substrate than the second end point;
• an extending direction of a line connecting the first end point and the second end point is inclined with respect to an axial direction of the liquid inlet, and a distance from the first end point to an axis of the liquid inlet is smaller than a distance from the second end point to the axis of the liquid inlet;
• and
• the liquid storage tank further comprises a second side opposite to the first side, and the other pair of sides arranged opposite to each other, which are a third side and a fourth side;
• wherein a dihedral angle between the surface and the second side, the third side or the fourth side is 90 degrees or approximately 90 degrees.