The invention discloses a semiconductor structure and a manufacturing method thereof. The semiconductor structure includes a first doping area, a second doping area, a first conducting structure and a second conducting structure, wherein the first doping area includes a first contact area; the first doping area and the first contact area are provided with first conductivity type; the second doping area includes a second contact area; the second doping area and the second contact area are provided with second conductivity type opposite to the first conductivity type; and the first doping area is near to the second doping area.