Patent ID: 8786021

Claim:
A semiconductor structure, comprising: a substrate; an active device, formed in a surface area of the substrate, the active device having a first doped area, a second doped area and a third doped area, wherein the second doped area is disposed on the first doped area, the first doped area is disposed between the second and the third doped area, the first doped area has a first type conductivity, the third doped area has a second type conductivity and a drain, the first type conductivity and the second type conductivity are different; a field oxide layer, disposed on a part of the third doped area; and a poly-silicon resistor, disposed on the field oxide layer and electrically connected to the third doped area and coupled to a ground terminal, wherein the poly-silicon resistor comprising at least three electrical connecting terminals, the at least three electrical connecting terminals coupled to the drain, an internal circuit and the ground terminal, respectively.