Patent ID: 8436418

Claim:
A high-voltage semiconductor device, comprising: a substrate, having a first conductive type; a deep well, disposed in the substrate, and having a second conductive type different from the first conductive type; a first doped region, disposed in the deep well, and having the second conductive type; a high-voltage well, disposed in the substrate, and having the first conductive type; a second doped region, disposed in the high-voltage well, and having the second conductive type; a first gate structure, disposed on the high-voltage well between the first doped region and the second doped region; a doped channel region, disposed in the high-voltage well and being in contact with the second doped region and the deep well, and the doped channel region having the second conductive type; and a third doped region, disposed in the high-voltage well, and the third doped region having the second conductive type.