Patent ID: 7307319
Filing Date: 2007-12-11
Classification: H01L

Abstract:
1. A high-voltage protection device comprising: a substrate having a well region therein; first and second electrode regions in the well region and separated by the length of a diode region, the electrode regions being of opposite conductivity type; a shallow-doped region in the diode region adjacent to the first electrode region and spaced apart from the second electrode region by a predetermined distance no more than about 50% of the diode region length, the shallow-doped region being of a same conductivity type as the first electrode region and shallower in depth than the electrode regions, wherein the shallow-doped region has a doping concentration lower than the doping concentration of the electrode regions; and; a gate electrode overlying the diode region and shallow-doped region and separated therefrom by a dielectric layer.