Patent ID: 8951872
Filing Date: 2015-02-10
Classification: H01L

Abstract:
1. A method for fabricating a semiconductor device, comprising: providing a semiconductor substrate; forming a first well in the semiconductor substrate, the first well having a first type of conductivity; forming a second well in the semiconductor substrate, the second well having a second type of conductivity different from the first type of conductivity; forming a gate structure on the semiconductor substrate, the gate structure having a first portion overlying the first well and a second portion overlying the second well; forming a barrier region in the first well, the barrier region being formed by doping a dopant of the second type of conductivity; and forming a source in the second well and a drain in the first well, the source and drain having the first type of conductivity, the drain being adjacent the barrier region, wherein the barrier region does not extend to the source.