METHOD OF FABRICATING SEMICONDUCTOR DEVICE

摘要

A method of fabricating a semiconductor device is provided. The method comprises: forming a first layer; forming a P-well on the first layer; forming an isolation region in the P-well; performing an extra implantation on a surface between the P-well and the first layer; and forming a source/drain region. The method of the present invention can solve the punch through problem of the conventional iso-NMOS transistor without increasing cost.