TRANSISTOR FOR HIGH VOLTAGE AND MANUFACTRUING METHOD THEREOF

摘要

The present invention discloses a high voltage field effect transistor and fabricating the same. A high voltage field effect transistor includes a semiconductor substrate, a first conductivity type well in the semiconductor substrate, first and second conductivity type drift regions in the first conductivity type well, heavily doped impurity regions having first and second conductivity types in the first conductivity type drift region, a heavily doped second conductivity type impurity region in the second conductivity type drift region, and a lightly doped second conductivity type buffer layer in the second conductivity type drift region to surround the heavily doped second conductivity type impurity region.