Patent ID: 6020617
Filing Date: 2000-02-01
Classification: H01L

Abstract:
A semiconductor device comprising a semiconductor body which is provided with a lateral MOS transistor at a surface, said semiconductor body comprising a comparatively weakly doped region of a first conductivity type adjoining the surface, in which region an active region is defined by a pattern of field oxide, which transistor comprises a source and a drain in the form of strongly doped surface zones of the opposed, second conductivity type which extend into the active region between two mutually opposed sides of the active region, said drain being provided with a weakly doped drain extension of the second conductivity type extending between the strongly doped drain zone and a channel region of the transistor situated between the drain extension and the source zone, while a gate electrode is provided above the channel region and electrically insulated therefrom, characterized in that the strongly doped drain zone extends only over part of the width of the active region and is separated from said sides of the active region by an interposed, weakly doped surface region, while the gate electrode, seen at the surface, extends at least substantially over a corresponding portion of the width of the active region, and the regions situated between the gate electrode and the field oxide are covered by a conductive layer which is conductively connected to the source.