Patent ID: 7569884

Claim:
A lateral double-diffused MOS transistor, comprising: a drift region having a first conductivity; a body having a second conductivity, said body being disposed in the drift region and having a channel thereon; a source region having the first conductivity, said source region being disposed within said body and having an upper region surrounded by a first impurity region having the first conductivity; an extended drain region having the first conductivity, said extended drain region being disposed in said drift region and separated from said body; a drain region having the first conductivity, said drain region being disposed in said extended drain region; a gate isolating layer and a gate conducting layer sequentially formed atop the channel occurring in said body; and a second impurity region having the first conductivity, said second impurity region being disposed between the channel and the extended drain region, wherein an end portion of the second impurity region overlaps an end portion of the channel.