Patent ID: 6624471
Filing Date: 2003-09-23
Classification: H01L

Abstract:
A lateral DMOS transistor, comprising:a substrate of semiconductor material having a front surface; a body region with a first type of conductivity, extending in the substrate from the front surface; a source region and a drain region with a second type of conductivity, extending in the body region from the front surface and delimiting a channel region between them; a gate electrode which extends over the channel region and is insulated from the front surface by a layer of dielectric material; a body electrode, a source electrode, and a drain electrode which are in contact with the body region, the source region, and the drain region, respectively, the drain region comprising a high-concentration portion with which the drain electrode is in contact and a low-concentration portion which is delimited by the channel region; and an additional electrode in contact with the low-concentration portion of the drain region.