Patent ID: 6833585
Filing Date: 2004-12-21
Classification: H01L

Abstract:
A high voltage lateral Double diffused Metal Oxide Semiconductor (DMOS) transistor comprising:a semiconductor substrate of a first conductivity type; a body region of the first conductivity type formed in a surface of the substrate; source region of a second conductivity type formed within the body region; a channel region in the body region between the source and the edge of the body region; a gate electrode over the channel region and electrically isolated from the substrate by a dielectric material; a drift region of the second conductivity type formed in a second area of the semiconductor substrate adjacent to the channel region; a drain region of the second conductivity type formed within the drift region; and well regions of the first conductivity type formed to be horizontally spaced out within the drift region and separated thereby from at least one of the drain and channel regions.