Patent ID: 6924530

Claim:
A double-diffused metal oxide semiconductor (DMOS) transistor, comprising: a semiconductor substrate which includes impurity ions of a first conductivity type; a buried layer formed on the semiconductor substrate and including impurity ions of a second conductivity type; an isolation layer formed in the buried layer and semiconductor substrate; an epitaxial layer formed on the isolation layer and the buried layer and including impurity ions of the second conductivity type; at least a pair of plug-type drains formed in the epitaxial layer and including impurity ions of the second conductivity type; a dielectric spacer formed on outer sidewalls of the plug-type drains, adjacent to the isolation layer; a plurality of body areas formed in the epitaxial layer and including impurity ions of the first conductivity type; a plurality of source areas formed in the body areas and including impurity ions of the second conductivity type; and a plurality of gate oxide layers and gates formed on the source areas.