Patent ID: 8330218

Claim:
A semiconductor device using a double-diffused metal-oxide-semiconductor (DMOS) device, the semiconductor device comprising: a semiconductor substrate, in which a first conductive type well is formed; a first conductive type gate electrode formed on the semiconductor substrate with a intervening a gate insulating layer between the gate electrode and the semiconductor substrate; a second conductive type body electrode formed on the semiconductor substrate and separated from the gate electrode; a first conductive type drain electrode formed on the semiconductor substrate and separated from the gate electrode and the body electrode; a second conductive type first body region formed in the well and electrically connected to the body electrode; a second conductive type second body region extending from the first body region to the gate insulating layer and formed in the well; a first conductive type source region formed in the second body region and extending from the first body region to the gate insulating layer; and a first conductive type source electrode extending from the source region to surround the gate electrode on the semiconductor substrate with an insulating layer intervening between the source electrode and gate electrode.