Patent ID: 7417282

Claim:
A Vertical Double-Diffused Metal Oxide Semiconductor (VDMOS) device comprising: a drain region of a first conductivity type formed on an epitaxial layer of the first conductivity type, a plurality of double diffusion source regions isolated from the drain region formed on the epitaxial layer, and a gate electrode formed over the epitaxial layer to overlap with an upper portion of a part of the source region; wherein the plurality of double diffusion source regions comprise a first source region and a second source region, the first source region is in close proximity to the drain region and consists of a first diffusion structure which consists of a body region of a second conductivity type and a heavily doped diffusion layer of the second conductivity type formed in the body region, wherein the second source region is a second diffusion structure in which a heavily doped diffusion layer of the first conductivity type and a heavily doped diffusion layer of the second conductivity type are formed in a body region of the second conductivity type.