A vertical MOS transistor has a source region, a channel region, and a drain region that are vertically stacked, and a trench that extends from the top surface of the drain region through the drain region, the channel region, and partially into the source region. The vertical MOS transistor also has...http://www.google.es/patents/US7435628?utm_source=gb-gplus-sharePatente US7435628 - Method of forming a vertical MOS transistor
