A high-voltage transistor with a low specific on-state resistance and that supports high voltage in the off-state includes one or more source regions disposed adjacent to a multi-layered extended drain structure which comprises extended drift regions separated from field plate members by one or more...http://www.google.de/patents/US20030197220?utm_source=gb-gplus-sharePatent US20030197220 - High-voltage vertical transistor with a multi-layered extended drain structure
