Patent ID: 6469352
Filing Date: 2002-10-22
Classification: H01L

Abstract:
A semiconductor overcurrent limiter having first and second terminals comprisinga semiconductor substrate having first and second surfaces; a vertical MOSFET, provided in said semiconductor substrate, having first source and gate electrodes, disposed on said first surface, and a first drain electrode disposed on said second surface to provide said first terminal; a lateral MOSFET, provided in said semiconductor substrate and connected in series with said vertical MOSFET, having second source, drain and gate electrodes, disposed on said first surface, and a back gate electrode provided on said second surface in common with said first drain electrode, said second source and gate electrodes being connected to said first source electrode to provide a connection node; and a zener diode, provided in said first surface, having an anode electrode, connected to said first gate electrode and formed in common with said second drain electrode to provide said second terminal, and a cathode electrode connected to said connection node.